Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 040541
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
941 PM PST Sat Dec 3 2016

.SYNOPSIS...
Deep low pressure will bring rain, wind, and heavy mountain snow
to the Inland Northwest tonight into Sunday. The heaviest snow
accumulations will occur over the Cascade Crest, Northeast Blue
Mountains and the mountains of the Idaho Panhandle. Much colder
temperatures will arrive Sunday night and remain through Thursday.
Light valley snow across southern WA and the central ID panhandle
will be possible with a weak weather system late Monday.
Additional snow will be possible late next week.

&&

.DISCUSSION...
Regional radars are still lit up with precipitation west of the
Cascades. To the east, not so much. Webcam at Lookout Pass does
show some snow, but not much. So the forecast timing continues to
be trimmed back. No changes to the Advisories currently in place.

00Z NAM continues to look to cold on the model soundings, which
show wet snow for most Panhandle valleys as well as Spokane and
the Palouse. 4km NAM matches the current temperatures much better
and would say that the majority of the valley precipitation will
be in the form of rain with maybe a little non-accumulating wet
snow.

Timing of the cold front on Sunday still looks good. Should be a
short window of rather gusty winds in the afternoon when the front
goes through, but these should stay below advisory level. Models
do show a fair amount of low-level instability during the
afternoon which should help mixed down the gusty winds.  RJ

&&

.AVIATION...
06Z TAFS: Strong westerly flow will bring rain and mountain snow
to the Cascades and Panhandle. The precipitation should back into
the eastern TAF sites later tonight for several hours. Cigs will
be at least MVFR with this, and possibly drop to near IFR. Cold
front will move through midday Sunday for clearing skies and
gusty winds. RJ

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        36  38  19  27  16  22 /  30  30  10  10  40  10
Coeur d`Alene  34  37  18  26  14  21 /  80  60  10  10  20  10
Pullman        36  37  20  29  18  25 /  80 100  20  10  50  20
Lewiston       41  42  25  34  24  29 /  20 100  20  10  50  30
Colville       35  36  17  27  14  23 /  20  20   0  10  20  10
Sandpoint      33  36  17  25  13  19 / 100  60  10  10  10  10
Kellogg        33  35  17  24  11  19 / 100 100  20  10  20  20
Moses Lake     33  45  20  34  22  29 /  10  10   0  30  40  10
Wenatchee      34  42  22  32  22  28 /  10  10   0  50  40  10
Omak           30  39  17  29  17  25 /  10  10   0  20  30  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Storm Warning until 10 PM PST Sunday above 3000 feet for
     Central Panhandle Mountains.

     Winter Weather Advisory from 1 AM to 10 PM PST Sunday above 3000
     feet for Lewis and Southern Nez Perce Counties.

WA...Winter Weather Advisory until 10 PM PST Sunday above 4000 feet
     for Northeast Blue Mountains.

&&

$$



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