Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Tue Jun 10 2025 17:48:22 ACUS02 KWNS 101748 SWODY2 SPC AC 101746 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1246 PM CDT Tue Jun 10 2025 Valid 111200Z - 121200Z ....THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS TEXAS INTO LOUISIANA...THE UPPER MIDWEST/CORN BELT...AND NORTHERN ROCKIES/HIGH PLAINS... ....SUMMARY... Isolated severe thunderstorms are possible Wednesday over parts of the Northern Rockies and northern High Plains, the Upper Midwest/Corn Belt, as well as Texas to western Louisiana. ....Central to southern Texas... Ahead of a weak mid-level trough, moderate instability should develop over much of central into eastern/southern Texas with a moist surface air mass beneath seasonably cool mid-level temperatures. However, specifics are complicated by the potential of lingering early-day convection and outflows. Some guidance would suggest that convection/MCV-related enhancement to the flow field may occur and linger much of the day, a scenario in which a Slight Risk could be warranted into the Day 1 time frame pending corridors of more certain destabilization across central/east Texas. This flow enhancement could influence the potential for supercells and possibly a tornado risk within a moist environment. Scattered storms, including some clusters, can otherwise be expected with hail and wind possible. ....Upper Midwest/Corn Belt... A west/east-oriented stationary front will exist across this region, with strong heating aiding moderate to locally strong destabilization along and south of the boundary. The glancing influence of a shortwave trough may contribute to storm development as the boundary layer otherwise destabilizes Wednesday afternoon. Effective shear of 30-35 kt should generally exist near the front, potentially allowing for a few supercells and more prevalent multicells. Scattered storms producing hail/damaging wind appear most probable during the late afternoon and evening, progressing eastward out of Iowa toward the Illinois/Wisconsin border vicinity. A relatively narrow/confined Slight Risk could ultimately be warranted in the Day 1 time frame. ....Northern Rockies to Northern High Plains... Storms are expected to develop relatively early in the day from eastern Oregon across Idaho as a shortwave trough moves over the region. Scattered storms will develop and spread quickly eastward into parts of Wyoming and Montana, with areas of strong outflow expected. Scattered severe gusts may occur. Overall deep-layer shear appears most favorable from southern Idaho into western Wyoming, resulting in a few cells capable of hail as well as strong wind gusts. Additional severe storm development is expected by Wednesday late afternoon/early evening into the northern High Plains including near/east of the Big Horns. ...Guyer.. 06/10/2025 $$ = = = 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) .