223
FXUS65 KPIH 221129
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
429 AM MST Sat Nov 22 2025

.KEY MESSAGES...

- Dense Fog Advisory through 10AM this morning for many.

- Remaining dry through the weekend before Monday cold front.

- Unsettled conditions may continue through the Thanksgiving holiday,
  but no significant impacts are expected at this time.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 315 AM MST Sat Nov 22 2025

Another morning of low stratus and visibilities down to a quarter of
a mile or less in locally dense fog. The Dense Fog Advisory remains
in effect through 10 AM MST this morning for the Snake River Plain,
eastern Magic Valley, Montana Divide region, Teton Valley, Shoshone
region, and Arco/Mud Lake Desert. Anyone traveling now through later
morning should be prepared for the possibility of slick spots on
roadways and sudden reductions in visibility.

If the stratus manages to clear early enough this afternoon, daytime
temperatures should be able to warm into the mid-40s across our
valleys, which is just a touch warmer than yesterday`s highs. Models
indicate less dense stratus and fog tonight into Sunday morning, so
overnight temperatures are expected to run a bit colder.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Issued at 155 PM MST Fri Nov 21 2025

The next shortwave feature arrives late Sunday through early
Tuesday, with cold front passage during the day Monday. Current NBM
means increase the winds along and behind the front to between 25
and 30 mph with gust potential over 40 mph. Light precipitation
appears mainly confined to higher elevations at this time. Cooler
temperatures follow Tuesday, with lower elevation highs dropping
into the 30s. For the holiday period, models are showing signs of
shifting gears again. Although the ensemble clusters agree on a
ridge through the western states, some of the deterministic runs are
a bit flatter with the flow aloft, leading to energy pushing through
the PacNW and producing light precipitation across the northern tier
states. Temperatures remain mostly mild, which would keep snow
generally above valley floors, and thus limiting impacts for holiday
travel concerns for Wednesday through Friday. At least for now.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 429 AM MST Sat Nov 22 2025

Terminals range all flight categories this morning with CIGs as low
as 100 feet. Many of the sites are experiencing fluctuations in
flight categories due to either alternating from SCT to BKN clouds
or being on the periphery of the stratus. At this time, VIS is
remaining 6SM or greater. Improvement is expected to be very gradual
beginning around 18z, with MVFR CIGs not forecast until between 21z
and 00z this afternoon. Models show less chance of widespread low
stratus and fog tonight.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 10 AM MST this morning for IDZ051>055-
065>067.

&&

$$

SHORT TERM...Cropp
LONG TERM...DMH
AVIATION...Cropp