textproduct: Cheyenne

KEY MESSAGES

- Near to or just above average temperatures and dry conditions are expected to continue into mid-week.

- Breezier winds return today into Monday; however, fire weather conditions are not anticipated at this time.

SHORT TERM /THROUGH MONDAY NIGHT/

Issued at 202 AM MST Sun Nov 8 2026

Rinse and repeat, another pleasant day is on tap with mainly sunny skies and mild temperatures as we sit under a bubble of high pressure bringing us benign weather. So, expect high temperatures this afternoon to top out slightly above average for this time of year. Locations along and west of the Laramie Range will see highs in the mid 50s to low 60s while many locations along and east of the I-25 corridor will see highs soar into the low 60s to mid/upper 60s. Warmest across far eastern Wyoming and in the Nebraska Panhandle where a few locations may see highs topping out around 70. Lows Sunday night will mainly bottom out into the upper 30s to low 40s, a few valleys west of I-25 may see lows tank into the low 30s. Switching gears a bit, today compared to previous days will be the noticeably different in regards to winds, it will be much breezier, especially in the wind prones. The mid-level flow will ramp up with 700 mb westerly winds increasing into the 35 to 40 knot range. With ample subsidence, negative Omega (GFS), these winds will make it down to the surface, especially along the higher peaks of the Laramie Range. This is confirmed by our in-house guidance where the height gradient between Craig and Casper reaches a max around 45 meters today into Monday. This translates to wind gusts at the surface on the order of up to 45 mph, just below High Wind criteria. As we head into Monday, the ridge aloft over the forecast area will flatten out as the upper level flow becomes zonal. In this, a weak surface front will dive south to southwest into the Laramie Range. This will keep winds gusty from the Laramie Range and points west. With the ridge being the dominant feature, we will continue to see above average temperatures Monday along with continued benign conditions. Therefore, highs on Monday west of the Laramie Range look to top out in the mid 50s to low 60s. While highs along and east of the I-25 corridor will soar into the mid to upper 60s. Lows Monday night will bottom out generally in the mid 30s.

LONG TERM /TUESDAY THROUGH SATURDAY/

Issued at 115 PM MST Sat Nov 7 2026

Warm and dry weather looks to continue for the forseeable future. A weak and moisture starved clipper system will traverse near the area on Tuesday into Wednesday. A few sprinkles or flurries will be possible, but only a small minority of ensemble members support any precipitation whatsoever for the region. Expect this to knock 700-mb temperatures down to the 0 to +2C range, while pulling the surface trough well east of the Laramie Range. This will allow breezy conditions to spread into the High Plains. Temperatures are expected to remain above seasonal averages, but with the cool down we should be a little closer to normal (perhaps 5 to 8F above average). While most will be breezy, high winds are fairly unlikely. In-house guidance shows probabilities around 20 to 30% for the typical wind prone areas.

Behind the departing clipper system, ensembles are in excellent agreement showing a highly amplified ridge building in over the Rockies Thursday into the following weekend. This feature will block or deflect any incoming storm systems, and push temperatures well above average once again. Since we'll be on the periphery of this ridge, temperature expectations are not too extreme. 700-mb temperatures around +4 to +6C are currently shown in the NAEFS mean, which is near the climatological 90th percentile. This isn't quite warm enough to support record highs, but expect temperatures at the surface to range a good 10 to 15F above seasonal norms. The strong ridge will likely also keep winds fairly light during this period.

AVIATION /12Z TAFS THROUGH 12Z MONDAY/

Issued at 424 AM MST Sun Nov 8 2026

VFR conditions will prevail across all terminals for the duration of this TAF period. High-level clouds will push through throughout the day, but will not pose any threat to aviation operations. Winds will become breezy between 17Z and 23Z today for a majority of the sites with gusts up to 25 knots.

CYS WATCHES/WARNINGS/ADVISORIES

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