Tag: utc

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0642 AM CST Mon Dec 23 2024 Valid 231300Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight across the contiguous United States. ...Synopsis... Water-vapor imagery this morning shows a mid-level trough over AZ moving east and a northern stream trough over the Pacific Northwest. The northern mid-level trough will latitudinally expand southward into the central Rockies/south-central High Plains as a ridge amplifies over the Interior West in its wake. As this occurs, a partial phasing of mid-level trough

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0656 PM CST Sun Dec 22 2024 Valid 230100Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...Synopsis... An upper trough currently exists along the coastal Pacific Northwest this evening, and height rises will occur tonight as the wave moves northeastward across OR and WA. In the near term, a few thunderstorms will remain possible over coastal northern CA, and farther north across western WA beneath the cooler air aloft. Most of the

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0700 AM CST Sun Dec 22 2024 Valid 221300Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...Synopsis... Water-vapor imagery this morning shows an upper trough over the eastern Pacific to the west of the Pacific Northwest coast. This upper feature will move east-northeast into British Columbia and WA/OR tonight. Cooling midlevel temperatures will result in weak buoyancy (100-200 J/kg MUCAPE) late today into tonight from portions of northern CA northward along the