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Area forecast discussion 
National Weather Service Spokane Washington
1217 PM PDT Tue Jul 26 2016

Synopsis...
thunderstorms will develop over northeast Washington and the Idaho
Panhandle today and again on Wednesday. Locally heavy rain and
cloud to ground lightning will be possible with these storms. Dry
and hot weather is expected Thursday and Friday. A cold front is
expected to arrive this weekend bringing breezy conditions and
cooler weather for the start of next week.

&&

Discussion...

Steep mid-level lapse rates and the presence of a weak upper level
disturbance over northeast Washington continues to trigger high-
based showers and thunderstorms through the mid and late morning
hours. These widely scattered, small cells have been moving to
the east around 15 mph and have been capable of brief heavy
downpours. A cell recently moved over the Deer Park Airport and
produced 0.20 inches of rain quickly.

More showers and thunderstorms will develop this afternoon and
persist into the evening for our northern counties along the
Canadian border. As temperatures warm this afternoon, convection
will become deeper and surface based. These stronger cells will
likely initially form over the high terrain of the north Cascades
and Okanogan Highlands, and be capable of hail, frequent
lightning, and very heavy rain. Our surface dewpoints will be in
the upper 40s and lower 50s this afternoon which is relatively
rich for this time of year, so we may see some of these cells
persist well into the mid to late evening hours. /Gkoch

&&

Aviation...
18z tafs: high based showers and thunderstorms in the vicinity of
the Spokane Metro are expected to drift to the northeast in the
19-21z time frame. Additional showers and thunderstorms are
expected to develop over the high terrain of northern Washington
and north Idaho around 20z. This convection will likely be deeper
and stronger capable of producing locally heavy rain, small hail,
and frequent cloud to ground lightning. Airports that may be
impacted by these afternoon and evening thunderstorms are Omak,
Republic, Methow, Colville, Priest Lake, Bonners Ferry, and others
near the Canadian border. /Gkoch

&&

Preliminary point temps/pops...
Spokane 90 63 91 63 91 66 / 20 20 10 10 0 0
Coeur D'Alene 89 59 90 59 91 62 / 20 20 10 10 0 0
Pullman 90 53 90 53 91 56 / 10 0 0 0 0 0
Lewiston 98 66 97 67 97 68 / 10 0 0 0 0 0
Colville 89 56 92 57 93 58 / 40 30 20 10 0 0
Sandpoint 83 54 86 53 87 56 / 40 30 20 10 0 0
Kellogg 87 55 88 55 87 56 / 20 10 0 10 0 0
Moses Lake 96 62 95 63 97 66 / 10 0 0 0 0 0
Wenatchee 93 67 94 68 97 71 / 0 0 0 0 0 0
Omak 94 66 94 66 95 68 / 40 10 10 10 0 0

&&

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

$$

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