Tag: utc

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1025 AM CST Tue Dec 31 2024 Valid 311630Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING FROM EASTERN KENTUCKY INTO THE MID ATLANTIC REGION.... ...SUMMARY... Damaging to isolated marginally severe gusts, isolated large hail, and a brief tornado are possible today from the central Appalachians to parts of the Mid-Atlantic. ...KY to the Mid Atlantic Region... A potent, negatively-tilted shortwave trough will move from the upper OH Valley into NY/PA today, with an associated 80-100 knot mid-level speed

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0657 AM CST Tue Dec 31 2024 Valid 311300Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL APPALACHIANS TO PARTS OF THE MID-ATLANTIC... ...SUMMARY... Damaging to isolated marginally severe gusts, isolated large hail, and possibly a brief tornado, are possible today from the central Appalachians to parts of the Mid-Atlantic. ...Synopsis... In mid/upper levels, a progressive shortwave pattern will persist within a broadly cyclonic flow field covering much of the CONUS from the Rockies eastward. The most important of these

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0656 PM CST Mon Dec 30 2024 Valid 310100Z - 311200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible tonight in parts of the mid Mississippi and lower Ohio Valleys, but no severe threat is expected. ...DISCUSSION... A shortwave trough, evident on water vapor imagery over the central U.S., will move eastward across the mid Mississippi Valley tonight. Isolated thunderstorm development is expected after midnight ahead of the trough over parts of the mid Mississippi and lower Ohio Valleys, where surface dewpoints

SPC 1730Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1107 AM CST Mon Dec 30 2024 Valid 311200Z - 011200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible from the Outer Banks into southern New England late Tuesday into early Wednesday. Severe thunderstorms are not expected. ...Synopsis... An upper trough will pivot northeast from the Midwest toward the Mid-Atlantic/Northeast on Tuesday. A prior cold frontal passage across this region will result in limited boundary-layer moisture despite increasing low-level south/southeasterly flow ahead of a surface low. The exception will be along the immediate

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1022 AM CST Mon Dec 30 2024 Valid 301630Z - 311200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected through tonight. ...OH Valley tonight... An 80-100 knot mid-level jet max will move quickly eastward across the central Plains today, and into the mid MS Valley tonight. Strong cyclogenesis will occur in advance of this system over MO/IL, with the primary baroclinic zone sweeping across AR into KY/TN. Strengthening southerly low-level winds in the warm sector of the deepening low will result in