DarkSky Temps | Gusts | WU KORD Data

CLICK for this month's BIG night sky ...

RADAR FULL MAP SCREEN

NEXRAD

STORMTRACK

Cardinal SAT

CHGOWX.COM



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, August 18, 2022

SPC Aug 18, 2022 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0224 AM CDT Thu Aug 18 2022 Valid 201200Z - 211200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE MIDWEST/MID MISSISSIPPI VALLEY INTO THE OZARKS... ...SUMMARY... Isolated strong to severe thunderstorms may occur Saturday across parts of the Midwest/mid Mississippi Valley into the Ozarks. ...Midwest/Mid Mississippi Valley into the Ozarks... A closed mid/upper-level cyclone over the Upper Midwest Saturday morning should evolve into a positively tilted trough as it moves slowly eastward across the Midwest, Great Lakes, and mid MS Valley through the period. A weak surface low associated with the upper trough should likewise move slowly eastward across IA and vicinity through Saturday evening. A cold front attendant to the surface low is forecast to progress east-southeastward across parts of the Midwest, mid MS Valley, and central/southern Plains. There is still some uncertainty with the placement and evolution of the cold front through the day, and with the quality of low-level moisture ahead of it. Depending on how much diurnal heating can occur across the warm sector, at least weak instability should develop in a fairly narrow corridor across parts of the Midwest/mid MS Valley and Ozarks. Most guidance suggests a gradual uptick in convective coverage should occur along/ahead of the front late Saturday afternoon into the early evening. Even with mid-level winds remaining fairly muted, there should be enough deep-layer shear for marginal updraft organization. Low severe probabilities have been included where confidence is greatest in loosely organized thunderstorm clusters occurring, with the modest deep-layer shear likely keeping the overall severe threat isolated. ..Gleason.. 08/18/2022 Read more CHECK UPDATE ZOOM GRAPHIC
http://dlvr.it/SWqyMC