Area Forecast Discussion
Issued by NWS Spokane, WA

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FXUS66 KOTX 041026
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
226 AM PST WED MAR 4 2015

.SYNOPSIS...
Mild high pressure will build over the Inland Northwest the next
few days bringing a prolonged period of dry weather.
Precipitation is not expected until Tuesday or Wednesday next
week. A warming trend is expected over the next few days. By
Friday, most areas will be about 10 degrees above average, and the
mild weather is expected to carry into early next week.


&&

.DISCUSSION...

Today through Friday: Split flow over North America will keep the
Inland Northwest high and dry through early next week. The
northern branch of the Polar Jet will remain well north of the
British Columbia border through the weekend. Today into Thursday,
a large 500mb high will spread on-shore leading to a moderation of
our resident chilly air mass. Look for temperatures to be 3 to 5
degrees warmer today than yesterday. The warming trend will
continue Thursday and Friday. By Friday, we are looking for
afternoon temperatures to be in the mid 50s to near 60 which is
10 degrees above average. A weak upper level disturbance will
over-top the ridge Thursday into Friday bringing an increase in
mid and high level clouds. The low level air mass will likely be
too dry for rain or snow, so precipitation chances have been
decreased to 20 percent or less, even in the mountainous zones.
/GKoch

Friday night through Wednesday: The upper level ridge will
continue to dictate the weather across the Inland Northwest with
mainly dry and mild conditions. With the ridge axis aloft anchored
off the coast, the flow aloft will be out of the northwest with
minor disturbances brushing along our northern border. Each
disturbance will provide an increase of cloud cover and possible
mountain sprinkles through the weekend. By early next week, the
GFS and ECMWF show subtle difference that weakens the confidence
for later portion of the forecast. The ECMWF wants to hold onto
the strong ridge while Pacific energy and moisture pools in the
eastern Pacific. This would keep the weather continued mild and
mostly dry. The GFS shows a more progressive pattern that flattens
the ridge and brings energy down from the Gulf of AK. The GFS
would bring more unsettled weather by Tuesday and into Wednesday.
Opted to follow the current slower trends depicted by the ECMWF
and keep a drier forecast through early next week. Temperatures
will warm each day and remain above normal for early next week.
/rfox.

&&

.AVIATION...
06Z TAFS: High pressure combined with a very dry low level
atmosphere will result in mostly clear skies and VFR conditions
through 06z Thursday.  JW

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        44  23  49  30  54  33 /   0   0   0   0   0   0
Coeur d`Alene  44  21  49  28  54  30 /   0   0   0   0   0   0
Pullman        44  26  52  29  56  34 /   0   0   0   0   0   0
Lewiston       49  27  56  33  58  36 /   0   0   0   0   0   0
Colville       46  21  52  28  55  30 /   0   0   0   0   0   0
Sandpoint      41  20  45  26  49  28 /   0   0   0   0  10   0
Kellogg        41  25  46  31  50  31 /   0   0   0   0  10  10
Moses Lake     51  22  54  29  59  34 /   0   0   0   0   0   0
Wenatchee      50  29  53  36  58  38 /   0   0   0   0   0   0
Omak           48  23  53  30  56  33 /   0   0   0   0   0   0

&&

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

$$



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