Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 181851
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1051 AM PST Thu Jan 18 2018

.SYNOPSIS...
A moist frontal system will slowly sag through Idaho and
Southeastern Washington today. Cooler air behind the front will
allow snow to return on area mountain passes. An active weather
pattern will continue into next week with light to moderate snow
possible Sunday and again Tuesday into Wednesday.

&&

.DISCUSSION...
A cold front moving across the region will get hung up across
southeast WA and into the southern to ID Panhandle through the
afternoon. This will result in rain for the L-C Valley, the
Palouse, Silver Valley, St. Joe River Valley and on the Camas
Prairie. Snow levels will remain at or above 4000 feet through
this afternoon underneath the precip. There have been some reports
with recent rain events of debris flows in steep terrain. I expect
we will see the potential for an additional quarter to a half an
inch of rain. This will increase the potential for more debris
type flows or rock slides. Rain is expected to taper off a bit in
the evening, but there is another shortwave disturbance that will
move up across the area overnight. This wave was not represented
well in the previous forecast. I increased precip chances quite a
bit with best chances expected over southeast WA and into the
southern to central ID Panhandle. Although, we will see at least
some light precip as far as the Northeast Mtns and the Northern
Panhandle as well. Snow levels will drop further overnight to
between 2000-3000 feet with rain transitioning over to snow at
lower elevations. Any valley snow accumulations will likely be
light and only up to around an inch possible. Snow may have a hard
time actually accumulating on the roads since they are currently
running up around the upper 30s to lower 40s. /SVH

&&

.AVIATION...
18Z TAFS: Rainfall will become hung up along a cold front across
southeast WA and into the southern to central ID Panhandle this
afternoon. KPUW and KLWS will see a steady does on rain with MVFR
conditions. The front will begin to slide southeast of these areas
in the evening with a brief period of improving conditions
expected. However, there will be another upper level disturbance
that pushes across overnight. Temperatures will be cooler with a
chance for some snow at KGEG, KSFF, KCOE, and KPUW. KLWS will
likely remain as rain with precip remaining east of KEAT and KMWH.
/SVH

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        42  30  36  29  36  28 /  10  60  30  20  30  20
Coeur d`Alene  41  31  35  29  36  28 /  50  70  40  30  60  20
Pullman        43  32  39  30  38  30 /  80  80  20  20  60  10
Lewiston       46  35  43  33  42  31 /  80  80  20  20  30  10
Colville       42  31  36  28  36  28 /  10  30  20  40  30  20
Sandpoint      38  31  35  29  34  29 /  60  70  70  40  60  30
Kellogg        38  30  34  28  34  27 /  80  90  60  40  60  40
Moses Lake     47  31  40  29  41  29 /   0  10  10  20  10  10
Wenatchee      41  29  37  29  38  28 /  10  10  10  20  10  10
Omak           39  29  34  27  35  27 /  10  10  10  40  20  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.

&&

$$



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