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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.


Monday, November 28, 2022

SPC Nov 28, 2022 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1124 PM CST Sun Nov 27 2022 Valid 281200Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized thunderstorms are not expected today. ...Synopsis... A mid-level trough will deepen across the Interior West while a surface low begins to develop across the Plains states today. Very cold mid-level temperatures (-30C to -40C at 500 mb) will overspread portions of the Pacific Northwest into northern parts of the Great Basin through the period. While buoyancy should remain scant across the Interior West, the very cold temperatures aloft may promote a lightning flash or two if any above-freezing parcels can be lifted to their LFC, introducing both liquid and ice species in the cloud-bearing layer. Gulf of Mexico moisture should gradually advect northward in response to surface lee troughing across portions of the Southern Plains into the Lower MS Valley, particularly towards the later half of the period. However, negligible upper support and lack of buoyancy should limit organized thunderstorm potential up to 12Z Tuesday. ..Squitieri/Darrow.. 11/28/2022 Read more CHECK UPDATE ZOOM GRAPHIC
SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)