Severe Storms

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Mon Jun 23 2025 Valid 241200Z - 251200Z ...Southern Great Basin/Four Corners region... Stronger mid-level flow ahead of an upper-level trough will remain over the greater Four Corners region. Efficient daytime boundary later mixing will continue to promote a corridor of breezy southwest winds amid afternoon relative humidity of 10-15 percent to promote Elevated fire weather conditions from northern Arizona, southeastern Arizona into southern Wyoming. ...Northern Nevada... Some convection aided by higher terrain is expected across northern Nevada Tuesday afternoon. Limited instability/moisture profiles along with marginal fuel dryness (ERC values in the 80-85 percentile range) should limit ignition efficiency of slow moving isolated showers and thunderstorms across the area. ..Williams.. 06/23/2025 .PREV DISCUSSION... /ISSUED 0111 AM CDT Mon Jun 23 2025/ ...Synopsis... Another day of elevated fire weather conditions is expected for parts of the intermountain West on Tuesday. An upper trough currently settling into the southern Great Basin/lower CO River Valley is expected to stall and slowly de-amplify over the next 48 hours. This will maintain a belt of modest mid-level flow over parts of the eastern Great Basin/western Four Corners region. Although pressure gradient winds will generally be in the mid/upper teens, diurnal heating and deep mixing of a dry air mass will promote frequent gusts between 20-35 mph across the region - especially from northern AZ into eastern UT and southern WY under a belt of somewhat stronger 700-500 mb flow. Afternoon RH minimums in the low to mid teens are expected, and coupled with dry fuels, will help support another day of elevated fire weather conditions (though transient periods of critical conditions are anticipated where stronger gusts can occur). ...Dry Thunderstorms... Isolated thunderstorms appear possible Tuesday afternoon across portions of northeastern Nevada under the upper-level low. Cold temperatures aloft combined with modest mid-level moisture and strong low-level heating will support thermodynamic profiles adequate for weak convection, but perhaps limited precipitation. Given dry fuels across the region, some dry-thunderstorm risk is expected. The primary limiting factor to a more substantial dry-thunderstorm concern is slow storm motions (less than 10 knots), which should increase the probability of wetting rainfall under the convective cores. ...Please see www.spc.noaa.gov/fire for graphic product... Read more