Aggregator

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PARTS OF THE NORTHERN/CENTRAL GREAT PLAINS...MIDWEST...AND VA VICINITY... ...SUMMARY... Scattered large to very large hail and severe gusts are possible across the northern/central Great Plains during the late afternoon and evening. Scattered damaging winds are possible across parts of the Midwest and the Lower Mid-Atlantic States into this afternoon. Low-probability tornado potential is also evident in the Midwest and parts of the Great Plains. ...Northern/central Great Plains... A favorable setup for discrete supercells is anticipated along a lee trough from the WY/NE border into eastern MT and far western ND. While rich boundary-layer moisture will remain confined across southern NE, a ribbon of increasing moisture will be advected north-northwest beneath a pronounced EML. A shortwave trough will eject along the Canadian border across the Northwest. An attendant belt of 40-45 kt mid-level westerlies will overspread much of MT into ND, with a separate belt of confluent westerlies across southeast WY through NE. Deep-layer shear profiles will be conducive to discrete supercells as initial storms develop during the mid to late afternoon, with large to very hail possible. Signals for greater convective coverage along the MT/ND border and in the western NE vicinity may support a greater than isolated severe gust threat. With a deeper and hotter boundary layer with southward extent into KS, upscale growth into a forward-propagating cluster eastward along the NE/KS border is possible this evening. ...Midwest... An MCS will likely be ongoing at 12Z across IA, with a separate cluster of elevated convection possible farther northeast in WI. A downstream split in severe potential may occur as the MCS likely persists and evolves southeastward. The WI activity may progress and intensify across Lower MI by afternoon, where deep-layer shear will be stronger but instability weaker. Scattered damaging winds and marginal severe hail should be the main hazards. The IA MCS should progress along the northwest/southeast-oriented MLCAPE gradient towards the Lower OH Valley. Most CAMs struggle to greatly intensify this MCS, perhaps owing to warming mid-level temperatures modulating instability. Scattered damaging wind swaths, with some hail risk along the southwest flank of the MCS, may occur in the morning, but will most likely peak into the afternoon. ...VA to northern NC... A similar setup to Friday afternoon is anticipated, but perhaps shifted slightly farther north. Ample buoyancy is again expected across the Carolina Coastal Plain into southern VA with a gradient in MLCAPE shifted northward in the Mid-Atlantic States. Around 20-kt 500-mb westerlies will support weakly organized multicell clusters as scattered to numerous storms develop through the afternoon. Sporadic strong gusts producing damaging winds are possible. ..Grams/Wendt.. 07/19/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PARTS OF THE NORTHERN/CENTRAL GREAT PLAINS...MIDWEST...AND VA VICINITY... ...SUMMARY... Scattered large to very large hail and severe gusts are possible across the northern/central Great Plains during the late afternoon and evening. Scattered damaging winds are possible across parts of the Midwest and the Lower Mid-Atlantic States into this afternoon. Low-probability tornado potential is also evident in the Midwest and parts of the Great Plains. ...Northern/central Great Plains... A favorable setup for discrete supercells is anticipated along a lee trough from the WY/NE border into eastern MT and far western ND. While rich boundary-layer moisture will remain confined across southern NE, a ribbon of increasing moisture will be advected north-northwest beneath a pronounced EML. A shortwave trough will eject along the Canadian border across the Northwest. An attendant belt of 40-45 kt mid-level westerlies will overspread much of MT into ND, with a separate belt of confluent westerlies across southeast WY through NE. Deep-layer shear profiles will be conducive to discrete supercells as initial storms develop during the mid to late afternoon, with large to very hail possible. Signals for greater convective coverage along the MT/ND border and in the western NE vicinity may support a greater than isolated severe gust threat. With a deeper and hotter boundary layer with southward extent into KS, upscale growth into a forward-propagating cluster eastward along the NE/KS border is possible this evening. ...Midwest... An MCS will likely be ongoing at 12Z across IA, with a separate cluster of elevated convection possible farther northeast in WI. A downstream split in severe potential may occur as the MCS likely persists and evolves southeastward. The WI activity may progress and intensify across Lower MI by afternoon, where deep-layer shear will be stronger but instability weaker. Scattered damaging winds and marginal severe hail should be the main hazards. The IA MCS should progress along the northwest/southeast-oriented MLCAPE gradient towards the Lower OH Valley. Most CAMs struggle to greatly intensify this MCS, perhaps owing to warming mid-level temperatures modulating instability. Scattered damaging wind swaths, with some hail risk along the southwest flank of the MCS, may occur in the morning, but will most likely peak into the afternoon. ...VA to northern NC... A similar setup to Friday afternoon is anticipated, but perhaps shifted slightly farther north. Ample buoyancy is again expected across the Carolina Coastal Plain into southern VA with a gradient in MLCAPE shifted northward in the Mid-Atlantic States. Around 20-kt 500-mb westerlies will support weakly organized multicell clusters as scattered to numerous storms develop through the afternoon. Sporadic strong gusts producing damaging winds are possible. ..Grams/Wendt.. 