Weather Alerts for W. Valley

Issued by the National Weather Service

High Wind Warning  HIGH WIND WARNING   High Wind Warning
W. VALLEY

Areas Affected:
Central Coast of Oregon - Central Oregon Coast Range
Effective: Thu, 12/18 1:04pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 7:00pm Severity:  Severe  Certainty: Likely

 
Details:
* WHAT...Southwest winds 20 to 30 mph with gusts up to 60 mph.

* WHERE...Central Coast of Oregon and Central Oregon Coast Range.

* WHEN...Until 7 PM PST this evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.

Information:
Prepare for potential power outages. If you have a gas-powered
generator, ensure you have enough fuel. Ensure you have batteries,
flashlights, and a way to maintain a safe body temperature if you
were to lose heating and cooling.

Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Monitor the latest forecasts and warnings for updates.

High Wind Warning  HIGH WIND WARNING   High Wind Warning
W. VALLEY

Areas Affected:
Lane County Cascade Foothills
Effective: Thu, 12/18 1:04pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 7:00pm Severity:  Severe  Certainty: Likely

 
Details:
* WHAT...Southwest winds 20 to 25 mph with gusts up to 60 mph,
mainly over peaks.

* WHERE...Lane County Cascade Foothills.

* WHEN...Until 7 PM PST this evening.

* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.

Information:
Prepare for potential power outages. If you have a gas-powered
generator, ensure you have enough fuel. Ensure you have batteries,
flashlights, and a way to maintain a safe body temperature if you
were to lose heating and cooling.

Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Monitor the latest forecasts and warnings for updates.

Flood Warning  FLOOD WARNING   Flood Warning
W. VALLEY

Areas Affected:
Benton, OR - Polk, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 3:45pm Urgency: Immediate
Expires: Thu, 12/18 10:30pm Severity:  Severe  Certainty: Observed

 
Details:
...The Flood Warning continues for the following rivers in
Washington...Oregon...

Cowlitz River at Kelso affecting Cowlitz County.

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River at Estacada affecting Clackamas County.

Clackamas River near Oregon City affecting Clackamas County.

Sandy River near Bull Run affecting Multnomah and Clackamas
Counties.

Hood River Near Hood River affecting Hood River County.

Siuslaw River near Mapleton affecting Lane County.

Molalla River near Canby affecting Clackamas County.

Marys River near Philomath affecting Benton County.

Pudding River at Aurora affecting Marion and Clackamas Counties.

Luckiamute River near Suver affecting Polk and Benton Counties.

S Yamhill River at McMinnville affecting Yamhill County.

...The Flood Warning is extended for the following rivers in
Oregon...

Siletz River at Siletz affecting Lincoln County.

Trask River near Tillamook affecting Tillamook County.

* WHAT...Moderate flooding is forecast.

* WHERE...Luckiamute River near Suver.

* WHEN...From Friday morning to early Sunday afternoon.

* IMPACTS...Above 29.0 feet, expect widespread flooding of the
lowland agricultural lands upstream from Falls City and Maple
Grove to the confluence with the Willamette River. Also expect
flooding and possible closure of numerous secondary roads near the
river.

* ADDITIONAL DETAILS...
- At 9:50 AM PST Thursday the stage was 19.1 feet.
- Bankfull stage is 25.0 feet.
- Forecast...The river will rise above flood stage Friday
morning and crest around 30.1 feet Saturday morning. It will
then fall below flood stage Sunday morning.
- Flood stage is 27.0 feet.
- http://www.weather.gov/safety/flood

Information:
Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Motorists should not attempt to drive around barricades or drive
through flooded areas.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued this evening at 1030 PM PST.

Flood Warning  FLOOD WARNING   Flood Warning
W. VALLEY

Areas Affected:
Yamhill, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 3:45pm Urgency: Immediate
Expires: Thu, 12/18 10:30pm Severity:  Severe  Certainty: Observed

 
Details:
...The Flood Warning continues for the following rivers in
Washington...Oregon...

Cowlitz River at Kelso affecting Cowlitz County.

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River at Estacada affecting Clackamas County.

Clackamas River near Oregon City affecting Clackamas County.

Sandy River near Bull Run affecting Multnomah and Clackamas
Counties.

Hood River Near Hood River affecting Hood River County.

Siuslaw River near Mapleton affecting Lane County.

Molalla River near Canby affecting Clackamas County.

Marys River near Philomath affecting Benton County.

Pudding River at Aurora affecting Marion and Clackamas Counties.

Luckiamute River near Suver affecting Polk and Benton Counties.

S Yamhill River at McMinnville affecting Yamhill County.

...The Flood Warning is extended for the following rivers in
Oregon...

Siletz River at Siletz affecting Lincoln County.

Trask River near Tillamook affecting Tillamook County.

