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Area forecast discussion 
National Weather Service Spokane Washington
1130 am PDT Tuesday Sep 23 2014

Synopsis...
warmer than normal temperatures are expected again today, but
fall type weather is on the way for the middle to end of the week.
A slow moving cold front will bring an increased chance of rain to
central Washington on Wednesday and Thursday. Cooler temperatures
will also accompany the cold front Thursday and Friday. A slight
warming and drying trend is expected to occur next weekend.



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Discussion...
a moisture laden upper level disturbance will bring increasing
precipitation chances to portions of the inland northwest this
afternoon and evening. The axis of this shortwave disturbance is
entering southwest Washington (as of 11am) and lift associated
with it will enhance the potential for showers and thunderstorms
over NE Washington and far north Idaho this afternoon. Places like
Colville, Sandpoint, Republic and Kellogg receive a few hours of
sunshine this morning aiding the destabilization of the
mountainous zones of NE Washington and north Idaho just in time for the arrival
of this upper disturbance. The NAM and GFS forecast an increase in
instability showers during the afternoon today. Rain amounts with
these showers and thunderstorms will be highly variable due to the
convective nature of the showers. Further west, precipitation will
be more stratiform in nature as a slow moving frontal system moves
on- shore over coastal Washington. Look for waves of rain to
develop over the Cascades this afternoon and persist through the
night and into Wednesday. The Cascades and portions of north
central Washington have the potential to receive a soaking rains
over the next 36 hours.

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Aviation...
18z tafs: an increasingly moist air mass will be moving into
Washington today and tonight. The east slopes of the Cascades will
have the potential for several rounds of rain as a cold front
stalls along the Washington coast. The Wenatchee taf contains
several hours of rain as the predominant weather type tonight into
Wednesday morning. Further east, places like Spokane, Pullman and
Lewiston will have to rely on afternoon destabilization for hit
and miss showers. A brief thunderstorm isn't out of the
question...mainly north and east of Spokane between 20z-01z.
/Gkoch



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Preliminary point temps/pops...
Spokane 75 57 69 52 73 47 / 30 10 30 20 30 30
Coeur D'Alene 76 54 75 50 73 47 / 30 10 20 20 30 30
Pullman 78 54 78 49 73 48 / 10 10 10 10 30 30
Lewiston 82 60 86 56 79 54 / 10 10 10 10 20 30
Colville 77 53 60 50 75 43 / 30 20 60 40 60 50
Sandpoint 74 49 74 47 74 44 / 30 20 30 20 30 40
Kellogg 73 55 80 50 74 45 / 30 10 10 10 20 40
Moses Lake 77 57 68 53 73 46 / 10 20 50 40 50 20
Wenatchee 76 61 66 57 70 50 / 30 30 50 40 60 20
Omak 75 56 67 53 73 44 / 30 30 60 40 60 40

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

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