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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.

Wednesday, December 1, 2021

SPC Dec 1, 2021 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1119 PM CST Tue Nov 30 2021 Valid 011200Z - 021200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few lightning flashes may occur across the lower Ohio Valley late this morning into mid afternoon. ...Lower Ohio Valley... Strong short-wave trough is expected to dig across the mid-MS Valley into the lower OH valley by 18z before translating into the southern Appalachians and off the Southeast Coast by the end of the period. Large-sale forcing, and subsequent cooling/moistening mid levels, will contribute to weak buoyancy across the lower OH Valley region later this morning into mid afternoon despite weak moisture return. Forecast soundings suggest parcels lifted near 850mb could yield around 300 J/kg MUCAPE and weak warm advection ahead of the short wave should prove sufficient for weak convection. Strongest updrafts may produce a few flashes of lightning; however thunderstorms should remain mostly isolated. ..Darrow/Moore.. 12/01/2021 Read more LIVE: spc.noaa.gov
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