Day 3 Convective Outlook
Issued: · Valid: –
Summary
Isolated strong to severe thunderstorms are possible across parts of the Great Basin and the Northern Plains through the evening. These storms may produce occasional strong gusts as they move toward eastern Wyoming, Montana, and the western Dakotas.
Product Text
000 ACUS03 KWNS 271918 SWODY3 SPC AC 271917 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0217 PM CDT Thu Aug 27 2026 Valid 291200Z - 301200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE GREAT BASIN AND NORTHERN PLAINS... ...SUMMARY... Isolated strong to severe storms are possible from parts of the northern Great Basin to the northern Plains. ...Great Basin to Northern Plains... A belt of enhanced southwesterly flow will overspread the region ahead of an upper shortwave trough moving east across the Pacific Northwest and northern Rockies. Modest boundary layer moisture will be in place with surface dewpoints generally in the upper 40s to upper 50s, though 60s are possible across portions of the Dakotas. This will support modest destabilization from the Great Basin into the Dakotas. Widely scattered storms are expected to develop across the Great Basin and spread east/northeast through evening. Steep low-level lapse rates and stronger flow atop a well mixed boundary layer will support occasional strong to severe gusts. Sufficient clustering may occur, supporting some upscale development as storms move over eastern WY/MT into the western Dakotas during the evening. It is possible this activity will encounter a more moist and unstable airmass, promoting greater severe potential. However, the evolution of a surface low and associated frontal boundary across the Dakotas is uncertain, precluding higher severe probabilities at this time. ..Leitman.. 08/27/2026 $$