Tag: convective

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0632 AM CST Tue Feb 25 2025 Valid 251300Z - 261200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible from the northern and central Plains today into the Mid Mississippi Valley overnight. A few isolated thunderstorms are possible across western Colorado as well. Severe thunderstorms are not anticipated. ...Synopsis and Discussion... Early morning satellite imagery reveals an active northern stream, with one shortwave trough progressing through the Upper Great Lakes/OH Valley and another moving into the northern Rockies, downstream of a cyclone moving

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0644 PM CST Mon Feb 24 2025 Valid 250100Z - 251200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE PACIFIC NORTHWEST...AND OVER SOUTH FLORIDA... ...SUMMARY... Scattered storms remain possible across the Florida Keys/far southern Florida this evening. Localized damaging gusts or a brief tornado may occur. Isolated strong wind gusts are also possible across parts of the Pacific Northwest. ...01z Update... Strong 12hr mid-level height falls are spreading across the Pacific Northwest in response to a progressive trough that will advance

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0630 AM CST Mon Feb 24 2025 Valid 241300Z - 251200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER FAR SOUTHERN FL INCLUDING THE KEYS...AND OVER PARTS OF EASTERN OR AND WA... ...SUMMARY... Scattered strong storms will be possible across the Florida Keys and into far southern Florida from late afternoon through evening. Localized damaging gusts or a brief tornado may occur. Isolated strong winds are also expected from the Oregon Cascades into southeast Washington. ...Far Southern FL and the FL Keys... Shortwave trough

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0618 PM CST Sun Feb 23 2025 Valid 240100Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms remain possible this evening mainly over parts of eastern Louisiana and across Mississippi. ...Synopsis and Discussion... Scattered thunderstorms continue to be most prevalent over the northern and central Gulf, near the offshore surface low. A few lightning flashes were noted over parts of northern LA into MS, but in general, this activity should continue to wane as winds veer with the passing lead wave aloft. Elsewhere

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0638 AM CST Sun Feb 23 2025 Valid 231300Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are forecast across portions of Louisiana and immediate surrounding areas today. Additional isolated thunderstorms may occur in portions of Oregon/Washington. No severe weather is expected. ...Synopsis and Discussion... Satellite imagery shows a well-defined shortwave trough moving through the southern stream across TX. This shortwave is forecast to continue eastward throughout the day, progressing through the Lower MS Valley and ending the period over AL. Another shortwave trough

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0646 PM CST Sat Feb 22 2025 Valid 230100Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Scattered thunderstorms remain possible from the middle and upper Texas Coast toward the Sabine Valley late today and overnight. ...Discussion... Scattered thunderstorms are currently ongoing from southeast TX into the northwestern Gulf, well north of the surface front. Periodically strong storm cores have been noted, primarily offshore, with indications of small hail. Continued cooling aloft ahead of the shortwave trough moving across TX, as well as persistent southerly

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0630 AM CST Sat Feb 22 2025 Valid 221300Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Scattered thunderstorms remain possible from the middle and upper Texas Coast toward the Sabine Valley late today and overnight. A few storms could produce some small hail. ...Synopsis... Recent satellite imagery shows a pair of shortwave troughs progressing through the southern stream, with the lead wave moving through the Ozark Plateau and the second wave dropping through AZ towards northern Mexico. The lead wave is forecast to continue

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0618 PM CST Fri Feb 21 2025 Valid 220100Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms remain unlikely through tonight. ...Discussion... High pressure will remain situated over the majority of the CONUS through tonight, with any appreciable low-level moisture well offshore into the western Gulf. While a shortwave trough will move across AZ and NM tonight, loss of heating should minimize lapse rates and instability there. ..Jewell.. 02/22/2025 Read more

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0156 PM CST Fri Feb 21 2025 Valid 212000Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears very low across the U.S. today through tonight. ...20Z Update... A small cluster of elevated convection developed earlier today across the Brush Country region of south TX, with sporadic lightning flashes noted. This elevated convection was apparently driven by sufficient ascent/moistening near the base of the EML noted on the 12Z CRP sounding, and aided by a weak midlevel shortwave trough moving across the

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0631 AM CST Fri Feb 21 2025 Valid 211300Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Early morning surface analysis places the center of an expansive area of high pressure over MO. This area of high pressure (and its associated continental arctic airmass) is gradually expected to shift eastward throughout the day as shortwave trough progresses across the central Plains and into the Mid MS Valley. This evolution will maintain low-level offshore