839
FXUS65 KRIW 020642
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1242 AM MDT Sun Nov 2 2025

.KEY MESSAGES...

- Gusty winds today, generally 30 to 40 mph across the central mountains
  and from South Pass to Casper. Stronger winds around 50 mph
  around Red Canyon over South Pass and Outer Drive in Casper.
  Winds decrease late afternoon and into tonight.

- Above normal temperatures in the mid-50s to mid-60s continue today,
  as well as through the rest of the week.

- Gusty winds continue for portions of the area Monday and
  Tuesday, with Tuesday also having rain/snow chances (20%-45%)
  over northwest Wyoming.


&&

.DISCUSSION...
Issued at 1241 AM MDT Sun Nov 2 2025

Wind is the main forecast element today. Gusty winds 30 to 55
mph are ongoing across the Absaroka and eastern Wind River
Ranges, with some isolated gusts above 50 mph in the Absarokas,
around the Clark area. These winds continue into Sunday morning,
but should decrease some after sunrise from north to south.
Gusts 20 to 40 mph then occur through the rest of the day,
finally coming to an end Sunday night.

The other windy location is the Wind Corridor from around South Pass
to Casper. Generally wind gusts are 30 to 40 mph, though wind prone
locations (like Red Canyon of South Pass and Outer Drive in Casper)
are seeing stronger winds to around 50 or 55 mph. These winds
continue longer than over the mountains, through mid-afternoon. The
gusty winds end Sunday night. Elsewhere, gusty winds will occur
today, with many lower elevations seeing gusts 15 to 30 mph this
morning and afternoon.

A little moisture, aided by some shortwave energy, could bring a few
light snow/rain showers over northwest Wyoming (and the Bighorn
Mountains) today, primarily between 9am and 11pm MST, though some
could linger in the Yellowstone area a few hours longer.

Monday brings increasing gusty winds again, though will be less than
today. Dry air will also limit any chances for precipitation.
Another embedded shortwave moves through for Tuesday, continuing the
breezy conditions and bringing rain/snow chances (20%-45%) across
northwest Wyoming. This system is quick and relatively unimpactful.
Wednesday is a transition day as a quick moving ridge passes over,
keeping the mild temperatures over the area. A more potent system
arrives as early as late Wednesday, though could slow down more into
Thursday. This system looks to mainly bring snow to the western
mountains Thursday and Friday, though also brings low rain chances
across the area for Friday.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 935 PM MDT Sat Nov 1 2025

All terminals to be VFR through the forecast period. Gusty west
to southwest wind is the primary hazard into Sunday. The most
persistent wind will be at KCPR and KCOD, where wind gusts to
and over 25 knots will remain possible through most of the TAF
period. Light wind will be found at other TAF sites through
around 15Z on Sunday. West to southwest wind then increases from
west to east as a trough passes by to the north of Wyoming.
Gusts to around 20 knots or higher will be possible at all TAF
sites with the exception of KWRL. Strong wind aloft may bring
wind shear in vicinity of KCOD until around 15Z Sunday. An
isolated shower (around a 1 out of 5 chance) may occur in the
northern mountains between 18Z and 23Z on Sunday, but any
showers should stay away from TAF sites. Wind should decrease
after around 01Z Monday as the pressure gradient decreases and
wind decouples.

Please see the Aviation Weather Center and/or CWSU ZLC and ZDV
for the latest information on smoke, icing, and turbulence forecasts.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Wittmann
AVIATION...Hattings