Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 050525
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1025 PM PDT FRI SEP 4 2015

.SYNOPSIS...

A low pressure system will bring widespread rain and much cooler
temperatures to the Idaho Panhandle and portions of Eastern
Washington Saturday. Light showers may linger mainly across the
mountains Sunday and Monday. A drying and warming trend is
expected next week.


&&

.DISCUSSION...
The upper level low is dropping south into Oregon this evening
with areas of showers and even a few thunderstorms being pushed
north into southeast WA and the central panhandle of ID.
Precipitation will increase over the region tonight as the best
area of lift moves over the eastern half of the forecast area.
Models are still depicting a bulls eye of precip over extreme
eastern WA overnight with a sharp dropoff in QPF from Ritzville
west. The wildfires in north ID will likely get a good wetting
rain out of this system along with the Kiniksu Complex in Pend
Oreille County and possibly the Carpenter Rd Complex in southern
Stevens County but the big fires in Okanogan and Chelan Counties
will get little if any precipitation. Only minor changes made to
the current forecast package to adjust PoPs and min temps to
account for recent trends in observations. /Kelch

&&

.AVIATION...
06Z TAFS: Showers will drift north into extreme southeast WA and
central panhandle of Idaho tonight along with isolated
thunderstorms possible but confidence is low that any TS will
affect a particular TAF site. The wettest interval will be
overnight tonight and into tomorrow as a wet frontal zone stalls
over Eastern Washington and North Idaho from about 09Z on bringing
MVFR conditions to TAF sites except KEAT and KMWH. KMWH will be on
the western edge of the precipitation shield and may see very
little rain. As the low moves east Sat afternoon, any breaks in
cloud cover may allow convection to develop, with isolated
thunderstorms possible across the forecast area. Cascade gap winds
will increase after 18Z Sat with gusts of 25 to 30 kts possible at
KEAT. /EK


&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        46  53  43  66  45  68 /  80 100  50  10  10  10
Coeur d`Alene  46  53  43  65  44  67 /  80  90  70  10  10  10
Pullman        44  53  41  64  43  66 /  90  70  60  10  10  10
Lewiston       50  60  48  72  50  72 /  80  70  60  10  10  10
Colville       49  57  44  67  41  70 /  40  90  50  20  20  10
Sandpoint      47  54  45  64  40  66 /  60 100  60  20  20  20
Kellogg        46  52  43  63  40  63 /  70  80  70  30  30  20
Moses Lake     53  71  49  75  48  76 /  30  50  10  10  10  10
Wenatchee      53  72  52  75  51  78 /  10  10  10  10  10  10
Omak           52  73  46  75  45  78 /  10  10  10  10  10  10

&&

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

$$


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