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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.

ARLINGTON HEIGHTS WEATHER

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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SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)