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411
FXUS65 KPIH 210849
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
249 AM MDT Sat Sep 21 2024

.DISCUSSION...
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The area will reside in a rather benign upper level pattern
through the weekend with a low moving towards the Four Corners
today and and upper level trough will to the north across central
Canada. With the lack of much flow aloft, not expecting much
change to the weather across the region through the weekend. This
will mean continued mostly clear skies, light winds, pleasant
temperatures and no precipitation. Daytime highs across the high
country will top out in the 60s with readings around 70 expected
in the lower valleys. Overnight lows through the weekend will be
in the upper 30s to mid 40s in the valleys, cooler naturally in
the mountains. Could see some patchy frost across the agricultural
zones in the coldest locations but not expecting anything
widespread.

As we move into the workweek, the weather pattern looks to remain
mostly quiet. A trough sweeping north of the region could spark a
few showers around Island Park but PoPs are trending lowering
during this time period so things will be very low impact if
anything were to transpire. At worst, we`ll likely just see some
slightly increased cloud cover across eastern Idaho. As this
trough moves east, a transient ridge will quickly shift over the
region Tuesday and Wednesday and this will keep things quiet
although temperatures will be their warmest during this period.
Could see some low 80s return into some of our valley locations
but still thinking that mid to upper 70s will be more common.
Nevertheless, it`ll be a touch warmer than what we`ve seen for
much of the last week.

Confidence in the upper level pattern begins to breakdown a bit
after Thursday and into next weekend. It does appear that more of
a southwesterly flow aloft will set in as an upper trough moves
towards the Pacific NW later in the week. Models still have
varying opinions as to when and where certain features may pass
through the area especially as we get into next weekend. Either
way, it looks like the quiet weather should last through the work
week with things remaining within a few degrees of seasonal norms.
McKaughan
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&&

.AVIATION...
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VFR conditions expected through the period with light winds and
mostly clear skies. Only CIGs expected today will be some
occasional high clouds streaking across the region but will not
be overly impactful. McKaughan
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&&

.FIRE WEATHER...
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Low pressure exiting the southern Great Basin will
allow a high over the rest of the western states to build and
strengthen, but only for a short time. Warming continues into Sun,
with light wind and lower humidity.

A trough moves into northern Great Basin Sun night/Mon and reverses
those trends, although there is not enough moisture for anything
more than increase cloudiness and surface humidity. Messick
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&&

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

$$