textproduct: Western and Central Wyoming

KEY MESSAGES

- Showers begin late Sunday morning across northwest Wyoming before isolated to widely scattered showers and thunderstorms become more common between 12 and 2 PM. The best chance for the showers and storms is over the north-half of the state where a few storms could be strong (wind gusts around 50 mph). - Sunday stays unseasonably hot with daytime highs in the 90s to lower 100s. A Heat Advisory continues through Sunday evening for lower elevations east of the Continental Divide.

- Moisture from the southwest continues to stream northward into Wyoming through at least Wednesday, allowing for little change in the cadence of afternoon and evening showers and thunderstorms. Temperatures remain above normal.

DISCUSSION

Issued at 249 AM MDT Sun Jul 26 2026

The overall pattern across the western US remains relatively unchanged today, with the H5 ridge centered over the Four Corners, and WY along the northern periphery of the ridge. Above normal temperatures remain in place across the state under the ridge, with record to near-record highs again expected today. The Heat Advisory remains in place for the lower elevations of central and northern WY for the continued heat and the very warm overnight temperatures. Monsoon moisture continues to wrap around the northern edge of the ridge into NW WY, which will bring another round of showers and thunderstorms. Storms again will initially form on the higher elevations of western mountains and move to the northeast. Storms will have good forward motion again, so this will minimize the overall flooding threat. Strong Inverted-V profile indicates main thunderstorm threat will be gusty winds, possibly gusting above 50 mph, especially across northern WY where the T-Td spread will be greatest.

Longer term models show nearly no change in this pattern the entire week, with the H5 ridge holding fast across the southern Rockies. This will keep the heat in place, with the daytime thunderstorms each afternoon for NW WY. An embedded shortwave races around the northern edge of the ridge on Wednesday, which could bring an enhancement of the thunderstorms for more of the state.

AVIATION /12Z TAFS THROUGH 12Z MONDAY/

Issued at 519 AM MDT Sun Jul 26 2026

A few showers already lurking around KBPI/KPNA this morning, but these are quickly dissipating and moving NE, so any further impacts will be brief. Afternoon showers and thunderstorms expected to start around 18Z for most western WY sites, similar to yesterday. Any thunderstorms that do form will bring locally gusty winds above 40kts, especially around KCOD/KWRL. Since showers are isolated in nature, PROB30 groupings still hold well for today's forecast. Showers will be dissipating quickly this evening, with mostly clear skies overnight.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for the latest information on smoke, icing and turbulence forecasts.

RIW WATCHES/WARNINGS/ADVISORIES

Heat Advisory until 9 PM MDT this evening for WYZ003>006-010- 011-017-018-020.