637
FXUS65 KRIW 040837
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
137 AM MST Wed Nov 4 2026

.KEY MESSAGES...

- A weather system to the south of WY brings periods of clouds
  and rain shower chances (20-30%) to Lincoln and Sweetwater
  Counties through the day today. Little to no impacts expected
  with these showers.

- Overall dry conditions and light winds with seasonable
  temperatures continue through the rest of the week. Above
  normal temperatures expected starting Sunday into the middle
  of next week.

&&

.DISCUSSION...
Issued at 121 AM MST Wed Nov 4 2026

Conditions remain quiet this morning, as high clouds have moved over
areas west of the Divide in the last several hours since Tuesday
evening. These are due to a closed low pressure system that is
moving over northern UT currently and will continue to track
eastward through the day today. Isolated light rain showers will be
possible along and south of a Afton-to-Rock Springs line this
afternoon as this system moves over CO. Little to no impacts will
occur due to a lack of instability and any possible measurable
precipitation is likely to occur closer to the low center over
southern Sweetwater County. Otherwise, conditions will be benign
across the CWA with seasonal temperatures and light winds. These
conditions will be in place again Thursday as an area of high
pressure shifts over eastern MT/the weather Dakotas. Above normal
temperatures will return for much of Johnson County as a result.

A trough will move over the region on Friday, shifting the area of
high pressure over the Dakotas and Upper Midwest. No significant
impacts are expected with the passage of the trough, however the GFS
is progging a low chance for rain over northern portions. A broad
ridge will then build over much of the Intermountain West and extend
over the Northern Rockies by Saturday keeping conditions dry.
Temperatures then trend above normal across the CWA by Sunday and
remain in place through the middle of next week as the ridge folds
over. Conditions also look to stay dry through this period, with a
weak trough possibly moving over the area on Tuesday.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 930 PM MST Tue Nov 3 2026

VFR conditions expected at all TAF sites for the entirety of the
period. Mainly high clouds throughout the period, with lower mid
level ceilings at KRKS by 12Z with a few passing showers to the
west, carrying VCSH (<10%) through 15Z. Thereafter, upper level
clouds remain into Wednesday night. Light winds throughout
10kts or less, lighter after sunset by 00Z Wednesday evening.
Otherwise, mainly dry with no other weather elements expected.

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

&&

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

&&

$$

DISCUSSION...LaVoie
AVIATION...Lowe