508
FXUS65 KPIH 140002
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
602 PM MDT Sun Sep 13 2026

.KEY MESSAGES...

- Incoming low will maintain very windy conditions in portions
  of the Snake River plain through early evening.

- Low brings a slight chance of precipitation to the eastern
  highlands tonight.

- Low also brings even more cooling from today to Monday.

&&

.DISCUSSION...
Issued at 246 PM MDT Sun Sep 13 2026

Winds remain the main story of the day as gusts continue to
increase especially across the northern half of the Snake River
Plain this afternoon. Wind Advisory remains in effect for Zones
52 and 67 (Arco/Mud Lake and Beaverhead/Lemhi regions) until
early evening, with winds diminishing below 30 mph during the
evening but remaining breezy overnight. Weak feature rotating
around the center of low to the west times out to pass through
East Idaho this evening into the overnight. CAMs have picked up
on potential for light showers across the eastern highlands late
this evening, shifting east out of the state by sunrise.
Daytime temps remain cool today compared to previous days, but
deepest cooling arrives Monday with temperatures dropping into
the mid to upper 60s for most.

East Idaho remains under the influence of trough to the west for
much of the week. Gradual warming trend will be in place with
dry conditions into mid week. By Thursday, next low feature
shifts toward the region, and models are depicting trajectory
similar to current low. East Idaho could see precipitation
develop for Thursday and Friday, along with another round of
breezy winds.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 535 PM MDT Sun Sep 13 2026

Expect VFR conditions for all TAFs sites through the period.
Winds are starting to drop. But the lighter winds will be short-
lived early this evening. Another burst of wind is expected
around midnight tonight as a second push of cold air arrives as
an upper trof moves through. Expect gusts of around 20 to 30
mph overnight, mainly after 4 to 6Z. Breezy winds will continue
into tomorrow afternoon before dropping off by mid to late
afternoon into the early evening tomorrow. May see a period of
showers at DIJ with the upper trof after 06Z this evening as
well but still VFR conditions are expected. Look for skies to
become clear by early tomorrow morning for all TAF sites.

&&

.FIRE WEATHER...
Issued at 246 PM MDT Sun Sep 13 2026

Strong wind gusts the main impact this evening mainly in zone 410
and 411 which will die down after sunset.  Most minimum humidities
are above 15 percent.  Will see occasional gusts up to 30 mph return
after midnight through Monday morning as a second push of cold air
and the upper level trof moves through.  Humidity will be well above
15 percent on Monday though.  Will be much cooler Monday with a
warming trend beginning again on Tuesday.   Next chance for more
widespread showers will be on Thursday as strong southerly flow
aloft pushes moisture into Idaho.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 7 PM MDT this evening for IDZ052-067.

&&

$$

DISCUSSION...DMH
AVIATION...TW
FIRE WEATHER...GK