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Oregon, Central Willamette Valley

Areal Flood Advisory, Areal Flood Watch

Statement as of 12:36 PM PST on December 20, 2014

Expires 7:00 PM EST on December 22, 2014


The National Weather Service in Portland has issued a

* Urban and Small Stream Flood Advisory for...
western Yamhill County in northwestern Oregon...
Clatsop County in northwestern Oregon...
Tillamook County in northwestern Oregon...
Pacific County in southwestern Washington...
Wahkiakum County in southwestern Washington...

* until 330 PM PST

* at 1230 PM PST... emergency management and law enforcement have
reported issues with low lying roads flooding in northwest Oregon
and southwest Washington due to 1 to 3 inches of rain this
morning.

* Some locations that will experience flooding include...
Astoria... seaside... Warrenton... Cannon Beach... Long Beach...
Garibaldi... Manzanita... Grays River... Jewell... Pacific City...
Frances... Tillamook... Ocean Park... Raymond... South Bend... Rockaway
Beach... Ilwaco... Netarts... Camp rilea and Skamokawa.

This includes the following highways in Washington...
U. S. Highway 101 between mile markers 5 and 38... and between mile
markers 52 and 66.
State Route 4 between mile markers 1 and 34.
State Route 6 between mile markers 1 and 27.

This includes the following highways in Oregon...
U.S. Highway 26 west of Portland between mile markers 1 and 30.
U.S. Highway 30 west of Portland between mile markers 74 and 93.
U.S. Highway 101 between mile markers 6 and 93.
State Highway 6 between mile markers 1 and 28.

Precautionary/preparedness actions...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams... as well as farm and country roads. Do not
attempt to travel across flooded roads. Find alternate routes.

Landslides and debris flows are possible during this flood event.
People... structures and roads located below steep slopes... in canyons
and near the mouths of canyons may be at serious risk from rapidly
moving landslides.


Lat... Lon 4679 12337 4620 12323 4617 12342 4514 12346
      4513 12398 4623 12403 4615 12382 4618 12386
      4619 12332 4626 12349 4626 12348 4627 12408
      4664 12407 4665 12406 4637 12401 4670 12383
      4679 12410


Neuman


1216 PM PST Sat Dec 20 2014

The National Weather Service in Portland has issued a

* Urban and Small Stream Flood Advisory for...
southwestern Yamhill County in northwestern Oregon...
western Polk County in northwestern Oregon...
Lincoln County in western Oregon...
western Benton County in western Oregon...
southwestern Tillamook County in northwestern Oregon...
northwestern Lane County in western Oregon...

* until 315 PM PST

* at 1211 PM PST... emergency management and law enforcement have
reported flooded roadways and small stream flooding along the
central Oregon coast. 2 to 3 inches of rain have fallen in the
last 12 hours and allowed water to pool in low lying areas.

* Some locations that will experience flooding include...
Newport... Florence... Lincoln City... Waldport... Depoe Bay... Dunes
City... Otter Rock... Triangle Lake... Mapleton... Lincoln Beach...
Eddyville... Neskowin... Valsetz... Tidewater... Alsea... Blodgett...
Grand Ronde... Toledo... Willamina and Siletz.


This includes the following highways in Oregon...
U.S. Highway 20 west of Corvallis between mile markers 1 and 40.
U.S. Highway 101 between mile markers 96 and 121... between mile
markers 123 and 140... near mile marker 156... and between mile markers
182 and 198.
State Highway 18 between mile markers 1 and 28.
State Highway 22 from Valley Junction to Salem near mile marker 1.
State Highway 126 west of Eugene between mile markers 1 and 34.

Precautionary/preparedness actions...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams... as well as farm and country roads. Do not
attempt to travel across flooded roads. Find alternate routes.

Landslides and debris flows are possible during this flood event.
People... structures and roads located below steep slopes... in canyons
and near the mouths of canyons may be at serious risk from rapidly
moving landslides.


Lat... Lon 4462 12404 4460 12401 4463 12401 4463 12406
      4468 12408 4483 12407 4491 12401 4490 12403
      4508 12401 4512 12398 4512 12346 4387 12357
      4393 12366 4394 12383 4390 12392 4386 12393
      4386 12415


Neuman



821 am PST Sat Dec 20 2014

... Flood Watch remains in effect from 4 PM PST this afternoon
through Monday afternoon for southwest Washington and northwest
Oregon...

