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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.

Sunday, September 4, 2022

SPC Sep 5, 2022 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0729 PM CDT Sun Sep 04 2022 Valid 050100Z - 051200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM NORTHWEST ARIZONA INTO PARTS OF SOUTHERN CALIFORNIA... ...SUMMARY... A few strong wind gusts remain possible mainly from northwest Arizona into portions of southern California, and over parts of central Texas. ...Southern CA into northwest AZ... Isolated strong cells continue to move westward over the high terrain of northern Santa Barbara and Ventura counties, and this activity could produce strong wind gusts. The 00Z NKX sounding shows steep lapse rates aloft, which is aiding this convection across the uncapped elevated terrain. Otherwise, only weak levels of CAPE exist across the deserts. The greatest chance of isolated severe gusts appears to be with the cluster of cells moving off the mountains in northwest AZ, with a well-mixed boundary layer and PWAT to 1.25" downstream across the CO River. Small hail may occur as well as deep-layer shear is near 30 kt and may aid cellular storm mode. A gust of 65 kt was recently measured at Kingman AZ. The severe threat is expected to end in 1-2 hours as the low levels cool. ...East-central TX... Outflow associated with a complex of storms continues to push south toward central TX, with measured gusts generally in the 30-40 kt range over the last couple hours. While weak cooling aloft may persist this evening beneath the upper trough, the loss of heating should result in a weakening trend with this convection. ..Jewell.. 09/05/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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