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Area forecast discussion 
National Weather Service Spokane Washington
1031 PM PDT Tuesday Mar 31 2015

Synopsis...
an unsettled and ocassionally showery Spring-like weather pattern
will continue through the week and into the weekend. Widespread
freezing temperatures are possible Thursday and Friday morning.
Then anticipate more seasonal temperatures by early next week.



&&

Discussion...
update: the cold front responsible for the windy conditions over
much of central and eastern Washington today has shifted east of
the area with cooler and drier air moving in behind the front. Dew
points have fallen into the upper teens and 20s in many areas due
to the drier air. Radar this evening showed a few areas of showers
that linger. A cold pool aloft with 500mb temps down to -33c
combined with low level upslope flow is resulting in showers
across southeast Washington extending into the central Panhandle
mountains mainly over the high terrain. Showers also linger near
the Cascade crest with a Puget Sound convergence zone resulting in
a band of moderate snow between Stevens Pass and Snoqualmie Pass.
Radar trends as well as the hrrr suggest the heaviest snow tonight
should stay south of Stevens Pass although some travel impacts are
still possible between Stevens Pass and Leavenworth. Outside of
these areas most of the inland northwest is expected to remain dry
tonight. Pressure gradients will also be decreasing tonight which
combined with less mixing potential with the loss of daytime
heating will lead to decreasing winds through the night. However
very few changes were made to the forecast tonight. Main update
was to make slight changes to winds this evening based on latest
observations. Jw

&&

Aviation...
06z tafs: a cold upper level trof will remain over the region into
Wednesday. The atmosphere will destabilize Wednesday afternoon
promoting scattered showers and possibly a few thunderstorms
especially over northeast Washington and the Idaho Panhandle.
Several type of precipitation are possible with these
showers...including rain...snow...small hail...and graupel. Gusty
outflow winds will also be possible. Given that there is only a
slight chance of thunderstorms left mention out of all taf sites.
Thermal temperature profiles suggest the Idaho Panhandle having
the best opportunity for isolated thunderstorms. Jw

&&

Preliminary point temps/pops...
Spokane 33 51 29 52 31 54 / 10 50 20 20 20 20
Coeur D'Alene 31 51 28 50 30 54 / 10 60 30 30 30 20
Pullman 34 49 30 49 32 54 / 20 40 30 20 10 10
Lewiston 37 55 33 54 34 59 / 30 40 20 20 10 10
Colville 33 55 29 55 31 55 / 10 40 20 20 10 30
Sandpoint 31 51 27 50 28 52 / 20 60 20 40 30 40
Kellogg 31 45 29 45 31 50 / 20 60 50 50 30 20
Moses Lake 37 60 30 59 31 59 / 10 20 0 0 10 10
Wenatchee 38 58 34 59 37 58 / 10 20 0 10 10 20
Omak 32 57 30 59 32 58 / 10 30 10 10 10 30

&&

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

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