* WHAT...Minor flooding is forecast.

* WHERE...S Yamhill River at McMinnville.

* WHEN...From Friday evening to Saturday afternoon.

* IMPACTS...Above 54.0 feet, numerous secondary and minor access
roads begin to flood. Road closures are possible at a few
locations.

* ADDITIONAL DETAILS...
- At 9:30 AM PST Thursday the stage was 29.8 feet.
- Bankfull stage is 45.0 feet.
- Forecast...The river will rise above flood stage Friday
evening and crest around 53.8 feet Saturday morning. It will
then fall below flood stage later on Saturday.
- Flood stage is 50.0 feet.
- http://www.weather.gov/safety/flood

Information:
Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Motorists should not attempt to drive around barricades or drive
through flooded areas.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued this evening at 1030 PM PST.

Flood Warning  FLOOD WARNING   Flood Warning
W. VALLEY

Areas Affected:
Clackamas, OR - Marion, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 3:45pm Urgency: Immediate
Expires: Thu, 12/18 10:30pm Severity:  Severe  Certainty: Observed

 
Details:
...The Flood Warning continues for the following rivers in
Washington...Oregon...

Cowlitz River at Kelso affecting Cowlitz County.

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River at Estacada affecting Clackamas County.

Clackamas River near Oregon City affecting Clackamas County.

Sandy River near Bull Run affecting Multnomah and Clackamas
Counties.

Hood River Near Hood River affecting Hood River County.

Siuslaw River near Mapleton affecting Lane County.

Molalla River near Canby affecting Clackamas County.

Marys River near Philomath affecting Benton County.

Pudding River at Aurora affecting Marion and Clackamas Counties.

Luckiamute River near Suver affecting Polk and Benton Counties.

S Yamhill River at McMinnville affecting Yamhill County.

...The Flood Warning is extended for the following rivers in
Oregon...

Siletz River at Siletz affecting Lincoln County.

Trask River near Tillamook affecting Tillamook County.

* WHAT...Minor flooding is forecast.

* WHERE...Pudding River at Aurora.

* WHEN...From Friday morning to late Tuesday morning.

* IMPACTS...Above 27.0 feet, expect widespread flooding of numerous
secondary roads and agricultural land.

* ADDITIONAL DETAILS...
- At 10:00 AM PST Thursday the stage was 15.9 feet.
- Bankfull stage is 21.0 feet.
- Forecast...The river is expected to rise above flood stage
Friday morning and crest around 26.0 feet late Saturday
morning. It will then fall below flood stage early Tuesday
morning.
- Flood stage is 22.0 feet.
- http://www.weather.gov/safety/flood

Information:
Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Motorists should not attempt to drive around barricades or drive
through flooded areas.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued this evening at 1030 PM PST.

Flood Warning  FLOOD WARNING   Flood Warning
W. VALLEY

Areas Affected:
Lane, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 3:45pm Urgency: Immediate
Expires: Thu, 12/18 10:30pm Severity:  Severe  Certainty: Observed

 
Details:
...The Flood Warning continues for the following rivers in
Washington...Oregon...

Cowlitz River at Kelso affecting Cowlitz County.

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River at Estacada affecting Clackamas County.

Clackamas River near Oregon City affecting Clackamas County.

Sandy River near Bull Run affecting Multnomah and Clackamas
Counties.

Hood River Near Hood River affecting Hood River County.

Siuslaw River near Mapleton affecting Lane County.

Molalla River near Canby affecting Clackamas County.

Marys River near Philomath affecting Benton County.

Pudding River at Aurora affecting Marion and Clackamas Counties.

Luckiamute River near Suver affecting Polk and Benton Counties.

S Yamhill River at McMinnville affecting Yamhill County.

...The Flood Warning is extended for the following rivers in
Oregon...

Siletz River at Siletz affecting Lincoln County.

Trask River near Tillamook affecting Tillamook County.

* WHAT...Minor flooding is forecast.

* WHERE...Siuslaw River near Mapleton.

* WHEN...From late tonight to Friday afternoon.

* IMPACTS...Above 19.1 feet, The flow at this level is about 24,600
cfs and has an annual chance of 50 percent (aka 2-year flood).

* ADDITIONAL DETAILS...
- At 10:00 AM PST Thursday the stage was 7.6 feet.
- Bankfull stage is 15.0 feet.
- Forecast...The river is expected to rise above flood stage
tonight and crest around 18.9 feet late tonight. It will then
fall below flood stage late Friday morning.
- Flood stage is 18.0 feet.
- http://www.weather.gov/safety/flood

Information:
Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Motorists should not attempt to drive around barricades or drive
through flooded areas.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued this evening at 1030 PM PST.

Winter Weather Advisory  WINTER WEATHER ADVISORY   Winter Weather Advisory
W. VALLEY

Areas Affected:
North Oregon Cascades - Cascades of Marion and Linn Counties - South Washington Cascades
Effective: Thu, 12/18 1:58pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Fri, 12/19 7:00am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...Snow expected. Total snow accumulations of 6-12 inches
above 3000 feet, except up to 14-16 inches above 2500 feet in the
south Washington Cascades. Winds gusting as high as 40 mph.

* WHERE...In Oregon, North Oregon Cascades and Cascades of Marion
and Linn Counties. In Washington, South Washington Cascades.

* WHEN...From 4 AM Friday to 10 AM PST Saturday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

Information:
Have a winter emergency driving kit readily available. Common items
to include: flashlight, batteries, blankets, a shovel, water,
non-perishable food items, tire chains, etc.

Be aware that walking surfaces may be slick. Walk with extra care.

For the latest road conditions and chain restrictions in Oregon,
call 5 1 1, or visit: www.tripcheck.com.

For the latest road conditions and chain restrictions in Washington,
visit: wsdot.com/travel/real-time/map

Winter Weather Advisory  WINTER WEATHER ADVISORY   Winter Weather Advisory
W. VALLEY

Areas Affected:
Cascades of Lane County
Effective: Thu, 12/18 1:58pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Fri, 12/19 7:00am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...Snow expected. Total snow accumulations of 6-11 inches,
mainly above 4500 feet. Winds gusting as high as 40 mph.

* WHERE...Cascades of Lane County.

* WHEN...From 4 AM Friday to 4 AM PST Saturday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

Information:
Have a winter emergency driving kit readily available. Common items
to include: flashlight, batteries, blankets, a shovel, water,
non-perishable food items, tire chains, etc.

Be aware that walking surfaces may be slick. Walk with extra care.

For the latest road conditions and chain restrictions in Oregon,
call 5 1 1, or visit: www.tripcheck.com.

For the latest road conditions and chain restrictions in Washington,
visit: wsdot.com/travel/real-time/map

Coastal Flood Advisory  COASTAL FLOOD ADVISORY   Coastal Flood Advisory
W. VALLEY

Areas Affected:
Clatsop County Coast - Tillamook County Coast - Central Coast of Oregon
Effective: Thu, 12/18 3:32pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 11:45pm Severity: Minor Certainty: Likely

 
Details:
* WHAT...Tidal overflow flooding expected.

* WHERE...North and Central Coast of Oregon.

* WHEN...From 10 AM to 4 PM PST Friday. The highest threat for
minor flooding is during the high tides from 11 AM to 1 PM PST.

* IMPACTS...Minor flooding and erosion, up to one foot above
ground level, during high tides is expected in the low lying
areas near bays, sloughs, and the lower reaches of the coastal
rivers.

* ADDITIONAL DETAILS...The tidal overflow concerns are due to the
combination of high river levels and high tides..

Information:
A Coastal Flood Advisory means that tidal overflow flooding is
expected. Coastal residents in the warned area should be alert
for rising water, and take appropriate action to protect life and
property.

Do not drive around barricades or through water of unknown depth.
Take the necessary actions to protect flood-prone property.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
W. VALLEY

Areas Affected:
Clackamas, OR - Columbia, OR - Multnomah, OR - Washington, OR - Yamhill, OR - Clark, WA - Skamania, WA
Effective: Thu, 12/18 3:37pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 7:30pm Severity: Minor Certainty: Likely

 
Details:
* WHAT...Urban and small stream flooding caused by excessive
rainfall is expected.

* WHERE...Portions of northwest Oregon, including the following
counties, Clackamas, Columbia, Multnomah, Washington and Yamhill
and southwest Washington, including the following counties, Clark
and Skamania.

* WHEN...Until 730 PM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
River or stream flows are elevated.

* ADDITIONAL DETAILS...
- At 335 PM PST, Doppler radar and automated rain gauges
indicated moderate to heavy rain. This will cause urban and
small stream flooding. Between 1 and 2 inches of rain have
fallen with hourly rainfall rates ranging between 0.10 inches
per hour and 0.30 inches per hour.
- Additional rainfall amounts of 0.5 to 1 inches are expected
over the area through 730 pm. This additional rain will
result in minor flooding.
- Some locations that will experience flooding include...
Hillsboro, McMinnville, Oregon City, Battle Ground,
Washougal, St. Helens, Sandy, Woodland, Stevenson, Cascade
Locks, Portland Downtown, Vancouver Downtown, Portland,
Vancouver, Gresham, Beaverton, Tigard, Lake Oswego, Tualatin
and West Linn.
- http://www.weather.gov/safety/flood

Information:
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

Wind Advisory  WIND ADVISORY   Wind Advisory
W. VALLEY

Areas Affected:
North Oregon Coast Range Lowlands - North Oregon Coast Range - Lower Columbia River - Tualatin Valley - West Hills and Chehalem Mountains - Inner Portland Metro - East Portland Metro - Outer Southeast Portland Metro - Willapa and Wahkiakum Lowlands - Willapa Hills - Cowlitz County Lowlands - North Clark County Lowlands - Inner Vancouver Metro - East Clark County Lowlands - South Washington Cascade Foothills
Effective: Thu, 12/18 1:04pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 7:00pm Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...South winds 15 to 20 mph with gusts up to 45 mph expected.

* WHERE...Greater Portland/Vancouver Metro, Willapa Hills and
Adjacent River Valleys of Pacific and Wahkiakum Counties, Lower
Columbia River and Cowlitz River Valleys, North Oregon Coast Range
Lowlands, North Oregon Coast Range, and South Washington Cascade
Foothills.

* WHEN...Until 7 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects.
Saturated soils could result in downed trees, and tree limbs could
be blown down. Power outages may result.

Information:
Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects such as garbage cans and
other objects that can easily blow around.

Wind Advisory  WIND ADVISORY   Wind Advisory
W. VALLEY

Areas Affected:
Central Oregon Coast Range Lowlands - West Central Willamette Valley - East Central Willamette Valley - Benton County Lowlands - Linn County Lowlands - Lane County Lowlands - Clackamas County Cascade Foothills - Cascade Foothills of Marion and Linn Counties
Effective: Thu, 12/18 1:04pm Updated: Thu, 12/18 3:45pm Urgency: Expected
Expires: Thu, 12/18 7:00pm Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...South winds 15 to 20 mph with gusts up to 45 mph expected.

* WHERE...Central and Southern Willamette Valley, Central Oregon
Coast Range Lowlands, Clackamas County Cascade Foothills, and
Cascade Foothills of Marion and Linn Counties.

* WHEN...Until 7 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects.
Saturated soils could result in downed trees, and tree limbs could
be blown down. Power outages may result.

Information:
Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects such as garbage cans and
other objects that can easily blow around.

Flood Watch  FLOOD WATCH   Flood Watch
W. VALLEY

Areas Affected:
Clatsop County Coast - Tillamook County Coast - Central Coast of Oregon - North Oregon Coast Range Lowlands - Central Oregon Coast Range Lowlands - North Oregon Coast Range - Central Oregon Coast Range - Lower Columbia River - Tualatin Valley - West Hills and Chehalem Mountains - Inner Portland Metro - East Portland Metro - Outer Southeast Portland Metro - West Central Willamette Valley - East Central Willamette Valley - Benton County Lowlands - Linn County Lowlands - Lane County Lowlands - West Columbia River Gorge of Oregon above 500 ft - West Columbia River Gorge I-84 Corridor - Upper Hood River Valley - Central Columbia River Gorge I-84 Corridor - Clackamas County Cascade Foothills - Cascade Foothills of Marion and Linn Counties - Lane County Cascade Foothills - North Oregon Cascades - Cascades of Marion and Linn Counties - Cascades of Lane County - South Washington Coast - Willapa and Wahkiakum Lowlands - Willapa Hills - Cowlitz County Lowlands - North Clark County Lowlands - Inner Vancouver Metro - East Clark County Lowlands - South Washington Cascade Foothills - West Columbia River Gorge - SR 14 - Central Columbia River Gorge - SR 14 - South Washington Cascades
Effective: Thu, 12/18 2:42am Updated: Thu, 12/18 3:45pm Urgency: Future
Expires: Thu, 12/18 7:00pm Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...Northwest Oregon and southwest Washington including the
following counties. In Oregon: Benton, Clackamas, Clatsop,
Columbia, Hood River, Lane, Linn, Lincoln, Marion, Multnomah,
Polk, Tillamook, Washington, and Yamhill. In Washington: Clark,
Cowlitz, Pacific, Skamania, and Wahkiakum.

* WHEN...Through Saturday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Storm drains
and ditches may become clogged with debris. Area creeks and
streams are running high and could flood with more heavy rain.
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.

* ADDITIONAL DETAILS...
- An atmospheric river is forecast to bring periods of heavy
rain to northwestern Oregon and southwestern Washington
today. This system occurs at a time when area rivers continue
to run high and soils remain saturated following heavy rain
earlier in the month. During initial heavy rainfall today,
the urban and small stream flooding threat will be most
urgent, although the details of precise timing and location
of the highest risk remains uncertain at this time. As runoff
works its way downstream, the river flooding threat will
increase tonight into Friday, with numerous area rivers now
forecast to reach at least Minor flood stage. Slower reacting
rivers may stay in flood stage into Saturday afternoon.
- http://www.weather.gov/safety/flood

Information:
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.