Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 301735
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1035 AM PDT SAT APR 30 2016

.SYNOPSIS...
Showers linger over the region today, with a threat of isolated
afternoon thunderstorms. High pressure builds Sunday and Monday,
resulting in a warming trend, with temperatures climbing into the
mid 70s to lower 80s. High pressure shifts east toward the middle
of next week, allowing a chance for showers and thunderstorms to
return.


&&

.DISCUSSION...
Morning update: a compact mid-level low near the lower ID
Panhandle is drifting southwest. Meanwhile a deformation axis
lingers on its northwest side. Both are providing a focus for
moisture, clouds and some isolated to scattered showers over the
eastern third of WA and north ID. As the day progresses models
shows the low clouds lifting and breaking up some. Yet any sun
breaks will contribute to instability showers and a threat of
isolated thunderstorms.

I expanded an isolated showers westward into the Okanogan
Highlands and Upper Columbia Basin, while kept coverage isolated
to scattered east of here. It still looks like the threat will
wane into this evening as the low moves into Oregon and the
deformation axis stretches and a ridge of high pressure moves in
overnight. Given trends, I removed a couple degrees from afternoon
highs across the eastern third of WA, but left them alone closer
to Cascades.

Yet given the showers today I will be looking to see if the threat
of patchy fog develops again tonight into early Sunday in the
sheltered valleys. Right now if it occurs it would be the mountain
valleys north of Spokane and perhaps around the Snake River Valley.
/J. Cote`

&&

.AVIATION...
18Z TAFS: Low pressure tracking southwest across the lower ID
Panhandle and boundary wrapped around its northwest side will
work with moisture and afternoon instability to bring BKN low to
mid clouds and widely scattered rain showers and a slight chance
of thunderstorms this afternoon. LCL MVFR cigs are possible. After
23-03Z high pressure starts to take hold, decreasing clouds and
ending the shower threat. Expect locally breezy conditions through
this afternoon near the Cascades, including EAT/MWH/OMK. These
will abate through the evening. Overnight/early Sunday there is a
small risk for patchy fog near the sheltered mountain valleys and
possibly near LWS. The risk is low. /J. Cote`


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        63  46  73  50  77  51 /  30  10   0   0   0   0
Coeur d`Alene  63  43  74  46  77  48 /  30  10   0   0   0   0
Pullman        59  42  71  45  75  48 /  50  20   0   0   0   0
Lewiston       63  46  75  49  80  51 /  40  10   0   0   0   0
Colville       66  42  79  44  80  45 /  40  20   0   0   0   0
Sandpoint      62  39  72  42  76  42 /  30  20   0   0   0   0
Kellogg        61  40  71  42  76  43 /  40  20   0   0   0   0
Moses Lake     72  44  79  47  83  48 /  10   0   0   0   0   0
Wenatchee      73  49  78  52  81  53 /  10   0   0   0   0   0
Omak           72  45  78  49  80  49 /  10   0   0   0   0   0

&&

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

$$


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