07/19/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PARTS OF THE NORTHERN/CENTRAL GREAT PLAINS...MIDWEST...AND VA VICINITY... ...SUMMARY... Scattered large to very large hail and severe gusts are possible across the northern/central Great Plains during the late afternoon and evening. Scattered damaging winds are possible across parts of the Midwest and the Lower Mid-Atlantic States into this afternoon. Low-probability tornado potential is also evident in the Midwest and parts of the Great Plains. ...Northern/central Great Plains... A favorable setup for discrete supercells is anticipated along a lee trough from the WY/NE border into eastern MT and far western ND. While rich boundary-layer moisture will remain confined across southern NE, a ribbon of increasing moisture will be advected north-northwest beneath a pronounced EML. A shortwave trough will eject along the Canadian border across the Northwest. An attendant belt of 40-45 kt mid-level westerlies will overspread much of MT into ND, with a separate belt of confluent westerlies across southeast WY through NE. Deep-layer shear profiles will be conducive to discrete supercells as initial storms develop during the mid to late afternoon, with large to very hail possible. Signals for greater convective coverage along the MT/ND border and in the western NE vicinity may support a greater than isolated severe gust threat. With a deeper and hotter boundary layer with southward extent into KS, upscale growth into a forward-propagating cluster eastward along the NE/KS border is possible this evening. ...Midwest... An MCS will likely be ongoing at 12Z across IA, with a separate cluster of elevated convection possible farther northeast in WI. A downstream split in severe potential may occur as the MCS likely persists and evolves southeastward. The WI activity may progress and intensify across Lower MI by afternoon, where deep-layer shear will be stronger but instability weaker. Scattered damaging winds and marginal severe hail should be the main hazards. The IA MCS should progress along the northwest/southeast-oriented MLCAPE gradient towards the Lower OH Valley. Most CAMs struggle to greatly intensify this MCS, perhaps owing to warming mid-level temperatures modulating instability. Scattered damaging wind swaths, with some hail risk along the southwest flank of the MCS, may occur in the morning, but will most likely peak into the afternoon. ...VA to northern NC... A similar setup to Friday afternoon is anticipated, but perhaps shifted slightly farther north. Ample buoyancy is again expected across the Carolina Coastal Plain into southern VA with a gradient in MLCAPE shifted northward in the Mid-Atlantic States. Around 20-kt 500-mb westerlies will support weakly organized multicell clusters as scattered to numerous storms develop through the afternoon. Sporadic strong gusts producing damaging winds are possible. ..Grams/Wendt.. 07/19/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PARTS OF THE NORTHERN/CENTRAL GREAT PLAINS...MIDWEST...AND VA VICINITY... ...SUMMARY... Scattered large to very large hail and severe gusts are possible across the northern/central Great Plains during the late afternoon and evening. Scattered damaging winds are possible across parts of the Midwest and the Lower Mid-Atlantic States into this afternoon. Low-probability tornado potential is also evident in the Midwest and parts of the Great Plains. ...Northern/central Great Plains... A favorable setup for discrete supercells is anticipated along a lee trough from the WY/NE border into eastern MT and far western ND. While rich boundary-layer moisture will remain confined across southern NE, a ribbon of increasing moisture will be advected north-northwest beneath a pronounced EML. A shortwave trough will eject along the Canadian border across the Northwest. An attendant belt of 40-45 kt mid-level westerlies will overspread much of MT into ND, with a separate belt of confluent westerlies across southeast WY through NE. Deep-layer shear profiles will be conducive to discrete supercells as initial storms develop during the mid to late afternoon, with large to very hail possible. Signals for greater convective coverage along the MT/ND border and in the western NE vicinity may support a greater than isolated severe gust threat. With a deeper and hotter boundary layer with southward extent into