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Area forecast discussion 
National Weather Service Spokane Washington
1024 am PDT Sat Sep 5 2015

Synopsis...

A low pressure system will bring widespread rain and much cooler
temperatures to the Idaho Panhandle and portions of eastern
Washington Saturday. Light showers may linger mainly across the
mountains Sunday and Monday. A drying and warming trend is
expected next week.

&&

Discussion...
update: forecast updates have been issued based on latest
satellite and radar trends. A closed low over the Palouse as of 10
am will slide northeast into the central Panhandle mountains and
northwest Montana this afternoon. A band of stratiform rain on the north
and west side of the low thus far has resulted in the most
significant rain in western Spokane, East Lincoln and Adams
counties, as well as southern Stevens County. These areas will
continue to receive stratiform rain into the early afternoon before
the focus begins to shift north and east across the remainder of
eastern Washington and north Idaho as the low moves northeast.
Over central Washington a tight cross Cascade gradient exists with
Seattle-Wenatchee pressure gradient at 7mb. Cloud cover banked up
against the Cascade crest and mostly clear skies in the Lee of the
Cascades will aid in tightening the thermal/pressure packing this
afternoon leading to breezy to locally windy conditions through
the Cascade gaps and on ridge tops. The winds for Wenatchee, Lake
Chelan, Methow Valley, and on the ridge tops have been increased with
gusts of 25-35 mph expected...peaking in the late afternoon and
early evening. The strong downslope flow off the Cascades should
help keep the majority of central Washington dry through the day. Jw

&&

Aviation...
18z tafs: bands of rain rotating around a very slow moving low
pressure area centered over eastern Washington keeps rain in the
forecat for through much of the day today. The low will eventually
make an exit to the northeast and be far enough away between 0z
and 6z Sunday to decrease some of the shower and cloud cover...and
by 9z Sunday even further enough to dry many of the tafs out but
start to mention some fog and stratus for tonight and early Sunday
morning hours. /Pelatti

&&

Preliminary point temps/pops...
Spokane 54 44 64 44 67 48 / 100 50 10 10 20 10
Coeur D'Alene 53 43 63 43 65 45 / 90 70 20 10 30 10
Pullman 53 41 62 41 66 45 / 80 60 20 10 10 10
Lewiston 60 48 69 47 74 51 / 70 60 10 10 10 10
Colville 59 44 67 43 70 46 / 90 50 20 20 20 20
Sandpoint 55 43 62 40 65 43 / 90 70 20 20 40 10
Kellogg 53 42 61 41 63 41 / 90 80 30 20 40 10
Moses Lake 72 48 73 47 75 50 / 50 20 20 0 0 10
Wenatchee 73 53 73 52 76 53 / 10 10 20 10 0 10
Omak 73 47 74 46 76 50 / 20 20 20 10 20 20

&&

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

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