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Area forecast discussion 
National Weather Service Spokane Washington
1026 am PST Wednesday Nov 26 2014

Synopsis...
mild and breezy weather is expected today and Thanksgiving. By
late this morning, snow levels should rise above the mountain
passes. Motorists with plans to travel over the mountain passes
should experience good conditions this afternoon through Friday
afternoon. The arrival of a cold front Friday night into Saturday
will bring winter driving conditions to the mountain passes and
much cooler weather for the weekend.



&&

Discussion...
morning update: we continue to delay rising snow levels along the
Canadian border however despite on and off snow at locations like
Laurier, Bonners Ferry, and Metaline Falls accumulations look to
be primarily on grassy (non-road) surfaces. Therefore, the winter
weather advisories were allowed to expire at 10am this morning.

Travel across the region looks to be most problematic along Hwy
20 over Sherman Pass and into the Okanogan and Methow valleys
where 12-18 inches of snow fell over the last 36 hours. The main
roads look mainly wet via cams but many secondary roads will
likely still be dealing with slick, slushy conditions. Periods of
light snow will remain a possibility through today with most
accumulations remaining on non-Road surfaces.

Areas of dense fog will be a larger concern region-wide and will
restrict visibilities at times. The worse conditions look to be
along Hwy 2 between Airway Heights and Wenatchee and at times in
and around Moses Lake. Nearly all valley locations north of Hwy 2
can also expect fog and low clouds as warmer air moves in aloft
and strengthens inversions.

Quite the contrast in temperatures expected today with 60s in the
foothills of the blue mtns and Snake River Valley while
communities near the Canadian border remain socked in the 30s.



&&

Aviation...
18z tafs: recent rain/snow and warming aloft will promote areas
of fog and low clouds across most terminals this morning with
improving conditions expected through this evening. Areas of
LIFR/IFR fog currently stretches across the upper Columbia Basin
from kcoe to kmwh. Confidence is low regarding exact timing for
improvements but gusty S/SW winds in the Lower Basin should
promote improving conditions kpuw-klws by 20z then expanding north
through 06z. Kmwh/keat will carry the lower probabilities for
clearing. The upper-level ridge will flatten tomorrow suppressing
the moist frontal boundary back south lowering cigs btwn 4-6k ft
agl and incr the threat for light rain. /Sb




&&

Preliminary point temps/pops...
Spokane 46 42 50 40 45 26 / 20 30 30 20 80 60
Coeur D'Alene 45 41 48 40 44 27 / 40 30 30 20 90 70
Pullman 53 44 53 42 48 31 / 10 30 30 20 80 80
Lewiston 57 47 58 45 52 37 / 10 10 10 20 70 80
Colville 39 38 46 38 42 20 / 50 60 50 40 80 10
Sandpoint 39 38 45 37 41 25 / 70 70 60 50 90 50
Kellogg 42 40 44 38 40 29 / 60 60 70 70 90 80
Moses Lake 48 44 55 40 50 25 / 0 10 10 10 30 20
Wenatchee 46 42 50 41 47 27 / 10 10 10 20 30 10
Omak 39 38 46 35 40 14 / 20 30 30 30 50 10

&&

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

$$

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