Severe Storms

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...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 0455 PM CDT Thu Jul 17 2025 Valid 191200Z - 251200Z ...Days 3-5/Saturday-Monday... A mid-level trough and attendant dry cold front will move through the Pacific Northwest on Day 3/Saturday. Robust onshore flow will persist across the Cascades, bringing breezy conditions to the Columbia Basin. Despite cooler post-frontal temperatures, sustained west winds of around 15 mph (20 mph in favored Cascade gaps) and relative humidity as low as 15 percent will support a fire weather threat amid dry fuels across the Columbia Basin. Enhanced mid-level flow at the base of the trough overrunning a dry boundary layer in place across southern Idaho will bring stronger winds to the Snake River Plain Day 3/Saturday, raising wildfire spread potential within critically dry fuels. A deepening, positively-tilted trough across the Pacific Northwest and increase in mid-level winds will support a broader area of dry southwesterly flow across the Great Basin, NV and southern ID by Day 4/Sunday, with the fire weather threat shifting southeastward to include northwestern UT by Day 5/Monday. The trough will also aid in pushing residual monsoon moisture and thunderstorm development currently across portions of the Intermountain West along and east of the Continental Divide by early next week, while also mitigating fire weather concerns for the Pacific Northwest as cooler temperatures, cloud cover and higher relative humidity move into the region. ...Days 6-8/Tuesday-Thursday... Long term ensemble guidance indicates some form of mid-level troughing persisting across the Pacific Northwest through the middle of next week, maintaining a dry southwesterly flow over much of the interior of the West. However, relaxing mid-level flow and reduced surface pressure gradients as a subtropical high propagates westward across the southern U.S. should promote lighter winds across the Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday. ..Williams.. 07/17/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0522 Status Updates
STATUS FOR WATCH 0522 HAS NOT BEEN ISSUED YET Read more

WW 0521 Status Updates
STATUS REPORT ON WW 521 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1700 ..WENDT..07/17/25 ATTN...WFO...CAR...GYX...BTV... STATUS REPORT FOR WS 521 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MEC003-007-017-021-025-172240- ME . MAINE COUNTIES INCLUDED ARE AROOSTOOK FRANKLIN OXFORD PISCATAQUIS SOMERSET NHC003-007-009-172240- NH . NEW HAMPSHIRE COUNTIES INCLUDED ARE CARROLL COOS GRAFTON NYC019-172240- NY . NEW YORK COUNTIES INCLUDED ARE CLINTON Read more

WW 521 SEVERE TSTM ME NH NY VT 171825Z - 180100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 521 NWS Storm Prediction Center Norman OK 225 PM EDT Thu Jul 17 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Northern Maine Northern and Central New Hampshire Far Northern New York Northern and Central Vermont * Effective this Thursday afternoon and evening from 225 PM until 900 PM EDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible A tornado or two possible SUMMARY...Scattered thunderstorms are forecast to develop and intensify this afternoon across the Watch area. A couple of transient supercells are possible as well as a few organized multicells. The primary severe hazard will be strong to severe gusts (50-65 mph) capable of wind damage, but a tornado is possible with the more intense transient supercells. The severe thunderstorm watch area is approximately along and 75 statute miles east and west of a line from 20 miles north northwest of Caribou ME to 15 miles south southwest of Montpelier VT. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 400. Mean storm motion vector 23030. ...Smith Read more

No Mesoscale Discussions are in effect as of Thu Jul 17 20:00:13 UTC 2025.

