Area Forecast Discussion
Issued by NWS Pocatello, ID

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448
FXUS65 KPIH 282053
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
153 PM MST Tue Feb 28 2017

.SHORT TERM...Tonight through Friday. The latest satellite and radar
imagery was showing a weak storm system shearing SE into Wyoming
early this afternoon with ongoing light snowfall trailing across the
region. Winds recently began to ramp up and are still expected to
produce advisory level wind speeds across the Upper and Lower Snake
River Plain through early evening. Numerical models remain fairly
consistent with the idea that a ridge of high pressure will slowly
expand along the NW coast as additional disturbances dig SE into the
NRN Rockies/Upper-Midwest Wednesday through Friday resulting in
periods of light snowfall over the NW facing aspects of the CNTL and
NE mountains. Temperatures will also gradually rise through the
period with a slow resumption of snow melt anticipated within the
ERN Magic Valley and Snake River Plain. Huston

.LONG TERM...Friday night through Tuesday. A cold front will move
through the region Sunday.  Expect mild conditions Saturday ahead of
the front with most precipitation in the mountains.  Expect more
widespread precipitation Sunday with the frontal passage with snow
levels likely reaching valley floors late in the day.   The timing
of this system will likely still vary the next couple of days so no
real snow amount forecasts yet.  European has a much quicker warmup
Tuesday and is much drier than GFS solution which keeps it much
cooler and wetter Tuesday. GK
&&

.AVIATION...Have had snow showers and periods of MVFR and IFR today
at the sites.   Think it should gradually improve after sunset with
the main threat stratus overnight.  Went with some MVFR to IFR
ceilings at IDA and PIH by early morning.  15 to 25 knot sustained
winds expected at BYI, PIH, and IDA through sunset as well. GK
&&

.HYDROLOGY...Cooler temperatures have helped to mitigate snow melt
issues. The next warm up comes late this week peaking on Saturday
with snow melt follow-through expected into Sunday. Huston
&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Wind Advisory continues until 7 PM MST this evening for IDZ020-021.

Winter Weather Advisory until 8 PM MST this evening for IDZ019-023.
&&

$$



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