American Falls, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

645
FXUS65 KPIH 142331
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
431 PM MST Wed Jan 14 2026

.KEY MESSAGES...

- Dry weather expected through at least the middle of next week

- Limited potential for fog or stratus

- A slight cooldown expected but temperatures still at or just
  above average

&&

.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 1226 PM MST Wed Jan 14 2026

We are going to see a slight shift in the pattern heading toward
the weekend. The ridge shifts westward a bit, allowing for the
flow to become northerly. That will produce a slight cooling
trend over the next couple of days. We actually we even see some
wind mainly along the Divide and across the central mountains,
especially where may get some localized drainage winds into the
Snake Plain. At this point, it likely isn`t enough to scour out
any inversion conditions totally...especially away from the
Divide. By Friday, we shouldn`t many areas hitting 40 or the low
40s except across the Magic Valley and south toward the Utah
border. Interestingly enough, this will likely be a situation
where we`ve had stronger inversions that temperatures warm up a
small amount while other areas cool off a bit. That said,
overall temperatures will remain at or just above average. In
terms of any fog or low clouds, we did see a bit more of that
this morning...but it will still pretty isolated. We did keep
that trend in the forecast for tonight and tomorrow night,
although we may need to trim that back. A couple of lows will
try and clip the Divide with the pattern shifting west, but it
should remain dry. It is NOT out of the question to see a brief
snow shower or flurries around Island Park, but if it happens it
will not be anything impactful at all. The chance is so low, it
doesn`t show up in the forecast.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Issued at 1226 PM MST Wed Jan 14 2026

We will remain in north or northwest flow into early next week.
We still have the potential with any low clipping the Divide to
see a few flurries around Island Park, but nothing measurable
or impactful is expected. It is also appears with the ridge
slipping west, the potential for any fog or stratus decreases
again. We will have to wait and see if that rends back the other
way. Temperatures appear to rebound a bit, but no major warm up
is on tap for us...just likely to see a few more spots back
into the lower 40s. In terms of when it MIGHT rain or snow
again, we are still an overall pattern change by the middle of
next week. The Blend of Models brings some light precipitation
into the mountains Wednesday. However, the trend has been to
decrease that chance. If and when we see some precipitation
around here likely holds off until Thursday or later.

&&

.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 425 PM MST Wed Jan 14 2026

High pressure is keeping skies aloft clear with the threat of
early morning fog or stratus at KIDA, KPIH, KBYI. KIDA is under
the most impacts with possible 1/4SM and OVC001, otherwise IFR
risk at the other two airdromes. KSUN appears to be above the
fog and stratus, while KDIJ appears to have no issues.

&&

.AIR QUALITY...
Issued at 1226 PM MST Wed Jan 14 2026

An AIR STAGNATION ADVISORY remains in place for the Pocatello area,
our side of the Cache Valley, and south of Malad toward Samaria. We
will continue to see limited mixing and lighter winds for the next
several days. Something to watch will be the ridge shifting back
to the west, and northerly flow picks up a bit across central
and eastern Idaho. Whether that is strong enough to kick up any
wind or mix out inversions and "clear" the air remains to be
seen. We will not look at extending/canceling the headline until
we see how things trend in the next couple of days.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Air Stagnation Advisory until noon MST Sunday for IDZ054-059.

&&

$$

SHORT TERM...Keyes
LONG TERM...Keyes
AVIATION...Messick
AIR QUALITY...Keyes