Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 142043

Area Forecast Discussion
National Weather Service Pocatello ID
143 PM MST Wed Feb 14 2018

.SHORT TERM...A cold front is moving through the region this
afternoon. Looking at good chances for snow across the high
country mainly this evening. Much less chances for the Snake Plain
and Magic Valley because of downslope effects. Still looking for
1 to 3 inches of snow across the high country with little to none
across the Magic Valley and Snake Plain tonight. Late tonight and
Thursday morning, looks like a slow moving band of snow will
develop across the upper Snake Plain and move southward. This band
may arrive in the Pocatello area around midday or early
afternoon. Looks like from Rexburg through Idaho Falls, Blackfoot
to Pocatello could see up to an inch with this band of snow.
Elsewhere we`ll just see residual snow showers with minor
accumulations possible. We`ll see a brief break Thursday night
before the next system arrives from the northwest on Friday and
persists into Friday night. Once again this system looks like
another windy system with high country snows. Potentially looking
at another 1 to 3 inches across the high country with little to no
snow for the Magic Valley and Snake Plain because of downslope
effects. Winds might be strong enough for wind advisory Friday
afternoon. However models have initially been showing strong winds
with these systems and then backed off within 48 hours of the
event, so we`ll see.


.LONG TERM...Saturday through Wednesday. Fairly substantial amounts
of snow are in the forecast for the weekend it is just a matter of
determining the details at this time. A more winter-like pattern is
setting up for the weekend as an upper trough encompasses our
state Saturday and leading shortwaves provide snow showers
starting early in the day for the Mountains and later in the
evening for the rest of SE Idaho. Snow showers will continue for
all of SE Idaho during the overnight hours, providing decent
amounts of snow accumulation. This will mean your Sunday morning
commute will be a snowy/slushy one and your driveways may actually
need to be shoveled! One area we are least confident in this
needing to be accomplished are from Pocatello south and westward
through the Magic Valley - it may (and perhaps is likely) be too
warm for significant snow accumulations still. A separate trough
will dig south into Washington, Oregon and Idaho Sunday into
Monday and will continue the snow activity. There is likely to be
brief break in activity for part of the day Sunday before the more
substantial impacts of the trough reach SE Idaho through Monday.
These fine tune details are still unknown but you can expect
cooler temperatures for next week, especially Tuesday and
Wednesday. NP/Valle


.AVIATION...Slightly breezy this afternoon with winds mainly
expected to stay breezy through the overnight hours. A slight
decrease in winds are probable during the late evening hours
before increasing again. Skies/vis starting off as VFR across the
board though there are echos on the radar this afternoon already.
DIJ may coming down sooner than expected with an MVFR ceiling
shortly and it is forecast before 00z anyway before the onset of
snow showers. Precipitation spreads across the region for the rest
of the sites this evening, thus expect lowering ceilings and
visibility through tomorrow morning. NP/Valle



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