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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, September 29, 2021

SPC Sep 29, 2021 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0135 AM CDT Wed Sep 29 2021 Valid 011200Z - 021200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Friday. ...Synopsis... The upper low/trough over AZ/NM will slowly migrate northeast toward the central/southern High Plains on Friday. Meanwhile, the larger-scale upper flow pattern across the west will weaken and become generally westerly. A ridge over the Midwest and Southeast will weaken while an upper low persists across the Northeast. Low-level warm advection across the southern Plains toward the MS Valley will aid in areas of heavy rain and thunderstorms ahead of a nearly stationary cold front positioned from the Upper Midwest into the southern Plains. Modest instability/shear and poor lapse rates will preclude severe potential. ..Leitman.. 09/29/2021 Read more LIVE: spc.noaa.gov