Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

fxus66 kotx 210549 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
949 PM PST Sat Jan 20 2018

Synopsis...
an active weather pattern is expected through the week. Snow and
rain will develop late tonight into Sunday. More weather systems
will bring significant precipitation Tuesday night into Wednesday
and again next weekend with a mix of rain and snow across the
lower elevations and snow in the mountains. Travel impacts are
expected at times, especially over the mountain passes.

&&

Discussion...
made evening updates regarding temperatures, especially in the
Omak area where raditional cooling allowed the temperature to drop
below its minimum and freezing. As clouds increase, could see near
steady temperatues and but a good chance that the onset of the
precipitation will be as snow. Evening showers are quickly
decreasing acros north Idaho, meanwhile a deck of low clouds
lingers across northeast Washington and north Idaho. Patchy fog
will also be an issue across northeast Washington, and as
temperatures drop below freezing, slick spots on roadways may be
an additional issue. /Rfox.

&&

Aviation...
06z tafs: satellite shows Strata cumulus persisting across extreme
eastern Washington and north Idaho with MVFR cigs. Anticipate some
clearing to VFR conditions during the overnight hours for the
eastern taf sites. Clouds increase from the west with the next
system. Light snow will move into the keat area by 16z with MVFR
cigs, followed by a rain/snow mix by afternoon. Mainly light rain
will spread across the Columbia Basin during the afternoon. Light
rain with MVFR cigs move into kgeg-kcoe, kpuw and klws by 00z with
MVFR cigs, then a rain snow mix and breezy south winds are
possible by early evening. Meanwhile precipitation looks to
decrease from west to east with some partial clearing. /Rfox

&&

Preliminary point temps/pops...
Spokane 30 39 29 37 27 35 / 10 10 90 20 10 20
Coeur D'Alene 29 40 30 36 27 35 / 10 10 90 40 30 20
Pullman 29 41 32 39 29 38 / 10 10 80 30 20 10
Lewiston 32 46 34 44 32 43 / 10 10 30 20 20 10
Colville 29 39 29 36 24 34 / 10 60 90 20 10 30
Sandpoint 29 39 30 35 26 33 / 20 20 90 60 30 20
Kellogg 28 39 29 34 27 34 / 30 10 80 60 50 20
Moses Lake 32 44 30 43 27 39 / 10 100 10 10 10 20
Wenatchee 30 36 27 38 25 32 / 10 90 20 10 10 50
Omak 29 36 26 35 23 31 / 20 100 60 10 10 50

&&

Otx watches/warnings/advisories...
Idaho...none.
Washington...Winter Weather Advisory from 4 am to 10 PM PST Sunday for east
slopes northern Cascades.

Winter Weather Advisory from 7 am to 10 PM PST Sunday for
Okanogan Highlands.

Winter Weather Advisory from 7 am to 7 PM PST Sunday above 2000
feet for Okanogan Valley-Waterville Plateau.

National Weather Service Glossary of Abbreviations