Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 020531
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1030 PM PDT WED JUL 1 2015

.SYNOPSIS....
Hot and dry weather will be featured into the Independence Day
weekend. Hottest days will likely be Thursday and Friday with many
valley sites topping the century mark. Breezes will be kicking up
as weather systems move across the strong upper level ridge.
Friday and Saturday winds are potentially looking more substantial
as a cool front tries to sag in from Canada eventually forcing
winds more from the north. It is still looking dry and warm even
into the beginning of next week.


&&

.DISCUSSION...

Tonight though Friday night: A ridge of high pressure will be the
dominate weather feature during this period continuing to deliver
excessive heat...record temperatures... and dry conditions.
Temperatures this afternoon are already in the 90s in most
locations and the mercury is going to continue to rise Thursday
and Friday. Consequently, heat advisories are in effect for the
lowlands stretching from the lower Idaho Panhandle...Columbia
Basin...and along the Highway 97 corridor. This is where
temperatures will achieve triple digit heat coupled with lows
generally warmer than 60-65F. For all other valleys not in the
advisory, temperatures will still be hot but look to top out in
the mid to upper 90s with an isolated 100-101F.

Winds will generally remain light Thursday following a weak northerly
push down the Okanogan Valley but will increase in the Cascade
Gaps and Columbia Basin Friday as the upper-level ridge becomes
dented. This will increase the potential for rapidly spreading
wildfires and a fire weather watch has been issued to address
these concerns. /sb

Saturday through Wednesday: We focused heavily on the weekend
winds following a frontal passage Saturday that will produce very
gusty north winds. The Okanogan valley and western Columbia Basin
will be the first to see these winds...with pressure gradients
supporting gusts up to 30-40 mph. For Sunday and Monday the
highest wind threat will shift east into the Spokane/ Coeur
D`alene and the North Idaho corridor of Boundary and  Bonner
counties. With this post-frontal dry air mass in place, there`s
only a slight chance of thunder near the BC border...and this won`t
be until Tuesday through Wednesday associated a second wave moving
southeast out of BC.bz


&&

.AVIATION... 06Z TAFS: Drier air over much of the region will result
in VFR conditions at all TAF sites through 06Z Friday. A weak upper
level impulse on Thursday may result in isolated thunderstorms in
the Northern Panhandle, but confidence is low. A slight increase in
winds up to 12 kts from the northeast is expected through the
Purcell Trench and out into KCOE between 12-18Z; otherwise, weak and
terrain driven winds at all other TAF sites. /SVH


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        67  98  69  99  66  95 /   0   0   0   0   0   0
Coeur d`Alene  61  95  63  97  62  94 /   0   0   0   0   0   0
Pullman        55  95  59  95  58  93 /   0   0   0   0   0   0
Lewiston       69 103  70 104  69 101 /   0   0   0   0   0   0
Colville       63 100  62 102  61  96 /   0   0   0   0   0   0
Sandpoint      56  94  55  95  55  92 /   0   0   0   0   0  10
Kellogg        58  95  60  96  61  93 /   0   0   0   0   0   0
Moses Lake     69 102  67 103  66 101 /   0   0   0   0   0   0
Wenatchee      73 103  73 103  71 102 /   0   0   0   0   0   0
Omak           67 102  66 104  64  96 /   0   0   0   0   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Heat Advisory until 9 PM PDT Friday for Lewis and Southern Nez
     Perce Counties-Lewiston Area.

WA...Heat Advisory until 9 PM PDT Friday for Lower Garfield and
     Asotin Counties-Moses Lake Area-Upper Columbia Basin-
     Washington Palouse.

     FIRE Weather Watch from Friday afternoon through Friday evening
     for East Washington Central Cascade Valleys (Zone 677)-East
     Washington South Central Cascade Valleys (Zone 676).

     Heat Advisory from 1 PM Thursday to 9 PM PDT Friday for Okanogan
     Valley-Wenatchee Area.

     FIRE Weather Watch from Saturday morning through Saturday
     evening for East Washington Northern Columbia Basin (Zone
     673)-East Washington Okanogan/Methow Valleys (Zone 684).

&&

$$


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