textproduct: Western and Central Wyoming

KEY MESSAGES

- Dense smoke continues into Tuesday morning across most of northern and western Wyoming. Air quality remains unhealthy for sensitive groups.

- Weak shower activity possible (10-15%) across the northern Absarokas and Bighorns Tuesday afternoon and evening with no impacts expected.

- Dry conditions and a warming trend onward through the rest of the work week and into the weekend.

DISCUSSION

Issued at 100 AM MDT Tue Aug 4 2026

WV imagery continues to see the upper level low to the northeast now into Canada with positively tilted troughing stretching to the southeast across the northern Rockies. IR shows clears skies with nothing of note on radar for the CWA. Relatively light winds into Tuesday with areas of smoke continuing through much of the day until the aforementioned low pushes further east and high pressure builds back in from the south. On the backside of this upper level low, a few sporadic showers possible (10-15%) for the northern Absarokas and Bighorns, aided by terrain induced development for the late afternoon and early evening hours. No impacts expected with little to no accumulation before quickly pushing east and dying off before sunset and into the overnight hours Tuesday. Temperatures similar to Monday afternoon remaining on the cooler side relative to the weekend and last week.

Beyond Tuesday, expect dry conditions a warming trend through the remainder of the work week and into the weekend. Northwest flow continues across the state as the main high to the south builds in with increasing convergence aloft. As the upper level flow weakens by Thursday and Friday, temperatures push back above average 15 to 20 degrees. Widespread 80s west of the Divide and 90s to possible triple digits once again for portions east of the Divide. Heat and dry conditions extend into the weekend and early next week. Fire weather conditions will only remain elevated during this time with no stronger winds expected as the low level flow weakens as well with a degraded pressure gradient across much of the state. Smoke conditions will improve Wednesday onward as well, with the high pressure building in from the south and aforementioned low well to the east by this point.

Upper level ridging continues but becomes more zonal by early next week as a trough extends across the Pacific northwest. This will give some possible better chances of precipitation next week with not so hot temperatures as well, but still above average with no significant weather pattern change on the horizon otherwise.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 430 AM MDT Tue Aug 4 2026

VFR conditions expected throughout the period for all TAF sites. Light winds and clear skies for the entirety of the period with areas of haze due to smoke at all locations after about 14-15Z restricting visibility to 5-6SM at times there after. Increasing west to northwest winds after that time, gusting up to 25kts at BPI/PNA/RKS west of the Divide with winds around 10kts to the east through peak heating of the afternoon. Winds decrease after around 03Z with radiational cooling under continued clear skies into the overnight hours through Wednesday morning.

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

RIW WATCHES/WARNINGS/ADVISORIES

Air Quality Alert until 11 AM MDT this morning for WYZ001>011- 016>020-022.