textproduct: Cheyenne

KEY MESSAGES

- Above average temperatures and dry conditions are expected to continue into and through the end of the week.

- Windy conditions are expected Tuesday, however, critical fire weather conditions are not anticipated at this time.

SHORT TERM /THROUGH TUESDAY NIGHT/

Issued at 151 PM MST Mon Nov 9 2026

Benign weather continues in the short term with mostly sunny skies and mild temperatures expected for the remainder of Monday afternoon. Quiet conditions will carry on into the overnight hours, with low temperatures once again staying on the mild side for early November.

The weather gets *slightly* more exciting on Tuesday. A dry upper- level shortwave will move into the CWA from the northwest bringing with it wind and some cloud cover. MSLP gradients will tighten along and west of the Laramie Range, helping to increase winds aloft. 800 to 700 mb winds will max out around 40 kts with decent subsidence over the typical wind prone areas of southeast Wyoming. Gusts up to 50 MPH can be expected, with an occasional gust to 55 MPH possible. In-house guidance gives about a 40 percent chance of high winds at Arlington, Bordeaux, and the South Laramie Range, however, marginal events like this tend not to verify in El Nino conditions. The shortwave will also bring increased cloud cover, likely in the form of high clouds and some mountain waves from strong winds. The windy conditions will also lead to a warm day across the eastern half of the CWA. Downsloping winds will help raise temperatures into the 60s and low 70s, which is about 10 to 15 degrees above average for this time of year. Winds will ease during the evening hours, once again leading to quiet overnight conditions.

LONG TERM /WEDNESDAY THROUGH SUNDAY/

Issued at 151 PM MST Mon Nov 9 2026

Wednesday...Dry northwest flow aloft prevails, with slightly cooler temperatures compared to Tuesday based on 700 mb temperatures. Breezy to windy conditions based on the low and mid level gradients.

Thursday...As a ridge aloft moves further eastward across Wyoming and 700 mb temperatures rise to near 6 Celsius, a warming trend will begin with high temperatures from the upper 50s to upper 60s.

Friday...Ridging aloft moves overhead centered from western North Dakota to eastern Colorado, with maximum temperatures similar to those of Thursday.

Saturday...A progressive negatively tilted shortwave trough aloft moves into western Wyoming, spreading increasing mid and high level cloudiness across our counties, with low POPS across southern Carbon County, for rain and snow showers, including the Snowy and Sierra Madre Ranges. Slightly cooler with the increase in cloud cover.

Sunday-Monday...West to southwest flow aloft prevails, and with minimal low and mid level moisture, chances for precipitation will be limited. Maximum temperatures will be similar each day, from the mid 50s to mid 60s.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 1025 AM MST Mon Nov 9 2026

Westerly flow aloft will prevail, with a weak and dry weather disturbance moving across Wyoming Tuesday morning.

High confidence in VFR prevailing with scattered clouds near 15000 feet. Winds gusting to 32 knots at the Wyoming terminals until late this afternoon or early this evening, with winds gusting to 30 knots at Wyoming and Nebraska terminals after mid morning Tuesday, due to surface pressure gradients.

CYS WATCHES/WARNINGS/ADVISORIES

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