American Falls, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

409
FXUS65 KPIH 230414
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
914 PM MST Sun Feb 22 2026

.KEY MESSAGES...

- Warmer temperatures peak tomorrow afternoon

- Rain, snow, and wind Tuesday and Wednesday

- Above average temperatures throughout the week

&&

.DISCUSSION...
Issued at 1225 PM MST Sun Feb 22 2026

Dry weather persists through tomorrow morning across eastern
Idaho. Even with the approaching storm and some increase in
higher clouds, we should see highs peaking tomorrow...at least
for the early part of the week. Highs in most lower valleys hit
45-55 tomorrow. By afternoon a few pockets of light rain and
snow cross the Salmon River into the central mountain. Tomorrow
night through Wednesday afternoon looks wet for a good chunk of
central and eastern Idaho, with windy conditions developing
tomorrow night and Wednesday. This storm, like most of our
storms this winter, will be on the warm side and focus, on the
Sawtooths/surrounding ranges, eastern highlands and Bear River
Range. While we may see some lighter snow accumulations between
6000-6500ft for that 48 hour period, most of the accumulation
will occur above 7500ft and highest amounts above pass level.
Where we are expecting all or mostly rain, upslope/downslope
impacts are expected. We have 0.10" or less for some of the
central mountain valleys and the upper end of the Snake Plain.
From Blackfoot south and west across the Snake Plain and Magic
Valley, we have anywhere from 0.15" to almost 0.50" (highest
across the Magic Valley). Similar amounts for the valleys south
of I-84 and I-86 are possible. There is a 10-20% chance of more
than 0.50" across those areas down low. The Wood For valleys
where some snow (3" or less) is expected (Island Park, Teton
Valley, Wood River Valley, and Stanley Basin), we are looking
for 0.40-0.80", with a 10-40% chance of exceeding 0.80". For
higher elevations in favored areas, we are looking 0.50-1.20" of
moisture (snow melted to water measurements). There is a 20-50%
chance of more than that across the Big Holes and around
Lionhead (including the Tetons), spine of the Sawtooths, and the
Bear River Range. Looking at snowfall totals, snowfall under
7500ft is limited to 6" or less over 2 days. Snowfall in the
mountains OUTSIDE of favored locations at/above 7500ft, is
generally 6" or less as well. For the Bear River Range, we are
currently looking at 6-10", 8-16" for the Big Holes and around
Lionhead, and 8-18" for the Sawtooths/surrounding ranges. Some
spots may try and push 2ft. The other factor with this event
will be wind, especially later Tuesday into Wednesday. Strongest
gusts in most areas will be 30-50mph, with a few spots
surpassing that. The winds right now are the driving factor for
potential headlines since snowfall is for 48 hours. We will hold
off on any headlines for the moment until we see if trends are
up or down in the next 24 hours.

Beyond that, the forecast is mostly trending drier. We do have
another system clipping the area on Friday, which will produce
more showers. The Blend of Models is showing some uncertainty
in terms of how wet or dry it might, but the overall trend is
drier. Friday looks like another windy, and we might actually
remain breezy through next weekend. Temperatures do dip a bit
with the incoming low, but still running above average. A
warming trend returns for the last half of the upcoming week.

&&

.AVIATION /06Z TAFS THROUGH 06Z TUESDAY/...
Issued at 912 PM MST Sun Feb 22 2026

High pressure remains over Eastern Idaho through tonight and the
beginning of Monday before low pressure off of the coast of
Washington begins to move inland and flatten the ridge enough to
allow Pacific moisture to begin moving into the area late Monday
into early Tuesday. We will see increasing cloud cover and
precipitation chances beginning around 09-12Z Tuesday, so have added
-SN to the TAFs for KSUN and KDIJ. Snow will likely hold off
until a bit later at KDIJ, but wanted to put the mention of it
before the end of the current TAF period for the heads up of
changing conditions expected early Tuesday morning. Will need to
add in more precipitation to the TAFs over the next few
issuances. Most precipitation will remain rain in the valley
locations of KBYI, KPIH, and KIDA on Tuesday.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Keyes
AVIATION...AMM