textproduct: Western and Central Wyoming

KEY MESSAGES

- A weather system to the south of WY brings periods of clouds and rain shower chances (20-30%) to Lincoln and Sweetwater Counties through the day today. Little to no impacts expected with these showers.

- Overall dry conditions and light winds with seasonable temperatures continue through the rest of the week. Above normal temperatures expected starting Sunday into the middle of next week.

DISCUSSION

Issued at 121 AM MST Wed Nov 4 2026

Conditions remain quiet this morning, as high clouds have moved over areas west of the Divide in the last several hours since Tuesday evening. These are due to a closed low pressure system that is moving over northern UT currently and will continue to track eastward through the day today. Isolated light rain showers will be possible along and south of a Afton-to-Rock Springs line this afternoon as this system moves over CO. Little to no impacts will occur due to a lack of instability and any possible measurable precipitation is likely to occur closer to the low center over southern Sweetwater County. Otherwise, conditions will be benign across the CWA with seasonal temperatures and light winds. These conditions will be in place again Thursday as an area of high pressure shifts over eastern MT/the western Dakotas. Above normal temperatures will return for much of Johnson County as a result.

A trough will move over the region on Friday, shifting the area of high pressure over the Dakotas and Upper Midwest. No significant impacts are expected with the passage of the trough, however the GFS is progging a low chance for rain over northern portions. A broad ridge will then build over much of the Intermountain West and extend over the Northern Rockies by Saturday keeping conditions dry. Temperatures then trend above normal across the CWA by Sunday and remain in place through the middle of next week as the ridge folds over. Conditions also look to stay dry through this period, with a weak trough possibly moving over the area on Tuesday.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 414 AM MST Wed Nov 4 2026

Low, MVFR ceilings are forecast at KPNA and KBPI until winds shift to be more southerly, which currently looks to be around 16Z. Otherwise, VFR flight conditions are expected at all terminals. A weather system is tracking south of Wyoming through 00Z and will bring BKN to OVC high clouds across the state. This system will support isolated light showers across southern Wyoming from 16Z to 00Z. Given the isolated nature of showers, KRKS has a 15 to 20 percent chance of seeing rain at the terminal. Thus, VCSH has been maintained at KRKS.

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.