369 

ACUS11 KWNS 232256

SWOMCD

SPC MCD 232256 

WYZ000-UTZ000-IDZ000-NVZ000-240030-



Mesoscale Discussion 2106

NWS Storm Prediction Center Norman OK

0556 PM CDT Sun Aug 23 2026



Areas affected...northern utah...southeast Idaho and far southwest

Wyoming



Concerning...Severe Thunderstorm Watch 619...



Valid 232256Z - 240030Z



The severe weather threat for Severe Thunderstorm Watch 619

continues.



SUMMARY...Severe wind gusts and hail remain possible with strong to

severe storms across UT/ID and far western WY this evening.



DISCUSSION...Across WW 619, a band of strong to severe storms have

matured across eastern ID with more isolated strong storms ongoing

over northwest UT late this afternoon. A modestly moist, hot and

moderately unstable air mas remains in place ahead of these storms

which should continue to support them over the next several hours.

Steep low-level lapse rates will primarily favor severe wind gusts,

but enhanced mid-level flow at the base of the northern Rockies

upper trough is supporting some cellular structures. Hail is

possible, especially with any persistent supercells.



Expectations are for convection to gradually spread northeastward

across UT and far southwestern WY into this evening. Some clustering

is possible, based on recent CAM solutions. This appears most likely

over northern UT into southwest WY. This could support a localized

corridor of more concentrated severe wind gusts later this evening.

Given the ongoing storms and a generally favorable environment, the

severe risk continues for much of WW619.



..Lyons.. 08/23/2026



...Please see www.spc.noaa.gov for graphic product...



ATTN...WFO...RIW...SLC...PIH...LKN...



LAT...LON   40841426 42451323 42961137 42831076 42161028 41791002

            41361001 40651007 40011066 39891240 39851330 39921368

            40001404 40841426 



MOST PROBABLE PEAK WIND GUST...65-80 MPH

MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN