Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Sun Mar 24 2024 16:30:04 ACUS01 KWNS 241629 SWODY1 SPC AC 241628 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1128 AM CDT Sun Mar 24 2024 Valid 241630Z - 251200Z ....THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING OVER PARTS OF SOUTH-CENTRAL KANSAS AND NORTHWEST OKLAHOMA... ....SUMMARY... Large hail, damaging gusts and a few tornadoes are possible this afternoon and evening over parts of the central/southern Plains. ....Southern KS into Western OK... Morning water vapor loop shows a fast-moving negatively-tilted upper trough rotating across the four-corners region toward the southern Plains. Ahead of this system, strong low-level cyclogenesis is occurring over eastern CO, resulting in strong southerly low-level winds throughout much of the southern Plains. Strong heating in the High Plains will help to mix the surface dryline eastward into the eastern TX Panhandle by mid/late afternoon, where widely scattered thunderstorms are expected to form. This will be on the nose of a 70-80 kt mid-level jet max. The synoptic setup, vertical shear profiles, and mid-level lapse rates look very favorable for severe storms today. The major limiting factor for a more significant outbreak is the meager low-level moisture (dewpoints only in the low-mid 50s). This will likely limit the number of storms that form, and result in higher-based storms with somewhat weaker updrafts. Nevertheless, those storms that can become established should be discrete supercells for some period of time and pose a risk of large hail, damaging winds, and a few tornadoes. Have added a small ENH for parts of northwest OK and south-central KS where 12z guidance has highest confidence of storm coverage. ....Northwest KS... Cold temperatures aloft and convergence near the surface low/front will result in a period of strong/severe thunderstorms this afternoon. While this period of concern will likely only last 2-3 hours, thermodynamic profiles suggest a risk of hail in the stronger cells. ....West-central to North TX... It remains unclear how many dryline storms will form this afternoon over west-central TX. CAM guidance is quite diverse, but most models show only one or two storms. Any activity that does form would have a risk of large hail and damaging winds. After dark, a more consistent signal of robust convection occurs as the Pacific cold front and mid-level jet forcing overspreads the area. Forecast soundings suggest sufficient CAPE/shear for a risk of hail and damaging winds into the overnight hours. ...Hart/Thornton.. 03/24/2024 $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.20-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .