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Weather conditions on bar directly above are near Lakefront. Tabs under Moon Phases refer to O'Hare (official).

Archives for SPC Convective outlook are updated daily with a live map a the beginning of the article. Touch or click map to get possible update, and follow link at end of article for referral to NOAA/NWS Storm Prediction Center. Archives for Chicago's hourly weather data were updated 24-48 hours after end of each day prior to Dec. 2020.

Thursday, December 16, 2021

SPC Dec 16, 2021 0830 UTC Day 3 Severe Thunderstorm Outlook

SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0200 AM CST Thu Dec 16 2021 Valid 181200Z - 191200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... No severe thunderstorms are expected across the continental United States on Saturday or Saturday night. ...DISCUSSION... An upper-level trough will move eastward across the mid to upper Mississippi Valley and Ozarks on Saturday. At the surface, a cold front will advance southeastward across the Texas Coastal Plain, lower Mississippi Valley and central Gulf Coast states. Ahead of the front, weak instability is forecast to be in place by afternoon along the lower to middle Texas Coast, where thunderstorm development will be possible. Isolated thunderstorms may also develop along or near the front in the central Gulf Coast states during the afternoon. No severe threat is expected in these two areas mainly due to a lack of instability and large-scale ascent. ..Broyles.. 12/16/2021 Read more LIVE: spc.noaa.gov
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