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Area forecast discussion 
National Weather Service Spokane Washington
838 am PDT Thursday Aug 21 2014

Update...



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Synopsis...
cooler temperatures and the occasional threat of showers and
thunderstorms will linger the rest of the week and into the
weekend. Thunderstorms will be slow moving with the cores of these
storms containing very heavy rainfall. This may lead to some rapid
runoff in steep terrain and possibly flash flooding or debris
flows, especially on burn scars along the east slopes of the
Cascades with Friday having the best potential. Warmer and drier
weather is expected toward the middle portion of next week.



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Discussion...
a quick update to the forecast to decrease the cloud cover across
the region mainly along the Idaho/Montana border. The threat of
thunderstorms for eastern Washington and Idaho Panhandle is
expected to begin in the early afternoon time frame. The eastern
Cascades could see an isolated thunderstorm in the late morning.
Flash flooding is still a threat for the Cascades region. Heavy
downpours from convective cells could bring large amounts of rain
to burn scar areas and cause mud slides and debris flows. /Jdc

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Aviation...
12z tafs: low pressure over the region will continue to bring isold
to scattered showers and thunderstorms across the northern
mountains...which will expand south toward the Hwy 2 corridor aft
23z. Conditions more favorable this aftn for storms to spread into
the Cascades and vcnty keat. Impacts from convection today will
include: outflow winds up to 35 mph, small hail and heavy rain.
A disturbance passing through overnight will keep a threat of
showers and a few thunderstorms across the region despite the
loss of daytime heating. /Sb



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Preliminary point temps/pops...
Spokane 77 55 74 52 76 54 / 20 30 40 30 10 10
Coeur D'Alene 76 53 71 52 74 53 / 40 40 50 30 10 10
Pullman 77 51 75 50 74 49 / 10 20 20 40 30 10
Lewiston 84 57 79 57 80 56 / 10 10 20 40 30 10
Colville 78 51 77 50 79 49 / 70 60 60 30 10 10
Sandpoint 71 49 68 49 74 46 / 60 60 70 30 10 10
Kellogg 70 50 65 49 70 47 / 40 30 70 50 40 20
Moses Lake 85 57 82 55 82 56 / 10 20 30 30 10 0
Wenatchee 83 58 80 59 83 58 / 10 20 50 30 10 10
Omak 83 56 79 55 83 55 / 30 60 50 30 10 10

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Otx watches/warnings/advisories...
Idaho...none.
Washington...Flash Flood Watch from Friday afternoon through Friday evening
for east slopes northern Cascades-Okanogan Valley-Wenatchee
area.

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