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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 9, 2022

SPC Sep 9, 2022 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0250 PM CDT Fri Sep 09 2022 Valid 092000Z - 101200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHEAST AND UPPER GREAT LAKES... ...SUMMARY... Isolated marginally severe storms may occur across parts of the Southeast and Upper Great Lakes. ...20Z Update... Other than trimming low hail probabilities behind a cold front across WI and the U.P. of MI, no appreciable changes have been made to the ongoing forecast. ..Gleason.. 09/09/2022 .PREV DISCUSSION... /ISSUED 1135 AM CDT Fri Sep 09 2022/ ...Southeast States including Florida/eastern GA/coastal SC... To the east of a persistent upper low centered over the north-central Gulf of Mexico and middle portion of the Gulf Coast region, scattered showers and thunderstorms are prevalent over the eastern Gulf of Mexico toward the western Florida Peninsula and other parts of the coastal Southeast. Ample insolation is occurring across the Florida Peninsula to the south of a front coincident with a very moist environment, although weak mid-level lapse rates will tend to temper updraft intensities. Moderately strong southwesterly low/mid-tropospheric winds will overlie the front from far northern Florida into southeast Georgia/coastal South Carolina. A few transient supercells could regionally occur, particularly in proximity to this front. A few instances of wind damage are possible aside from the potential for a brief tornado. ...Northern Wisconsin/Upper Michigan... Will maintain low severe probabilities across the region in vicinity of the southeastward-moving front. Thunderstorms may persist on an isolated basis today, with renewed development a bit more probable toward/after sunset. An instance or two of severe hail could occur. ...Southern California/southwest Arizona... It still appears that severe potential will remain low north of the international border in association with current Tropical Storm Kay. Read more CHECK UPDATE ZOOM GRAPHIC
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