Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Fri May 30 2025 19:53:04 ACUS03 KWNS 301927 SWODY3 SPC AC 301926 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0226 PM CDT Fri May 30 2025 Valid 011200Z - 021200Z ....THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHEAST TEXAS AND ACROSS THE NORTHERN ROCKIES... ....SUMMARY... Isolated severe thunderstorms are possible from late morning into the afternoon Sunday across southeast Texas, and in the late afternoon to evening across a portion of the northern Rockies. ....Synopsis... Blocking is expected to break down with a more progressive pattern expected starting Sunday. A trough will persist near the Atlantic coast with an associated front across FL extending west into TX. A weak shortwave trough in the northwest flow will move across southeast TX during the day, potentially influenced by prior overnight convection. A continuation of morning convection or new development could occur during the afternoon along outflows, with localized potential for a couple of supercells and/or a storm cluster with large hail and wind damage potential. There is some potential for a small SLGT risk, but will defer to later updates in response to more limited predictability this far in advance. Otherwise, a northern-stream shortwave trough will cross the northern Rockies during the afternoon/evening, with an associated cold front. Scattered thunderstorm development is expected along and just ahead of the front, likely starting over the higher terrain of southern MT/northeast ID. Low-level moisture will be limited, but steep lapse rates and modest enhancement of midlevel flow will support isolated strong-severe outflow gusts, as well as marginally severe hail. Scattered thunderstorms will be possible across the Southwest as tropical moisture is entrained into an ejecting midlevel trough, but poor lapse rates will limit the potential for strong storms. Scattered thunderstorms will also be possible across central/south FL, along and south of a weak, stalled front. Some enhancement to flow aloft will persist over FL, and this area will be monitored for low severe probabilities (dependent on sufficient cloud breaks) in later updates. ...Thompson.. 05/30/2025 $$ = = = 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) .