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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.


Saturday, July 22, 2023

SPC Jul 22, 2023 1630 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1118 AM CDT Sat Jul 22 2023 Valid 221630Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE CENTRAL PLAINS AND SOUTHEAST... ...SUMMARY... Strong to severe thunderstorms capable of large hail and damaging winds are expected later today into this evening across the central Plains to Upper Midwest, while other severe storms will be possible across the Southeast States and southern Arizona. ...KS Vicinity... Morning visible satellite imagery shows clear skies over most of KS, where strong heating will combine with dewpoints in the mid 60s to yield afternoon MLCAPE around 1500 J/kg. Large scale forcing is subtle in this region, with weak mid-level height rises and diffuse surface boundaries expected to influence storm potential. Nevertheless, most 12z CAM solutions continue to show potential for widely scattered thunderstorms by late afternoon. Deep northwest flow aloft will provide sufficient vertical shear for rotating updrafts capable of large hail and damaging wind gusts. ...Gulf Coast Region... A weak surface boundary extends from southern MS eastward into southern GA today. The air mass along and south of the boundary is very moist and unstable. Scattered thunderstorms are expected to affect this region through the afternoon. The southern fringe of stronger mid-level westerlies lies along the boundary, and will likely result in at least isolated instances of damaging wind gusts. Please refer to MCD #1675 for further details. ..Hart/Thornton.. 07/22/2023 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)