621
FXUS65 KPIH 130325
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
925 PM MDT Mon Oct 12 2026

.KEY MESSAGES...

- Raw & Chilly Through Tuesday: A deep upper-level trough will
  keep dense cloud cover, additional light precipitation, and
  unseasonably cool temperatures locked over eastern Idaho, with
  daytime highs limited to the 40s and 50s.

- Late Week Ridge & Pleasant Next Weekend: High pressure ridging
  brings clearing skies and temperatures warming to seasonal
  norms by Thursday and Friday, setting up a much more pleasant
  weekend.

&&

.DISCUSSION...
Issued at 115 PM MDT Mon Oct 12 2026

The second surge of moisture has largely come to an end and thus we
have cancelled the Flood Watch as flood risk has ceased. Light
precipitation will continue to fall through late Tuesday,
predominantly across the south hills, southeast highlands, and
portions of the central mountains, where roughly another 0.25" to
half an inch of additional liquid accumulation is forecast over the
next 24 hours. The highest elevations of the central mountains and
south hills will likely receive localized amounts of 1" to 4" inches
of snow accumulation.

We will continue Frost/Freeze headlines for the next couple of
mornings. While National Blend probabilities do not show strong
support for widespread sub-freezing temperatures, area observations
indicate widespread temperatures dropped into sub-freezing range
across our growing zones south and west of Idaho Falls. That
said, cloud cover will continue to be a limiting factor
tonight/early Tuesday morning. Any sub-freezing temperature will
likely be short- lived before a quick return to the low to
mid-30s. Once clouds clear, we anticipate widespread sub-
freezing temperatures Wednesday morning with an end to the
growing season also expected.

While early morning low temperatures will run coldest Wednesday
morning, daytime temperatures will continue to warm through the
duration of the extended period as high pressure builds over the
region from the west. Temperatures today will start out around 15
degrees below normal with widespread 40s, warming to several degrees
above normal into the 60s by early next week.

&&

.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 925 PM MDT Mon Oct 12 2026

Rain showers moving up from the south will produce mostly MVFR
conditions overnight. DIJ is IFR and near minimums. Most other
locations are expected to remain MVFR. There is a 30% chance
that they could fall to IFR. SUN should be far enough north to
not see any restrictions tonight.

&&

.FIRE WEATHER...
Issued at 137 PM MDT Mon Oct 12 2026

Will see showers continuing through Tuesday with zones 427,
410,411, and 413 seeing the showers continuing the longest
through the day. Expect much quicker drying in zones 475 and
476. Expect dry conditions and warming Wednesday through Sunday
as this long lasting wet system finally moves out of the area.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Freeze Warning from 4 AM to 9 AM MDT Tuesday for IDZ051-052-
054-055.
Frost Advisory from 4 AM to 9 AM MDT Tuesday for IDZ053.

&&

$$

DISCUSSION...Cropp
AVIATION...13
FIRE WEATHER...GK