Elk Mountain, Wyoming Weather Forecast Discussion

479
FXUS65 KCYS 262017
AFDCYS
Area Forecast Discussion
National Weather Service Cheyenne WY
217 PM MDT Fri Sep 26 2025
.KEY MESSAGES...
- An upper-level ridge keeps the region drier today through the
  weekend with temperatures warming back into the 70s and 80s.
&&
.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 215 PM MDT Fri Sep 26 2025
An upper level ridge will keep things dry as the upper level low
passes the Intermountain West to the north. The upper level flow is
expected to be for the southwest injecting a finger of moisture
across the southern portion of the Southeastern corner of Wyoming.
This will likely lead to some increased cloud cover near the
mountainous areas but with the stout dry layer at the surface no
precipitation is expected. RH values remain in the mid-20s for
Saturday with light winds so no fire products will be issued.
However, wind gusts up to 30 mph can`t be ruled out for the
Panhandle as the upper level low continues to push east tightening
the pressure gradient against our ridging pattern. 700mb
temperatures continue to be in the 10 10 12C range for Saturday
translating to another day of temperatures in the 70`s will a few
areas potentially hitting the 80`s.
&&
.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 215 PM MDT Fri Sep 26 2025
At the start of the long term, an upper level trough and associated
low over southern California will eject energy north into our CWA,
this coupled with GFS Omega fields indicating upward motion in the
atmosphere will increase chances of precipitation and the potential
of isolated thunderstorms for Sunday afternoon. This threat will
primarily be west of Cheyenne, mainly affecting our western forecast
zones that include Laramie, Arlington, and Rawlins. More of the same
on Monday, a trough pushes north through our CWA which increases
precipitation chances briefly during the late morning into the early
afternoon hours which will affect a similar area as the day before.
However, the expanse this time will cover more of the CWA and
include Cheyenne. Overall, chances of precipitation decreases
thereafter for the remainder of the forecast period. Pleasant
temperature at the start with highs in the mid 60s to lower 70s for
areas west of I-25 and the mid 70s to mid 80s east of the corridor,
with the warmest temperature across the Nebraska Panhandle. As we
progress through the long term period, we will see gradually cooler
temperatures each day and by Friday, expect highs to top out in the
mid 60s to mid 70s, with the warmest temps still across the Nebraska
Panhandle. Winds in general wont be much of a concern as gusts will
top out to near 30 mph, possibly stronger in a few isolated areas
especially the windier prone areas.
&&
.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1122 AM MDT Fri Sep 26 2025
An upper level disturbance will slide east across our CWA today, this
will bring back high-level clouds, around 20K feet, and stronger
winds. In general, expect surface winds to gust up to 25 knots,
locally higher, and then decrease this afternoon sometime after 00Z
for all terminals. High-level clouds are expected to stick around
through this TAF period.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&
$$
SHORT TERM...MM
LONG TERM...RZ
AVIATION...RZ

NWS CYS Office Area Forecast Discussion