textproduct: Western and Central Wyoming

KEY MESSAGES

- Morning fog along I-80 over the western half of Sweetwater County and across the western valleys and Yellowstone will gradually dissipate between 10 AM and 12 PM Friday.

- Otherwise, dry conditions and seasonal temperatures stay in place for most areas through Friday. Temperatures will be 5 to 10 degrees warmer in the Bighorn Basin and across Johnson/Natrona Counties Thursday afternoon.

- There is a 10 to 20 percent for light rain or snow showers over portions of south Lincoln and Sweetwater Counties starting late Thursday evening and continuing through most of Friday morning.

- Dry conditions and generally light winds continue through the weekend. Temperatures climb to above average Saturday and persist into the middle of next week.

DISCUSSION

Issued at 153 AM MST Thu Nov 5 2026

Another day of quiet weather returns to the Cowboy State today, as an area of high pressure shifts over eastern MT/WY and the western Dakotas. The main impacts will be temperatures rising a few degrees above normal in the Bighorn Basin and Natrona County and as high as 13 degrees above normal over Johnson County today. Additionally, southwest winds with gusts up to 20 mph will occur from South Pass to eastern Johnson County this afternoon.

A trough will move over the region on Friday, shifting the area of high pressure over the Dakotas and Upper Midwest. Very light rain showers will be possible over Sweetwater County between 11Z and 20Z along the tail end of the trough. West to southwest winds with gusts of 20 to 25 mph will impact most areas Friday afternoon in the wake of the trough. Otherwise, temperatures will return to more seasonal levels. A broad ridge will then build over much of the Intermountain West and extend over the Northern Rockies by Saturday keeping conditions dry. Above normal temperatures return to the Bighorn Basin and Johnson/Natrona counties Saturday, becoming more widespread across the CWA on Sunday. A fast moving trough will pass over the northern half of the state Monday as the ridge folds over. The flow pattern will be more zonal Monday and Tuesday, before another ridge returns over the Northern Rockies Wednesday and remains in place Thursday. Conditions look to remain dry through the next 7 days, apart from the aforementioned light showers possible Friday morning.

AVIATION /18Z TAFS THROUGH 18Z FRIDAY/

Issued at 1013 AM MST Thu Nov 5 2026

Fog has been persistent in far western valleys this morning, but is finally eroding at KJAC and KAFO. Low clouds should quickly thin out, with only high clouds through the rest of the day. KRKS fog has been expanding the past couple hours, so need to expand the timing into this afternoon. KRKS clouds should finally thin once the southwest winds start back up around 21Z. While moisture remains in place at these locations overnight, there may be just enough of a breeze to keep things more mixed tonight, so currently have just low clouds and not fog for the time being. Remaining sites across western and central Wyoming remain VFR with only passing high cirrus this afternoon and tonight, before mostly clear skies return on Friday.

RIW WATCHES/WARNINGS/ADVISORIES

None.