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fxus66 kotx 250537 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
937 PM PST Fri Feb 24 2017

Synopsis...
snow showers will linger in the Idaho Panhandle on Saturday. A
wetter system arrives Saturday night and lingers into Monday
bringing light to moderate snows. Temperatures will be cooler
than normal for this time of year with overnight lows in the teens
and 20s and daytime highs only in the 30s. A gradual warm up is
forecast by the middle of next week followed by breezy winds and
mountain snow.



&&

Discussion...
evening update: snow showers which lead to flash icy in the
Spokane area during the evening commute have finally waned.
However areas of dense fog are now becoming a problem up on the
West Plains. By the looks of satellite, visibility restrictions
are possible along Highway 2 stretching toward Wilbur. We are
monitoring another wave dropping in from the north and expected to
swing through north Idaho tonight into early Saturday. With the
loss of daytime heating, models are not very excited about snow
shower activity with this however given the instability noted on
the 00z balloon data, opted to increase pops to slight chance for
much of NE Washington and north Idaho as the lift interacts with the resident
instability. The afternoon balloon data may be contaminated some
due to a snow shower over The Launch site this afternoon at the
time of release.

A multi-day snow event will be setting up Saturday night and
continuing into Monday with the potential for 8 or more inches in
spots. Most favored locations include the central Idaho Panhandle
mtn zone but will need to see how 00z guidance trends into the
Palouse and Spokane-cd'a areas. /Sb



&&

Aviation...
06z tafs: clear skies and a moist boundary layer from earlier snow
showers has resulted in areas of dense fog on the West Plains
around kgeg however with clearing noted over ksff and
kcoe...anticipate fog to continue to expand. Boundary layer winds
are in the process of reversing. When they become more southerly,
there is a chance that stratus expands from kgeg-kcoe with
improvement possible in fog. Per spotters and river readings,
1/4-1/2 vis at Spokane is bouncing around and could improve at
times near 3/4-1sm. Shallow patchy fog will be possible arnd
Pullman, Lewiston, and Moses Lake but the threat is too low for
restrictions in the tafs which would be brief if any at all. A
winter storm moves in from the north after 06z with snow expected
for all tafs lingering across southeast Washington and NC Idaho into Monday. /Sb

&&

Preliminary point temps/pops...
Spokane 18 33 24 33 21 33 / 10 10 60 90 70 40
Coeur D'Alene 16 33 23 34 21 34 / 20 10 60 80 80 50
Pullman 21 35 26 35 24 35 / 10 10 60 90 80 60
Lewiston 26 40 29 40 28 40 / 10 0 30 80 70 60
Colville 15 34 23 35 20 34 / 10 0 60 70 30 30
Sandpoint 17 33 23 34 22 33 / 20 10 60 80 70 40
Kellogg 19 32 24 33 24 32 / 20 20 60 90 80 60
Moses Lake 16 36 25 36 23 38 / 0 0 30 80 40 20
Wenatchee 17 34 24 34 22 35 / 10 0 40 60 30 20
Omak 16 33 23 35 21 35 / 10 0 60 60 20 10

&&

Otx watches/warnings/advisories...
Idaho...none.

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