Area Forecast Discussion
Issued by NWS Spokane, WA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS66 KOTX 052227
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
227 PM PST THU MAR 5 2015

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

&&

.DISCUSSION...
Tonight through Saturday night...Ridge of high pressure gets flattened
a bit at times to allow some middle and high clouds to stream
through it. The ridge still retains enough strength to keep the
forecast void of significant shortwave passages through Eastern
Washington and North Idaho so a dry forecast remains with forecast
temperatures on the warm side of climo for this time of year. Very
minor disturbances of note would be one that passes through
Saturday into Saturday evening which may allow for a brief uptick
in low end gusty northerly winds down the Okanogan Valley to
perhaps as far south as Moses Lake. /Pelatti

Sunday through Monday: Temperatures are expected to peak this
weekend into early next week. High temperatures will be up around
10-15 degrees above normal and many locations are expected to
break the 60 degree mark. This warm up is not expected to be
record breaking, but there is a chance that a few sites come close
to their daily high temperature records. This will be especially
so on Monday when models indicated a little bit more wind in the
afternoon to delivery a better mixing potential.

Monday night through Thursday: Models are in good agreement that
the ridge of high pressure over the region will break down. This
will allow for an increasing chance for precip and bring an end to
our warm up. There will be two sources of energy out in the
eastern Pacific that will combine to break down the ridge. It is
looking more and more apparent that a cutoff low that becomes
pinched off at 35N 150W will have more of an influence than the
northern stream of energy diving down from the Gulf of Alaska.
This would result in a more mild break down of the ridge with
higher snow levels. This would also tap into a better sub-
tropical moisture reservoir with a better potential for
accumulating precip across the region. Since models have been
having a difficult time with this split flow regime upstream of
the ridge, my confidence in the details of the forecast is only
moderate at best at this time. Timing and precip amounts are still
a bit uncertain. Confidence is a bit higher that snow levels will
be up around 5,000 feet or higher, which would mean rain for most
locations except only across the higher mountain peaks. /SVH

&&

.AVIATION...
00Z TAFS: VFR conditions to prevail as rather thin middle and
high cloud will stream through the ridge of high pressure over the
aviation area at times over the next 24 hours. /Pelatti

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        30  54  34  57  35  57 /   0   0   0   0   0   0
Coeur d`Alene  27  55  31  57  32  58 /   0   0   0   0   0   0
Pullman        31  56  36  58  34  58 /   0   0   0   0   0   0
Lewiston       32  60  37  62  37  63 /   0   0   0   0   0   0
Colville       23  57  30  58  32  60 /   0   0   0   0   0   0
Sandpoint      26  51  29  52  29  53 /   0  10   0  10   0   0
Kellogg        31  51  33  52  33  54 /   0   0   0  10   0   0
Moses Lake     28  60  34  62  35  63 /   0   0   0   0   0   0
Wenatchee      36  59  40  60  40  64 /   0   0   0   0   0   0
Omak           31  57  34  59  35  62 /   0   0   0   0   0   0

&&

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

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.