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Area forecast discussion 
National Weather Service Spokane Washington
933 PM PST sun Dec 21 2014

Synopsis...
the active weather from the past few days quiet down Monday.
Expect dry conditions and cooler but still above normal
temperatures tonight through Monday night. Light mountain snow and
valley rain or snow will return late Tuesday. An organized storm
system will impact the region around Christmas eve. This will
bring the potential for moderate to heavy snow in the mountains
and light accumulations to the valleys.

&&

Discussion...
update to grids may have little to no impact on the text wording
as the most significant precipitation issues for rest of the night
concerns how much intense precipitation occurring in the numerous
west to east oriented convergent zones is impacting areas on the
east slopes of the north Cascades and their extent eastward. Since
there is no cold air to overrun the eastward migration of these
convergent zones continues to be limited, yet they need to be
monitored for their potential for localized High Mountain
snowfall rates near the top of the crest and localized moderate
rainfall rates at lower elevations. /Pelatti

&&

Aviation...
06z tafs: convergent zones extending east across the Cascade crest
will impact some locations with moderate snow and rain but fairly
localized and will not extend too far east. Otherwise the Lee side
rain-shadow is taking hold and inhibiting precipitation from
forming for majority of locations further east and on over the
north Idaho Panhandle. As high pressure moves in and pushes the
jet stream east winds, sky cover, and precipitation chances should
all decrease. Some IFR or low MVFR stratus is always possible
given the abundant low level moisture from the recent rainfall
over the past 24 hours but VFR conditions should prevail most of
the time. /Pelatti



&&

Preliminary point temps/pops...
Spokane 32 40 29 41 32 37 / 0 0 0 20 60 80
Coeur D'Alene 32 40 29 40 32 37 / 10 10 0 20 70 80
Pullman 37 43 30 43 33 40 / 20 10 0 10 30 80
Lewiston 39 47 33 46 36 43 / 20 10 0 10 20 80
Colville 28 38 27 37 31 34 / 0 0 10 50 70 40
Sandpoint 30 37 27 36 33 35 / 10 10 10 30 70 70
Kellogg 32 37 27 37 33 35 / 50 50 0 30 70 80
Moses Lake 34 44 30 43 34 40 / 10 10 10 10 20 60
Wenatchee 35 43 33 41 34 39 / 20 10 10 30 20 50
Omak 28 37 27 35 30 34 / 20 0 10 40 40 30

&&

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

$$

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