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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, July 18, 2022

SPC Jul 18, 2022 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0326 AM CDT Mon Jul 18 2022 Valid 211200Z - 261200Z ...DISCUSSION... Medium-range models are in good agreement in the timing/placement of a progressive mid-level trough moving through the Northeast on Thursday (day 4). Rich low-level moisture will likely encompass the Northeast ahead of a front forecast to move through the region. Scattered to numerous thunderstorms are forecast with severe gusts possible in the more intense thunderstorm bands. By Friday (day 5), a mid-level ridge will be flattened over the southern U.S. A series of mid-level disturbances will likely traverse from west to east across the northern part of the Lower 48 during the middle to late part of the extended period. Uncertainty in the timing/location of disturbances precludes any additional severe highlights. Read more CHECK UPDATE ZOOM GRAPHIC
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