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Area forecast discussion 
National Weather Service Pendleton or
210 PM PDT Wednesday Jul 1 2015

Short term...tonight through Saturday...high pressure will continue
to dominate the weather across the forecast area through Saturday.
The ridge will amplify Thursday and Friday allowing for slightly
hotter temperatures which will produce near record high
temperatures. There will be an upper level low pressure system
moving out of the Gulf of Alaska and into western Canada late Friday
and Saturday. This will help flatten the ridge slightly and lower
temperatures around 2 to 5 degrees on Saturday. It will also create
some locally breezy conditions along portions of the east slopes of
the Cascades late Friday and Saturday.



Long term...Saturday night through Wednesday night...very warm/hot
temperature are expected to continue through the extended...as a
Four Corners high continues to hold with very little movement.
There will be a slight chance for thunderstorms across central
Oregon Sunday through Tuesday...as a low pressure system off the
California coast attempts to spin up middle level moisture and
instability to the area. All other areas can expect continued dry
conditions with mostly clear skies. If the low progresses further
inland and moves further north...expect an increase the chance of
thunderstorms across central Oregon and adjacent areas. High
temperatures will range from the lower 90s to around 100 for the
lower elevations with upper 70s to upper 80s mountains. Overnight
lows are expected to be warm and continue in the 60s for the lower
elevations and the middle 50s to lower 60s mountains. Weber



&&

Aviation...00z tafs...VFR conditions to prevail over the next 24
hours with mostly clear skies and winds less than 10kts. Weber



&&

Fire weather...cumulus clouds are developing over south central
Oregon with cloud tops cooling on infrared. There may be a rogue
thunderstorm south of Deschutes County in fire zone 611 this evening
so will keep in the forecast. There may be a few towering cumulus
in our southern zones on Thursday. The main fire weather concern
will be the dry and hot conditions...and any wind that increases may
result in rapid fire spread for new and existing fires. The Fire
Weather Watch that begins Thursday in the eastern Columbia River has
been changed to begin Friday afternoon. Winds should generally be
light in all zones Thursday. The winds on Friday and even on
Saturday are not expected to be very gusty with the exception of the
Kittitas Valley and the eastern Columbia River gorge. Will keep the
watch Friday afternoon through Saturday evening for the Oregon
Columbia Basin and central and north central Oregon and will also
include the Hanford district. The Fourth of July always poses a
concern for human caused fires in this area due to fireworks...and
even 10-20 miles per hour winds pose problems for rapid fire spread. Wister



&&

Preliminary point temps/pops...
PDT 65 102 67 102 / 0 0 0 0
alw 73 103 73 104 / 0 0 0 0
psc 70 104 69 105 / 0 0 0 0
ykm 68 103 70 103 / 0 0 0 0
hri 69 104 69 104 / 0 0 0 0
eln 65 103 66 101 / 0 0 0 0
rdm 60 99 59 97 / 0 0 0 0
lgd 57 97 59 97 / 0 0 0 0
gcd 60 102 61 101 / 0 0 0 0
dls 70 103 69 101 / 0 0 0 0

&&

PDT watches/warnings/advisories...
or...Fire Weather Watch from Friday afternoon through Saturday
evening for orz639.

Heat advisory until 8 PM PDT Thursday for orz041-510-511.

Fire Weather Watch from Friday afternoon through Saturday
evening for orz610-640-641.

Heat advisory until 8 PM PDT Friday for orz044.

Heat advisory from noon Thursday to 8 PM PDT Friday for orz507.

Washington...Fire Weather Watch from Friday afternoon through Saturday
evening for waz639.

Heat advisory until 8 PM PDT Thursday for waz024.

Fire Weather Watch from Friday afternoon through Saturday
evening for waz675.

Heat advisory until 8 PM PDT Friday for waz028.

Heat advisory from noon Thursday to 8 PM PDT Friday for waz026-
027-029.

&&

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

$$

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