Severe Storms

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0453 PM CDT Wed Jul 02 2025 Valid 041200Z - 101200Z ...Day 3/Friday... A negatively tilted short-wave trough and attendant mid-level wind maxima entering into the western U.S. on Day 3/Friday will increase fire weather concerns across much of the Great Basin. The stronger dry, southwest flow will scour out remaining monsoon moisture across the much of NV and southwest UT resulting in a deep, well mixed boundary layer and low surface relative humidity. In addition, widespread showers and thunderstorms ahead of the trough will affect portions of eastern Oregon and Northern Rockies region. ...Day 4-8/Saturday-Wednesday... A mid-level trough will lift into the Northern High Plains on Day 4/Saturday with a broad but reduced southwest flow pattern continuing to push remaining monsoon moisture and associated high terrain convection along and east of the Continental Divide by Day 5/Sunday, mitigating the threat of new lightning ignitions for much of the Intermountain West. A building mid-level ridge over the Desert Southwest will support climbing temperatures to above seasonal averages across much of the West starting early next week. This pattern could also usher in another round of monsoon moisture into the Lower Colorado River Basin and southern California as early as Day 5/Sunday, although enough forecast uncertainty exists to preclude critical probabilities of dry thunderstorms at this time. ..Williams.. 07/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

MD 1540 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PORTIONS OF NORTHEAST WISCONSIN AND THE UP/LP OF MICHIGAN
Mesoscale Discussion 1540 NWS Storm Prediction Center Norman OK 0328 PM CDT Wed Jul 02 2025 Areas affected...portions of northeast Wisconsin and the UP/LP of Michigan Concerning...Severe potential...Watch unlikely Valid 022028Z - 022200Z Probability of Watch Issuance...5 percent SUMMARY...Isolated severe winds gusts/hail possible this afternoon/evening. DISCUSSION...Visible satellite/radar shows a small cluster of cells over portions of northeast Wisconsin, and a few isolated cells over the LP of Michigan, traversing southeast. These storms initiated during the heating of the day amid a weakly capped environment. Persistent downstream heating, where dew point temperatures are in the low 60s F, is yielding MLCAPE values near 1000 J/kg and low level lapse rates near 9 C/km. The weak instability combined with marginal deep-layer shear (approaching 25-35 kt) should limit storm organization. That said, some potential exists for a localized damaging wind gust or severe hail with the strongest cells throughout the remainder of the afternoon and into the evening. ..Karstens/Mosier.. 07/02/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DTX...APX...GRR...MQT...GRB...MKX...ARX... LAT...LON 45918727 45928808 45558936 45098997 44308987 43708952 43438906 43128768 42898593 42768480 42698390 42968291 43888303 44338350 45078356 45378498 45878694 45838684 45918727 MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0258 PM CDT Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...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 Wed Jul 02 2025 Valid 031200Z - 041200Z ...Northern Great Basin and Western Nevada... An approaching short wave trough and stronger mid-level flow will support shower and thunderstorm development across northeastern CA into southeastern OR Thursday. Faster northeast thunderstorm trajectories will limit precipitation amounts supporting an isolated dry thunderstorm threat. A corridor of daytime instability and precipitable water values of 0.5 to 0.7 inches will bring an isolated dry thunderstorm threat to the higher terrain of far northern NV, northern UT as well as far southeastern ID. The incoming trough will also promote stronger downslope flow east of the Sierra Crest across northwestern NV. Enhanced downslope winds from the west of 15-20 mph and relative humidity of around 15% supports continuation elevated fire weather highlights. ...Western Slope and Eastern Utah... A broad plume of monsoon moisture over the region along with daytime heating will promote a mix of wet and dry thunderstorms over higher terrain of the Western Slope as well as eastern UT. Some lightning ignitions are possible within remaining pockets of receptive fuels. ..Williams.. 07/02/2025 .PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/ ...Synopsis... Broad troughing over the western US will continue as a compact shortwave trough moves across northern CA Thursday. 40-50 kt westerly flow will overspread the northern Great Basin. This will encourage dry downslope flow across parts of western NV. At the same time, continued monsoon moisture will allow widespread showers and thunderstorms over the Intermountain West. ...Northwest Great Basin... Continued westerly flow aloft will overspread the northern Great Basin Thursday afternoon. Dry downslope winds of 15-25 mph are expected, aided by the increasing winds aloft. Very warm temperatures, and the dry downslope trajectories, will support widespread RH values below 15%. The increase in surface winds amid a warm and dry boundary layer and dry fuels will support elevated wildfire spread potential Thursday. ...Western Slope... Another day of widespread showers and thunderstorms is expected across the eastern Great Basin and western Rockies Thursday. A continued surge of robust monsoon moisture (PWATS above 0.8 inches) will support a mixed mode of wet and occasionally dry storms. Widespread QPF of 0.1-0.25 inches in the preceding days suggest area fuels are likely to become less receptive to lightning ignitions with time. However, the coverage of storms does support at least isolated potential for dry strikes in receptive fuels across western CO/WY into eastern UT. ...Please see www.spc.noaa.gov/fire for graphic product... Read more