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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.


Tuesday, February 28, 2023

SPC Feb 28, 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 1139 PM CST Mon Feb 27 2023 Valid 281200Z - 011200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Tuesday. ...Discussion... Low amplitude, quasi-zonal flow will envelop much of the CONUS east of the Rockies today. Meanwhile, a large-scale upper trough will deepen over the western U.S. as an intense upper-level jet dives southward near the Pacific coast. Cold temperatures aloft will aid in the development of weak instability amid forcing aided by the strong jet streak nearing the Pacific Coast, and isolated thunderstorm will be possible from coastal OR into northern CA. A stalled frontal boundary will become diffuse over the southeastern U.S., while surface high pressure develops from the Midwest to the Northeast. Boundary-layer moisture will remain confined to the Gulf Coast vicinity until later in the period when weak low pressure develops over the Plains. Southerly low-level flow will transport moisture northward across central/eastern TX into the Mid-South this evening into early Wednesday morning. Modest warm advection amid weak instability and strong capping will preclude thunderstorm activity. ..Leitman/Flournoy.. 02/28/2023 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)