textproduct: Cheyenne

KEY MESSAGES

- Windy, mild, and dry conditions expected throughout much of the week due to a zonal flow pattern.

- Strong winds and cooling temperatures expected during the weekend.

SHORT TERM /THROUGH WEDNESDAY NIGHT/

Issued at 252 PM MST Tue Nov 4 2025

A windy but warm day continues this afternoon as strong zonal flow aloft dominates. Wind gusts of 25 to 40 MPH persist across most of the CWA, with the Arlington area even briefly hitting high winds earlier in the day. Downsloping winds have also contributed to the warm, well above average temperatures this afternoon. Most locations are currently in the 60s and 70s, with a few cities within a degree of tying the record high temperatures for the day. Winds will ease and temperatures will drop this evening as a cold front pushes across the CWA from the north. Behind the front, calmer and quieter conditions are expected overnight.

Weak upper-level ridging will begin to build over the Rockies on Wednesday, continuing to keep the region precipitation free for another day. Unfortunately, the ridge will not be enough to keep the wind away. Several weak disturbances moving through the ridge will lead to a windy afternoon and overnight. Winds aloft will strengthen to about 50 kts during the afternoon with good subsidence. It will be windy, but not high winds as in-house guidance does not show probabilities increasing until Wednesday night. Wednesday night, stronger MSLP gradients will cause winds aloft to ramp up to 55 to 60 kts with even stronger subsidence. In-house guidance shows roughly 50 to 60 percent probabilities for high winds overnight in the usual southeast Wyoming wind prones. Held off on any headlines for now to see further model guidance.

LONG TERM /THURSDAY THROUGH MONDAY/

Issued at 252 PM MST Tue Nov 4 2025

The long term remains active as we see multiple days in a row of strong to high winds from several systems moving across the region while also cooling us back down from our above normal temperatures back to near to possibly even below normal over the weekend. Thursday starts as a quick trough swings in during the morning and shifts ridging out of our area. This will cause temperatures west of the Laramie Range to drop back down to near normal with highs in the upper 40's to low 50's, but locations east of this will remain warm as we see 50's to mid 60's lingering through Friday. But the enhanced pressure gradient from this system will promote widespread 700mb winds in the 50+ knot range with favorable downward omega values bringing these speeds down to the surface. And then over the weekend strong winds continue as another quick moving trough swings down again on Friday, followed by a deeper Pacific low into Saturday, with potential high wind warnings all the way through Saturday, while temperatures are now expected to actually descend below normal for the weekend as these systems bring in a surge of colder Canadian air from northerly to northwesterly flow. Widespread highs in the CWA are expected to be stuck in the 40's to possibly very low 50's, with very cold morning lows in the teens to 20's Sunday morning. Meanwhile this pattern should set off some light precipitation on Thursday and again Friday into early Saturday, but with a lack of stronger moisture and forcing, expect any showers that can occur to be limited to the high terrain and mountains, with minimal accumulations of snow and/or rain/snow mix. Early next week we get our next round of ridging, with highs returning to near to above normal to start the week.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 1025 AM MST Tue Nov 4 2025

The main aviation concern this afternoon will be gusty winds. Wind gusts of 20 to 30 kts can be expected, with the potential for southeast Wyoming terminals to gust over 30 kts at times. Winds will ease this evening once the sun sets, leading to quieter conditions. VFR conditions are expected through the TAF period.

CYS WATCHES/WARNINGS/ADVISORIES

WY...None. NE...Red Flag Warning until 5 PM MST this afternoon for NEZ434>437.