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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, May 11, 2022

SPC May 11, 2022 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0227 AM CDT Wed May 11 2022 Valid 131200Z - 141200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM WISCONSIN TO OKLAHOMA... ...SUMMARY... Scattered afternoon and evening thunderstorms are expected from Wisconsin to the southern Plains, with isolated stronger storms becoming capable of damaging wind/hail production. ...Synopsis... An upper low shifting out of North Dakota at the start of the period will drift slowly/steadily northeastward across southern portions of Saskatchewan/Manitoba through the afternoon and evening. Meanwhile, a filling low will move northwestward across the Southeast/southern Appalachians. At the surface, a weakening cold front will drift southeastward across the Upper Midwest/Missouri Valley/southern Plains through the day. This front will focus diurnally driven, scattered to isolated convective development. ...Wisconsin to the southern Plains... While most of the large-scale ascent -- and accompanying stronger flow aloft -- shifts northeastward into Canada during the day, afternoon heating of a moist/unstable warm sector ahead of the weakening cold front will result in strong destabilization. With modest shear -- owing to southerly low-level winds beneath moderate mid-level flow -- supporting mainly multicells/weakly rotating supercells, hail/wind risk will likely manifest with a few stronger storms. Greatest risk will exist during the afternoon and evening, though storms may continue into the overnight hours. ..Goss.. 05/11/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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