Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Sat Aug 23 2025 19:30:24 ACUS01 KWNS 231930 SWODY1 SPC AC 231928 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0228 PM CDT Sat Aug 23 2025 Valid 232000Z - 241200Z ....THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE COLORADO/WYOMING FRONT RANGE AND ADJACENT CENTRAL HIGH PLAINS... ....SUMMARY... Isolated severe thunderstorms appear possible near the Colorado/Wyoming Front Range and central High Plains this afternoon and evening. ....20z Update... No changes are needed to the current D1 Convective Outlook. See previous discussion below for more information. ...Thornton.. 08/23/2025 ..PREV DISCUSSION... /ISSUED 1122 AM CDT Sat Aug 23 2025/ ....Front Range/Central High Plains... A mid/upper-level anticyclone centered over the Southwest and Four Corners regions will move little today, with ridging extending northward across much of the Great Basin and Northwest. Modestly enhanced northwesterly mid-level flow will exist today across the central Rockies and adjacent High Plains. A moist post-frontal airmass will remain in place across these areas, with surface dewpoints generally in the mid to upper 50s. Low cloud cover remains prevalent across the central High Plains late this morning, which should continue to hinder destabilization to some extent. Even so, gradual thunderstorm development should eventually occur over the higher terrain by late afternoon as persistent low-level upslope flow aids parcels in reaching their LFCs. This activity should spread generally south-southeastward through the evening along/near the I-25 corridor, while posing an isolated threat for mainly hail due to a combination of modestly steepened lapse rates aloft, sufficient deep-layer shear, and weak to moderate MLCAPE. Occasional strong/gusty winds may also occur. ....Great Lakes/Midwest... Isolated thunderstorms should develop along a cold front this afternoon as it advances eastward across part of the Great Lakes/Midwest. Warm low/mid-level temperatures in the presence of generally low/mid 60s surface dewpoints should limit buoyancy and updraft strength, likely keeping the overall severe potential low. $$ = = = 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) .