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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.

Saturday, May 28, 2022

SPC May 28, 2022 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0351 AM CDT Sat May 28 2022 Valid 311200Z - 051200Z ...DISCUSSION... Medium-range model guidance indicates the upper-air pattern will transition from a trough in the West and ridge in the East to a lower-amplitude/more-progressive flow pattern. A risk for severe thunderstorms will probably exist on the southern fringe of the stronger westerlies and where the composite boundary becomes situated over the central/southern Great Plains into the mid MS Valley on Tuesday (day 4). Large CAPE and adequate shear for organized storm modes lend confidence in this scenario for severe. By Wednesday (day 5), model variability increases in the timing/placement of a disturbance currently projected to move across the central U.S. as the pattern deamplifies. The latter part of the extended period is characterized by lower potential for severe and less predictability. Read more CHECK UPDATE ZOOM GRAPHIC
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