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Forecast Discussion for Spokane, WA

000
FXUS66 KOTX 240600
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1000 PM PST Tue Jan 23 2018

.SYNOPSIS...
Wet and active weather is expected through the week. A mild
weather system will bring significant precipitation overnight
into Wednesday and again next weekend with a mix of rain and snow
across the lower elevations and snow in the mountains. Difficult
travel conditions are expected in the mountains at times.

&&

.DISCUSSION...
Made a few updates to the forecast this evening. A complex winter
weather this evening as a warm front slowly progresses through the
region. Surface temperatures are running steady to slowly rising
through the night. The 00z OTX sounding had Pwats of 0.49" with a
shallow warm nose of up to +1C in the lowest 1500 ft. Strong warm
air advection this evening kept much of the precipitation type as
snow even as temperatures warmed above freezing, leaving a wet
sloppy snow from the Wenatchee Valley and along the Highway 2 and
97 corridor. The evening precipitation amounts were not as high as
previous forecast for northeast Washington and north Idaho, and
have adjust snow amounts as well. Precipitation looks to decrease
gradually in the lee of the Cascades as low level winds veer to
the southwest overnight. Likewise, good downsloping has limited
the precipitation across the LC Valley and Camas Prairie.
Elsewhere will continue to see rain and snow persist for much of
the night. /rfox.

&&

.AVIATION...
06z TAFS...Precipitation remain widespread this evening and models
trend this to continue overnight and into Wednesday morning.
KLWS is staying on the dry side with downsloping off the Camas
Prairie and VFR conditions. Southeast winds show periodic gusts
around KPUW with -RA and local MVFR cigs. Easterly flow looks to
continue through much of Wednesday, which will keep conditions
predominantly IFR from KMWH to KEAT with -RA. The KGEG-KCOE
corridor is tricky with -SN at the higher elevations switching to
-RA toward morning. Areas of IFR conditions will prevail, with
 some improvement to MVFR by Wednesday afternoon. Winds gradually
 veer to the south to southwest after 00z Thursday with a slow
 improving trend, although confidence on the timing is low.
 /rfox.

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        34  40  30  36  29  36 / 100 100  80  40  50  60
Coeur d`Alene  32  38  30  36  28  34 / 100 100  90  30  60  80
Pullman        35  42  31  39  29  37 / 100 100 100  30  50  60
Lewiston       39  48  34  43  32  42 /  80  70  70  30  30  40
Colville       32  38  30  36  28  35 / 100  90  90  30  60  60
Sandpoint      33  36  31  35  28  33 / 100 100 100  40  70  70
Kellogg        33  38  29  34  27  32 / 100  90 100  30  70  90
Moses Lake     36  47  29  41  29  42 /  80  70  10  30  20  10
Wenatchee      30  39  25  35  26  36 /  70  50  10  40  20  10
Omak           31  36  25  33  25  34 / 100 100  80  40  20  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory until 9 AM PST Wednesday above 2000 feet
     for Coeur d`Alene Area.

     Winter Storm Warning until 4 AM PST Thursday for Northern
     Panhandle.

     Winter Storm Warning until 4 PM PST Wednesday above 3500 feet
     for Central Panhandle Mountains.

WA...Winter Storm Warning until 4 AM PST Thursday for East Slopes
     Northern Cascades.

     Winter Weather Advisory until 4 AM PST Wednesday above 1500 feet
     for Waterville Plateau-Wenatchee Area.

     Winter Weather Advisory until 9 AM PST Wednesday above 2000 feet
     for Spokane Area.

     Winter Storm Warning until 4 AM PST Thursday for Northeast
     Mountains-Okanogan Highlands.

     Winter Weather Advisory until 4 AM PST Wednesday for Okanogan
     Valley.


&&

$$

NWS Spokane, WA (OTX) Office Area Forecast Discussion

Discussion Script by Ken True at Saratoga Weather - WFO Script by SE Lincoln Weather