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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.

ARLINGTON HEIGHTS WEATHER

Wednesday, December 22, 2021

SPC Dec 22, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1030 AM CST Wed Dec 22 2021 Valid 221630Z - 231200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS IN THE COASTAL PACIFIC NORTHWEST... ...SUMMARY... A brief tornado and/or isolated damaging winds are possible along the Washington coast this afternoon, and along the Oregon to northern California coast this evening into the overnight. ...Pacific Northwest... A positive-tilt upper trough off the coast of southern British Columbia will continue to amplify and dig southeastward as it approaches the Pacific Northwest tonight. A related cold front will spread inland across coastal Washington later this afternoon/early evening and parts of Oregon tonight. Overall buoyancy will remain minimal, but low-topped convection should increase near the front later today. Wind profiles will be conditionally supportive of brief low-topped supercells. This potential may be relatively more probable along the Oregon coast early this evening as 50 kt 850-mb winds coincide with near-50F surface dew points and potentially a couple hundred J/kg SBCAPE. A brief tornado, isolated severe wind gusts, and small hail are all possible in the more robust low-topped convection consisting of showers and sporadic lightning flashes. ..Guyer/Wendt.. 12/22/2021 Read more LIVE: spc.noaa.gov
http://dlvr.it/SFsd9W
SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)