textproduct: Western and Central Wyoming

KEY MESSAGES

- Today will be the hottest day of the week with isolated thunderstorms mainly in southern and western Wyoming.

- Monsoonal moisture increases on Saturday with more numerous showers and thunderstorms, some may produce heavy rain and local flooding.

- Lingering moisture will bring a daily chance of showers and thunderstorms into early next week, with temperatures remaining near to above normal.

AVIATION /06Z TAFS THROUGH 06Z SATURDAY/

Issued at 946 PM MDT Thu Aug 20 2026

Any lingering showers end by the start of the TAF period. Monsoonal moisture will begin to move into southwestern portions of the area on Friday. Most of this moisture will be above the surface, so it will be enough for scattered rain showers and thunderstorms to develop, but not enough for much rain to reach the ground. Showers and storms will first develop near KBPI and KPNA around 20Z, with KJAC, KRIW, and KLND following around 21Z. There may be showers and storms near KRKS as well, but the chance was too low (15-20%) to include a PROB30 group at this time. There is about a 15% chance of showers at KBPI, KPNA, and KJAC late Friday evening once PROB30 groups end at 03-04Z.

Wind will remain below 10 knots tonight into Friday morning. Then, wind will increase late Friday morning and Friday afternoon to around 10 knots for most terminals. KCPR will be a bit gusty with gusts around 20 knots through the afternoon hours. The main threat with showers and storms will be strong downdrafts and outflows. Convective wind gusts may reach as high as 50 mph Friday afternoon.

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

None.