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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

Thursday, December 23, 2021

SPC Dec 23, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1024 AM CST Thu Dec 23 2021 Valid 231630Z - 241200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE SACRAMENTO VALLEY... ...SUMMARY... A brief/weak tornado and small hail are possible in a portion of the Sacramento Valley late this afternoon. ...Sacramento Valley... Ahead of the offshore upper trough that will reach SoCal early Friday, warm conveyor-related steady precipitation ongoing across north-central California early today will gradually shift southward, with more scattered low-topped convection expected to develop across northern California coincident with some cloud breaks later today. By late afternoon, low/mid-level lapse rates are expected to modestly steepen with the potential development of a couple hundred J/kg SBCAPE. That may coincide with a backing or persistence of south/southeasterly surface winds in the interior valley with a related modest increase in low-level hodograph curvature. This scenario could support a weak supercell or two late this afternoon, with the possibility of a brief/weak tornado and small hail. ..Guyer.. 12/23/2021 Read more LIVE: spc.noaa.gov
http://dlvr.it/SFwnNn
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)