Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Sun Jan 21 2024 12:53:14 ACUS01 KWNS 211253 SWODY1 SPC AC 211251 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0651 AM CST Sun Jan 21 2024 Valid 211300Z - 221200Z ....NO SEVERE THUNDERSTORM AREAS FORECAST... ....SUMMARY... Severe thunderstorms are not forecast through tonight. ....Discussion... A broad zone of low-amplitude cyclonic flow aloft is forecast to encompass the western U.S. today, and will expand eastward into the Plains tonight. Farther east, an eastern U.S. trough will continue departing into the western Atlantic, while ridging shifts eastward in its wake, and ahead of the expanding western U.S. cyclonic flow. At the surface, an expansive surface high will prevail over the eastern half of the country, along with an accompanying cold continental airmass. As western U.S. troughing advances eastward, including a lead short wave that will cross the Desert Southwest and northern Mexico through the period, low-level warm advection will expand across the southern Plains. Northward transport of higher theta-e low-level air will support elevated destabilization, and the development of showers and thunderstorms across parts of central and eastern Texas, mainly tonight. Farther west, smaller cyclonic disturbances will continue spreading eastward/inland, which -- coupled with abundant Pacific moisture -- will result in widespread precipitation. While instability should remain weak at best, a few thunderstorms will be possible across the southern Arizona vicinity today, and portions of coastal California tonight. In all areas, severe storms are not expected. ...Goss/Mosier.. 01/21/2024 $$ = = = 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 3.14-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .