textproduct: Cheyenne

KEY MESSAGES

- Dense fog is possible again overnight tonight into Sunday morning, with a chance for a few showers along and south of the I-80 corridor.

- A slightly more active pattern is expected into the middle of next week, with low precipitation chances returning Wednesday into Thursday.

SHORT TERM /THROUGH MONDAY NIGHT/

Issued at 129 PM MST Sat Nov 14 2026

A gloomy rest of the day is in store for us, as SE upslope flow is in place along and east of the I-25 corridor. This has resulted in rather widespread fog and low clouds throughout this morning, with some gradual clearing being observed via visible satellite imagery especially across portions of Laramie and Platte Counties in SE Wyoming. Low clouds and fog looks to linger in some areas of the NE Panhandle mainly south of the Pine Ridge, with a handful of locations currently observing visibilities between 1/2 to 1 mile. Overall expecting a gradual, but slight lifting of cloud bases from west to east throughout the afternoon, however most locations will still be impacted by at least some low cloud cover before the onset of more fog development after sunset into the overnight period. As many locations across the Nebraska Panhandle are still underneath a thick layer of low clouds, decreased high temperatures by around 5 degrees, with most locations east of the I-25 corridor struggling to get out of the 40s (which is actually normal for this time of year!).

A weak shortwave trough will continue to dig south and east of our area this evening and overnight, with the bulk of the forcing for ascent remaining well to our south in portions of Colorado. Overall, kept PoPs low (15-20%) for portions along and south of the I-80 corridor where some showers may manage to creep into our area from the south, though these are expected to be quite spotty and shouldn't amount to much in the way of beneficial moisture. One exception will be over the higher terrain of the Sierra Madre and Snowy Ranges, where there are currently some weak (<25 dBZ) radar returns, though not confident that much is making it to surface as mesonet observations are reporting 15-20 degree surface dewpoint depressions and WYDOT cameras aren't showing anything evident. Kept the highest PoPs (40-50%) over these higher elevations before 06Z as the system gradually move out of our area, but don't think anything will amount to much more than 1-2 inches of snow (if anything) on the mountain peaks.

For the lower elevations east of the Laramie Range, fog and poor visibilities will be the main hazard overnight under the upslope flow regime. Not confident in how widespread or dense the fog will be, but can anticipate a similar pattern to last night into early this morning which warranted a Dense Fog Advisory for much of the Nebraska Panhandle along with portions of Platte and Goshen Counties. Unlike today, expecting a faster dissipation of fog and low clouds tomorrow morning as 500 mb height rises and ridging builds in across much of the Central United States. As a result, tomorrow should be 5-10 degrees warmer than today, peaking in the mid to upper 50s east of the I-25 corridor, with slightly cooler upper 40s to low 50s to the west. Similar to the past couple of days, may need to bump forecast highs down a bit in areas where low clouds manage to hang on a bit longer.

Can expect further warming heading into the beginning of the work week as the ridge continues to amplify to our east, placing us in SW flow aloft. Dry conditions will persist through Monday, with highs potentially reaching the low to mid 60s east of the Laramie Range.

LONG TERM /TUESDAY THROUGH SATURDAY/

Issued at 129 PM MST Sat Nov 14 2026

The majority of the long term will feature relatively benign weather with a return to more seasonable temperatures and breezy conditions. Picking up on Tuesday, this will likely be the last day of above average temperatures as the ridge continues to push eastward away from the CWA. High temperatures will be in the 50s and 60s which is still anywhere from 10 to 15 degrees above average for mid-November.

A pattern change will arrive on Wednesday as a trough swings into the Rockies. A cold front will move across the area, late Tuesday night or early Wednesday morning, leading to high temperatures in the 40s and 50s--roughly average for this time of year. This front will be mostly dry, with predominately west winds promoting a dry downslope environment. The mountains, however, could see a quick shot of snow, with the Sierra Madre Range picking up a few inches of accumulation. The Snowys will likely be shadowed and not see much in the way of accumulations. The bigger concern with the frontal passage will be strong winds. Marginal high winds will be possible as MSLP gradients compress from the front. Winds aloft will increase up to about 50 kts with decent subsidence, so cannot rule out 60 MPH gusts during the day in the typical southeast Wyoming wind prones.

Seasonal temperatures will stick around on Thursday with little to no weather impacts expected. Some lingering breezy conditions are still likely west of the Laramie Range on Thursday, but the rest of the forecast area will see a quiet day. Friday into the weekend, things could get interesting with a potential impactful winter storm. Of course, its still over a week away with plenty of time for models to come to a solution, but there is a chance for accumulating snow and windy conditions.

AVIATION /00Z TAFS THROUGH 00Z MONDAY/

Issued at 434 PM MST Sat Nov 14 2026

Mixture of all flight categories expected due to lingering low clouds and some possible fog this evening through tomorrow morning. Impacted sites will be KCYS and all Nebraska terminals, with IFR to LIFR conditions likely through the morning hours. Early tomorrow clouds will start to lift, with conditions clearing by the beginning of the afternoon for all sites. Winds will be breezy, with speeds 10 to 20 knots, lessening for the most part overnight and then picking back up again tomorrow into the afternoon. Strongest winds at KRWL and KCDR.

CYS WATCHES/WARNINGS/ADVISORIES

WY...None. NE...None.