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Weather conditions on bar directly above are near Lakefront. Tabs under Moon Phases refer to O'Hare (official).

Archives for SPC Convective outlook are updated daily with a live map a the beginning of the article. Touch or click map to get possible update, and follow link at end of article for referral to NOAA/NWS Storm Prediction Center. Archives for Chicago's hourly weather data were updated 24-48 hours after end of each day prior to Dec. 2020.

Friday, January 21, 2022

SPC Jan 21, 2022 0830 UTC Day 3 Severe Thunderstorm Outlook

SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0157 AM CST Fri Jan 21 2022 Valid 231200Z - 241200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Sunday. ...Synopsis... An expansive upper trough is forecast to be in place across much of the central and eastern CONUS early Sunday. A shortwave trough is expected to progress through this upper trough, moving from the Lower OH Valley eastward through the central Appalachians and off the Mid-Atlantic Coast. Progression of this shortwave will result in some dampening of the upper troughing across the eastern CONUS, with a more zonal pattern expected over the region by early Monday. Farther west, an upper low initially centered over the northern Gulf of California will trend more progress during the period, moving east-northeastward across the Southwest. A stable, continental air mass is expected to be in place over the majority of the CONUS, precluding thunderstorm development. The only exception is in the vicinity of the upper low moving across the Southwest, where cold temperatures aloft could result in limited buoyancy. Even with the cold mid-level temperatures, dry low-levels will likely keep any potential thunderstorm coverage less than 10 percent across the region. ..Mosier.. 01/21/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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