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fxus66 kotx 220609 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
1009 PM PST Wed Feb 21 2018

Synopsis...
cold and generally dry conditions will persist through Friday
morning except for some passing light snow showers or flurries at
times. A pair of stronger storm systems will impact the region by
this weekend into early next week with the potential for snow and
breezy conditions for most locations.



&&

Discussion...
evening update: an upper trough continues to dig along the Pacific
northwest coast, with an embedded shortwave and semblance of
deformation axis across eastern Washington. The embedded shortwave is
using the limited moisture and cold air to produce some flurries
and a few steadier snow showers. They are too shallow to pick up
near the Cascades, further away from the radar, but reports and
surface observations told of them falling. There has also been a
somewhat persistent but very narrow area of snow on radar near the
Spokane/Lincoln County border, produce some light accumulations
along parts of Highway 2 near Davenport to the West Plains of Spokane
area. Observations and web-cameras show this. Accumulations are
trace amounts to less than an inch and this impact should be
limited, but it is something to be cautious of when traveling
tonight.

The features producing this snow showers and flurries are
expected to gradually sag southward tonight into Thursday morning.
The threat of isolated snow showers and flurries will linger
through the night but should shift to mainly far southeastern
Washington/lower Idaho going into Thursday morning with increasing north-northeast
winds drying things out. Some of those winds are already picking
up near Omak.

Minor adjustments made to pops, sky cover and winds,
as well as overnight lows. Once again overnight lows will be
tricky, as any clearing could allow temperatures to fall. However
the increasing northerly winds should help to keep things mixed
and the extensive cloud cover suggest for the large part the area
will be warmer than tonight than last night. /J. Cote'

&&

Aviation...
06z tafs: an upper trough sags through, with clouds and flurries
and the occasional snow shower. The risk for snow showers will
lay over geg/sff/puw/lws with smaller chances near Coe. The snow
will be light and perhaps may just be flurries. However they will
come with a threat of MVFR conditions. Conditions will improve
into Thursday morning and afternoon, with increasing north-
northeast winds. /J. Cote'



&&

Preliminary point temps/pops...
Spokane 14 26 11 29 23 36 / 20 0 0 20 70 40
Coeur D'Alene 9 26 5 29 21 35 / 20 0 0 30 80 60
Pullman 17 25 11 29 23 35 / 20 10 10 20 80 70
Lewiston 22 29 19 36 29 42 / 30 20 10 10 30 70
Colville 14 29 8 29 19 36 / 10 0 0 30 30 30
Sandpoint 11 28 11 27 21 34 / 10 0 0 40 80 60
Kellogg 11 25 12 26 20 31 / 20 0 10 20 90 80
Moses Lake 19 32 15 37 25 44 / 10 10 0 10 10 20
Wenatchee 16 30 18 36 25 43 / 20 10 0 10 10 20
Omak 15 26 7 31 20 38 / 10 10 0 20 10 20

&&

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

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