Temps | Gusts | WU KORD KPWK

CLICK for this month's BIG night sky ...




Cardinal SAT


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.


Saturday, February 4, 2023

SPC Feb 4, 2023 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1133 PM CST Fri Feb 03 2023 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The severe-thunderstorm threat is low on Saturday. ...Northern CA... Latest model guidance continues to suggest a strong short-wave trough will approach the northern CA Coast by the end of the period. 120m mid-level height falls (12hr) will overspread this region north of a pronounced 500mb jet (85kt). This feature will translate inland after 05/06z, aiding destabilization as lapse rates steepen. Mid-level temperatures will cool significantly Saturday night with 500mb values dropping at least 10C during a 12hr period north of the jet. Forecast soundings suggest marine-influenced coastal areas will support deep convection, capable of producing lightning by 05z, while upslope regions of the Sierra Nevada will destabilize toward the end of the period. ...South FL... Weak height rises are expected across south Florida Saturday along the southern fringe of modest west-northwesterly flow aloft. While the primary surface front has currently sagged into the FL Straits, large-scale pattern favors higher-PW air mass advancing north again during the latter half of the period. Deep easterly flow across the southern Peninsula should aid a zone of weak low-level convergence that will establish itself near the FL Atlantic Coast. While lapse rates will remain poor, forecast soundings suggest ample buoyancy for at least a threat of lightning discharge within the deeper, more robust updrafts. ..Darrow/Weinman.. 02/04/2023 Read more CHECK UPDATE ZOOM GRAPHIC
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)