Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Sun Mar 02 2025 16:21:51 ACUS01 KWNS 021621 SWODY1 SPC AC 021620 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1020 AM CST Sun Mar 02 2025 Valid 021630Z - 031200Z ....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE EASTERN TEXAS PANHANDLE INTO WESTERN OKLAHOMA AND WESTERN NORTH TEXAS... ....SUMMARY... Isolated severe thunderstorms appear possible from the eastern Texas Panhandle into western Oklahoma and western north Texas this afternoon and early evening. Large hail and severe wind gusts should be the main threats, but a couple of tornadoes may also occur. ....Southern High Plains... Elevated thunderstorms have developed this morning across parts of the TX Panhandle and northwest TX, as an upper low continues eastward over the southern High Plains. This activity may pose an isolated small hail risk in the short term with weak MUCAPE present, but greater severe potential remains evident later this afternoon and early evening. A very strong (80-100 kt) mid-level westerly jet is present in the base of the mid/upper-level low. Strong large-scale ascent associated with the left exit region of this jet will overspread the TX Panhandle/northwest TX and parts of western OK by this afternoon, encouraging robust thunderstorm development by 20-21Z. This activity will likely form along or just east of a weak surface low and attendant dryline that will be present over the eastern TX Panhandle and northwest TX. The primary limiting factor for the severe threat across this region still appears to be rather modest low-level moisture, with latest surface observations showing low to mid 50s surface dewpoints confined well south to parts of central/south TX. Even so, there is a chance for modest moistening though this afternoon, as ongoing elevated precipitation may help saturate low/mid levels to some extent. Mid-level lapse rates are also expected to quickly steepen through the day as the upper low moves eastward, and as cold mid-level temperatures gradually overspread the narrow warm sector. There may be a small/mesoscale corridor of greater severe threat this afternoon/early evening across southwest OK/western north TX and vicinity, where greater low-level heating appears possible behind the morning activity, and where somewhat better low-level moisture and related instability should be present. Current expectations are for the afternoon/early evening convection to pose a threat for mainly large hail and severe/damaging winds, as favorable lapse rates aloft and sufficient deep-layer shear support supercell structures initially. But, there is some veer-back-veer signal in the 2-5 km layer from various NAM/RAP forecast soundings, and convection may grow into a small bowing cluster fairly quickly (as shown by several HREF members). The severe threat will likely be limited in space and time by the narrow/small warm sector, with a more isolated/limited severe threat with eastward extent into central OK and north-central TX this evening due to weaker instability. Finally, the tornado potential remains a bit unclear, as low-level moisture will be quite limited. Still, a small zone of sufficient 0-3 km CAPE and ambient boundary-layer vorticity along the northward-developing warm front may support a couple of tornadoes given otherwise favorable low-level shear. ...Gleason/Thornton.. 03/02/2025 $$ = = = 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) .