271
FXUS65 KPIH 210919
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
319 AM MDT Mon Sep 21 2026

.KEY MESSAGES...

- Mild conditions this week. Best chance of precipiation through
  the week Tuesday and Tuesday night into Wednesday morning.

- Above normal temperatures expected Wednesday through the
  weekend.

- Possible breezy to windy conditions Friday

&&

.DISCUSSION...
Issued at 242 AM MDT Mon Sep 21 2026

Not expecting impactful weather today but will see continuing
warming trend as upper level ridge moves over Idaho by late
morning into afternoon. No precipitation expected today with a
continued warming trend and high temperatures in the 70s
valleys and 60s and 70s higher elevations as closer to normal
readings return. Ridge moves east Tuesday with southerly flow
aloft returning which will increase the moisture content and
will have the main precipitation event for the week most likely
Tuesday into Wednesday. This will likely not be a significant
rain producer with the highest QPF in the southern and eastern
mountains along with the highest probability. Only slight
chances to chances elsewhere. Beyond Tuesday will have mainly
dry and warm conditions Wednesday through next Monday with above
normal temperatures expected with many low elevations into the
80s both Thursday and Friday. An upper level trof passing to
north Friday may bring breezy to windy conditions.

&&

.AVIATION /06Z TAFS THROUGH 06Z TUESDAY/...
Issued at 1021 PM MDT Sun Sep 20 2026

Expect VFR conditions through the period for all TAF sites. Weak
high pressure will bring mostly clear skies and overall light
winds for most TAF sites. The exception will be DIJ. There is
some lingering moisture over the area, which is bringing a
BKN070 foot deck. Expect this to mostly clear overnight into
tomorrow morning. The clearing will be brief. With heating, DIJ
will see a SCT to BKN 070 to 080 foot deck in the afternoon.
Then, expect clearing skies by early evening for DIJ. BYI, SUN,
and, to a lesser degree, PIH will see upper level clouds
starting moving into the area by the early evening tomorrow as
an upper level low approaches from the southwest.

&&

.FIRE WEATHER...
Issued at 242 AM MDT Mon Sep 21 2026

Dry conditions today with continued warming trend. Best chance
for showers and isolated thunderstorms this week will be Tuesday
through Tuesday night. Best chances in zones 427, 413, 410 and
411. Not expecting significant precipitation with the system.
General trend through the week is continued warm temperatures
through the weekend with well above normal conditions Thursday
and Friday. Friday will also bring the likely strongest winds of
the week as a system moves through to the north and may drag
through a week cold front. Overall, not expecting significant
impacts through the week, only some low level issues are
expected.

&&

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

&&

$$

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