KS, upscale growth into a forward-propagating cluster eastward along the NE/KS border is possible this evening. ...Midwest... An MCS will likely be ongoing at 12Z across IA, with a separate cluster of elevated convection possible farther northeast in WI. A downstream split in severe potential may occur as the MCS likely persists and evolves southeastward. The WI activity may progress and intensify across Lower MI by afternoon, where deep-layer shear will be stronger but instability weaker. Scattered damaging winds and marginal severe hail should be the main hazards. The IA MCS should progress along the northwest/southeast-oriented MLCAPE gradient towards the Lower OH Valley. Most CAMs struggle to greatly intensify this MCS, perhaps owing to warming mid-level temperatures modulating instability. Scattered damaging wind swaths, with some hail risk along the southwest flank of the MCS, may occur in the morning, but will most likely peak into the afternoon. ...VA to northern NC... A similar setup to Friday afternoon is anticipated, but perhaps shifted slightly farther north. Ample buoyancy is again expected across the Carolina Coastal Plain into southern VA with a gradient in MLCAPE shifted northward in the Mid-Atlantic States. Around 20-kt 500-mb westerlies will support weakly organized multicell clusters as scattered to numerous storms develop through the afternoon. Sporadic strong gusts producing damaging winds are possible. ..Grams/Wendt.. 07/19/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PARTS OF THE NORTHERN/CENTRAL GREAT PLAINS...MIDWEST...AND VA VICINITY... ...SUMMARY... Scattered large to very large hail and severe gusts are possible across the northern/central Great Plains during the late afternoon and evening. Scattered damaging winds are possible across parts of the Midwest and the Lower Mid-Atlantic States into this afternoon. Low-probability tornado potential is also evident in the Midwest and parts of the Great Plains. ...Northern/central Great Plains... A favorable setup for discrete supercells is anticipated along a lee trough from the WY/NE border into eastern MT and far western ND. While rich boundary-layer moisture will remain confined across southern NE, a ribbon of increasing moisture will be advected north-northwest beneath a pronounced EML. A shortwave trough will eject along the Canadian border across the Northwest. An attendant belt of 40-45 kt mid-level westerlies will overspread much of MT into ND, with a separate belt of confluent westerlies across southeast WY through NE. Deep-layer shear profiles will be conducive to discrete supercells as initial storms develop during the mid to late afternoon, with large to very hail possible. Signals for greater convective coverage along the MT/ND border and in the western NE vicinity may support a greater than isolated severe gust threat. With a deeper and hotter boundary layer with southward extent into KS, upscale growth into a forward-propagating cluster eastward along the NE/KS border is possible this evening. ...Midwest... An MCS will likely be ongoing at 12Z across IA, with a separate cluster of elevated convection possible farther northeast in WI. A downstream split in severe potential may occur as the MCS likely persists and evolves southeastward. The WI activity may progress and intensify across Lower MI by afternoon, where deep-layer shear will be stronger but instability weaker. Scattered damaging winds and marginal severe hail should be the main hazards. The IA MCS should progress along the northwest/southeast-oriented MLCAPE gradient towards the Lower OH Valley. Most CAMs struggle to greatly intensify this MCS, perhaps owing to warming mid-level temperatures modulating instability. Scattered damaging wind swaths, with some hail risk along the southwest flank of the MCS, may occur in the morning, but will most likely peak into the afternoon. ...VA to northern NC... A similar setup to Friday afternoon is anticipated, but perhaps shifted slightly farther north. Ample buoyancy is again expected across the Carolina Coastal Plain into southern VA with a gradient in MLCAPE shifted northward in the Mid-Atlantic States. Around 20-kt 500-mb westerlies will support weakly organized multicell clusters as scattered to numerous storms develop through the afternoon. Sporadic strong gusts producing damaging winds are possible. ..Grams/Wendt.. 07/19/2025 Read more

000
ABPZ20 KNHC 190547
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Fri Jul 18 2025

For the eastern and central North Pacific east of 180 longitude:

Well Southwest of the Baja California Peninsula:
A large area of disorganized showers and thunderstorms, associated
with a tropical wave, is located about 1200 miles southwest of the
Baja California peninsula. Environmental conditions are marginally
conducive for development of this system during the next few days,
as it moves west-northwestward at 10 to 15 mph. However, by the
early to middle part of next week, conditions are expected to become
unfavorable for further development.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...low...20 percent.

