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Area forecast discussion 
National Weather Service Spokane Washington
847 PM PST Tuesday Feb 9 2016

Synopsis...
strong high pressure will persist into Wednesday, with dry and
mild conditions. A more progressive and unsettled pattern will
return late this week, bringing a chance of light rain Thursday in
the Cascades, then throughout the region Friday into the weekend.

&&

Discussion...

Rest of tonight: only very minor changes to a couple of low
temps for tonight...with the main focus still remaining on the
ever-present fog and/or low cloud fcst. Still... based on the
latest sfc obs, satellite, and how quickly the minor inbound wave
will reach the WA/ore coast overnight, the fog should be limited
to the nrn zones mtn valleys...slowly expanding from north to
south.Bz

&&

Aviation...
00z tafs: fog and stratus was observed for most of the mountain
valleys this morning and along the Spokane/Columbia
rivers...closer to water sources. The inversion will remain strong
again tonight and fog/stratus will likely form in those areas
again tonight. However the strong ridge of high pressure that has
been over the region will shift east and Bend slightly overnight.
This will allow upper level clouds to move into the region
overnight as well...and this may mitigate somewhat the strong
radiational cooling. In addition the surface flow will gradually
come around to southerly through the evening and this should pile
up the moisture for the northern valleys. With the exception of
the eastern basin and the Palouse at least some fog and stratus
will be possible for the taf sites. So klws/kpuw can expect VFR
conditions through 00z. At the other taf sites current VFR
conditions will likely drop down to MVFR cigs/vsby between 12-18z
then bounce back to VFR with a thickening but high cloud deck.
Tobin



&&

Preliminary point temps/pops...
Spokane 28 45 33 47 37 48 / 0 0 10 10 40 60
Coeur D'Alene 31 46 34 47 36 48 / 0 0 10 10 40 60
Pullman 38 51 40 53 40 53 / 0 0 10 10 20 50
Lewiston 38 54 42 57 42 58 / 0 0 10 10 20 40
Colville 28 40 32 41 33 43 / 0 0 10 20 60 60
Sandpoint 29 43 32 43 35 44 / 0 0 10 20 60 60
Kellogg 32 46 35 45 38 47 / 0 0 10 10 50 50
Moses Lake 29 47 34 48 38 49 / 0 0 10 10 20 50
Wenatchee 29 40 33 40 34 44 / 0 10 10 40 40 50
Omak 21 34 31 37 34 40 / 0 10 10 50 50 50

&&

Otx watches/warnings/advisories...
Idaho...none.
Washington...air stagnation advisory until 10 am PST Saturday for east slopes
northern Cascades-Moses Lake area-northeast mountains-
Okanogan Highlands-Okanogan Valley-upper Columbia Basin-
Waterville Plateau-Wenatchee area.

&&

$$

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