The Flood Watch continues for southwest Washington and northwest
Oregon from 4 PM PST this afternoon through Monday afternoon.


A classic atmospheric river type precipitation event is setting up
over the Pacific northwest today... which will continue to impact
the region into early Monday. A very long fetch of moisture with
origins west to the South China Sea is feeding into this
system... bringing the potential for very large rainfall totals
across the region. A deep and moist westerly flow will develop
today and continue through Sunday. With the flow forecasted to
remain perpendicular to the Coast Range and Cascades for an
extended period of time... expect strong orographic enhancement to
lead to the highest rainfall totals over the mountains. The Coast
Range... foothills and Cascades are expected to see in the range of
6 to 12 inches of rain... with locally higher amounts possible.
Lower but still significant totals are expected for the lower
terrain. Projected rainfall along the coast is forecasted to be
around 4 to 8 inches. The interior lowlands should see 1 to 4
inches... with the highest amounts closer to the Cascade foothills.

Given the latest forecasted rainfall totals... it appears that
there is the strong potential for flooding over the weekend on
numerous rivers and tributaries draining the Coast Range and
Cascades. A few rivers may even reach major flood stage. The
Current River stage forecasts indicate that the faster responding
rivers could reach flood stage as early as tonight. There are also likely
to be impacts from Urban and Small Stream flooding and flooding
along low lying pasture land.

In addition to the flooding concerns... excessive rainfall has the
potential to create landslides... debris flows... and excessive runoff
in the vicinity of recent wildfire burn scars. Burn scars from two
large fires this Summer... the 36 pit fire in the Clackamas river
basin near Estacada and the deception complex near Oakridge... will
be particularly vulnerable.


Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

Landslides and debris flows are possible during this flood event.
People... structures and roads located below steep slopes... in
canyons and near the mouths of canyons may be at serious risk
from rapidly moving landslides.

You should monitor later forecasts and be alert for possible
flood warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

The next update for this watch will be issued by 10 PM Saturday
night.




Weather Severe Map
American Samoa - Flash Flood Watch
California - Coastal Flood Advisory , High Surf Advisory, Coastal Flood Advisory , Coastal Flood Advisory, High Surf Advisory , High Surf Advisory , Wind Advisory , High Wind Warning, Wind Advisory , Beach Hazard Statement , Public Information Statement
Colorado - Winter Weather Advisory , Winter Storm Warning , Public Information Statement
Connecticut - Special Statement
Guam - High Surf Advisory
Hawaii - High Surf Advisory , High Surf Warning
Idaho - Wind Advisory , Winter Weather Advisory , Winter Storm Warning , Avalanche Warning , Record Report
Indiana - Public Information Statement
Kansas - Dense Fog Advisory
Kentucky - Public Information Statement
Louisiana - Record Report
Massachusetts - Special Statement
Minnesota - Winter Storm Watch , Special Statement
Mississippi - Record Report
Montana - High Wind Watch , High Wind Warning , Wind Advisory , Winter Storm Warning , Freezing Rain Advisory , Winter Weather Advisory
Nevada - Winter Weather Advisory
North Dakota - Special Statement
Oregon - Flood Warning , Areal Flood Watch , Areal Flood Watch, High Surf Advisory , Areal Flood Advisory, High Surf Advisory, Areal Flood Watch , Areal Flood Advisory, Areal Flood Watch , Flood Watch , Wind Advisory , High Wind Warning , High Wind Warning, Wind Advisory
Rhode Island - Special Statement
Texas - Record Report
Utah - Winter Storm Warning , Winter Storm Watch , Avalanche Warning , Public Information Statement
Washington - Flood Warning , Areal Flood Watch , Areal Flood Watch , Areal Flood Watch, High Surf Advisory , Areal Flood Advisory, Areal Flood Watch , Areal Flood Advisory, High Surf Advisory, Areal Flood Watch , Wind Advisory , High Wind Warning , Winter Weather Advisory
Wyoming - High Wind Warning , High Wind Watch , Winter Storm Warning , Winter Storm Watch , Public Information Statement
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