Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Thu Jun 12 2025 05:19:31 ACUS02 KWNS 120519 SWODY2 SPC AC 120518 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1218 AM CDT Thu Jun 12 2025 Valid 131200Z - 141200Z ....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM SOUTHERN MONTANA INTO MUCH OF THE CENTRAL HIGH PLAINS... ....SUMMARY... Scattered severe storms may occur Friday from Montana into the central Plains, with hail and corridors of damaging winds possible. ....Synopsis... A shortwave trough will move across the Pacific Northwest during the day and into the northern Rockies late, with an upper ridge building from northern Mexico into AZ/NM. Meanwhile, modest westerly flow aloft will exist over the Northeast as a weak disturbance moves across AR/MO and into the mid MS/Lower OH Valleys. At the surface, low pressure will exist across the Great Basin with a southwest flow regime south of the upper trough, with a lee trough along the length of the High Plains. Increasing boundary layer theta-e will spread into the High Plains via southeast winds, resulting in an elongated area of scattered severe storm potential during the afternoon and evening. ....MT into the central High Plains... Strong heating will occur over much of west-central/southwest MT, and extending into WY CO and NM, as well as western NE/KS/TX-OK Panhandles, resulting in steep lapse rates. Meanwhile, southeast surface winds will bring moisture northwestward into the High Plains, with a large area of moderate instability developing. Storms are expected to form by 21Z over western MT, with additional storms into eastern WY/northeast CO. These will likely produce hail and areas of damaging wind. Other isolated storms are likely all the way south into eastern NM/western TX. Elsewhere, strong instability and ample moisture may result in scattered strong storms over much of MO, AR, LA, MS and vicinity, though the likelihood of ongoing early storms and outflows results in low predictability at this time. Locally strong gusts may occur. ...Jewell.. 06/12/2025 $$ = = = 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) .