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fxus66 kotx 240345 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
745 PM PST Thu Feb 23 2017

Synopsis...
a cool and unsettled pattern will continue over the inland northwest
right into the weekend and into early next week. The main
precipitation threat will be mainly mountain based snow showers,
but a stronger system on Sunday may bring minor snow accumulations
to the valleys and basin. 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.



&&

Discussion...
small update this evening to remove snow showers in the Camas
Prairie, adjust sky cover, and lower temperatures in the blue
mtns. There has been no snow observed on the area cams and models
are in good agreement that the dendritic layer is dried out over
the Camas Prairie. There is still some cloud cover wrapping into
the area from the storm system well to the south however any
precipitation that falls from this deck will be in the form of
flurries. A better chance for a light snow showers will exist
across far southeast Shoshone County not really impacting any populated
areas.

It will be a chilly night with overnight lows in the teens and
twenties. Areas of freezing fog expected to develop but confidence
is not stellar if it will be as widespread as this morning with
hrrr indicating only very shallow activity and far less coverage.
This makes sense as nearly all ASOS sites are 4 to 9 degrees drier
than this time last night. /Sb

&&

Aviation...
00z tafs: fog and stratus development are expected tonight over
the kgeg...ksff and kcoe taf sites as the cold air mass decouples
overnight. Overrunning clouds from a weak system off the coast may
help break the stratus between 16z and 18z into MVFR stratocumulus
ceilings with a small chance of -shsn during the afternoon hours.
It is uncertain and low confidence forecast for a return of
stratus to kpuw overnight tonight with the favorable upslope
westerly winds expected to weaken and shift more southerly
overnight which would favor less of a threat for IFR conditions by
Friday morning. Klws is expected to remain VFR overnight as is
kmwh and keat. During the day Friday upslope low level flow into
the Cascades will allow thickening and lowering ceilings at keat
and may deteriorate to MVFR during the afternoon with -shsn
developing near the taf site. /Mjf




&&

Preliminary point temps/pops...
Spokane 18 34 19 34 24 34 / 0 10 10 10 30 60
Coeur D'Alene 17 34 16 34 22 34 / 0 10 10 10 50 60
Pullman 20 36 20 36 25 36 / 0 10 10 20 30 60
Lewiston 25 40 25 41 27 40 / 0 10 10 20 20 60
Colville 18 35 18 35 24 35 / 0 20 10 10 30 60
Sandpoint 19 33 17 34 23 33 / 0 20 10 20 50 60
Kellogg 19 33 18 33 23 33 / 0 20 10 20 50 70
Moses Lake 18 35 19 35 25 36 / 0 10 10 0 20 30
Wenatchee 20 32 19 34 24 35 / 0 20 10 0 30 40
Omak 19 32 19 32 24 33 / 0 20 10 0 40 50

&&

Otx watches/warnings/advisories...

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