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 152 PM MST Sun Nov 8 2026

Upper level ridging is still the dominant pattern in the short term forecast. On satellite, low to mid altitude clouds are starting to fill in for the Pacific Northwest as the upper low inches closer to the coastline. While low clouds aren't expected here, the skies over Southeast Wyoming will slowly start to become cloudy throughout the day Monday. Winds are also going to be rather breezy as well. That same system will push against our ridge and tightens the height gradient across the Intermountain West. The Craig to Casper gradient still looks to be around 45 to 47 meters for elevated wind conditions for our Wind prones. 700mb wind speeds look to be around 35 to 40 knots starting early Monday morning. With the synoptic winds from a Westerly direction there will some downsloping to potentially keep most areas warmer on Monday as well. The global model Omega fields also show a kind of mountain wave pattern that may exceed model surface winds especially in our wind prone areas along I-80 and I-25. Our in-house algorithm depicts a decent chance for elevated to potentially high winds along our wind prones. Other than that temperatures look to be in the 50's and 60's in the higher elevations west of I-25 but in the elevations to the east some areas will be in the mid to upper 60's. Chadron may actually have temperatures in the upper 50's due to upslope easterly winds over the Pine Ridge area. Overnight temperatures look to be in the 30's and 40's tonight and Monday. This is mostly due to the expected downsloping winds expected to occur over the next 36 to 48 hours.

LONG TERM /TUESDAY THROUGH SATURDAY/

Issued at 152 PM MST Sun Nov 8 2026

Warm and dry weather is expected to continue for the rest of the operational forecast period. Picking up on Tuesday, we will have a little bit to talk about as a clipper system passes just to our northeast. Models are in good agreement keeping the system to our north meaning nearly all ensembles are totally dry for the forecast area. On the south side of the upper level shortwave, we can expect to see 700-mb winds creep up Tuesday morning. A surface cyclone will lead the upper level low developing over the Black Hills region Tuesday morning. By the afternoon hours, expect this feature to pull to the east, dragging the surface trough eastward away from the Laramie range, and thus pulling gusty west to northwest winds across the area into the High Plains. Most areas can expect maximum gusts in the 35 to 45 mph range, but there is a chance for high winds in the typical wind prone areas. Craig to Casper 700 and 850-mb height gradients are around 45 to 50 meters, which is just on the low side for high wind events. In house guidance now gives each of the wind prone areas about a 40% chance for high winds, so this will be one to watch. The best window is late Tuesday morning through about sunset. Very dry air will also mix through the atmosphere, producing at least elevated fire weather conditions. Despite modest cool air advection through the day, we should still see temperatures climb to about 10F above seasonal averages, generally in the 60s for the plains and mid to upper 50s in the valleys west of the Laramie range.

Wednesday will remain breezy, but gusts should be more in the 25 to 35 mph range. Northwest flow will persist aloft behind the departing shortwave trough. 700-mb temperatures in the 0 to +2C range will support highs closer to average, but still on the warm side. Wednesday will be the coolest day of the week, with upper 50s to lower 60s anticipated for the plains, and mid 50s for the valleys west of the Laramie range.

A strong ridge amplifying to our west will encroach on the area Thursday into the weekend. Expect a gradual warming trend Thursday and Friday, with 700-mb temperatures peaking around +5 to +7C Friday. High temperatures will remain about 10 to 15F above seasonal averages. The ridge is expected to flatten out a bit over the weekend. 700-mb temperatures drop slightly, and thus daytime high expectations are a few degrees cooler than Friday for Saturday and Sunday, but still warm for this time of year. Overall, it should be a pleasant weekend. Portions of Carbon, Converse, and Albany counties could be breezy, but nothing remotely unusual for this time of year. With little to no precipitation expected anywhere in the area for the next 7 days, it is tempting to look beyond the operational forecast period for some hints at a pattern change. Ensembles continue to kick the can down the road and push the potential change further out, but most are showing the longwave Pacific trough moving inland into the western CONUS by the weekend. If this occurs, the door to potential storminess may open again in the November 16 to 19 period. About 60% of ensembles show a storm system passing through our area during this period, while 40% remain mostly dry.

AVIATION /00Z TAFS THROUGH 00Z TUESDAY/

Issued at 450 PM MST Sun Nov 8 2026

Upper level ridge axis will weaken into Monday as a weak cool front slides south into the high plains. Other than some high cloudiness, quiet weather will continue through Monday afternoon.

HAZARDS/WEATHER TRENDS: VFR conditions expected over the next 24 hours. Winds will become light and variable this evening before shifting into the north early Monday morning as the weak cool front moves south over the high plains.

CYS WATCHES/WARNINGS/ADVISORIES

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