Wind Advisory 6, NWS Pendleton, OR

575 
WWUS76 KPDT 292139
NPWPDT

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
139 PM PST Mon Jan 29 2018

...VERY WINDY ACROSS THE SOUTHERN GRANDE RONDE VALLEY THROUGH THIS
EVENING...

.Pressure gradients will increase ahead of this system resulting 
in strong winds across the southern end of the Grande Ronde 
valley. Breezy winds will occur elsewhere in the valley.

ORZ049-300600-
/O.CON.KPDT.WI.Y.0006.000000T0000Z-180130T0600Z/
Grande Ronde Valley-
139 PM PST Mon Jan 29 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING
FOR LADD AND PYLES CANYONS...

* WINDS...South 30 to 35 mph with gusts of 45 to 50 mph across 
  the south end of the valley. Elsewhere winds will be south 15 
  to 25 mph with gusts to around 35 mph.

* TIMING...Winds will continue into this evening and then 
  decrease and shift to the west overnight.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that winds of 30 to 35 mph are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

&&

$$

471 
WWUS76 KPDT 300543
NPWPDT

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
943 PM PST Mon Jan 29 2018


ORZ049-300645-
/O.EXP.KPDT.WI.Y.0006.000000T0000Z-180130T0600Z/
Grande Ronde Valley-
943 PM PST Mon Jan 29 2018

...WIND ADVISORY WILL EXPIRE AT 10 PM PST THIS EVENING FOR LADD
AND PYLES CANYONS...

Winds will continue to slowly diminish overnight.

$$
78

Area Forecast Discussion...Updated
National Weather Service Pendleton OR
402 AM PST Mon Jan 29 2018

Updated aviation discussion

.SHORT TERM...Today through Wednesday...The upper level ridge over
the Pacific Northwest will slide east today as the next Pacific
storm system moves towards the region. As such, will see mostly
cloudy skies with increasing chances of precip over south-central
Washington. Fog across the Columbia basin and in the gorge should
persist through the morning. Some locations have been seeing
visibilities reduced to around one quarter mile. Will monitor these
conditions as the morning commute approaches, as may need an
advisory. Likewise, winds at the south end of the Grande Ronde
valley are running between 15 and 30 mph. If these winds increase,
and they may, will need a wind advisory for that end of the valley.
The Pacific system will move across the region tonight. Snow levels
will lower behind the system's cold front late tonight into Tuesday.
For most areas the best precip amounts look to occur prior to the
fall of the snow levels. Thus snow accumulations will be limited.
The one area that may be an exception is western Kittitas county.
Slop over snow showers, in addition to any system snow, may total 2
to 7 inches late tonight through Tuesday night. Winds will also be
locally breezy from the southwest and west behind the front. A west-
northwest onshore flow will keep varying chances of showers going,
primarily over the higher terrain, Tuesday through Wednesday. Snow
levels will be rather low during this period, generally between 1000
and 3000 feet. 90

.LONG TERM...An offshore ridge will be in control of area weather
through the long term period through several disturbances will ride
over the ridge and keep a chance of rain and snow mainly over the
mountains. Wednesday night the ridge will be well offshore and the
pacific northwest will be under a moist northwest flow. Wednesday
night an upslope slope will yield a chance of snow showers in the
Washington Cascades and the northeast Oregon mountains north of John
Day. On Thursday a disturbance will move over the Cascades and
through the area. During the day snow levels will be around 4000
feet in central Oregon and around 2500 feet elsewhere before rising
Thursday night to 6000-7000 feet in Central Oregon and around 4000-
5000 feet elsewhere. The lower elevations, aside from parts of the
Washington Columbia Basin, will have a slight chance of rain with a
chance of snow changing to rain in the mountains. By Friday the
ridge will be strengthening and moving closer to the coast. The GFS
has another wave arriving Friday and snow levels up to around 6000
feet across the area so have kept a slight chance of rain in the
lower elevations and a chance of rain in the mountains Friday with
precipitation tapering off Friday night. Saturday through Monday the
ridge will have amplified. Disturbances will continue to ride over
the ridge but will mostly brush the northern half of the area.
Models have timing differences but generally the lower elevations
will be mostly dry and with snow levels remaining around 5000 feet.
The mountains will see a chance of rain becoming a slight chance
Sunday night and Monday. Temperatures will be in the upper 30s and
40s Thursday then rise to the 40s and lower 50s Friday and then to
the mid 40s to mid 50s Saturday through Monday. Perry

&&

.AVIATION...12Z TAFs...A ridge over the area will give way to a
storm system arriving this afternoon and tonight. Currently low
clouds and fog continue over the Columbia Basin TAF sites with
fluctuating conditions from VFR at KYKM to IFR/LIFR at KALW, KPDT,
KPSC and KDLS. Expect that this will continue through the morning
before improving. KYKM may deteriorate to MVFR/IFR as well but held
off mentioning in TAFs due to any significant signals in the last 5
or 6 hours. KYKM, KRDM and KBDN will have broken to overcast skies
at 10K-15K feet through 00Z. After 00Z, lower clouds and showers
will start moving into the area with MVFR/VFR ceilings and
visibilities expected at all TAF sites through 12Z tonight. Winds
will remain generally under 10 kts through 20Z then increase to 10-
15 kts with gusts to 25 kts after that. An exception will be KRDM
and KBDN which will continue at 10-15 kts for the next 24 hours with
gusts to 25 kts from 21Z-06Z. Perry

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  55  39  49  34 /   0  60  20  10
ALW  54  40  49  36 /   0  70  20  10
PSC  52  37  52  35 /  10  20   0   0
YKM  49  33  47  31 /  20  30  10  10
HRI  55  39  52  35 /   0  20  10  10
ELN  45  32  43  30 /  30  50  10  10
RDM  57  35  45  27 /   0  20  10  10
LGD  49  39  43  31 /   0  60  40  20
GCD  54  37  44  30 /   0  40  40  20
DLS  50  39  50  36 /  10  50  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

90/83/83