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SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1124 AM CST Tue Jan 21 2025 Valid 221200Z - 231200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Wednesday. ...Synopsis... A deep mid/upper-level trough will remain in place over most of the CONUS on Wednesday. Anomalously cold conditions are expected from the Great Plains to the Eastern Seaboard, in the wake of a strong cold front. Weak MUCAPE may persist across far south FL and the Keys very early in the forecast period, but deep convection appears unlikely due to warm temperatures aloft and decreasing large-scale ascent with time. Elsewhere, dry and stable conditions will limit thunderstorm potential. ..Dean.. 01/21/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1124 AM CST Tue Jan 21 2025 Valid 221200Z - 231200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Wednesday. ...Synopsis... A deep mid/upper-level trough will remain in place over most of the CONUS on Wednesday. Anomalously cold conditions are expected from the Great Plains to the Eastern Seaboard, in the wake of a strong cold front. Weak MUCAPE may persist across far south FL and the Keys very early in the forecast period, but deep convection appears unlikely due to warm temperatures aloft and decreasing large-scale ascent with time. Elsewhere, dry and stable conditions will limit thunderstorm potential. ..Dean.. 01/21/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1124 AM CST Tue Jan 21 2025 Valid 221200Z - 231200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Wednesday. ...Synopsis... A deep mid/upper-level trough will remain in place over most of the CONUS on Wednesday. Anomalously cold conditions are expected from the Great Plains to the Eastern Seaboard, in the wake of a strong cold front. Weak MUCAPE may persist across far south FL and the Keys very early in the forecast period, but deep convection appears unlikely due to warm temperatures aloft and decreasing large-scale ascent with time. Elsewhere, dry and stable conditions will limit thunderstorm potential. ..Dean.. 01/21/2025 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1124 AM CST Tue Jan 21 2025 Valid 221200Z - 231200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Wednesday. ...Synopsis... A deep mid/upper-level trough will remain in place over most of the CONUS on Wednesday. Anomalously cold conditions are expected from the Great Plains to the Eastern Seaboard, in the wake of a strong cold front. Weak MUCAPE may persist across far south FL and the Keys very early in the forecast period, but deep convection appears unlikely due to warm temperatures aloft and decreasing large-scale ascent with time. Elsewhere, dry and stable conditions will limit thunderstorm potential. ..Dean.. 01/21/2025 Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...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 1100 AM CST Tue Jan 21 2025 Valid 211700Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SAN JACINTO TO LAGUNA MOUNTAIN RANGES... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor changes were made to the Extremely Critical highlights in Los Angeles County and Ventura County -- based on the latest surface observations and high-resolution guidance. The offshore pressure gradient should be peaking over the next few hours (latest LAX-DAG gradient around -6.5 mb), and this will be the period of strongest offshore winds and potential for extremely critical conditions. Thereafter, critical conditions should persist into this evening, when an overall decrease in the pressure gradient and surface winds is expected. ..Weinman.. 01/21/2025 .PREV DISCUSSION... /ISSUED 0156 AM CST Tue Jan 21 2025/ ...Synopsis... A mid-level trough across the southwest U.S. will rapidly track eastward toward the Southeast while surface high pressure persists over the Great Basin through the period. Strong offshore flow will persist from the Ventura Valley to the Laguna Mountains, with widespread 20-30 mph sustained winds and 10 percent RH expected during the day into early Wednesday morning, warranting the maintenance of Critical highlights across much of the far southern California shoreline. Furthermore, the latest high-resolution guidance consensus shows sustained winds exceeding 40 mph, coinciding with single-digit RH, from the Ventura Valley to the San Bernardino Mountains, as well as the San Jacinto to Laguna Mountain ranges, where Extremely Critical highlights were maintained. The best chance for Extremely Critical conditions will be during the morning into early afternoon hours. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1012 AM CST Tue Jan 21 2025 Valid 211630Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Expansive high pressure associated with a polar airmass is in place across is in place east of Rockies. This high, which is currently centered over eastern OK/western AR, is expected to shift eastward/northeastward throughout the day, ending the period over the Ohio Valley. Associated cold, dry, and stable conditions will preclude thunderstorm development. A similar environment is anticipated across the western CONUS, with high pressure and associated stability dominating the sensible weather. A deepening surface low will continue to shift eastward across the Gulf of Mexico, with strong warm-air advection throughout its warm sector contributing to a broad precipitation field across the Gulf Coast. A few lightning flashes were observed over Acadia Parish in south-central LA over the past hour, but these flashes were most likely created by the self-initiated upward leader process. Given the continuing windy conditions and potential for mixed-phase hydrometeors at low levels, some additional self-initiated flashes are possible throughout the period. ..Mosier/Thornton.. 01/21/2025 Read more