Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 242158

Area Forecast Discussion
National Weather Service Boise ID
258 PM MST Fri Feb 24 2017

.SHORT TERM...Tonight through Saturday Night...A quiet period
expected. The low pressure system which resulted in significant
snowfall across the Magic Valley and areas south has moved further
northeast...taking its impacts with it. A few showers cannot be
completely ruled out over through Saturday night as an area of low
pressure moves southwest near the Pacific coastline. This system is
expected to have minimal impact over the forecast area. The next
influencing system will send an Alaskan low pressure system down the
Pacific coast, with moisture just beginning to reach into the
northern extremes of the forecast area late Saturday night.

.LONG TERM...Sunday night through Friday...A trough will drop out of the
Gulf of Alaska Sunday into the beginning of next week bringing snow
across the region once more. Models have trended upwards in their
QPF amounts for this system and have taken this factor into account
in the updated forecast. Most of the new snowfall will focus over
the mountain areas, with most valley locations receiving little
accumulation. The West Central Mountains are looking to receive the
brunt of the impact. Southwesterly upper level flow out ahead of the
trough on Sunday as the trough digs in, will quickly turn westerly
and northwesterly by the beginning of the week, keeping the region 5
to 10 degrees below normal through the period. While the trough is
expected to move out of the region by Tuesday morning, the West
Central Mountains will stay under a wet northwesterly flow for daily
chances of snow showers through the end of the period.


.AVIATION...MVFR snow showers and mountain obscuration to continue
over portions of the central Idaho mountains, generally north and
east of a KMYL-KBOI-KTWF line. Elsewhere, VFR conditions expected.
Surface winds: W-NW generally 12 kts or less, except for Mountain
Home and to its south and east where winds of 10-20 kts are
expected. Winds aloft at 10kft MSL: W 10-20 kts.

Weekend outlook...Mainly VFR on Saturday. Deteriorating conditions
Sunday as another weather system spreads snow across the area.





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