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fxus66 kotx 272109 
afdotx

Area forecast discussion
National Weather Service Spokane Washington
209 PM PDT Tue Jun 27 2017

Synopsis...
a weak weather disturbance will bring the threat of thunderstorms
to the northern mountains on Wednesday. Otherwise, the weather
will be dry and mild through the remained of the week. The weekend
will see continued dry weather but warmer temperatures. The a dry
cool front will bring breezy and milder weather to the region by
the 4th of July.

&&

Discussion...
tonight through thursday: the low that was partly responsible for
yesterday's weather is still up in BC/Alberta. The northerly flow
on the backside of this low will bring the chance of thunderstorms
to form over the northern mountains of Washington and Idaho. The
models are quite disparate on this situation. They also show
surface-based instability, but most don't show any precipitation
being generated. The European model (ecmwf) and sref about the only models with
precipitation. I've decided to put a slight chance of thunder
storms for northeast WA, the Pasayten Wilderness, an the northern
Panhandle. If any storms do develop, the northerly flow has the
potential to carry them off the mountains and in to the Spokane
Metro area. At this point i've left the mention of showers/storms
out of the Spokane/cda forecast, but the night shift may need to
add it.

By Thursday, the offshore ridge will amplify which should push any
shower chances off to the east. This will also begin the start of
the next round of warming temperatures. Rj

Friday through tuesday: the ridge that was in the area will begin
to flatten into a zonal flow pattern allowing a weak push of
moisture along the Canadian border and will bring a chance of some
light precip and possible isolated lightning strike. After a
brief ridge, a trof will move into the region beginning late
Sunday. The model agreement of how deep the trof digs is pretty
low but is expected to be a drier trof with very little precip
chances. This is expected to bring breezy conditions to the
Columbia Basin as the gradient tightens across the region.
Sustained winds in the low teens and gusts into the mid 20s will
be expected. Temperatures will be near normal with highs in the
upper 70s to 80s and lows in the 50s. /Jdc

&&

Aviation...
18z tafs: expect dry weather and mostly clear skies for the next
24 hours. Persistent breezy winds will blow at keat, kmwh and
kgeg. Rj





&&

Preliminary point temps/pops...
Spokane 56 82 57 84 60 89 / 0 0 10 0 0 0
Coeur D'Alene 53 78 53 81 55 86 / 0 10 20 0 0 0
Pullman 51 77 52 80 56 86 / 0 0 0 0 0 0
Lewiston 58 84 57 87 60 92 / 0 0 0 0 0 0
Colville 51 82 52 85 54 90 / 0 20 20 0 0 0
Sandpoint 47 78 47 79 50 83 / 0 30 30 10 0 0
Kellogg 51 75 51 78 53 83 / 10 20 20 10 0 0
Moses Lake 54 87 55 89 57 94 / 0 0 0 0 0 0
Wenatchee 59 84 59 88 62 93 / 0 0 0 0 0 0
Omak 53 85 54 88 56 92 / 0 10 0 0 0 0

&&

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

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