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fxus66 kotx 250047 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
547 PM PDT Mon Apr 24 2017

Synopsis...
expect cool, breezy, and showery weather this week. The most
widespread precipitation will likely occur Tuesday night into
Wednesday with the potential for a half inch or more of rain over
portions of the Idaho Panhandle and southeast Washington. Mountain
passes could see a few inches of snow late Wednesday. A ridge of
high pressure next weekend has the potential to bring the region a
day or two of drier weather.

&&

Discussion...
early evening update: radar imagery as of 530 PM showed a gradual
decrease in showers across NE Washington/north Idaho with dry conditions
across much of the Columbia Basin. With the loss of daytime
heating and lack of forcing overnight the latest runs of the
GFS/NAM/hrrr/ECMWF show showers quickly coming to an end around
sunset. The forecast has been updated to lower pop's after 8 PM
for NE Washington and north Idaho with only isolated showers
expected after sunset...with dry conditions favored overnight.
Further south a closed low over the South Washington Cascades will
be tracking into eastern Oregon this evening and then into
northern Nevada by Tuesday morning. As it does so a band of
showers will rotate east-northeast into the Blue Mountains,
Lewiston area, and Camas Prairie this evening possibly clipping
the Palouse. These showers should diminish overnight but residual
moisture and upslope flow will likely keep some shower activity
persisting overnight. Jw

&&

Aviation...

00z tafs: scattered showers will be decreasing through 03z with
the loss of daytime heating with VFR conditions expected at all
taf sites. For this evening a cluster of moderate to heavy showers
will track across NE Oregon clipping far southeast Washington and klws.
These showers will further moisten the boundary layer and models
show a good chance for stratus to expand overnight into Tuesday
morning for the Palouse...Idaho Panhandle...and far eastern Washington.
Forecast soundings show the lowest ceilings for kpuw with IFR
conditions...with ceilings restrictions a bit more uncertain at
kgeg/ksff/kcoe where MVFR is forecast for now although IFR can not
be ruled out. Stratus will lift mid to late morning with VFR
conditions expected for all taf sites Tuesday afternoon. Jw



&&

Preliminary point temps/pops...
Spokane 39 56 43 52 36 50 / 20 50 90 80 60 40
Coeur D'Alene 38 54 40 50 34 49 / 50 60 90 90 70 60
Pullman 40 55 43 50 36 49 / 50 40 100 80 70 50
Lewiston 43 61 47 55 40 54 / 70 30 90 70 50 30
Colville 37 57 41 53 37 50 / 40 60 60 70 50 40
Sandpoint 36 52 38 50 36 47 / 30 70 70 90 80 60
Kellogg 36 50 38 47 34 43 / 50 70 90 100 80 70
Moses Lake 39 63 46 59 40 58 / 10 10 30 40 10 10
Wenatchee 41 60 44 56 38 54 / 20 10 20 30 10 10
Omak 37 63 44 56 37 55 / 10 30 40 50 20 20

&&

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

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