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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.

Monday, November 22, 2021

SPC Nov 22, 2021 2000 UTC Day 1 Convective Outlook

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0144 PM CST Mon Nov 22 2021 Valid 222000Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected across the contiguous United States today. ...20z Update... A few thunderstorms remain possible through early evening across southern Florida, and late tonight along coastal Washington/Oregon. No changes have een made from the previous outlook. ..Leitman.. 11/22/2021 .PREV DISCUSSION... /ISSUED 1023 AM CST Mon Nov 22 2021/ ...Synopsis/Discussion... A progressive yet amplified longwave pattern will prevail over the CONUS through tonight. Large-scale trough amplification will occur along/east of the Appalachians, while an additional shortwave trough amplifies as it approaches the coastal Pacific Northwest tonight. Some thunderstorms will remain a possibility across southern Florida and offshore waters today within the pre-frontal moist air mass. A few thunderstorms may also occur late tonight along coastal Washington/northwest Oregon as lapse rates steepen/minimal buoyancy develops in conjunction with the aforementioned shortwave trough. Read more LIVE: