SPC Jan 22, 2025 0830 UTC Day 3 Severe Thunderstorm Outlook
SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0125 AM CST Wed Jan 22 2025 Valid 241200Z - 251200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast for Friday. ...Synopsis... On Friday, an upper trough will extend from the Great Lakes southwestward into TX, with strong southwest flow aloft from across the Southeast. This trough will be progressive and move off the East Coast by early Saturday, allowing for rising heights/warming aloft across much of the CONUS. Meanwhile, another upper trough will develop southward into parts of the northwestern states. At the
SPC Jan 22, 2025 0700 UTC Day 2 Convective Outlook
SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1147 PM CST Tue Jan 21 2025 Valid 231200Z - 241200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast on Thursday. ...Synopsis... A cool and stable pattern will persist on Thursday across the CONUS, with a sprawling area of high pressure stretching from the Great Basin to the East Coast. An elongated, positive-tilt upper trough will extend from Quebec southwestward across the Great Lakes and into the southern High Plains by 00Z, and will move toward the MS Valley into Friday morning. Given high
SPC – No watches are valid as of Tue Jan 21 21:16:02 UTC 2025
No watches are valid as of Tue Jan 21 21:16:02 UTC 2025.
SPC MD 49
MD 0049 CONCERNING HEAVY SNOW FOR SOUTHERN JEFFERSON AND NORTHERN LEWIS COUNTIES DOWNSTREAM OF LAKE ONTARIO Mesoscale Discussion 0049 NWS Storm Prediction Center Norman OK 1028 AM CST Tue Jan 21 2025 Areas affected...Southern Jefferson and northern Lewis counties downstream of Lake Ontario Concerning...Heavy snow Valid 211628Z - 212230Z SUMMARY...Heavy lake-effect snow to continue downstream of Lake Ontario to continue for another 10 to 12 hours. Snowfall rates of 2+ inches per hour expected. DISCUSSION...A strong lake-effect snow band which developed yesterday evening and slowly shifted north has now stalled over the same location since around 10Z this morning with
SPC MD 50
MD 0050 CONCERNING HEAVY SNOW FOR SOUTHERN MISSISSIPPI...SOUTHERN ALABAMA...AND THE WESTERN FLORIDA PANHANDLE Mesoscale Discussion 0050 NWS Storm Prediction Center Norman OK 0203 PM CST Tue Jan 21 2025 Areas affected...southern Mississippi...southern Alabama...and the western Florida Panhandle Concerning...Heavy snow Valid 212003Z - 212300Z SUMMARY...Moderate to heavy snow will continue through the afternoon. DISCUSSION...A broad area of snow continues to shift east and northeast into portions of southern Alabama and the Florida Panhandle from Louisiana/southern Mississippi. Occasional sleet and freezing rain reports have occurred across the coast, but the main precipitation type has become snow area wide. Enhanced upper-level flow and
SPC Jan 21, 2025 2000 UTC Day 1 Convective Outlook
SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0132 PM CST Tue Jan 21 2025 Valid 212000Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. through tonight. ...20z... No changes were made. Widespread winter precipitation is ongoing along the Gulf Coast. High pressure over the interior of the central CONUS will continue to support very cold, dry and stable conditions with offshore flow. This will negate sufficient buoyancy for thunderstorm potential. See the prior outlook for more info. ..Lyons.. 01/21/2025 .PREV DISCUSSION... /ISSUED 1012 AM
SPC Jan 21, 2025 1930 UTC Day 3 Severe Thunderstorm Outlook
SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 1248 PM CST Tue Jan 21 2025 Valid 231200Z - 241200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast on Thursday. ...Synopsis... A large mid/upper-level trough will persist from the south-central Great Plains into the eastern CONUS on Thursday, as multiple embedded shortwaves move southeastward through the larger-scale trough. Generally dry and stable conditions in the wake of a significant cold intrusion should continue to limit thunderstorm potential through the period. ..Dean.. 01/21/2025 Read more
SPC Jan 21, 2025 1730 UTC Day 2 Convective Outlook
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
SPC – No watches are valid as of Tue Jan 21 08:16:01 UTC 2025
No watches are valid as of Tue Jan 21 08:16:01 UTC 2025.
SPC MD 45
MD 0045 CONCERNING HEAVY SNOW FOR PORTIONS OF FAR WESTERN NEW YORK Mesoscale Discussion 0045 NWS Storm Prediction Center Norman OK 1030 PM CST Mon Jan 20 2025 Areas affected...portions of far western New York Concerning...Heavy snow Valid 210430Z - 211030Z SUMMARY...At least 2-3 inch/hour snowfall rates should continue past sunrise with an intense lake-effect snow band. DISCUSSION...MRMS mosaic and KTYX radar imagery show an intense, steady-state lake-effect snow band persisting across Jefferson and Lewis Counties in far western NY. This snow-band is benefiting from an optimal fetch of moisture off of Lake Ontario, where 8+ C/km 0-3 km lapse