Area Forecast Discussion
Issued by NWS Spokane, WA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
000
FXUS66 KOTX 121805
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1005 AM PST Tue Dec 12 2017

.SYNOPSIS...
Strong high pressure will persist through Thursday night. The
lowlands of eastern Washington and north Idaho will continue to be
covered by low clouds while the mountains remain mild and mostly
clear. Chances for wintry precipitation increase Friday morning.
Unsettled weather expected through next weekend and early next
week with a good chance of light snow returning to the mountains.

&&

.DISCUSSION...

As of 10AM, the light radar return from drizzle across the metro
area appeared to be diminishing. These tiny droplets are tough for
the radar to detect especially beyond 20 or 30 miles from the
radar so there may be a bit of drizzle still falling in NE
Washington and far N Idaho. A quick look at pavement temperatures
from DOT sensors show upper 20s to around 30. While our air
temperatures will remain at or below freezing today in our
valleys, there should be enough influence from daylight to push
pavement temps into the mid 30s. By early afternoon, most surfaces
should be free of the glaze that many of us in the metro received
prior to sunrise. /GKoch

&&

.AVIATION...
18Z TAFS: Low clouds will remain trapped under a strong inversion.
The 10AM visible satellite shows a more expansive stratus deck
than yesterday at this time. A subtle shift to the south or
southwest in the boundary layer winds overnight filled the
valleys of NE WA and N ID with low clouds. This low level wind
shift also lifted low stratus upslope into Spokane and produced
flurries and light freezing drizzle early this morning. Radar
trends suggest that the drizzle has decreased and pavement
temperatures should climb above freezing by early afternoon.
/GKoch

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        28  25  31  25  30  27 /   0   0   0   0   0   0
Coeur d`Alene  31  25  33  25  32  27 /   0   0   0   0   0   0
Pullman        31  25  33  23  33  27 /   0   0   0   0   0   0
Lewiston       30  27  34  25  34  30 /   0   0   0   0   0   0
Colville       30  28  31  28  30  28 /   0   0   0   0   0  10
Sandpoint      32  20  33  17  31  25 /   0   0   0   0   0   0
Kellogg        31  21  31  19  32  26 /   0   0   0   0   0   0
Moses Lake     33  28  33  30  32  27 /   0   0   0   0   0  10
Wenatchee      32  28  32  29  32  28 /   0   0   0   0   0  10
Omak           32  29  33  30  32  29 /   0   0   0   0   0  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Air Stagnation Advisory until 10 AM PST Friday for Central
     Panhandle Mountains-Coeur d`Alene Area-Idaho Palouse-Lewis
     and Southern Nez Perce Counties-Lewiston Area-Northern
     Panhandle.

WA...Air Stagnation Advisory until 10 AM PST Friday for East Slopes
     Northern Cascades-Lower Garfield and Asotin Counties-Moses
     Lake Area-Northeast Blue Mountains-Northeast Mountains-
     Okanogan Highlands-Okanogan Valley-Spokane Area-Upper
     Columbia Basin-Washington Palouse-Waterville Plateau-
     Wenatchee Area.


&&

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.