Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 012330
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
430 PM PDT WED OCT 1 2014

.SYNOPSIS...
A weak weather disturbance will skim by the Inland NW overnight,
with some lingering clouds, breezy evening winds, and cooler
temperatures. High pressure will gradually build into the region
for the weekend and linger into the middle of next week. This will
result in generally dry weather and temperatures warming to above
average.

&&

.DISCUSSION...
Tonight: It will be another chilly night tonight. A west to east
surface pressure gradient will enhance the evening drainage wind
along the East Slopes of the Cascades, but farther east the
afternoon breeze should lay down quickly this evening. The passage
of a clipper type system through Alberta/Montana tonight will
usher in a weak push of cool and dry air into the northern zones
overnight. Mainly clear conditions, light winds and low dewpoints
should allow for some sheltered areas north and east of Spokane to
drop into the upper 20s and lower 30s. Areas of frost will be a
good bet around Priest Lake, Newport, Deer Park, Republic, and
Springdale. Some of the typical cool spots in Spokane may also dip
below 32 degrees for an hour or two tomorrow morning.

Thursday: Fog should be less of an issue Thursday morning than it
was today. We had showers yesterday to wet the ground around
Sandpoint, Cusick, and Kellogg. With no rain this afternoon and a
push of drier air from the north late tonight, fog should be
patchy and limited to warm water sources like Priest Lake, the
Pend Oreille River and other lakes of far north Idaho/NE
Washington. Temperatures on Thursday will continue to be a bit
cooler than average. A chilly start to the day and limited mixing
(light winds through the day) won`t help temperatures warm very
quickly. /GKoch

Thursday night through Sunday: The upper level ridge will
translate from the eastern Pacific to the Pacific Northwest for
the end of the week and weekend. Expect mainly dry condition and a
gradual warming trend. Temperatures Thursday night may be some of
the coldest of the week given the light winds and chilly low level
temperatures. Some patchy frost is possible in the northern
valleys. But then an upper level warm front will pass through the
region with mid and high clouds and temperatures will start
warming each day by Friday into the weekend. Now that October is
upon us, the sun angle will be an issue and maybe some valley
locations may not warm up as fast as they did several weeks ago.
Nonetheless, mild conditions can be expected. The upper ridge axis
will weaken and flatten by Saturday as a frontal band sags southward
across BC. Anticipate an increase of high and mid level clouds
Friday night and Saturday with a few mountain showers possible
near the Canadian border. This frontal band weakens substantially
Saturday night with the upper ridge rebuilding by Sunday. Winds
will remain fairly light with some downslope northwest breezes in
the lee side valleys during the overnight hours. Overall, the
weekend will be mild and partly sunny. /rfox.

Sunday night through Wednesday...The upper ridge is expected to
persist into Monday before gradually beginning to flatten Tuesday
and Wednesday. The upper jet through the extended period remains
north of the Canadian border resulting in weather systems passing
north of the area. This will result in dry conditions and above
normal temperatures for the Inland Northwest. 850mb temps Sunday
through Tuesday in the 14-17C range will support high temperatures
in the valleys mainly in the 70s...with the warmest spots such as
Wenatchee, Moses Lake, and Lewiston near 80F. These values are
about 10 degrees above normal for this time of year. Models
continue to show occasional bands of mid and high level clouds
passing through especially near the Canadian Border as systems
clips the area. JW

&&

.AVIATION...
00Z TAFS: Expect mostly clear skies for the TAF sites during the
next 24 hours. Some areas of high levels clouds will filter into
the region, meanwhile cumulus will be confined to mainly the
mountains with tops obscured. There is a good chance that areas
of fog and stratus will again develop across the northeast
valleys, in the vicinity of lakes and major rivers. Confidence is
low that it will develop at any TAF site. Gusty west/southwest
will quickly taper off after sunset with lighters winds
overnight. /EK


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        38  62  39  70  45  72 /   0   0   0   0   0  10
Coeur d`Alene  38  61  37  68  44  71 /   0   0   0   0   0  10
Pullman        37  62  38  72  44  73 /   0   0   0   0   0   0
Lewiston       44  68  43  77  48  78 /   0   0   0   0   0   0
Colville       38  64  35  71  43  73 /  10   0   0   0  10  10
Sandpoint      35  59  31  65  38  67 /  10   0   0   0   0  10
Kellogg        38  54  37  64  45  66 /   0   0   0   0   0  10
Moses Lake     39  69  39  75  47  79 /   0   0   0   0   0   0
Wenatchee      45  68  44  75  51  78 /   0   0   0   0   0  10
Omak           36  67  38  72  46  76 /   0   0   0   0  10  10

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.
&&

$$




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