095
FXUS65 KPIH 301928
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
128 PM MDT Sat May 30 2026

.KEY MESSAGES...

- Wet weather today for much of east Idaho, remaining dry across
  central Idaho.

- Lake Wind Advisory in effect for the American Falls Reservoir
  for today.

- Chilly weather over the weekend into early next week.

&&

.DISCUSSION...
Issued at 128 PM MDT Sat May 30 2026

Upper trough ejecting northeast through East Idaho today, with
main low over SW Wyoming early this afternoon. Wrap around
moisture producing solid area of rainfall across the eastern
highlands and northern portions of the Snake Plain. Per
observations, rainfall gradient lies roughly from Challis to
Pocatello to Bear Lake. Within the heaviest precipitation so
far, totals have already exceeded one-half inch in some
locations. Band of rainfall expected to rotate west, then shift
north through the remainder of the day, but still mostly remain
east of the aforementioned gradient line. Liquid QPF amounts
still look similar to previous forecasts. Breezy winds continue
especially from the Lower Snake River Plain west through the
Magic Valley. LAKE WIND ADVISORY remains in effect for American
Falls Reservoir, but winds remain just shy of WIND ADVISORY for
the Eastern Magic region. Rainfall continues across the
northeast corner through early Sunday as the upper trough
continues to pull away. Residual moisture and proximity to the
low may be enough for isolated to scattered showers and
thunderstorms mainly across the north Sunday afternoon, then
again Monday afternoon. Temperatures Sunday night/Monday morning
will be coolest, and may be close to a FROST ADVISORY for
northern zones.

There is increasing confidence that a shortwave feature moving
through the mean flow will have the potential to produce showers
and thunderstorms, mainly across the northern zones into Montana
for both Wednesday and Thursday. Breezy winds will be possible
as well for Thursday. The rest of the week looks dry with
temperatures returning to the 80s for Tuesday and beyond.

&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
Issued at 1149 AM MDT Sat May 30 2026

A low pressure system will continue rotating northeastward through
WY today as wraparound moisture filters into eastern Idaho through
late tonight/early Sunday. KDIJ will see wx impacts through late
Sunday morning. MVFR CIGs and VIS are forecast in moderate rain at
KIDA and KDIJ. Too little confidence in MVFR conditions at KPIH or
IFR at the aforementioned sites to included in the forecast. Best
chance of thunderstorms this afternoon will be further northwest in
the KSUN region and have therefore included a PROB30 for -TSRA
through 24z. Outside of storms, westerly winds will remain breezy
through the period with gusts ranging 20 to 30kts at KPIH and KIDA
and up to 35 kts at KBYI.

&&

.FIRE WEATHER...
Issued at 210 AM MDT Sat May 30 2026

Wetting rains are likely across much of East Idaho today. Parts
of the Central Idaho Dispatch could see wetting rains as well.
South Idaho Dispatch will most likely stay mostly dry with gusts
to 30 mph likely across much of the Magic Valley today. Drier
air will work into the region on Sunday with gusts to 25 mph
will likely across much of South Idaho.

&&

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

&&

$$

DISCUSSION...DMH
AVIATION...Cropp
FIRE WEATHER...13