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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 6, 2021

SPC Dec 6, 2021 0700 UTC Day 2 Convective Outlook

SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1210 AM CST Mon Dec 06 2021 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States on Tuesday. ...Synopsis and Discussion... Large-scale upper troughing will persist across much of the central/eastern CONUS on Tuesday as a lead wave ejects from New England northeastward over the Canadian Maritimes. Surface high pressure is expected to dominate much of the CONUS east of the Rockies as it slowly shifts eastward to the Atlantic Coast through the period. Due to a prior frontal passage, rich low-level moisture should remain confined to parts of the immediate Gulf Coast. Only very weak boundary-layer instability is forecast to develop across parts of north FL Tuesday afternoon, and the potential for robust thunderstorms appears low. However, some elevated convection may occur primarily Tuesday evening/night across parts of the Gulf Coast states as modest low-level warm/moist advection develops on the southern periphery of the amplifying upper trough. ..Gleason.. 12/06/2021 Read more LIVE: spc.noaa.gov
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