textproduct: Western and Central Wyoming

KEY MESSAGES

- Not as warm Monday behind a weak cold front with dry and breezy conditions persisting for Southwest Wyoming through the afternoon and early evening.

- Temperatures up to 15 to 20 degrees cooler for much of the area Monday afternoon.

- Dry conditions continue with a warming trend throughout the work week back to well above hot temperatures Thursday and Friday.

DISCUSSION

Issued at 200 AM MDT Mon Aug 3 2026

WV imagery shows dry slotting conditions for much of the northern Rockies with the main finger of the PFJ well north into Canada. IR shows mainly clear skies for the state with high pressure building in from the south behind a weak shortwave that has pushed through much of the CWA east of the Divide. As such, a weak cold front has pushed through the state affecting mainly portions east of the Divide through early Monday morning. This will result in more of northerly direction for winds and temperatures up to 15 to 20 degrees cooler in the afternoon than that of Sunday. Areas west of the Divide, especially south and southwestern portions of the CWA will not see much of the affects. Westerly winds persist in these areas where gusts up to 30 to 35 mph are likely through sunset before easing into the overnight hours Monday into Tuesday morning. This will continue to the red flag conditions before weaker winds expected Tuesday onward through the work week.

Going forward, expect mainly dry conditions and a slight warming trend through the rest of the week and into the weekend. The only exception will be a shortwave that will skirt by to the northeast, that will have weak PoPs around 15 to 20 percent for the northern Bighorns and into Johnson County Tuesday evening through about midnight. Quick moving and progressive, this will have limited impacts and QPF of note. Temperatures will push back to well above average once again for Thursday and Friday with areas east of the Divide pushing triple digits once again east of the Divide possibly pushing some records as well. Nothing of note on the horizon outside of the increasing temperatures and elevated to near critical fire weather conditions, but no strong wind events look to occur as well. Longer term model solutions show a possible pattern change by early to mid next week as the upper level flow and upper high to the south weaken as trough digs down across the Pacific northwest. Time will tell, but in the meantime, enjoy the "cooler" Monday before temperatures push right back up throughout the week with no precipitation of note on the horizon.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 500 AM MDT Mon Aug 3 2026

VFR conditions expected throughout the period for all TAF sites. Light winds 10kts or less to start increasing behind a weak cold front east of the Divide after 14-16Z, gusting up to 25 to 30kts, highest at CPR. Breezy west to northwest winds west of the Divide up to 25kts, except for JAC hovering around the 10kt mark during peak heating of the afternoon. Winds will diminish after 02-5Z after sunset due to radiational cooling under continued clear skies and dry conditions throughout the period.

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

FIRE WEATHER

Issued at 200 AM MDT Mon Aug 3 2026

Behind a cold front, fire concerns should lessen across northern and central Wyoming with cooler temperatures and higher humidity. Critical fire weather conditions continue for southern and southwestern portions of the state due to warmer temperatures and lower humidity values below 10 percent Monday afternoon and early evening. Breezy westerly winds up to 30 to 35 mph persist leading to red flag conditions for these areas of the wind corridor.

RIW WATCHES/WARNINGS/ADVISORIES

Red Flag Warning until 9 PM MDT this evening for WYZ277>279- 289.