Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 301612
AFDOTX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
912 AM PDT Wed Jul 30 2014

.SYNOPSIS...
Sunny and hot weather will continue over the Inland Northwest
through at least Friday. Heat advisories are in effect for
portions of the Columbia Basin, Wenatchee area, the Washington
Palouse and the Lewiston/Clarkston areas. A gradual increase in
clouds over the next few days may knock temperatures down a few
degrees, but mid to upper 90s will be common through the work
week. The threat for thunderstorms should increase over the
weekend which will prevent temperatures from climbing to 100
degrees or more. Isolated thunderstorms today are not expected to
be strong or severe.


&&

.DISCUSSION...The forecast area will be located on the backside of
an upper level ridge and under a weak southwest flow aloft for the
next several days. Water vapor loops show a mid-level wave
approaching Southwest Oregon that will track to the northeast and
bring the potential for isolated thunderstorms in our southeast
zones later this afternoon and evening. The bulk shear is very
weak and the convective available potential energy (200-400 J/Kg
of 850-500MB MUCAPE) is not very strong... therefore any storms
that develop should be the garden variety type that will diminish
after sunset. Forecast was updated to remove the isolated
thunderstorms for the east slopes of the Northern Cascades south
of Okanogan County. Drier mid-level air will likely spread over
the western half of Washington today, but there may be buildups or
even a thunderstorm near the Carlton and Chiwaukum Complexes that
will need to be monitored. A heat advisory was also issued for the
Wenatchee area, Waterville Plateau, the Upper Columbia Basin, and
the Lewiston/Clarkston areas. Wister

&&

.AVIATION...
18Z TAFS: Scattered mid/high level clouds will continue to
overspread most sites through the period. Isolated showers and
thunderstorms may develop across the far northern Cascades and NE
Blue Mts into the Idaho panhandle this afternoon but confidence is
very low that convection will affect any TAF site. MCW



&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        97  67  96  67  94  65 /   0  10  10   0  10   0
Coeur d`Alene  95  62  94  61  93  62 /  10  10  10  10  10  10
Pullman        95  56  94  59  92  57 /  10  10  10  10  10  20
Lewiston      102  70 101  71  99  68 /  10  10  10  10  20  20
Colville      102  57 101  58  97  59 /  10  10  10  10  10  10
Sandpoint      93  54  92  54  90  56 /  10  10  10  10  10  10
Kellogg        93  61  93  61  91  62 /  10  10  20  10  10  20
Moses Lake    102  64 101  64  99  64 /  10   0   0  10  10  10
Wenatchee     100  71 100  71  98  71 /  10   0   0  10  10  10
Omak          102  65 100  65 100  68 /   0   0   0   0  10   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Heat Advisory until 8 PM PDT this evening for Lewiston Area.

WA...Heat Advisory until 8 PM PDT this evening for Moses Lake Area-
     Okanogan Valley-Upper Columbia Basin-Waterville Plateau-
     Wenatchee Area.

&&

$$







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