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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.

Sunday, December 26, 2021

SPC Dec 26, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1002 AM CST Sun Dec 26 2021 Valid 261630Z - 271200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible today over parts of the Pacific Coast States, eastern Great Basin to central Rockies, and parts of the Midwest. ...Pacific Northwest and Great Basin... Strong onshore flow and cold temperatures aloft are present once again today along the OR and northern CA coast. This will maintain the risk of isolated lightning flashes through the forecast period in this region. A few instances of lightning will also be possible in snow showers ahead of a cold front surging eastward across parts of UT/CO/WY. ...MS/OH Valleys... Low-level warm advection and lift is expected to intensify late this afternoon and early evening over parts of IA/MO/IL, resulting in isolated showers and thunderstorms. The strongest cells in this initial activity could produce small hail, but no severe storms are anticipated. Scattered thunderstorms will likely persist through the night and spread eastward into parts of IN/OH and Lower MI by Monday morning. ..Hart/Squitieri.. 12/26/2021 Read more LIVE: spc.noaa.gov
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