Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 040520
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1020 PM PDT THU SEP 3 2015

.SYNOPSIS...
A cool and showery weather pattern is expected for the remainder
of the work week as a cold storm system moves by the area.
Widespread rain is expected in the Panhandle and portions of Eastern
Washington on Saturday. Drier and warmer weather is expected by
early next week.


&&

.DISCUSSION...
Shower activity has diminished this evening now that daytime
surface based instability has ended and the dry slot is moving
over much of eastern WA and north ID. The only area where a few
showers are lingering is in extreme NE WA along the international
border and right along the Cascade crest. There is still a chance
of showers tonight for the north Cascades where the moisture is
rotating around the upper low. There is a very low probability of
a thunderstorm or two as there is some mid level instability that
could be tapped into by a passing vort max circling the low.
Confidence is not sufficient to place thunder in the weather
grids. Some adjustments were made to overnight lows to brings the
northern valleys lower than last nights observed lows. With
clearing skies in the dry slot and generally light winds, we
should see readings a few degrees below the previous overnight
lows. /Kelch

&&

.AVIATION...
06Z TAFS: A low pressure system over western Washington will drop
south into Oregon tonight. This will result in isolated showers
along with a slight chance of thunderstorms mainly in the Cascades
and near the Canadian border. Convection is expected mainly over
the high terrain with the TAF sites remaining dry with a
continuation of VFR conditions. Winds will shift to the north
overnight with some gusty winds expected down the Okanogan valley
(KOMK) and less so down the Purcell Trench (KCOE). The next
precipitation expected to affect the TAF sites will begin after
00Z Saturday. /EK


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        43  70  47  58  46  68 /   0   0  50  70  50  10
Coeur d`Alene  40  70  47  60  46  67 /   0   0  50  70  50  10
Pullman        37  69  49  56  43  65 /   0  10  70  70  50  10
Lewiston       48  74  51  63  52  72 /  10  10  70  60  50  10
Colville       38  72  48  65  43  70 /  10   0  40  70  30  10
Sandpoint      37  68  47  61  42  65 /  10  10  50  70  50  20
Kellogg        39  66  46  57  46  64 /  10  30  60  70  50  20
Moses Lake     43  74  53  75  47  76 /   0   0  10  10  10  10
Wenatchee      50  74  51  77  57  76 /  20  10  10  10  10  10
Omak           45  73  48  77  47  76 /  30  10  10  10  10  10

&&

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

$$


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