Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

fxus66 kotx 200601 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
1101 PM PDT Thu Oct 19 2017

Synopsis...
the forecast will remain wet and breezy at times tonight through
Friday as a low pressure system slowly sags through the region.
There will be a brief break in the precipitation Friday evening,
but that will be short lived as another warm...wet...and windy
weather system arrives on Saturday and exits Sunday. Drier
conditions are expected for much of next week.



&&

Discussion...
a cold front is taking its time to push across the inland
northwest. The upper level trough of lower pressure off the coast
has dug through the afternoon. This in effect oriented the jet
more meridional, which then limited the amount of westerly flow
to push the front across. Much of the rain along the front today
has remained over the basin and up into the Okanogan Highlands
and northeast mtns. The forecast was adjusted to move the front
through slightly slower. Rain is expected to start at Spokane
within the hour by 7:00 PM or so and into Coeur D'Alene closer to
8:00 PM. Pullman and Lewiston is expected to see rain start
between 9:00 and 11:00 PM. Some moderate rainfall amounts will be
possible with around a half an inch of rainfall expected over much
of extreme eastern Washington and into the Idaho Panhandle by Friday
morning. /Svh

&&

Aviation...

06z tafs: moderate rain will accompany a frontal passage across
extreme eastern Washington and into the Idaho Panhandle tonight into Friday
morning. MVFR cigs and vis is expected at kgeg, ksff, kcoe, kpuw
and klws with the rain tonight. Winds will then increase behind
the front on Friday. The atmosphere will also destabilize in the
afternoon with convective showers and possibly isolated
thunderstorms. Mountain obscurations across the region on Friday
as well. /Svh

&&

Preliminary point temps/pops...
Spokane 42 50 36 47 44 59 / 100 30 10 80 100 60
Coeur D'Alene 42 48 35 46 42 57 / 100 70 20 70 100 90
Pullman 41 49 36 49 44 58 / 100 40 10 80 100 90
Lewiston 45 56 39 53 47 64 / 100 30 10 80 90 70
Colville 43 52 34 46 40 57 / 100 30 10 80 100 70
Sandpoint 42 48 34 43 39 53 / 100 90 20 70 100 100
Kellogg 40 43 34 44 38 50 / 100 90 40 60 100 100
Moses Lake 44 57 37 51 47 64 / 100 10 0 100 80 30
Wenatchee 40 54 37 47 42 60 / 60 10 10 100 80 50
Omak 41 56 32 47 40 60 / 70 10 0 100 80 40

&&

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

National Weather Service Glossary of Abbreviations