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Archives for Chicago's hourly weather data updated 24-48 hours after end of each day. MOBILE CHGOWX.COM ...
Weather conditions on bar directly above are near Lakefront. Weather conditions with Moon are O'Hare (official).

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
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