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Area forecast discussion 
National Weather Service Pendleton or
244 PM PDT Thursday Oct 8 2015

Short term...tonight through Saturday upper ridge will
continue over the Pacific northwest through tonight, then begin to
shift east Friday. Will see a gradual decrease in high cloudiness
over the region late this afternoon through tonight. Low level
inversions over the Columbia Basin had considerable difficulty
breaking today due to the high cloudiness. The failure of the
inversions to break completely caused temperatures in the basin to struggle
to warm. These inversions over the basin will continue, or redevelop
where they broke, tonight. Thus expect patchy fog to develop under
these inversions, though the fog in the Walla Walla area may linger
from this afternoon through the night. Low temperatures tonight should be a
bit cooler than this morning, but should remain above seasonal. Will
see more sunshine Friday, especially over our eastern zones. Thus
should see better warming than today, though the breaking of the
morning inversions will slow warming in the basin again. A Pacific
system will approach the region Friday night and Saturday. This
system will increase winds in the basin enough to break the low
level inversions late Saturday afternoon to allow for better warming
in the basin. Chances of precipitation will also increase along the Cascade
east slopes Friday night into Saturday due to the approach of the
next system. This system looks to push a cold front through the
region Saturday night, and should see varying chances of rain over
the region as a result. Winds will also become breezy to locally
windy with this front. 90

Long term...Sunday through Thursday night...breezy conditions will
continue across the lower elevations as westerly flow continues over
the inland northwest. There will still be some moisture associated
with this flow and a chance of showers will continue over the east
slopes of the Cascades and the mountains of northeast Oregon.
Overall this pattern will continue through the extended...only the
chances of precipitation look to be minimal Tuesday
drier air takes over. Winds could pick back up again on
Tuesday...but are not expected to be as strong as sudnay's winds.
Still breezy conditions will be possible. Have held off on any
significant increases as there is still some model uncertainty.
Overall high temperatures look to hold in the middle 70s for the lower
elevations...with 60s mountains. Lows look to be in the lower to middle
40s for the lower elevations and in the middle 30s to lower 40s
mountains. Weber


Aviation...00z tafs...various categories continue at low
clouds attempt to mix out. IFR-MVFR ceilings likely...but LIFR ceilings cant
be ruled out. Otherwise VFR conditions to prevail over the next 24
hours with light winds and ceilings around 10-25kft. Weber


Preliminary point temps/pops...
PDT 52 76 53 77 / 0 0 0 10
alw 57 74 58 78 / 0 0 0 10
psc 50 77 55 76 / 0 0 10 10
ykm 47 75 50 72 / 0 10 20 20
hri 49 78 53 77 / 0 0 10 10
eln 46 74 51 70 / 0 10 20 30
rdm 39 82 45 74 / 0 0 10 10
lgd 51 81 48 78 / 0 0 0 0
gcd 45 81 48 78 / 0 0 0 0
dls 51 76 54 72 / 0 10 20 40


PDT watches/warnings/advisories...

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