$$
Forecaster Jelsema

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...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 1240 AM CDT Sat Jul 19 2025 Valid 201200Z - 211200Z ...Synopsis... The upper-level pattern on Sunday will be similar to Saturday. However, stronger mid-level flow may nudge southward as the upper trough amplifies through the period in the Northwest. Surface troughing will develop in the northern High Plains. ...Northern Great Basin... Another day of elevated fire weather can be expected. With the stronger mid-level winds extending more to the south, greater spatial coverage of at least briefly 20+ mph winds may occur. Overall, however, 15-20 mph winds will be most common. RH of 10-20% will be possible in Nevada while Idaho will more likely see 15-20% by the afternoon. Model guidance does show some potential for high cloud cover which could also limit the duration of critical conditions. Ensemble guidance shows low probability of sustained critical conditions likely on account of those uncertainties. ..Wendt.. 07/19/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1238 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...Synopsis... Upper-level ridging will persist across much of the southern half of the U.S. today. A weak upper-level low will be positioned over southern California into northern Baja. A belt of stronger mid-level winds will exist across the northern tier states with a low-amplitude shortwave trough moving through the Northwest. A surface trough will deepen in the lee of the northern Rockies. ...Columbia Basin into the northern Great Basin... Offshore high pressure and the deepening trough to the east will promote modestly strong westerly winds across the Cascades. Winds in the Columbia Basin will reach 15-20 mph with perhaps higher speeds within some of the Cascade gaps. RH of 15-20% is possible by the afternoon. In the northern Great Basin, surface winds of 15-20 mph are possible with RH falling into the 10-20% range. Stronger winds are possible in the Snake River Plain as mid-level winds will be stronger and better aligned with the terrain. There, up to 25 mph winds will be possible for a short duration. ..Wendt.. 07/19/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1238 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...Synopsis... Upper-level ridging will persist across much of the southern half of the U.S. today. A weak upper-level low will be positioned over southern California into northern Baja. A belt of stronger mid-level winds will exist across the northern tier states with a low-amplitude shortwave trough moving through the Northwest. A surface trough will deepen in the lee of the northern Rockies. ...Columbia Basin into the northern Great Basin... Offshore high pressure and the deepening trough to the east will promote modestly strong westerly winds across the Cascades. Winds in the Columbia Basin will reach 15-20 mph with perhaps higher speeds within some of the Cascade gaps. RH of 15-20% is possible by the afternoon. In the northern Great Basin, surface winds of 15-20 mph are possible with RH falling into the 10-20% range. Stronger winds are possible in the Snake River Plain as mid-level winds will be stronger and better aligned with the terrain. There, up to 25 mph winds will be possible for a short duration. ..Wendt.. 07/19/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1238 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...Synopsis... Upper-level ridging will persist across much of the southern half of the U.S. today. A weak upper-level low will be positioned over southern California into northern Baja. A belt of stronger mid-level winds will exist across the northern tier states with a low-amplitude shortwave trough moving through the Northwest. A surface trough will deepen in the lee of the northern Rockies. ...Columbia Basin into the northern Great Basin... Offshore high pressure and the deepening trough to the east will promote modestly strong westerly winds across the Cascades. Winds in the Columbia Basin will reach 15-20 mph with perhaps higher speeds within some of the Cascade gaps. RH of 15-20% is possible by the afternoon. In the northern Great Basin, surface winds of 15-20 mph are possible with RH falling into the 10-20% range. Stronger winds are possible in the Snake River Plain as mid-level winds will be stronger and better aligned with the terrain. There, up to 25 mph winds will be possible for a short duration. ..Wendt.. 07/19/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1238 AM CDT Sat Jul 19 2025 Valid 191200Z - 201200Z ...Synopsis... Upper-level ridging will persist across much of the southern half of the U.S. today. A weak upper-level low will be positioned over southern California into northern Baja. A belt of stronger mid-level winds will exist across the northern tier states with a low-amplitude shortwave trough moving through the Northwest. A surface trough will deepen in the lee of the northern Rockies. ...Columbia Basin into the northern Great Basin... Offshore high pressure and the deepening trough to the east will promote modestly strong westerly winds across the Cascades. Winds in the Columbia Basin will reach 15-20 mph with perhaps higher speeds within some of the Cascade gaps. RH of 15-20% is possible by the afternoon. In the northern Great Basin, surface winds of 15-20 mph are possible with RH falling into the 10-20% range. Stronger winds are possible in the Snake River Plain as mid-level winds will be stronger and better aligned with the terrain. There, up to 25 mph winds will be possible for a short duration. ..Wendt.. 07/19/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more