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0257 PM CDT Thu Jul 17 2025 Valid 181200Z - 191200Z A mid-level trough coming into the Pacific Northwest interacting with peripheral monsoon moisture will support mainly dry, isolated high-based thunderstorms across portions of northeastern NV into southeastern ID where pockets of receptive fuels remain. Farther southeast across the Greater Four Corners region, deeper monsoon moisture (precipitable water values greater than 0.80") will support heavier precipitation cores from thunderstorms, mitigating new ignition potential. Otherwise, dry and breezy conditions east of the Cascades are still expected as westerly flow increases from the deepening Pacific Northwest trough. An elevated fire weather threat remains with locally critical conditions possible in favored Cascade gaps amid dry fuels. ..Williams.. 07/17/2025 .PREV DISCUSSION... /ISSUED 1258 AM CDT Thu Jul 17 2025/ ...Synopsis... A deeper trough will traverse the Pacific Northwest on D2/Friday bringing more widespread Elevated conditions across the areas along and east of the Cascades. Afternoon relative humidity around 10-20 percent will overlap sustained westerly winds at 10-15 mph (locally higher). Some locally Critical conditions may persist for a couple of hours where terrain enhancements favor locally stronger winds in the Cascade Gaps. ...Dry Thunderstorms... The western shortwave will bring forcing for ascent across portions of northern Nevada into southern Idaho and eastern Wyoming. This area remains on the periphery of deeper moisture across the Southwest into the Great Basin. High based convection and very dry boundary layer conditions will favor little to no measurable precipitation with potential for new ignitions from lightning. ...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 0257 PM CDT Thu Jul 17 2025 Valid 181200Z - 191200Z A mid-level trough coming into the Pacific Northwest interacting with peripheral monsoon moisture will support mainly dry, isolated high-based thunderstorms across portions of northeastern NV into southeastern ID where pockets of receptive fuels remain. Farther southeast across the Greater Four Corners region, deeper monsoon moisture (precipitable water values greater than 0.80") will support heavier precipitation cores from thunderstorms, mitigating new ignition potential. Otherwise, dry and breezy conditions east of the Cascades are still expected as westerly flow increases from the deepening Pacific Northwest trough. An elevated fire weather threat remains with locally critical conditions possible in favored Cascade gaps amid dry fuels. ..Williams.. 07/17/2025 .PREV DISCUSSION... /ISSUED 1258 AM CDT Thu Jul 17 2025/ ...Synopsis... A deeper trough will traverse the Pacific Northwest on D2/Friday bringing more widespread Elevated conditions across the areas along and east of the Cascades. Afternoon relative humidity around 10-20 percent will overlap sustained westerly winds at 10-15 mph (locally higher). Some locally Critical conditions may persist for a couple of hours where terrain enhancements favor locally stronger winds in the Cascade Gaps. ...Dry Thunderstorms... The western shortwave will bring forcing for ascent across portions of northern Nevada into southern Idaho and eastern Wyoming. This area remains on the periphery of deeper moisture across the Southwest into the Great Basin. High based convection and very dry boundary layer conditions will favor little to no measurable precipitation with potential for new ignitions from lightning. ...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 0257 PM CDT Thu Jul 17 2025 Valid 181200Z - 191200Z A mid-level trough coming into the Pacific Northwest interacting with peripheral monsoon moisture will support mainly dry, isolated high-based thunderstorms across portions of northeastern NV into southeastern ID where pockets of receptive fuels remain. Farther southeast across the Greater Four Corners region, deeper monsoon moisture (precipitable water values greater than 0.80") will support heavier precipitation cores from thunderstorms, mitigating new ignition potential. Otherwise, dry and breezy conditions east of the Cascades are still expected as westerly flow increases from the deepening Pacific Northwest trough. An elevated fire weather threat remains with locally critical conditions possible in favored Cascade gaps amid dry fuels. ..Williams.. 07/17/2025 .PREV DISCUSSION... /ISSUED 1258 AM CDT Thu Jul 17 2025/ ...Synopsis... A deeper trough will traverse the Pacific Northwest on D2/Friday bringing more widespread Elevated conditions across the areas along and east of the Cascades. Afternoon relative humidity around 10-20 percent will overlap sustained westerly winds at 10-15 mph (locally higher). Some locally Critical conditions may persist for a couple of hours where terrain enhancements favor locally stronger winds in the Cascade Gaps. ...Dry Thunderstorms... The western shortwave will bring forcing for ascent across portions of northern Nevada into southern Idaho and eastern Wyoming. This area remains on the periphery of deeper moisture across the Southwest into the Great Basin. High based convection and very dry boundary layer conditions will favor little to no measurable precipitation with potential for new ignitions from lightning. ...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 0257 PM CDT Thu Jul 17 2025 Valid 181200Z - 191200Z A mid-level trough coming into the Pacific Northwest interacting with peripheral monsoon moisture will support mainly dry, isolated high-based thunderstorms across portions of northeastern NV into southeastern ID where pockets of receptive fuels remain. Farther southeast across the Greater Four Corners region, deeper monsoon moisture (precipitable water values greater than 0.80") will support heavier precipitation cores from thunderstorms, mitigating new ignition potential. Otherwise, dry and breezy conditions east of the Cascades are still expected as westerly flow increases from the deepening Pacific Northwest trough. An elevated fire weather threat remains with locally critical conditions possible in favored Cascade gaps amid dry fuels. ..Williams.. 07/17/2025 .PREV DISCUSSION... /ISSUED 1258 AM CDT Thu Jul 17 2025/ ...Synopsis... A deeper trough will traverse the Pacific Northwest on D2/Friday bringing more widespread Elevated conditions across the areas along and east of the Cascades. Afternoon relative humidity around 10-20 percent will overlap sustained westerly winds at 10-15 mph (locally higher). Some locally Critical conditions may persist for a couple of hours where terrain enhancements favor locally stronger winds in the Cascade Gaps. ...Dry Thunderstorms... The western shortwave will bring forcing for ascent across portions of northern Nevada into southern Idaho and eastern Wyoming. This area remains on the periphery of deeper moisture across the Southwest into the Great Basin. High based convection and very dry boundary layer conditions will favor little to no measurable precipitation with potential for new ignitions from lightning. ...Please see www.spc.noaa.gov/fire for graphic product... Read more