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MOBILE DEVICE? Turn sideways. 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, December 16, 2022

SPC Dec 16, 2022 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1145 PM CST Thu Dec 15 2022 Valid 161200Z - 171200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Friday. ...Synopsis... Broadly cyclonic mid/upper-level flow will encompass the eastern two-thirds of the CONUS -- peripheral to a deep low-pressure system centered over the Upper Midwest/Great Lakes vicinity. Within the broad cyclonic flow over the East, an embedded shortwave trough will lift northeastward across New England. As related DCVA overspreads a plume of strong warm advection, weak elevated buoyancy should support isolated lightning flashes near coastal New England during the morning hours. However, much of this activity is expected to remain offshore. Farther south, the tail end of a weak cold front will move slowly southward across southern Florida and the Keys. Ahead of the front, filtered diurnal heating amid rich boundary-layer moisture (upper 60s/lower 70s dewpoints) should yield sufficient (albeit marginal) instability for isolated thunderstorm development along/ahead of the front. ..Weinman/Guyer.. 12/16/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)