570
FXUS65 KPIH 301156
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
556 AM MDT Fri Oct 30 2026

.KEY MESSAGES...

- Light to moderate rain with very high elevation snow today and
  tonight.

- A slight tapering off Saturday, then moderate to heavy rain
  and light snow in the mountains Saturday afternoon through
  Sunday night/Monday morning.

&&

.DISCUSSION...
Issued at 216 AM MDT Fri Oct 30 2026

Low pressure along the OR-WA coast will bring a deep south
southwesterly flow that will dredge up some subtropical moisture
and bring it far enough northward to bring showers to the
western parts of the forecast area, spreading eastward during
the afternoon and through the overnight. The low itself splits
with part of it moving inlands into central OR by Sun morning.
On Sat night moderate to heavy precipitation develops over the
southern portions of the Gem State, including high elevation
snow in the central Idaho mountains. Very little snow develops
outside of the central Idaho mountains, so the snow level will
lower to around 7000ft elevation. Rain and snow continues at
lower rates for Sun night.

The southerly airflow does bring in mild air and overcomes the
cloud cover to produce a solid warm up into the lower 60s for
the heavily populated Snake River corridor. However, the
continued thick cloud cover for Sun means much cooler
temperatures for the afternoon, about as cold as the previous
Thu. As the cold air moves in behind the low on Sun the
temperatures cool more, barely reaching the 50 degree mark in
lower elevations even along the southern border.

Not too much wind to speak of with this low, but some breezy to
windy conditions possible in south central Idaho on Sun/Sun
night.

&&

.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 552 AM MDT Fri Oct 30 2026

Coastal low is already pushing in showers from the south into
the KBYI area. This should spread and intensify during the day,
finally having an impact by the afternoon. At this point, it
will be mainly increasing chances of marginal VFR conditions at
all airdromes at some point in the late afternoon and evening,
finally staying that way. Only KDIJ has a chance at the very end
of the TAF time of having IFR due to VSBY, due to BR with -SHRA.
Only KPIH and KIDA appear to have a brief period of gusty S to
W wind before the heavier SHRA and BR move in.

&&

.FIRE WEATHER...
Issued at 216 AM MDT Fri Oct 30 2026

Rain and high elevation snow can be expected starting today and
continuing, off and on, through Sun night/Mon morning. Very high
humidity with only occasionally breezy to windy conditions
expected as the low crosses through the western states during
this period, tracking south of Idaho for its center.
Temperatures peak today, with some low elevations reaching to
around 60 degrees, but cooling for Sat and even more cooling
Sun. Some snow is possible at elevations down to around 7000ft
or so.

&&

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

&&

$$

DISCUSSION...Messick
AVIATION...Messick
FIRE WEATHER...Messick