SPC Dec 21, 2024 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0644 PM CST Fri Dec 20 2024 Valid 210100Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible along the northern California coast early morning Saturday. ...Northern CA coast... An amplified upper trough will move northeast and approach the Pacific Northwest coast through 12Z Saturday. This will yield a pronounced low-level warm conveyor to overspread the adjacent offshore waters. This forcing for ascent in conjunction with an ample buoyancy plume has supported scattered to widespread thunderstorms around 500-600 miles offshore. This buoyancy
Hydrologic Outlook issued December 19 at 8:53PM PST by NWS San Francisco CA
ESFMTR AN ACTIVE STORM TRACK ACROSS NORTHERN CALIFORNIA WILL BRING MODERATE RAINFALL AND AN INCREASED POTENTIAL FOR RAPID RIVER RISES ON NORTH BAY CREEKS AND STREAMS * WHATThe storm door is wide open with a very active storm track forecast to impact Northern California. Wet and unsettled weather will bring periods of light to moderate rainfall to the region with the biggest impact expected over the North Bay. The first couple of storms that are forecast to move across the North Bay Saturday and again on Sunday, will likely prime the soils resulting in quicker and more noteworthy rises of
SPC Dec 20, 2024 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0644 AM CST Fri Dec 20 2024 Valid 201300Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe weather is not forecast across the contiguous United States through tonight. ...Synopsis... Water-vapor imagery this morning shows an upper trough centered over the Great Lakes, with this feature forecast to move east into the Northeast and east of the Mid-Atlantic states by late tonight. Farther west, a mid-level ridge will reside over the Rockies with an upper trough over the eastern Pacific approaching the northern CA/Pacific Northwest
SPC Dec 20, 2024 Day 4-8 Severe Weather Outlook
Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0304 AM CST Fri Dec 20 2024 Valid 231200Z - 281200Z ...DISCUSSION... A more active southern-stream pattern should evolve next week, with several lower latitude troughs crossing the southern tier along with some northward increase in low-level moisture across parts of Texas to the Lower Mississippi Valley and Gulf Coast. One such shortwave trough should influence increasing thunderstorm potential across east/southeast Texas on Tuesday/Day 5. Some severe risk could materialize, but it appears that overall buoyancy will be weak with the severe potential currently expected to be
SPC Dec 20, 2024 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0650 PM CST Thu Dec 19 2024 Valid 200100Z - 201200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected tonight. ..Grams.. 12/20/2024 Read more
SPC Dec 19, 2024 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0636 AM CST Thu Dec 19 2024 Valid 191300Z - 201200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected through tonight. ...Synopsis/Discussion... The upper-tropospheric pattern is evolving back to an eastern mean trough and western ridge for a few days, as a series of shortwave troughs dig southeastward from the northern/central Plains and upstream parts of western/central Canada. Low-level cold frontal passage related to the eastern troughing will render the airmass east of the Rockies too dry and/or stable for thunderstorms over land for
SPC Dec 19, 2024 Day 4-8 Severe Weather Outlook
Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0245 AM CST Thu Dec 19 2024 Valid 221200Z - 271200Z ...DISCUSSION... Strong surface high pressure and a dearth of boundary-layer moisture will limit thunderstorm potential on Day 4/Sun. Starting Day 5/Mon, a progressive upper level pattern is forecast, and a series of shortwave trough will migrate across the Plains to the Midwest. As this occurs, surface lee troughing will support south/southeasterly low-level flow across the southern Plains and the Gulf of Mexico. Modest boundary-layer moisture will being to return northward across TX toward OK by early
SPC Dec 19, 2024 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0646 PM CST Wed Dec 18 2024 Valid 190100Z - 191200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms will largely diminish across the Southeast tonight. ...Southeast... Isolated thunderstorms persist across parts of the Carolinas into the FL Panhandle, and separately over the south FL Peninsula. Within a weakly buoyant warm-moist sector ahead of this activity, overall convective potential will generally diminish. This will occur more rapidly overnight as large-scale ascent weakens/shifts off the South Atlantic Coast. Thunderstorms will be relegated to the Gulf Stream during
Hydrologic Outlook issued December 18 at 3:36AM PST by NWS Seattle WA
ESFSEW An atmospheric river has brought 2 to 4 inches of precipitation across the Cascades of Snohomish County northwards over the last 24 hours. This has led to a rise in area rivers. However, river flooding is not expected for Whatcom, Skagit, and King Counties from this event. Although river flooding is not expected for Snohomish County, the Stillaguamish River continues to rise rapidly this morning due to 1 to 2 inches of precipitation over the last 6 hours in the Stillaguamish basin and vicinity. For this reason, the Hydrologic Outlook remains for Snohomish County. However, current river forecasts keep
SPC Dec 18, 2024 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0651 AM CST Wed Dec 18 2024 Valid 181300Z - 191200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE TENNESSEE VALLEY REGION... ...SUMMARY... Isolated damaging wind gusts and a brief tornado are possible into early afternoon across parts of the Tennessee Valley region. ...Synopsis... A continuing progressive pattern aloft will be dominated by two main shortwave troughs: a trailing perturbation now over the coastal Pacific Northwest, and a positively tilted one apparent in moisture- channel imagery near a DBQ-STJ-P28-DHT axis. The