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Weather conditions directly above are near Lakefront. Top tabs refer to O'Hare (official).

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 15, 2022

SPC Sep 16, 2022 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0739 PM CDT Thu Sep 15 2022 Valid 160100Z - 161200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL AND SOUTHERN PLAINS... ...SUMMARY... Isolated severe-thunderstorm gusts/hail remain possible this evening across portions of the central Plains and southern High Plains. ...01z Update... Scattered convection has developed ahead of a weak upper trough from the TX South Plains, across western KS/central NE into southeast SD. This activity has evolved within a modest zone of buoyancy where afternoon heating enhanced low-level lapse rates. While mid- high-level flow are decidedly weak, robust convection has at times generated hail in excess of 1 inch along with 50+kt gusts, especially from southwest KS into the TX South Plains. 00z soundings from this region support a narrow corridor of modest instability, primarily along/just east of the main lee surface trough. Over the next few hours, LLJ is forecast to increase across the southern/central Plains, ultimately focusing across the TX Panhandle into central KS by daybreak. This nocturnal influence may allow convection to linger well into the overnight hours, although updraft intensities should begin to wane as the boundary layer cools. ..Darrow.. 09/16/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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