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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.


Friday, November 19, 2021

SPC Nov 19, 2021 0830 UTC Day 3 Severe Thunderstorm Outlook

SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0132 AM CST Fri Nov 19 2021 Valid 211200Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Sunday. ...Synopsis... Overall upper pattern is forecast to amplify throughout the day on Sunday as a pair of shortwave troughs moving through the central eastern CONUS lead to a deepening of the parent upper trough and upper ridging moves across CA into the Great Basin. By early Monday morning, expansive upper troughing will likely extend from the Hudson Bay to the central Gulf Coast, with cyclonic flow throughout this trough covering much of the central and eastern CONUS. At the same time, upper ridging will likely extend from the Great Basin to the central British Columbia/Alberta border. The lead shortwave trough within the deepening parent upper trough is expected to move eastward from the central Plains through the Mid MS and Lower/Middle OH Valleys. An associated surface low will track northeastward just ahead of this shortwave, moving from south-central OK/north TX northeastward through the TN Valley. Cold front attendant to this low will sweep southeastward across the southern Plains and Lower MS Valley, and a few afternoon thunderstorms are possible in the vicinity of this front from the middle TX Coast into west-central LA. Farther east, a few sea-breeze thunderstorms are possible across central and southern FL Sunday afternoon. Additionally, showers and thunderstorms will likely increase across the Gulf Stream within the warm sector ahead of the approaching shortwave trough and cold front. Much of this activity will remain offshore but a few flashes are possible over the NC Outer Banks. ..Mosier.. 11/19/2021 Read more LIVE:
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)