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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).

Thursday, September 30, 2021

SPC Sep 30, 2021 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0157 AM CDT Thu Sep 30 2021 Valid 021200Z - 031200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Saturday. ...Synopsis... A shortwave trough over the central Plains will develop eastward toward the MS Valley on Saturday. Southerly low-level flow will maintain a moist boundary layer from the south-central U.S. toward the upper Great Lakes ahead of a southeastward-advancing cold front. Ahead of the front in a persistent warm advection regime, areas of showers and thunderstorms, along with widespread cloudiness are expected throughout the period. A lack of stronger heating ahead of the front, coupled with poor midlevel lapse rates, will limit instability. Generally weak deep-layer flow and modest vertical shear will further preclude severe potential. ..Leitman.. 09/30/2021 Read more LIVE: spc.noaa.gov
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