486
FXUS65 KPIH 271122
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
522 AM MDT Tue Oct 27 2026

.KEY MESSAGES...

- Isolated showers linger today with passing shortwave.

- Afternoon highs cooler than yesterday, in the 40s to low 50s.

- Looking like a wet, chilly Halloween/weekend.

&&

.DISCUSSION...
Issued at 302 AM MDT Tue Oct 27 2026

The bulk of our precipitation from the cold front passing through is
moving farther into Wyoming early this morning, but a bit does
linger in the higher elevations of the upper Snake River Plain and
Eastern Highlands. We even had a convective line of rain/snow mix
move through the Monida Pass area with some lightning this morning.
But as this trough and cold front leave, we still have another weak
shortwave passing through later today. This won`t bring another well-
organized line through Eastern Idaho, but it will keep isolated
precipitation chances around, especially for this evening. Overall,
additional QPF today will stay below a tenth of an inch. Behind the
cold front, highs today will be in the 40s to low 50s for most.
Winds remain breezy in the upper Snake River Plain today with gusts
around 20 to 30 mph. Wednesday will be nearly a repeat of
today, though drier as we briefly return to southwesterly flow
aloft ahead of the next system as temperatures warm into the
upper 40s to mid 50s on Thursday afternoon.

An area of low pressure off of the coast of the PNW brings moisture
into Eastern Idaho for the weekend, but will begin to bring
precipitation back to us as early as overnight Thursday into Friday.
Deep troughing over much of the West pulls Pacific moisture into
Idaho on Friday, Saturday, and Sunday. This will keep our highs in
the 40s and 50s on Saturday, and 40s for Sunday and Monday. We will
continue to see how precipitation totals change over the next
several model runs, so stay tuned for those amounts as we get a
little closer to it.

&&

.AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/...
Issued at 521 AM MDT Tue Oct 27 2026

Trough and cold front are exiting the area this morning, but low
clouds remain at around DIJ and near IDA. So, while all sites are
VFR at the moment, there still is a 20 percent chance of MVFR CIGs
at DIJ over the next several hours. That chance is a bit lower,
likely closer to 10 percent, at IDA. While the organized moisture is
gone, a weak shortwave passing through today will keep around some
isolated shower chances, especially after 00Z this evening, so VCSH
has been added to the forecast. Low clouds seem likely again tonight
into Wednesday and if winds drop a bit more than expected, some
patchy dense fog will become more likely.

&&

.FIRE WEATHER...
Issued at 302 AM MDT Tue Oct 27 2026

Isolated showers linger in the higher elevations today behind the
trough and cold front that came through late yesterday into early
this morning. A weak shortwave will also pass through this evening
and bring an isolated rain chance back with it for parts of the
Snake River Plain. That said, additional QPF today looks to remain
light, less than a tenth of an inch and many will stay dry. Winds
stay breezy today with gusts around 20-30 mph in the upper Snake
River Plain and 15-25 mph elsewhere. Wednesday will be drier, but
highs stay in the 40s to low 50s both today and tomorrow. We warm
slightly on Thursday, but overnight Thursday into Friday we see the
return of light precipitation chances ahead of the next system that
brings more moisture to us for the weekend and another cool down.

&&

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

&&

$$

DISCUSSION...AMM
AVIATION...AMM
FIRE WEATHER...AMM