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Area forecast discussion
National Weather Service Spokane Washington
203 PM PDT Mon Jun 26 2017

Synopsis...
thunderstorms will move through the region this afternoon and
tonight. Some of these storms could be strong with gusty winds.
There will be a short cooling trend Tuesday and Wednesday with
isolated mountain showers on Wednesday. Then warmer conditions
will return Friday and Saturday.



&&

Discussion...
tonight: thunderstorms are firing over central Oregon this
afternoon and are headed north. Cam models have this fairly well
depicted, but look to be a few hours slow. These storms should
reach the Lewiston area around 5pm and the Spokane/cda area by
7pm. Strong winds will be the primary threat from these storms,
but some hail is also possible. After this activity moves into
Montana, a cold front will sweep through the area. This could
reorganize convection along a line in southeast Washington which would
move into the southern Panhandle overnight. These storms (if they
do form) would likely not pose any potential for damage. Rj

Tuesday and Wednesday...the upper level low will track slowly east
through with a couple of weak short waves wrapping through the
northeast portion of our forecast area. But with very dry air
moving in behind the cold front on Tuesday it doesn't look like
there will be much chance for any showers across the Northeast
Mountain or the north Panhandle. A bigger impact will be the
relative humidity dropping down to the teens to low 20 percent
across the region. Fortunately winds will be light. A little
deeper mid level moisture will wrap around the low on Wednesday
and will result in isolated showers over the mountains. The wave
on Wednesday will also increase the winds with gusts 15 to 20 mph
likely Wednesday afternoon. Temperatures will cool behind the
front into the lower 80s on Tuesday and 70s and 80s on Wednesday.

Thursday and Friday...high pressure will build in from the west
Thursday and Friday for a warming trend. Temperatures will bump
right back into the upper 80s to mid 90s by Friday. There is a
small chance for a weak wave to undercut the ridge on Friday which
would result in a few mountain showers near the Cascades, but
confidence is not very high at the time. Winds will be light and
variable.

Saturday through Monday...a series of weak disturbances will track
through b.C. Each of these waves will tap into some decent
moisture, enough to support late day showers and thunderstorms
across the northern zones, near the Canadian border. There will
also bring cooler temperatures to the region with high
temperatures cooling down into 70s and 80s, but still on the warm
side of normal. Tobin

&&

Aviation...
18z tafs: thunderstorms will affect many of the taf sites this
evening. The storms will move into the area from the south, and
gusty winds could impact the airports. Confidence of the storms is
high enough to put in the tafs, but the exact timing of the storms
and winds could easily be off by an hour or two. Rj



&&

Preliminary point temps/pops...
Spokane 60 83 55 81 56 85 / 50 0 0 10 10 0
Coeur D'Alene 58 80 52 78 52 82 / 60 0 0 10 10 0
Pullman 59 79 52 77 51 81 / 40 10 0 0 0 0
Lewiston 63 86 57 85 57 88 / 60 10 0 0 0 0
Colville 54 84 52 82 51 85 / 50 0 0 10 10 0
Sandpoint 53 80 48 77 47 80 / 60 0 0 20 20 0
Kellogg 54 77 51 75 50 78 / 50 10 0 20 10 0
Moses Lake 58 88 53 87 54 90 / 10 0 0 0 0 0
Wenatchee 60 86 57 84 58 90 / 20 0 0 0 0 0
Omak 55 86 52 84 53 88 / 20 0 0 10 0 0

&&

Otx watches/warnings/advisories...
Idaho...none.
Washington...red flag warning until 8 PM PDT this evening for East Washington

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