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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.

Tuesday, August 3, 2021

SPC Aug 3, 2021 0600 UTC Day 2 Convective Outlook

SPC 0600Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1217 AM CDT Tue Aug 03 2021 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The threat for severe storms appears low across the USA on Wednesday. ...Synopsis and Discussion... A weakening upper low will drift northeast across KY and OH on Wednesday, with 20-30 kt cyclonic 500 mb flow from the Deep South into the Mid Atlantic. Midlevel temperatures will remain relatively cool from the OH Valley into the Appalachians, with warming aloft from the lower MS Valley across the Gulf Coast. Meanwhile, an upper high will remain over the Mojave Desert, with a ridge extending north into MT. A shortwave trough over the Pacific Ocean will move ashore across northern CA and OR by early Thursday morning, with cooling aloft and 40-45 kt midlevel winds. Strong heating will steepen lapse rates over the West, and a weak low over eastern OR may provide a focus for a few high-based storms capable of gusty winds or small hail. Elsewhere, a front will remain nearly stationary from the TX and northern Gulf Coast to the coastal Carolinas where several bouts of rain and storms are expected with 70s F dewpoints. Shear will remain weak and heating minimal across the Southeast, thus severe weather is not expected. ..Jewell.. 08/03/2021 Read more LIVE: spc.noaa.gov