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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.

Tuesday, January 4, 2022

SPC Jan 4, 2022 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1130 PM CST Mon Jan 03 2022 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are expected in portions of the Pacific Northwest today. ...Synopsis... A broad upper trough will overspread much of the CONUS today, with a strong northwesterly upper-level jet extending from the Pacific Northwest to the central Plains. A weak shortwave impulse will move onshore the WA/OR coast during the afternoon/evening in tandem with a surface low. Steep lapse rates through around 650 mb and cold temperatures beneath low equilibrium levels could support a few lightning flashes. Thunderstorms are not expected across the rest of the CONUS today/tonight. ..Leitman/Lyons.. 01/04/2022 Read more LIVE: spc.noaa.gov
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