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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 29, 2021

SPC Nov 29, 2021 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1135 PM CST Sun Nov 28 2021 Valid 291200Z - 301200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the U.S. today or tonight. ...Synopsis/Discussion... Stable conditions and seasonally cool temperatures are expected to preclude thunderstorm development across the CONUS. A progressive and semi-amplified large-scale pattern will persist across the CONUS with a general prevalence of northwesterly flow aloft. A shortwave trough will spread east-southeastward over the Pacific Northwest and northern Rockies, while an additional clipper-type system influences the Upper Midwest and Great Lakes. In both cases, thermodynamic profiles are unlikely to be supportive of thunderstorms with this shallow convection. ..Guyer.. 11/29/2021 Read more LIVE: spc.noaa.gov
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