textproduct: Cheyenne

KEY MESSAGES

- A High Wind Warning is in effect for the usual southeast Wyoming wind prone area, Arlington and Bordeaux. Wind gusts of 55 to 65 MPH are possible.

- Drier and milder weather expected this weekend into early next week.

SHORT TERM /THROUGH SATURDAY NIGHT/

Issued at 327 PM MDT Fri Oct 16 2026

A cloudless, clear day continue across the area this afternoon. Temperatures have warmed into the 40s and 50s and will stay here for the remainder of the day. Overnight lows are not anticipated to be as cold as Thursday night. This is due to the flattening of the ridge aloft turning winds more westerly. The downslope component of the wind will keep overnight lows from tanking like they did Thursday night.

Winds will strengthen early Saturday morning as MSLP gradients steepen along and west of the Laramie Range. A surface trough in lee of the Laramie Range and a surface high over western Colorado will cause the tightening gradients. CAG to CPR 850 mb height gradients will also increase, reaching over 50 meters during the day Saturday. This is a good indication of potential high winds in the Arlington area. MSLP gradients across the area seem sufficiently strong enough to get high winds at Bordeaux as well. In-house guidance suggests a 40 percent chance of high winds occurring at Bordeaux during the day Saturday. As a result, went a head and upgraded the High Wind Watches for these zones to Warnings. High Wind Warnings are in effect from 6 AM to 7 PM Saturday. Given that these is minimal upper-level support for this event, high winds will likely be marginal, with the strongest wind gusts in the 55 to 65 MPH range. Winds are also likely to stay elevated overnight as gradients weaken slowly. Westerly winds will help play a role in the warm, above average temperatures expected on Saturday. Downsloping winds will aid 90th percentile 700 mb temperatures in achieving daytime highs in the 70s for areas east of the Laramie Range. To the west, highs in the 60s can be expected. Ample sunshine is once again expected for Saturday.

Looking at another warm and dry day on Sunday. Although still above average, temperatures will be cooler by about 5 to 10 degrees compared to Saturday. This is a result from the flattening ridge sending a cool front into the forecast area. Luckily, still looking at a mostly sunny day, making for a pleasant end to the weekend.

LONG TERM /SUNDAY THROUGH FRIDAY/

Issued at 327 PM MDT Fri Oct 16 2026

Mostly benign conditions to start the work week in the long term, but this pattern should begin to be broken up by a deep Pacific system that will encroach our region by the end of the forecast period. Monday starts with high pressure ridging mostly holding control of our forecast area, but a weakening upper level low will move across the Four Corners region and then just to our southeast through Tuesday afternoon. While mostly non- impactful, this feature will at least bring a very low end chance of some high elevation precipitation, along with a small bump in moisture. This influx of moisture will continue through the rest of the week as our upper level flow turns southwesterly while we sit between high pressure controlling the southeastern US and a deep Pacific system that will move inland by later Wednesday into Thursday. This feature will be the next noteworthy system to impact the forecast area as we see precipitation begin overspreading late Thursday into Friday and start another cooling trend that should persist into the weekend. For this forecast period, expect mostly similar temperatures day to day as highs will be around 6 to 12 degrees above normal, generally in the 60's to 70's, with lows similarly warm in the 40's. Any drop in temperatures would occur just beyond the long term after the Pacific system moves in, and the most impactful precipitation chances similarly just beyond this forecast time as well. Overall it should be a quiet period, but that will be ending by the weekend after next.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 1159 AM MDT Fri Oct 16 2026

VFR conditions and SKC expected over the next 24 hours. Main concerns would be gusty winds this evening and into the nighttime hours, primarily impacting WY terminals and KCDR with gusts between 20-30 knots from a southerly to southwesterly direction. Otherwise prevailing winds 10 knots or less.

CYS WATCHES/WARNINGS/ADVISORIES

WY...High Wind Warning from 6 AM to 7 PM MDT Saturday for WYZ106- 110. NE...None.