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SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Mon Aug 18 2025 Valid 181630Z - 191200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN WI AND NORTHERN IL...AND ACROSS PORTIONS OF THE NORTHERN AND CENTRAL PLAINS... ...SUMMARY... Strong to severe storms capable of damaging winds are possible in parts of the Midwest today. Widely scattered storms with large hail and severe winds are possible in parts of the central/northern Plains through tonight. ...Mid MS Valley... Extensive outflow from last night's MCS currently extends from extreme southwest WI southwestward through eastern IA and north-central MO into eastern KS. This outflow has been moving quickly eastward/southeastward this morning, and this trend is expected to continue, although some slowing of its progression speed is possible over time. The downstream airmass across from southern WI and IL is characterized by dewpoints in the low to mid 70s. Mid-level lapse rates are generally poor across the region, but heating of this very moist airmass will still result in strong to very strong buoyancy (i.e. MLCAPE around 3000 J/kg) by late afternoon. Strong to severe storms are possible along this outflow as it impinges on this moist and buoyant airmass. Current trends suggest the greatest severe potential will exist this afternoon across southern WI and northern IL, where slightly stronger mid-level flow, backed surface winds, and an east-west baroclinic zone exists. Recently issued MCD 1983 addresses the short-term severe potential for this area. ...Central High Plains into the northern/central Plains... Strong heating and ample low/mid level moisture will promote the development of scattered thunderstorms by mid-afternoon over the foothills and plains of central/eastern CO. Additional isolated storms are possible farther north across western NE into the Black Hills region. Much of this area is within a corridor of modest mid-level flow on the northern periphery of the upper ridging covering the southern CONUS. Resulting modest shear may be enough for hail production with the initial development before these high-based storms trend towards outflow-dominant structures with time. These storms may persist into the evening, with an attendant threat for strong to severe gusts progressing into central NE before weakening. ...MO/AR... Clear skies and strong diurnal heating are expected across central/southern MO and much of AR. Temperatures in the upper 90s are expected, with dewpoints remaining in the mid 60s despite strong mixing. These hot and humid conditions will result in strong buoyancy this afternoon, with most guidance suggesting MLCAPE around 2000 J/kg. Shear will be weak, yielding mostly disorganized multicells, but the strongest storms will be capable of locally damaging wind gusts. ..Mosier/Wendt.. 08/18/2025 Read more

No watches are valid as of Mon Aug 18 16:34:02 UTC 2025.

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...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 1011 AM CDT Mon Aug 18 2025 Valid 181700Z - 191200Z ...NO CRITICAL AREAS... Minimum RH near and below 10% with very poor RH recovery overnight is expected from central Nevada through the West Slope and into northwest Arizona and southeast California resulting in long burning periods. The forecast remains on track, and please see the previous discussion for more details. ..Nauslar.. 08/18/2025 .PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/ ...Synopsis... As upper-level ridging builds rapidly over the West, modest south-southwest deep layer flow and efficient daytime mixing of a deep/dry boundary layer will support sustained south-southwest winds of 10-12 mph across southern/northern NV this afternoon. Winds combined with relative humidity nearing 10 percent will support short duration and localized elevated fire weather conditions across southern, central and northeastern NV where very dry fuels exist. ...Northern Rockies/Central Idaho Mountains... A mid-level trough will persist over the Northwest on the periphery of the building upper ridge. Residual Pacific/monsoon moisture and daytime heating will result in isolated showers and thunderstorms across northern ID and higher terrain of western MT. Although northeast thunderstorm motions of 25-30 knots will limit rainfall, fuels remain mostly non-receptive to new lightning ignitions across the Northern Rockies, precluding introduction of dry thunderstorm highlights. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

A cannabis grower in South Hero noted that the hot, dry days have lessened the need to prune the crop and the plants were growing faster. While the farm does have irrigation, rainfall was the main source of moisture for the plants. Some strains of cannabis appeared to be stressed for lack of water. WPTZ NBC5 Burlington (Vt.), Aug 15, 2025

A Cumberland County farmer has run his irrigation system almost daily since mid-July, which is a large additional expense while the yield was looking to be smaller than usual. Irrigating is also a lot of extra work for the farmer. WMTW-TV ABC 8 (Portland, Maine), Aug 14, 2025

A Yakima County dairy farmer was concerned about irrigation water as the Roza Irrigation District was providing just 42% of a full allotment in 2025. Snow melted quickly in the spring. The farmer opted to leave about a third of his land unplanted due to the lack of water. Consequently, he has to purchase more feed for his cattle. Area reservoirs were near record lows. KREM-TV CBS 2 (Spokane, Wash.), Aug 14, 2025