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fxus66 kotx 261732 
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Area forecast discussion
National Weather Service Spokane Washington
1032 am PDT sun Mar 26 2017

Synopsis...
widespread rain and mountain snow will move into the region this
afternoon and linger into Monday morning. Showery weather is
expected through Tuesday then another widespread moderate
precipitation event will arrive on Wednesday and Thursday.



&&

Discussion...
morning update: made some adjustments to the temperatures and snow
levels with onset of the precipitation in the Cascades today.
Most locations are currently in the 30s resulting in snow levels
ranging from 1200-1600 ft between the Methow Valley and Stehekin
to 2000-2600 feet between plain and the Waterville Plateau. With
clouds thickening and precipitation expect to commence in the next
1-3 hours...temperatures will have a tough time warming from the
current values given the wetbulb cooling processes that will
occur. As such, snow levels will be slower to rise and we should
see snow or mix of snow/rain in many of the Cascade valleys.
Given the time of day, I don't foresee snow sticking on area
roads except possibly slushy accum on the mountain passes. A Washington
dot Road temperature sensor from Stevens Pass has already warmed
to 33f suggesting snow will likely melt as it falls unless the
intensity exceeds what the model consensus is indicating...which
is light. Utilizing the incoming lamp guidance and current obs,
high temperatures were cooled for most locations in central Washington
including Wenatchee, plain, Winthrop, and Omak. /Sb



&&

Aviation...
18z tafs: a warm front lifting into the region will spread
precipitation into central Washington 18-20z and eastern taf
sites 20-22z. Wet snow may mix with rain at times at Wenatchee and
may fall as wet snow for Cascade valleys including plain and
Winthrop with no accumulations expected. Wdsprd mtn obscrns
likely. Precip will generally remain light leading to
fluctuations between MVFR/low VFR restrictions and have delayed
MVFR restrictions for eastern terminals until second band of
precip aft 00z. Steady precip to transition to a line of showers
after 00-07z as cold front slowly trickles through west to east.
Patchy fog and areas of stratus possible for a few hours behind
the front with any restrictions improving aft 17z Monday. /Sb



&&

Preliminary point temps/pops...
Spokane 47 38 50 35 48 39 / 70 80 40 10 20 40
Coeur D'Alene 45 37 48 35 46 37 / 50 80 70 30 30 30
Pullman 51 38 50 35 49 39 / 70 70 60 20 10 30
Lewiston 53 40 55 37 54 42 / 20 80 50 20 10 10
Colville 42 36 50 34 47 36 / 40 90 40 10 50 60
Sandpoint 43 33 45 32 44 34 / 10 80 50 20 50 50
Kellogg 45 34 45 34 44 35 / 20 90 90 40 40 40
Moses Lake 46 38 58 38 56 42 / 70 60 10 10 10 60
Wenatchee 43 35 55 36 52 38 / 90 60 20 10 20 60
Omak 44 36 54 35 50 38 / 90 90 20 0 20 60

&&

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

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