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fxus66 kotx 220319 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
719 PM PST Tue Feb 21 2017

Synopsis...the last in a series of wet weather systems will
exit the inland northwest tonight. Snowy roads will be common
across the lower Idaho Panhandle. Cooler and showery weather is
forecast through the weekend.

&&

Discussion...
evening update: as the sun set...rain quickly switched to snow for
most locations still receiving precipitation in the Idaho
Panhandle and far reaches of southeastern Washington. Snowy roads are
being observed on area cams for locations above 2500-3000 feet but
this level will lower as the night progresses with slushy
accumulations possible as low as 1500 feet. Spotter in Lenore at
1700 ft was reporting snow back at 545pm. As such, snow advisories
have been expanded into the Camas Prairie and above 2000 feet in
the Lewiston zone. Snow amounts will not be terribly impressive,
roughly 1-3 inches and 3-5 on the Camas Prairie but given the
roads were wet from rain and now snow covered...this setup
typically results in very slick conditions.

Slick roads will be possible for just about every location by the
Wednesday morning commute as the rain and snow melt becomes black
ice with temperatures expected to fall below freezing across the
region.

We have been monitoring sharp rises on Paradise creek in Moscow,
Idaho this afternoon/evening but as of 7pm...rises look to be
slowing and perhaps the cooler air is finally shutting down
runoff. Will be watching this closely the next hour to verify that
it has crested. /Sb

&&

Aviation...
00z tafs: snow this evening at Pullman will have the potential to
produce slushy accumulations up to an inch at Pullman. Low clouds
and fog will likely follow the departure of our band of
precipitation this evening. As our surface low pulls east of the
Continental Divide, our region will undergo a good deal of mid-
level drying and cooling, but fresh precipitation and moist
surface dewpoints will probably keep low stratus and possibly fog
in Spokane, Coeur D'Alene, Sandpoint, and Bonners Ferry at least.
Low level southwest flow favors stratus or fog at these airports.
/Gkoch




&&

Preliminary point temps/pops...
Spokane 26 37 21 35 19 34 / 30 10 10 10 10 20
Coeur D'Alene 28 37 19 35 17 35 / 70 20 20 20 10 20
Pullman 30 38 22 35 20 36 / 70 10 10 30 20 20
Lewiston 34 44 28 41 25 41 / 40 20 10 20 20 20
Colville 24 40 21 37 18 36 / 10 10 20 20 10 20
Sandpoint 28 37 21 35 18 33 / 60 30 20 20 20 20
Kellogg 28 35 22 34 20 33 / 100 30 30 40 20 30
Moses Lake 23 38 21 36 20 35 / 10 0 0 10 10 20
Wenatchee 25 36 22 34 20 33 / 10 10 10 10 10 20
Omak 22 36 21 33 19 32 / 10 10 10 10 10 20

&&

Otx watches/warnings/advisories...
Idaho...Flood Watch through Wednesday afternoon for central Panhandle
mountains-Coeur D'Alene area-Idaho Palouse.

Winter Weather Advisory until 11 am PST Wednesday for central
Panhandle mountains-Lewis and southern Nez Perce counties-
Lewiston area.

Washington...Flood Watch through Wednesday afternoon for Spokane area-
Washington Palouse.

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