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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.

Monday, December 20, 2021

SPC Dec 20, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1030 AM CST Mon Dec 20 2021 Valid 201630Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected through tonight. ...Florida... Isolated thunderstorms will remain possible within a moist air mass near the east coast of Florida today. A southern-stream shortwave trough over Texas at midday will continue eastward toward the middle Gulf Coast and northern Gulf of Mexico through tonight. This system will influence the eastward persistence of storms over the Gulf of Mexico through tonight. Some of the thunderstorms could approach the Florida Keys and western Florida Peninsula tonight, but little severe potential is expected prior to 12Z Tuesday. ..Guyer.. 12/20/2021 Read more LIVE: spc.noaa.gov
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