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Area forecast discussion 
National Weather Service Spokane Washington
236 am PST Friday Mar 6 2015

Synopsis...
the mild weather pattern this weekend will make it seem like
Spring has arrived. Temperatures this afternoon into this weekend
will be at least ten degrees above average. The next chance for
rain looks to be Wednesday and Thursday of next week with the
arrival of a mild Pacific system.

&&

Discussion...
today through sunday: a formidable high pressure ridge will remain
anchored over the western U.S. Through the weekend and into
Tuesday. We will see bands of high level cirrus spill over the top
of the ridge today and tonight. High level clouds should be on the
decrease Saturday into Sunday as the 500mb ridge axis retrogrades
and amplifies off shore leading to a drier northwest flow over the
inland northwest for the weekend. Temperatures will continue to
trend warmer today under mid-level subsidence. The early March
sunshine will push high temperatures into the mid to upper 50s
this afternoon with our typical low elevation warm spots like
Lewiston, Moses Lake, and Wenatchee near 60. Our dry low level air
mass will continue to modify the next couple of days. We may see a
bit of patchy fog development in the valleys of northeast
Washington and far north Idaho as early as Sunday morning. Any fog
development should be short-lived in the morning. It will be
increasingly difficult for fog to linger much past mid morning in
this warm air mass especially since we haven't had much
appreciable precipitation in a couple of weeks. /Gkoch

Monday through thursday: models continue to come into better
agreement during the extended period. Models show the dry and mild
weather pattern persisting into Tuesday as high pressure remains
in place. 850mb temps Tuesday climb to 6-8c near the Canadian
border and 10-12c near the Oregon border which should translate to
valley highs mainly in the upper 50s to mid 60s...or 10 to 15
degrees above normal. On Wednesday and Thursday the ridge flattens
and shifts east allowing a moist southwest flow to develop over
the area ahead of a closed low. Models have trended a bit milder
with snow levels only dropping to 5500-6500 feet. Models have not
been as consistent with precipitation amounts...although general
consensus from the 00z model runs is for only light to moderate
qpf totals during the Wed-Thu time frame...with westerly flow most
favoring the Cascade crest and Idaho Panhandle. A combination of a
dry low level air mass initially and potential for incoming short
waves to split or stretch as they move through could result in
just light precip amounts. Increased cloud cover should help cool
day time temps slightly...while resulting in mild overnight lows
for this time of year. Temperatures in general will remain above
normal through all of next week. Jw

&&

Aviation...
06z tafs: VFR conditions to prevail with passing middle and high
clouds at times. Most concentrated deck will be vcnty of keat and
kmwh associated with orographic cirrus. Winds gusting to 25 mph
near the Cascades, otherwise high pressure to remain aloft
delivering mild and dry conditions and generally light winds. /Sb




&&

Preliminary point temps/pops...
Spokane 56 34 56 35 57 36 / 0 0 0 0 0 0
Coeur D'Alene 55 33 56 32 57 33 / 0 0 0 0 0 0
Pullman 57 36 58 35 58 36 / 0 0 0 0 0 0
Lewiston 60 37 61 36 62 38 / 0 0 0 0 0 0
Colville 56 31 57 32 58 34 / 0 0 0 0 0 0
Sandpoint 51 31 52 30 52 32 / 10 0 0 0 0 0
Kellogg 51 34 52 34 53 36 / 0 0 0 0 0 0
Moses Lake 61 34 63 34 63 37 / 0 0 0 0 0 0
Wenatchee 60 38 61 40 62 41 / 0 0 0 0 0 0
Omak 56 34 59 34 60 36 / 0 0 0 0 0 0

&&

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

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