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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.

Friday, September 16, 2022

SPC Sep 17, 2022 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0745 PM CDT Fri Sep 16 2022 Valid 170100Z - 171200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL PLAINS THIS EVENING... ...SUMMARY... Scattered strong/severe thunderstorms will spread across portions of the central Plains this evening. ...01z Update... Mid-level short-wave trough has advanced across the Great Basin into WY early this evening with an associated 500mb speed max translating across northern CO toward southwestern NE. While strong boundary-layer heating contributed to convective initiation, large-scale forcing ahead of the short wave appears to be aiding upscale growth which currently arcs from south central SD-central NE-extreme northeast CO. This activity is propagating east within a corridor of modest instability and focused low-level warm advection. Latest model guidance suggests LLJ will strengthen across KS into south-central NE later this evening, suggesting this corridor of storms may linger with some intensity for several hours. Large hail and isolated severe wind gusts remain possible with these storms. Reference MCD #1787 for more information. ..Darrow.. 09/17/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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