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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

Monday, December 27, 2021

SPC Dec 27, 2021 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0152 PM CST Mon Dec 27 2021 Valid 272000Z - 281200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are possible today over parts of the mid/upper Ohio Valley region, while an isolated storm or two may also evolve late tonight from the northeast Oklahoma vicinity to the Ozarks. ...Discussion... Aside from a few minor line adjustments, primarily to decrease the size of the thunder area over the Ozarks vicinity due to very meager -- and low-topped -- CAPE, the ongoing outlook continues to reflect current expectations. No major changes are therefore required at this time. ..Goss.. 12/27/2021 .PREV DISCUSSION... /ISSUED 1004 AM CST Mon Dec 27 2021/ ...Upper Ohio Valley... A surface warm front currently extends across central OH into northern WV. This boundary will lift slowly northward today into PA, with a warmer and marginally unstable air mass spreading into those areas. Several 12z cams suggest the development of a few thunderstorms during the late afternoon/early evening across southeast OH, the northern panhandle of WV, and southwest PA. Forecast soundings show sufficient elevated CAPE and cloud-bearing shear to pose a risk of small hail and/or gusty winds in the strongest cells. At this time, the risk of severe storms appears low enough to keep probabilities less than 5%. ...OK/MO Vicinity... After midnight tonight, showers and a few elevated thunderstorms are expected to develop in a zone of intensifying low-level warm advection over eastern OK, southeast KS, southwest MO, and northwest AR. No severe storms are anticipated. Read more LIVE: spc.noaa.gov
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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)