Area Forecast Discussion
Issued by NWS Spokane, WA

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000
FXUS66 KOTX 010619
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1019 PM PST SAT JAN 31 2015

.SYNOPSIS...
A frontal system will bring light snow to much of the region on
Sunday. Another front is expected on Monday, and it should bring
rain and mountain snow. More warm and wet weather disturbances are
expected next Thursday through Saturday to end the nest work
week.


&&

.DISCUSSION...
No updates were made to the forecast for tonight. The next pacific
storm system is still on track to push across the region on
Sunday. Radar is already picking up some weak echoes over the
Cascade Mtns, over the Okanogan highlands/valley and into the
western basin. I have not found any ground truth to suggest that
this moisture is reaching the surface. Our afternoon sounding
shows a good amount of dry air that needs to be overcome between
850 and 500 mbs. The main tweak I made to the forecast was to
delay the onset of precip across the eastern half of the forecast
area a little bit. It still looks like that snow will hold off
over the Panhandle for the most part until at least the late
morning hours and then pick up in the afternoon. I only made some
small adjustments to the snow amounts based off of the 00Z runs of
the NAM and GFS. No changes will be made to the Winter Weather
Advisories that will go in effect on Sunday. /SVH


&&

.AVIATION...
06Z TAFS: A Pacific storm system is beginning to push into the
region this evening. Satellite imagery shows a mid to upper level
cloud shield moving into the region. These high clouds is making
it difficult to track the current stratus layer over the region.
The trend is for these low clouds to break up from east to west
across the Panhandle into the basin as drier easterly winds pick
up tonight. The atmosphere will then begin to moisten from the top
down late tonight into Sunday morning with light snow expected at
KEAT, KGEG, KSFF, KCOE and KPUW. Expect cigs and vis to degrade
through the morning on Sunday and continue into Sunday afternoon
with IFR conditions possible. /SVH


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        30  32  31  38  32  39 /  10 100  50  70  50  20
Coeur d`Alene  30  32  31  39  34  40 /  10 100  70  80  60  30
Pullman        30  36  34  44  37  45 /  10  90  70  70  60  30
Lewiston       33  41  37  49  39  49 /  10  60  50  50  50  20
Colville       31  34  31  35  31  36 /  10 100  40  60  40  20
Sandpoint      32  33  30  36  32  37 /  10  90  70  70  60  30
Kellogg        30  34  32  39  34  39 /  10 100 100  90  90  60
Moses Lake     34  38  31  41  33  44 /  10  30  10  50  10  10
Wenatchee      33  38  33  40  33  42 /  30  50  10  60  20  20
Omak           32  34  30  37  31  36 /  50  70  10  60  20  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory from 10 AM Sunday to Midnight PST Sunday
     Night for Central Panhandle Mountains-Coeur d`Alene Area-
     Northern Panhandle.

WA...Winter Weather Advisory from 7 AM to 7 PM PST Sunday for
     Northeast Mountains-Okanogan Highlands-Spokane Area.

&&

$$



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