Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Tue Jul 22 2025 17:32:54 ACUS02 KWNS 221732 SWODY2 SPC AC 221730 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1230 PM CDT Tue Jul 22 2025 Valid 231200Z - 241200Z ....THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM UPPER MICHIGAN SOUTHWESTWARD TO NEBRASKA... ....SUMMARY... Organizing clusters of storms posing a risk for severe wind are possible across parts of the middle Missouri Valley and Upper Midwest into adjacent portions of the Great Lakes region Wednesday through Wednesday night. ....Synopsis... An upper high will remain over parts of the Southeast and Mid Atlantic on Wednesday, with ridge axis shifting east from the Upper Great Lakes into the Northeast as a low-amplitude shortwave trough moves across the northern Plains. This wave will bring cooling aloft from the northern Plains toward the Upper Great Lakes, with lift focused near a surface low moving from southern MN toward Lake Superior. A cold front will extend southwestward from the low, extending from Upper MI into KS by 12Z Thursday. Persistent south/southwest 850 mb winds across the Plains will aid boundary layer mixing and northward transport of moisture toward the frontal zone. Enhanced low-level shear may develop near the warm front as it moves across northern WI into western Upper MI. Well behind the cold front, veering surface winds into the northern High Plains will lead to a destabilizing air mass late in the day. ....Upper MI to NE... Storms are forecast to be ongoing along or just behind the cold front from northern SD into northwest MN Wednesday morning, with minimal wind risk. Area of heating and destabilization ahead of the front and outflows will then support numerous storms along the boundary from western KS/central NE northeastward into MN/WI/Upper MI, with one or more lines or MCSs producing severe gusts. Depending on air mass quality near the warm front across northern WI into the western MI Upper Peninsula, enhanced SRH could yield a tornadic storm or two. ....Central to northern High Plains... Southeast surface winds beneath modest west to northwest flow aloft will lead to elongated hodographs sufficient to sustain southeastward-moving cells capable of hail. Lapse rates aloft will not be particularly steep, but widely scattered instances of 1.00" hail appear likely from eastern WY to the Front Range during the late afternoon into early evening. ...Jewell.. 07/22/2025 $$ = = = 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 3.28-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .