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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, November 22, 2021

SPC Nov 22, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1023 AM CST Mon Nov 22 2021 Valid 221630Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected across the contiguous United States today. ...Synopsis/Discussion... A progressive yet amplified longwave pattern will prevail over the CONUS through tonight. Large-scale trough amplification will occur along/east of the Appalachians, while an additional shortwave trough amplifies as it approaches the coastal Pacific Northwest tonight. Some thunderstorms will remain a possibility across southern Florida and offshore waters today within the pre-frontal moist air mass. A few thunderstorms may also occur late tonight along coastal Washington/northwest Oregon as lapse rates steepen/minimal buoyancy develops in conjunction with the aforementioned shortwave trough. ..Guyer/Weinman.. 11/22/2021 Read more LIVE: spc.noaa.gov
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