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Area forecast discussion 
National Weather Service Spokane Washington
1107 am PDT Friday Aug 22 2014

Update...



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Synopsis...
Friday will bring another round of showers and thunderstorms to
the region with the potential for more flash flooding over the
Cascades burn scars. The threat of scattered showers and
thunderstorms will continue through the weekend. A drier and
warmer weather pattern is expected for the new work week.



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Discussion...

Rest of today: a weakening line of showers continues top push
through the southern Ferry, Stevens, and Pend Oreille counties
moving west to northwest around 15 miles per hour. These cells are producing
lightning and brief periods of heavy rains. As the day progresses
and the low shifts closer to Idaho, this line of showers will
swing into the Cascades and bring potential for flash flooding
mainly over recent burn scar areas. The bulk of the rain is
expected to fall around the 2 to 3 PM time frame. This flooding
can cause mud slides and debris flow. For the rest of the region,
convection in the afternoon will bring isolated thunderstorms.
These thunderstorms could produce brief heavy downpours and small
hail. The downpours can produce localized urban flooding. The best
time for convection will be around 2 to 6 PM. /Jdc

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Aviation...
18z tafs: broad area of low pressure aloft will promote widely
scattered showers and thunderstorms this afternoon. Every
terminal will stand a threat for storms, especially after 22z. As
the atmosphere stabilizes, the threat of thunderstorms in the
region diminishes after 03z. Winds will generally be out of the
north/northeast...locally gusty through the Okanogan Valley and
Purcell Trench impacting Omak...Sandpoint...and couer d Alene
airports. /Jdc



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Preliminary point temps/pops...
Spokane 75 55 75 54 79 56 / 40 30 10 10 20 30
Coeur D'Alene 73 54 73 51 77 53 / 50 30 10 10 20 30
Pullman 75 51 74 49 79 51 / 40 40 20 20 20 20
Lewiston 80 60 79 56 85 59 / 60 50 30 20 10 20
Colville 72 51 78 49 81 52 / 60 50 10 10 20 30
Sandpoint 69 50 71 46 75 49 / 70 40 10 20 20 30
Kellogg 68 52 67 47 72 53 / 70 40 40 20 30 30
Moses Lake 81 58 83 56 86 58 / 30 50 10 0 10 10
Wenatchee 80 63 82 58 84 64 / 40 60 10 10 20 10
Omak 79 59 82 53 85 58 / 50 40 10 10 20 10

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Otx watches/warnings/advisories...
Idaho...none.
Washington...Flash Flood Watch until 9 PM PDT this evening for east slopes
northern Cascades-Okanogan Valley-Wenatchee area.

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