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Area forecast discussion 
National Weather Service Spokane Washington
237 PM PDT Wednesday Jul 29 2015

Synopsis....
Summer conditions return to the inland northwest as a ridge of
high pressure takes control. A dry and increasingly hot weather
pattern will persist through the weekend. The only chance of
precipitation in the near future will be a small chance of
thunderstorms over extreme southeast Washington and north-
central Idaho late this weekend and into early next week.



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Discussion...

Tonight through thursday: the models are in good agreement with
the high pressure building into the region. This will continue the
warming, drying trend during this period. There is not too much
weather to discuss as the dry air will keep the heat of precip or
thunderstorms to zero. Winds will be fairly calm as the pressure
gradient is not fairly tight in the region. Temperatures are
expected to be around 10 degrees above the normal for this time of
year. /Jdc

Thursday night through Wednesday...Friday appears to be the
hottest and driest day of the seven day forecast. An additional
nuisance will be a tightening pressure gradient resulting in some
breezing wording in the Cascade gaps. Some very slight cooling
occurs after when the longwave pattern undergoes subtle changes
with a minor disturbance flattening the top of it a bit and more
substantial disturbance coupled with monsoonal moisture runs up
from the south and brushes the southeast part of the forecast area
from about the Blue Mountains over to the Camas Prairie area as
early as Saturday night with other similar monsoonal moisture
coupled disturbances coming up Sunday. Sunday night on through
Wednesday another Gulf of Alaska low and associated trof remains
positioned off the coast and as a result positions the 500mb ridge
to the east over Montana. This positioning allows for potential
for additional shortwaves to run up underneath the west side of
the ridge with a southwest to northeast trajectory over eastern
Washington and northern Idaho. This flow pattern has enough of a
westerly component to down-slope off the Cascades to a certain
extend keeping a good portion of the forecast area dry with the
exception of perhaps moving the small mention of thunderstorms
further north over north Idaho. Forecast temperatures remain well
above average through this time interval. /Pelatti

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Aviation...
18z tafs: outside of some high clouds passing through the region,
VFR conditions will prevail. Light diurnal and terrain driven
winds are expected. /Jdc




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Preliminary point temps/pops...
Spokane 61 95 64 98 64 97 / 0 0 0 0 0 0
Coeur D'Alene 57 93 59 96 58 95 / 0 0 0 0 0 0
Pullman 54 94 57 97 56 96 / 0 0 0 0 0 0
Lewiston 63 102 68 104 69 103 / 0 0 0 0 0 10
Colville 56 96 57 100 57 99 / 0 0 0 0 0 0
Sandpoint 51 89 52 94 51 93 / 0 0 0 0 0 0
Kellogg 54 92 57 96 57 95 / 0 0 0 0 0 0
Moses Lake 60 99 62 102 63 101 / 0 0 0 0 0 0
Wenatchee 67 101 70 101 70 100 / 0 0 0 0 0 0
Omak 60 99 62 101 62 100 / 0 0 0 0 0 0

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