Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 020536
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1036 PM PDT WED APR 1 2015

.SYNOPSIS...
A cool and showery spring weather pattern will continue through
the week and into the weekend. Nighttime freezing temperatures
will be common over the next 7 days with daytime temperatures in
the 50s. There will be the potential for a wetter system by Sunday
and Monday, which may result in some snow even in some higher
valleys.

&&

.DISCUSSION...
A cold upper trough will linger over the region tonight with 500mb
temps around -33C. Earlier today daytime heating and the cold pool
aloft resulted in scattered showers especially over northeast
Washington and the Idaho Panhandle along with a few thunderstorms.
A weak mid level disturbance helped trigger this convection as
well. A cluster of showers associated with this disturbance will slide
into southeast Washington, Lewiston area, and the Camas Prairie
through this evening with snow levels around 2500-3000 feet. Brief
accumulations of less than 1 inch will be possible in the Blue
mountains and the Camas Prairie as these showers pass through.
Behind this radar shows showers diminishing this evening over
northeast Washington and the north Idaho Panhandle and this drying
trend will reach southeast Washington and the Camas Prairie
overnight. With temperature and dew point spreads as of 8 pm of
3-7F at Felts Field, Deer Park, Coeur D`Alene, and Sandpoint and
the clearing skies there is a good chance of patchy fog
development especially over the more fog proned northern valleys.

A freeze warning remains in places for the Moses Lake, Lewiston,
and Clarkston areas. The latest MOS guidance shows freezing temps
being a marginal threat, but the potential still exists especially
around Moses Lake with dew points in the low to mid 20s so will
leave warning in place. JW

&&

.AVIATION...
06Z TAFS: Showers that occurred over Eastern Washington and North
Idaho have moistened the air mass more than previously thought.
With clearing skies tonight and looking at latest boundary layer
moisture progs off the GFS and NAM, KPUW looks most favored for
stratus development...followed by KCOE. KSFF will also be prone
due to heavy showers from the early evening and close proximity to
water. Mostly IFR/MVFR stratus is expected although patches of fog
will likely form as well...with 12-17z the main threat window. On
Thursday high pressure will begin nosing into the region and thus
the atmosphere will not be as unstable. However enough instability
will be present for isolated/scattered shower development mainly
over the eastern third of WA/N Idaho.  JW

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        30  53  33  55  31  51 /  10  10  10  20  20  20
Coeur d`Alene  28  52  30  55  29  52 /  10  20  20  20  30  30
Pullman        30  49  33  55  33  50 /  50  20  10  10  30  20
Lewiston       32  54  34  60  37  55 /  30  10  10  20  40  20
Colville       29  57  32  56  27  55 /  10  20  10  30  30  30
Sandpoint      27  52  28  53  28  51 /  20  30  30  20  40  40
Kellogg        29  47  31  51  31  49 /  40  30  30  30  40  40
Moses Lake     29  59  32  60  29  58 /   0   0   0  10  20  10
Wenatchee      36  60  38  59  34  57 /   0   0  10  20  30  10
Omak           31  60  32  59  29  57 /  10  10  10  30  30  20

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Freeze Warning from 2 AM to 9 AM PDT Thursday for Lewiston Area.

WA...Freeze Warning from 2 AM to 9 AM PDT Thursday for Lower Garfield
     and Asotin Counties-Moses Lake Area.

&&

$$




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