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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 17, 2021

SPC Sep 17, 2021 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0257 PM CDT Fri Sep 17 2021 Valid 172000Z - 181200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER A PORTION OF THE SOUTHERN HIGH PLAINS... ...SUMMARY... A few strong to locally severe storms with gusty winds may occur across the southern High Plains this afternoon into early evening. ...Discussion... Only minor adjustments have been made to previous forecast. ..Dial.. 09/17/2021 .PREV DISCUSSION... /ISSUED 1104 AM CDT Fri Sep 17 2021/ ...KS/OK/TX... No changes have been made to the ongoing forecast. Scattered thunderstorms are expected to develop this afternoon along and ahead of a cold front moving southeastward into parts of western KS/OK and the TX Panhandle. Full sunshine in this region will yield steep low-level lapse rates and a deeply mixed boundary layer. Sufficient CAPE will pose a risk of locally damaging wind gusts in the strongest cells for a few hours early this evening. Elsewhere, an isolated strong storm or two capable of gusty winds is possible this afternoon over MS, and over southern AZ. However, the risk in both areas appears too low to warrant inclusion of a 5% wind risk. Read more LIVE: spc.noaa.gov
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