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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, June 15, 2022

SPC Jun 15, 2022 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0344 AM CDT Wed Jun 15 2022 Valid 181200Z - 231200Z ...DISCUSSION... Medium-range guidance remains in good agreement that a highly amplified upper ridge will remain over much of the central CONUS and Canada this upcoming weekend while moving slowly eastward. Across the western states, an elongated upper trough should also advance slowly eastward, reaching the northern/central Rockies and adjacent High Plains by Day 6/Monday. Low-level moisture will attempt to return northward across parts of the northern Plains from Day 4/Saturday into Day 5/Sunday. However, a stout cap will probably limit overall thunderstorm coverage, and confidence that severe convection will form in this time frame remains low. The upper trough should eject across the northern Plains into central Canada around Day 6/Monday into Day 7/Tuesday. Depending on the track of this feature and the quality of low-level moisture return, some severe threat may exist across parts of the northern Plains into the Upper Midwest early next week. However, too much uncertainty currently exists in the placement/evolution of the upper trough and related surface features to include severe probabilities at this extended time frame. Read more CHECK UPDATE ZOOM GRAPHIC
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