textproduct: Western and Central Wyoming

KEY MESSAGES

- Widespread lower elevation rain and mountain snow occurs this morning and through the day today. Areas east of the Divide and Sweetwater County will likely (60-80% chances or greater) see moisture. Minor winter travel impacts for South Pass and Powder River/Granite Passes this morning. - North to northwest winds with gusts of 30 to 45 mph will continue across the area this morning, with gusts of 25 to 35 mph impacting western portions through 11AM. Strongest winds occur for northern Johnson County, where gusts 50 mph or greater are likely.

- Dry conditions with temperatures at or slightly below normal expected through the rest of the week.

DISCUSSION

Issued at 158 AM MST Mon Nov 2 2026

Light rain showers continue from areas around Muddy Gap to northwest Natrona County as of 08Z (1AM) this morning, with additional showers near Dubois and Pavillion in the Wind River Basin. North to northwest winds with gusts of 30 to 40 mph have also developed across areas east of the Divide in the last hour or so as the main sfc low has now moved over western portions of SD/NE. This trend (of winds and precipitation) will continue through the rest of the day today as the main storm system continues its eastward progression over the Northern/Central Plains. The highest amounts of precipitation will occur through the morning hours (focused over areas east of the Divide as well as Sweetwater County) as most of the supporting upper level dynamics will have shifted well to the east by 18Z. Natrona and southern portions of Johnson County are expected to receive the highest amounts, ranging between 0.20 to 0.50". Winds will increase over western portions by 12Z, with gusts of 25 to 35 mph, before decreasing after 18Z. At the same time, gusts of 50 to 60 mph will develop over northern portions of Johnson County and continue through much of the day. This remains in line with the current High Wind Warning for northern Johnson County that is in effect through 3PM. Snowfall amounts remain largely unchanged, with Winter Weather Advisories for the east slopes of the Wind River and Bighorn Mountains in effect through 5PM. Advisory amounts of snow (6") for Casper amounts are still on the marginal side with confidence remaining too low to issue an Advisory at this time. Overall, it will be a cloudy and windy day across the CWA today with daytime highs in the 40s.

Winds will decrease through the evening as the gradient begins to weaken and the main storm system continues its eastward progression. Gusts up to 35 mph will continue over much of Johnson County through the night. Clouds will also begin to scatter out from west to east in the evening. Possible fog formation will be a concern Tuesday morning as a result, especially for areas east of the Divide. Precipitation amounts today will likely help drive this from occurring.

Conditions are expected to remain dry through the rest of the week. An area of high pressure will settle over MT Tuesday and keep temperatures at or slightly below normal and winds light. This high center will also keep a weak Pacific system to the south over UT/CO Wednesday, with the main impact being mainly in the form of cloudy skies over southern/southwestern portions. The pattern briefly becomes more active by Thursday as another weak trough moves over the Northern Rockies and a second cold front clips northeastern portions of the state on Friday. High winds look possible again over northern Johnson County in the wake of this front, with a 110 to 120kt jet supporting the front. Wind looks to be the main impact with this front for now with conditions remaining dry through the weekend as a strong ridge moves over the Northern Rockies into Alberta/Saskatchewan.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 520 AM MST Mon Nov 2 2026

West of the Divide...KBPI/KJAC/KPNA/KRKS Terminals

Precipitation has ended across much of the area to start the period, with marginal MVFR/VFR ceilings. KRKS is the one exception with prevailing rain expected to return by 14Z. Conditions will drop to LIFR/IFR with the rain through 18Z. Winds with gusts up to 25kt at KBPI/PNA will occur through 00Z breezy at times with speeds of 10 to 15 knots and occasional gusts of 20 to 25 knots. A meso-low circulation will be located near KRKS around 18Z, keeping winds variable and 5kt or less. Mountains will be obscured through 00Z, with clouds scattering out through the evening.

East of the Divide...KCOD/KCPR/KLND/KRIW/KWRL Terminals

IFR/MVFR conditions will be widespread across the area to start the TAF period, along with mountain obscurations. LIFR conditions will continue at KCOD through 17Z. Conditions will drop to LIFR at times at KCPR and KLND through 18Z with periods of rain this morning. are gradually diminishing across nearly all terminals to start the TAF period. Precipitation coverage will gradually shift to Natrona and Johnson counties through the morning, becoming confined to these counties through the afternoon. MVFR conditions will become more widespread after 18Z. North to northwest winds, with gusts of 25 to 30kt, will be widespread across the area through 00Z. Stronger gusts of 40 to 50kt will occur over the northern half of Johnson County. Winds will begin to decrease after 00Z, with clouds beginning to scatter out and becoming FEW-SCT FL050 after 06Z.

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

RIW WATCHES/WARNINGS/ADVISORIES

Winter Weather Advisory until 5 PM MST this afternoon for WYZ009-015.

High Wind Warning until 3 PM MST this afternoon for WYZ010.