textproduct: Western and Central Wyoming

KEY MESSAGES

- Monsoon moisture will be slightly decreased, but still in abundance for showers and thunderstorms this afternoon. Lack of upper level support will keep chances limited to higher elevations today.

- Ridging builds across the Rockies for this weekend, bringing another round of heat to the state. Areas of northern and central Wyoming could again reach 100 degrees.

- Remaining monsoon moisture will still be in place, so isolated showers and thunderstorms are still possible along higher elevations this weekend into early next week.

DISCUSSION

Issued at 247 AM MDT Thu Jul 23 2026

After a day of scattered to numerous showers and thunderstorms yesterday, the overall threat for precipitation decreases some for Thursday. The shortwave trough that swept across the state yesterday is moving into eastern WY, taking most of the thunderstorm activity with it. WV imagery shows the main moisture pool shifting east with it, while a push of drier air moves in from the west. The lack of midlevel energy and the decrease in moisture will keep thunderstorm activity much more isolated today, mainly along the higher elevations of the Absarokas and Winds. With PW values holding near 1.00 late this afternoon, will likely continue the Flash Flood Watch through this evening, but only for those mountain ranges, after yesterday's saturating rainfall keeps some watershed prone for more runoff.

The H5 ridge builds across the Rockies for the weekend, centered still on the Four Corners region. Temperatures jump nearly 10 degrees from Thursday to Friday, with highs in the upper 80s to the mid 90s. Saturday will see continued warming, with highs from the mid 90s for western valleys and south WY, to upper 90s and low 100s for northern and central WY. Monsoon moisture will still be able to draw into the state, but will be decreased enough to limit shower activity to higher elevations. The flooding risk will these will also be much lower. This warmer pattern with more isolated daytime showers on higher elevations look to remain the trend well into the upcoming week.

AVIATION /12Z TAFS THROUGH 12Z FRIDAY/

Issued at 520 AM MDT Thu Jul 23 2026

Most precip from last night has ended, with only remaining showers just north of KCPR and lingering around KCOD and KJAC. Morning showers will be minimally impactful at local airports, and will dissipate into the morning. The next round of showers and thunderstorms is expected after 18Z, mainly impacting KCOD, KLND, and KCPR. These will again bring a round of lowered cigs and vis, but are expected to be smaller and more isolated, so impacts will be more brief. Any storms that do form will start to dissipate by early evening, with more tranquil conditions overnight tonight.

RIW WATCHES/WARNINGS/ADVISORIES

Flood Watch until 6 AM MDT early this morning for WYZ001- 004>014-016>020-022>030.

Flood Watch through this evening for WYZ002-003-015.