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Area forecast discussion 
National Weather Service Spokane Washington
335 am PST Thursday Mar 5 2015

Synopsis...
mild high pressure will build over the inland northwest the next
few days bringing a prolonged period of dry weather. Any meaningful
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 saturday: as the eastern United States continues to
feel winter's wrath, the Pacific northwest will remain experience
more unseasonably mild and dry weather the next several days.
Split flow over the western U.S. Will continue to direct the storm
track well north of our region. Our 500mb high pressure ridge will
flatten a bit today allowing some thin cirrus to pass over the
region. The high cloud cover probably won't inhibit our warming
trend much. We should see upper 40s to mid 50s in The Lowlands
today. Another upper level disturbance is progged by the models to
flatten the ridge on Saturday. At this time, it looks like
precipitation with this system will be well north of the British
Columbia border. The weekend is shaping up to be mild and dry with
relatively light winds. /Gkoch

Sunday through thursday: a ridge of high pressure remains parked
over the inland northwest for the weekend into early next week
with continued dry and mild weather. This ridge is fixed with a
low off the eastern Pacific while the northern storm track lies
across southern Canada. This storm track will help dampen the
ridge slightly by Monday. But by Tuesday, the medium range models
diverge with the GFS being the more aggressive and radial
solution compared to the ecwmf and Canadian. The GFS spins up a
stronger shortwave in the northern stream and drops down from the
Gulf of Alaska. Meanwhile the European model (ecmwf) and Canadian continue to keep the
ridge in place. The GFS ensemble plots suggest low confidence on
the operational GFS solution. Opted for a slower and more
conservative solution and leaned toward the Canadian, the more
medium of the Road solution. This pattern flattens the ridge
slightly to introduce a small chance of precipitation on Tuesday
night and into Wednesday. By mid week, the presence of the Pacific
low creeping closer to the West Coast, helps spread moisture into
the region. Despite the model discrepancies, all show a moister
flow. Still leaning toward the more consistent European model (ecmwf) and away from
the GFS which keeps snow levels and temperatures above normal.
/Rfox.

&&

Aviation...
12z tafs: bands of high level cirrus will spill over the flat
upper level ridge today and tonight. Winds will generally be light
and will experience afternoon upslope tendencies and downslope
evening and overnight tendencies. /Gkoch



&&

Preliminary point temps/pops...
Spokane 49 30 53 34 56 35 / 0 0 0 0 0 0
Coeur D'Alene 50 28 54 31 57 32 / 0 0 0 0 0 0
Pullman 51 32 56 36 57 34 / 0 0 0 0 0 0
Lewiston 55 33 60 37 61 37 / 0 0 0 0 0 0
Colville 51 25 55 30 58 32 / 0 0 0 0 0 0
Sandpoint 46 26 51 29 52 29 / 0 0 10 0 10 0
Kellogg 46 31 50 33 51 33 / 0 0 0 0 10 0
Moses Lake 54 30 60 34 61 35 / 0 0 0 0 0 0
Wenatchee 55 36 59 40 61 40 / 0 0 0 0 0 0
Omak 53 31 57 34 60 35 / 0 0 0 0 0 0

&&

Otx watches/warnings/advisories...
Idaho...none.
Washington...none.
&&

$$

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