Mesoscale Discussion 1744
Issued: · Valid: –
Summary
Isolated severe wind gusts up to 60 mph are possible across northern Wyoming and far southwest South Dakota this afternoon and evening.
Product Text
000 ACUS11 KWNS 262026 SWOMCD SPC MCD 262026 SDZ000-WYZ000-MTZ000-262200- Mesoscale Discussion 1744 NWS Storm Prediction Center Norman OK 0326 PM CDT Sun Jul 26 2026 Areas affected...northern Wyoming into far southwest South Dakota Concerning...Severe potential...Watch unlikely Valid 262026Z - 262200Z Probability of Watch Issuance...5 percent SUMMARY...Isolated severe wind gusts are possible with storms across northern Wyoming and far southwest South Dakota this afternoon/evening. DISCUSSION...Storms have developed off the higher terrain of the Tetons, Big Horns, and Black Hills this afternoon. Additional storms are expected within these zones this afternoon. The environment is not that unstable (~250 J/kg MLCAPE per SPC HRRR-Based Mesoanalysis), but a very deeply mixed environment (per 18Z RIW and UNR VWP) will support some wind threat. In addition, 50+ knots of flow above 300mb should provide ample shear for some storm organization, despite the weak instability. Therefore, isolated severe wind gusts are possible this afternoon/evening, but no watch is expected given the weak instability. ..Bentley/Leitman.. 07/26/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...UNR...CYS...BYZ...RIW... LAT...LON 44690961 45010611 44520327 43170347 43140524 43460861 43660928 44070978 44690961 MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH