035
FXUS65 KCYS 091201
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
500 AM MST Sun Nov 9 2025

.KEY MESSAGES...

- Generally dry and quiet weather expected for much of next
  week. Locally strong winds expected for the southeast Wyoming
  wind prone areas late Monday and into Tuesday.

- Warming trend Monday through Wednesday with high temperatures
  returning to the upper 50s to upper 60s.

&&

.SHORT TERM /THROUGH MONDAY NIGHT/...
Issued at 300 AM MST Sun Nov 9 2025

Other than some low cloudiness and some aviation concerns
across portions of the western Nebraska panhandle, pretty quiet
weather expected today with dry conditions. Cooler than normal
airmass will remain in place for one more day with highs likely
remaining in the 40s for both southeast Wyoming and western
Nebraska. Coolest temperatures in the lower 40s likely for most
of western Nebraska as 700mb temperatures remain below -6c.
Intervals of mid to high clouds will start this afternoon as the
upper level ridge axis slides east into the eastern Great Basin
Region and the Intermountain West. Because of this, not quite
as cold tonight but still pretty chilly across western Nebraska
with low temperatures in the mid teens by early Monday morning.

The only forecast concern through early next week is locally
strong winds for the wind prone areas. Models continue to trend
higher with 700mb wind speeds, surface gradient, and 750mb to
600mb subsidence over southeast Wyoming. In-house wind guidance
has picked up on this trend with PROB 50+ knot winds now over
60% to 70%. Therefore, issued a High Wind Watch for all of the
wind prone areas along Interstate 80 and Interstate 25,
including Arlington/Elk Mountain, Bordeaux, and the I-80 Summit
and adjacent foothills for Monday evening through early Tuesday
afternoon. The lowest confidence is for the foothills of the
southern Laramie Range...and the highest confidence is for
Arlington/Elk Mountain west of Laramie. Can not rule out winds
gust up to 70-75 MPH in a few of these places late Monday
evening through early Tuesday morning.

Otherwise, a warming trend will begin Monday afternoon as the
upper level ridge axis flattens and moves into Wyoming in the
afternoon.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
Issued at 251 PM MST Sat Nov 8 2025

Temperatures rebound nicely after a cool weekend with highs soaring
back into the mid 50s to mid 60s, warmest across eastern Wyoming and
the Nebraska Panhandle. Lows will dip into the low 30s to low 40s,
expect these temps to hold firm through most of the long term
period. All this is due to an upper level pattern change with
ridging nosing back into the region as a deep low shifts off to the
east. As we progress in the long term, with ridging building in,
weather conditions will remain relatively benign with precipitation
chances near nil across the CWA through the long term period.

At the tail end of the long term, models are suggesting a deep
trough moving into and across the Intermountain West Friday and
into our CWA by Saturday morning. If this stays on track,
precipitation chances will increase along with another drop in
temperatures, essentially bringing in a pattern change.

&&

.AVIATION /12Z TAFS THROUGH 12Z MONDAY/...
Issued at 500 AM MST Sun Nov 9 2025

North to northwest flow aloft will continue into Sunday. Primary
Aviation concern will be low CIGS across portions of the northern
and central Nebraska Panhandle early this morning.

HAZARDS/WEATHER TRENDS: VFR conditions will prevail at all southeast
Wyoming terminals over the next 24 hours. Low MVFR CIGS will
continue at KCDR and KAIA. Confidence is trending lower than these
CIGS will reach IFR as they`ve lifted a few hundred feet since 06z.
Winds will be lighter today with a few gusts up to 25 knots possible
across western Nebraska.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...

WY...High Wind Watch from Monday evening through Tuesday morning
     for WYZ106-116-117.
     High Wind Watch from Monday afternoon through Tuesday
     afternoon for WYZ110.
NE...None.

&&

$$

SHORT TERM...TJT
LONG TERM...RZ
AVIATION...TJT