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Area forecast discussion 
National Weather Service Pendleton or
844 am PDT Tuesday Sep 30 2014

Short term...cold front has moved well east of the region however
upper level trough with cool cyclonic flow will remain over the
region today. Northwest upslope flow will keep skies mostly cloudy
over the Cascades and blues with isolated showers through evening.
Remainder of the forecast area mostly clear now but expect some
cumulus to develop with the cooler air aloft. Breezy to locally
windy conditions through the day. Strongest winds in The Gorge and
Kittitas Valley. Diminishing clouds and winds tonight with cool
temperatures. Some locations will drop below freezing...especially
central and northeast Oregon. 94

&&

Previous disc... /issued 109 am PDT Tuesday Sep 30 2014/

Short term...today through Thursday...a cold front which moved
across the County Warning Area last evening brought some rain showers to the eastern
County Warning Area. These have moved off to the east. Winds have picked up with and
behind the front to locally breezy to windy. The winds are expected
to increase further today. Winds in the Kittitas Valley are expected
to reach Wind Advisory speeds around 15-16z this morning. Will be
issuing a Wind Advisory from 15z-00z today for the Kittitas Valley
as a result. The strongest winds will occur during times of maximum
mixing this afternoon. After that time the winds are expected to
diminish quickly tonight as pressure gradients relax and due to
night time stabilization of the atmosphere. The next concern will be
cold temperatures tonight and Wednesday night. Temperatures tonight
in central Oregon (madras...Redmond and bend) are all expected to
drop to or below freezing. Will be issuing a freeze warning there
for tonight. On Wednesday night temperatures will not be as cold. On
Wednesday cool temperature will continue in a northwest flow aloft.
After that an upper ridge will begin to build back over the region
beginning on Thursday with a warming trend. 88

Long term...Thursday night through Tuesday...a ridge of high
pressure will build over western North America through the forecast
period. This will place the forecast area in fast westerly flow
aloft resulting in some cloud cover but little in the way of
precipitation. It will be warm with temperatures above normal for
this time of year. On Saturday...a weak disturbance will flatten the
ridge and perhaps push a weak cool front across the region from the
north. The models are showing limited moisture with this feature so
for now have confined probability of precipitation to the Washington Cascade crest. Any
moisture over the area will be short lived...with a return to dry
conditions for early next week. 78

Aviation...12z tafs...VFR conditions will prevail through the
forecast period. For much of the day expect scattered-broken stratocumulus at
4-6 kft with some middle level clouds above. Do not expect much in the
way of shower activity today at the taf sites. Winds will be a
concern with west winds of 15-25 miles per hour. Some higher gusts will be
possible at kpdt and kdls. Winds will diminish after 02z this
evening. 78

&&

Preliminary point temps/pops...
PDT 65 39 66 40 / 10 10 0 0
alw 66 42 66 44 / 10 10 0 0
psc 71 39 69 41 / 10 0 0 0
ykm 66 35 67 41 / 10 0 0 0
hri 69 37 68 40 / 10 0 0 0
eln 62 39 63 38 / 10 0 0 0
rdm 61 27 63 31 / 0 0 0 0
lgd 58 35 62 36 / 20 10 0 0
gcd 58 29 63 34 / 10 10 0 0
dls 67 43 68 44 / 10 10 0 0

&&

PDT watches/warnings/advisories...
or...freeze warning from 10 PM this evening to 9 am PDT Wednesday
orz511.

Washington...Wind Advisory until 5 PM PDT this afternoon waz026.

&&

For additional weather information, check our web site at...
www.Weather.Gov/Pendleton

$$

94

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