Preston, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

192
FXUS65 KPIH 130017
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
617 PM MDT Thu Jun 12 2025

.KEY MESSAGES...

- Isolated to scattered showers and storms this afternoon ending
  after sunset.

- Isolated showers and storms in the central mountains and
  Montana Divide region on Friday.

- Above normal temperatures through the duration of the
  forecast period.

&&

.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 113 PM MDT Thu Jun 12 2025

Expect isolated thunderstorms this afternoon and early evening
in the southern mountains and near the Montana border with low
precipitation amounts expected. Main threat will be outflow wind
gusts to 40 mph and small hail. Strong southwest flow aloft
continues tomorrow but expect drier conditions and less
thunderstorm coverage again with again best chance near the
Montana border but current grids avoid any activity Friday. Lows
tonight in the 40s and 50s with highs Friday 70s mountains and
80s valleys. Lows Friday night again in the 40s and 50s. Expect
breezier conditions Friday with sustained winds in the 10 to 20
mph range especially northern parts of the Snake Plain and
towards the Montana border.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
Issued at 113 PM MDT Thu Jun 12 2025

By Sat, the thunderstorm threat has moved out of
everywhere but the extreme northeast end, even north of Island
Park. This shifting eastward means the upper level ridge builds
in for the weekend, and conditions return to well above normal
by Sun, temperature-wise. Sun now is the warmest day of the
week, with afternoon highs 12 to 17 deg F above normal. The
breakdown of this upper level ridge starts to develop Mon,
instead of Tue. However, this breakdown is not great, even by
afternoon, as all clusters have positive height anomalies. It
will be noted that the most advanced breakdown is the cluster
for just over 40 percent of the solutions. Even Tue and Wed are
not definitive on the breakdown of the upper level ridge with
only 52 percent of the solutions showing any neutral or negative
500mb height anomalies. This leads to a forecast of perhaps
some light showers and isolated thunderstorms mainly for
mountains and highlands, with little else going on except clouds
to keep temperatures near normal by Tue, which will be the
coolest day this week. A warming trend develops by Wed with dry
near-zonal flow. The only thing may be wind and the above normal
temperatures to contend with for Wed and Thu.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 615 PM MDT Thu Jun 12 2025

Evening radar imagery shows a mix of showers and thunderstorms
tracking northeast across southeast Idaho with wind gusts of
25-40 kts, small hail, and brief moderate/heavy rain associated
with stronger, more organized storms. Activity should gradually
subside later this evening after sunset as quiet and dry
conditions return overnight into Friday morning. Have handled
this with a mix of TEMPO/PROB30 groups and will continue to
monitor trends through this evening for any changes. Looking
ahead towards tomorrow, winds will see an increase for Friday
afternoon with wind gusts peaking around 15-25 kts. Conditions
will remain dry for Friday outside of very isolated shower and
thunderstorm development during the afternoon and evening hours.

&&

.FIRE WEATHER...
Issued at 235 AM MDT Thu Jun 12 2025

Look for scattered showers and thunderstorms this afternoon into the
early evening with moisture moving into the area in southwest flow
aloft. Gusty outflow winds of around 30 to 40 mph are likely with
any thunderstorms. Small hail is also likely with thunderstorms.
High temperatures today will be in the 70s and 80s across the area.
The area begins to dry out again by Friday and into the weekend with
temperatures rising back to the 80s and 90s by the weekend.

&&

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

&&

$$

SHORT TERM...GK
LONG TERM...Messick
AVIATION...MacKay
FIRE WEATHER...TW