textproduct: Cheyenne

KEY MESSAGES

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

- Breezier winds will continue through this morning and return Tuesday; however, critical fire weather conditions are not anticipated at this time.

SHORT TERM /THROUGH TUESDAY NIGHT/

Issued at 202 AM MST Mon Nov 9 2026

Another pleasant day is on deck as we sit firmly under upper level ridging that will continue to dominate our weather conditions in the short term period. This pattern will keep any precipitation chances out of our forecast area, bringing partly cloudy skies along with mild temperatures. So, expect high temperatures later 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. Lows Monday night will mainly bottom out into the mid/upper 30s to low 40s, a few valleys west of I-25 may see lows tank into the low 30s. Now lets take a look at winds, this morning will continue to be a bit breezier for our wind prones along I-25 and I-80. The mid- level flow at 700 mb will be westerly in the 35 to 45 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 this morning which translates to gusts at the surface on the order of 40 mph. As we head into Tuesday, a weak shortwave aloft will slide across the forecast area from a weak system that passes just to our northeast, we will remain dry as all model guidance indicates. Winds will once again be the main story as we see 700 mb winds ramp up into the 35 to 50 knot range by Tuesday morning. A surface low near the Black Hills will push east through Tuesday morning, as it does so, it will pull the surface trough east along with the gusty winds to wind prone adjacents by Tuesday afternoon. With ample subsidence, expect gusts up to 50 mph, but there is the possibility of stronger gusts in the known wind prones. Our in-house guidance indicates a slim chance for high winds, so this will continue to be monitored. Taking a look at temperatures, highs on Tuesday west of the Laramie Range look to top out in the mid 50s. While highs along and east of the I-25 corridor will soar into the mid to upper 60s. Lows Tuesday night will bottom out generally in the mid 30s.

LONG TERM /WEDNESDAY THROUGH SUNDAY/

Issued at 150 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 Wednesday, it 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 /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 424 AM MST Mon Nov 9 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 in general will be less than 10 knots, except the Wyoming terminals where breezier conditions will hold on a bit longer before subsiding by 23Z today.

CYS WATCHES/WARNINGS/ADVISORIES

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