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fxus66 kotx 210525 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
1025 PM PDT Fri Apr 20 2018

Synopsis...
a quick moving cold front will bring scattered showers tonight and
early Saturday and windy conditions Saturday afternoon. The new
work week is expected to start dry and mild and probably remain
dry with a strong warming trend through the week.



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Discussion...
evening update: a mid level front will sweep across the region
tonight bringing mainly passing mid level clouds with a chance of
showers limited to mainly the northern mountains with showers
likely along the Cascade crest late tonight as moist upslope flow
reaches the area behind the surface cold front. The 00z NAM has
trended drier over northern Washington with the higher resolution models
also drier except near the Cascade crest. Given current
temperature/dew point spreads of 20-25f for many locations and the
fast movement of the front the threat of showers will be limited
to mainly the mountains. Pop's were adjusted for the rest of
tonight...trended downward for many locations.

Snow levels lower to near 3500 feet Saturday morning in the
Cascades so brief accumulations are possible over Stevens Pass.
Jw



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Aviation...
06z tafs: a quick hitting cold front will swing through tonight.
Cloud cover will thicken tonight with showers mainly over the
mountains of northern Washington into the Idaho Panhandle. Dry
air in the boundary layer will keep cigs above 5 kft above ground level with VFR
conditions prevailing through 00z Sunday. Winds will become gusty
Saturday morning to between 25-35 kts possible and will continue
into the afternoon. Jw

&&

Preliminary point temps/pops...
Spokane 43 54 34 56 36 63 / 20 10 0 0 0 0
Coeur D'Alene 43 54 33 56 35 62 / 30 30 0 0 0 0
Pullman 44 53 33 54 35 61 / 20 10 0 0 0 0
Lewiston 48 61 38 60 40 66 / 20 10 0 0 0 0
Colville 44 58 34 60 34 66 / 50 30 0 0 0 0
Sandpoint 41 52 32 55 34 60 / 30 60 0 0 0 0
Kellogg 38 50 32 55 34 58 / 30 50 10 0 0 0
Moses Lake 46 60 36 62 38 69 / 10 0 0 0 0 0
Wenatchee 44 56 37 60 39 67 / 10 10 0 0 0 0
Omak 45 59 37 62 37 68 / 30 10 0 0 0 0

&&

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

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