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 /00Z TAFS THROUGH 00Z WEDNESDAY/

Issued at 445 PM MST Mon Nov 9 2026

A potent upper level trough will quickly slide eastward into the high plains Tuesday afternoon. Dry conditions will continue with intervals of mid to high clouds. Windy conditions expected ahead of this trough for all terminals late Tuesday morning through Tuesday afternoon.

HAZARDS/WEATHER TRENDS: VFR conditions will persist through Tuesday afternoon. Winds will increase out of the west and northwest with gusts between 25 to 35 knots after 17z Tuesday, highest gusts for the southeast Wyoming terminals.

CYS WATCHES/WARNINGS/ADVISORIES

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