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Area forecast discussion 
National Weather Service Spokane Washington
1057 am PDT Wednesday may 6 2015

Synopsis...
a low pressure system will result in afternoon convection once
again today...mainly over the Cascades and Okanogan Highlands.
The weather will generally be dry and warm through the end of the
workweek, except for a small chance of mountain showers over the
Idaho Panhandle on Friday. Temperatures will moderate a bit by
the weekend as another weak disturbance approaches the coast. This
feature will likely pass into the area early next week with a
return to cooler temperatures and a chance of precipitation.



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Discussion...
forecast overall remains on track for today. An elongated upper
level low pressure system will result in showers across much of
the higher terrain today. Current observations at 10:30 am already
shows that the ridge tops have reached their convective
temperature with showers being observed over the northern
mountains, in the Idaho Panhandle and over the NE blue mtns. Shower
coverage will increase with surface heating this afternoon. The
caveat will be over the basin and especially over the eastern
basin. Dew points are still quite low in the 20s and low 30s. This
is expected to result in more virga than anything over much of the
eastern portion of the basin. Colder temperatures aloft will
reside over the western portion of the forecast area, so the
western basin is expected to see some isolated shower activity in
the afternoon. Models continue to show a minimal thunderstorm
threat today. Best chances for isolated thunderstorms is expected
over the east slopes of the northern Cascades and the Okanogan
Highlands where 500 mb temps or coldest at around -28 to -29
celsius. /Svh



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Aviation...
18z tafs: VFR conditions expected at all taf sites through 18z
Thursday. An upper level trough of lower pressure will reside
over the region today. This will result in scattered showers
across the mountains and isolated showers into the western basin
through this afternoon. Some showers may become strong enough to
develop into thunderstorms over the Cascades and over the Okanogan
Highlands. The upper level low will drift south of the region
tonight with some wrap around moisture possible into klws and
kpuw. /Svh



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Preliminary point temps/pops...
Spokane 61 41 69 42 69 41 / 20 10 0 0 10 0
Coeur D'Alene 61 40 68 39 68 39 / 20 10 0 0 10 10
Pullman 59 40 67 38 69 37 / 10 10 10 10 10 0
Lewiston 65 44 73 44 74 44 / 10 20 10 10 10 0
Colville 64 41 72 41 73 40 / 30 20 0 0 10 0
Sandpoint 61 36 67 36 66 34 / 20 10 0 0 10 10
Kellogg 59 39 66 37 66 37 / 10 10 10 10 10 10
Moses Lake 67 43 76 46 77 44 / 20 10 0 0 0 0
Wenatchee 65 44 75 48 78 48 / 20 10 0 0 0 10
Omak 65 42 74 42 75 42 / 20 10 0 0 0 0

&&

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

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