textproduct: Western and Central Wyoming

KEY MESSAGES

- Mostly sunny skies again today for most of the region, with highs in the 70s and 80s. An isolated shower or thunderstorms (under 20%) is possible for eastern Sweetwater and Natrona Counties late this afternoon.

- Warming trend continues the rest of the week into the upcoming weekend with highs in the 70s and 80s. Temperatures Saturday may reach the lower 90s east of the Divide.

- Warm and dry conditions will bring elevated to near critical fire weather concerns through the rest of the week. Humidity readings of 8 to 15% with afternoon wind gusts of 15 to 25 mph.

DISCUSSION

Issued at 209 AM MDT Tue Jun 2 2026

The meandering trough continues to spin along the MT/Canada border this morning, and will bring another weak shortwave around the south side during the day today. Light showers are already moving across greater Sweetwater County, sweeping to the northeast. Current timing for this trough is late morning into early afternoon, which will put most of the energy with the wave into NE WY during peak heating this afternoon. So the current band of showers will remain fairly weak with minimal accumulations into the early afternoon, and likely won't strengthen until after they reach NE WY. The remainder of western and central Wyoming will continue with mostly sunny skies and temperatures again reaching the 70s and 80s. With some wind gusts reaching 15 to 25 mph today, there will be some elevated fire weather concerns for lower elevations.

As this wave moves northeast tonight, weak ridging will build into western WY overnight, keeping things more stable during the day Wednesday. Skies will be mostly sunny again, with most areas seeing highs in the 80s.

Another shortwave moves mainly across Montana during the day Thursday, which will be close enough to bring showers to far northern WY Thursday afternoon. Stronger ridging builds Friday into the weekend, with even warmer temperatures in the 80s, with some 90 degree readings east of the Divide on Saturday.

AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/

Issued at 945 PM MDT Mon Jun 1 2026

VFR conditions are expected across the region over the next 24 hours. Lingering breezy conditions this evening will taper down to light winds and clear skies overnight.

Winds become breezy at most sites Tuesday afternoon, with both RKS and CPR having a 30% of nearby showers impacting the airfield vicinity, causing erratic gusts mid-afternoon. Lightning is not likely, but there is still a 10% of thunderstorms given marginal instability in the atmosphere near these locations. Winds again decrease after sunset Tuesday evening.

RIW WATCHES/WARNINGS/ADVISORIES

None.