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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.


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:
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CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)