textproduct: Cheyenne

KEY MESSAGES

- Near average temperatures and mostly dry conditions are expected through the rest of the work week.

- Warmer temperatures are expected to return this weekend with largely dry weather continuing.

SHORT TERM /THROUGH THURSDAY NIGHT/

Issued at 245 AM MST Wed Nov 4 2026

Mostly clear skies and light winds early this morning are helping to get our Wednesday off to a chilly start, with most locations below freezing. We still have some lingering humidity after Monday's storm system, which is leading to patchy fog formation, mainly in valleys west of the Laramie Range. This is not expected to be as consistent as the fog we saw last week, but don't be surprised to see some localized visibility reductions heading out this morning. While the area is largely clear now, cloud cover is expected to increase shortly as a compact upper level low cutting underneath the upper level ridge approaches the area. While most lift and moisture associated with this system, we may see some light showers / high elevation snow showers developing primarily in Carbon county as the system slides to our south today. The cloud shield may not cover the entire area, but expect those southwest of a roughly Douglas to Sidney line to be fairly cloudy today. Temperatures will be held slightly below seasonal norms as a result. Winds are expected to be light today.

On Thursday, our area will be in between successive weak upper level lows traveling underneath the messy ridge aloft. Look for more sunshine for much of the day, and temperatures a few degrees warmer than Wednesday (and near average). Ridging won't have much time to recover in between systems, so spiking temperatures are not expected this time. Cloud cover will start to increase Thursday evening in advance of the next upper level low / vort-max.

LONG TERM /FRIDAY THROUGH TUESDAY/

Issued at 245 AM MST Wed Nov 4 2026

The next upper level low will traverse across the region in the Friday or Friday night time period, but models are all over the place concerning what to do with this system. However, all scenarios are fairly low impact regardless of the exact track of the upper level low, which differs from just north of our area all the way to northern Mexico. About 25% of ensemble members (mostly from the GEFS) move the compact upper level low through our area, which would bring the potential for some light precipitation on Friday. Low end PoPs (15 to 20%) were introduced with this update to account for this possibility. With this bit of unsettled weather around, temperatures should remain fairly close to or slightly above seasonal averages Friday and Saturday.

Once that system moves through the area, models are in fairly good agreement showing clean ridging building back into the area. NAEFS mean 700-mb temperatures climb to the +6 to +8C range over much of the area by Sunday, above the climatological 90th percentile. Temperatures are expected to surge well above normal for Sunday, and remain there into the early part of next week. Look for highs generally in the 60s east of the Laramie range, and mid to upper 50s to the west. These values are about 10F above average. Precipitation chances look to remain minimal during this period. There is a slim chances (about 25%) for some elevated winds Sunday night or Monday as the ridge flattens out and the jet stream gets slightly closer to the area.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 427 AM MST Wed Nov 4 2026

Fog around LAR is producing LIFR conditions, though this expected to break up in the next few hours. After that, VFR expected for the forecast period. Look for plenty of mid to high level cloud cover today with generally light winds across the area.

CYS WATCHES/WARNINGS/ADVISORIES

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