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Cardinal SAT


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 16, 2021

SPC Jun 16, 2021 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0319 AM CDT Wed Jun 16 2021 Valid 191200Z - 241200Z ...DISCUSSION... A shortwave trough will continue eastward across the northeastern states on Saturday/D4 with a surface low over Quebec. Strong westerly winds aloft will push the surface cold front rapidly east across New England during the day, with thunderstorms likely. Predictability issues exist for Saturday/D4, as there are forecast to be morning storms which may stabilize parts of the area. In addition, timing differences exist regarding the speed of the cold front. Probabilities for severe may be added in later updates as predictability warrants. For Sunday/D5 through Monday/D6, there appears to be severe potential over parts of the northern Plains and upper MS Valley, as a large upper trough amplifies over the Plains and Great Lakes. There is significant model spread regarding this trough, thus predictability is too low to introduce severe probabilities. However, risk areas will be possible in later outlooks as models come into better alignment. The trough will have an expansive wind field aloft, and there may be a deepening surface low as well, supporting an organized severe threat. Read more LIVE: spc.noaa.gov