Area Forecast Discussion
Issued by NWS Spokane, WA

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687
FXUS66 KOTX 132339
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
439 PM PDT Sun Oct 13 2019

.SYNOPSIS...
A weak weather system will bring spotty light showers through
tonight. Quiet weather returns Monday and Tuesday. A wetter weather
pattern is forecast for later in the work week with rain, high
mountain snow, and breezy winds. Temperatures will be slightly
cooler for the weekend.


&&

.DISCUSSION...
Tonight through Tuesday: A weak weather system is currently
making its way eastward across the Inland Northwest. Doppler radar
has consistently shown a band of light returns associated with
the front, with sprinkles or light showers possible today through
tonight.

High pressure will build into the region Monday into Tuesday,
bringing increasing subsidence and drier weather. The most
challenging aspect of the short-term forecast will be the
possibility of fog formation the next couple of nights. At this
stage, it appears the valleys of northern Idaho and NE Washington
have the best chance of fog developing overnight, with fog
possibly developing into the Spokane-CdA area and the Palouse.
Look for high temperatures generally in the mid 50s to mid 60s
Monday and Tuesday, which will be a few degrees cooler than normal
for this time of year.
Dang

Wednesday through Sunday: A Gulf of Alaska Low will push waves of
moisture through the Pacific Northwest through this period. Models
have been fairly consistent with this pattern and expected impacts
excluding the Basins daytime winds. The Cascades are expected to
feel the brunt of the moisture. The higher elevations of 5000ft and
abv can expect rain/snow through the period as the snow levels will
seesaw up and down between day and night. By Saturday cooler air
will begin to push into the region and begin a drop in the snow
levels. The Northern Mountains and Idaho Panhandle can expect a
lesser amount of moisture than the Cascades but still have the
rain/snow cycle. The prolonged rain could bring rises to local area
creeks and streams and impact some recent burn scars along the
Cascades. The Columbia Basin buoyed by the rain shadow effect will
be impacted by weak showers. The main for the Columbia Basin will be
the winds on Wednesday and Friday. Models have trending down on the
strength of the winds during the daytime. This could lead to the
Columbia Basin seeing gusts into the upper 20s and low 30s Mph.

Temperatures for the period will become milder and near the normals
for this time year. Highs will be in the 50s to low 60s. Lows will
be in the upper 30s and low 40s. Cooler air moves into the region by
the weekend and brings overnight lows back into the low 30s. Weekend
highs will be dipping into the 40s. /JDC

&&

.AVIATION...
00Z TAFS: A cold front extends from the Palouse into the ID
Panhandle. BKN to OVC skies will continue for the next several
hours for most TAF sites...with cigs lowering through the night
for GEG-SFF-COE-PUW-LWS. Scattered light showers or sprinkles
expected thru 04Z for COE-PUW-LWS. Ceilings may briefly lower
below 3K ft AGL around PUW & COE after 10z Mon but this carries
low confidence at this time so VFR conditions were maintained in
the TAFS.


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        33  55  33  58  40  58 /  10   0   0   0  10  30
Coeur d`Alene  34  54  33  59  40  59 /  10   0   0   0   0  30
Pullman        35  54  35  60  42  61 /  20   0   0   0  10  20
Lewiston       43  61  41  68  48  69 /  20   0   0   0   0  10
Colville       29  59  29  60  33  58 /  10   0   0  10  10  50
Sandpoint      34  53  33  57  38  56 /  20   0   0   0  10  40
Kellogg        38  50  35  58  43  60 /  30  10   0   0  10  20
Moses Lake     33  60  35  60  40  62 /   0   0   0  10  20  40
Wenatchee      39  59  40  57  45  58 /   0   0   0  10  40  70
Omak           35  58  37  57  40  56 /   0   0   0  10  20  70

&&

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

&&

$$



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