Weather Alerts for PDX Metro

Issued by the National Weather Service

Flood Warning  FLOOD WARNING   Flood Warning
PDX METRO

Areas Affected:
Clackamas, OR - Marion, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 4:01pm 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
PDX METRO

Areas Affected:
Clackamas, OR - Multnomah, OR
Effective: Thu, 12/18 3:47pm Updated: Thu, 12/18 4:01pm Urgency: Expected
Expires: Fri, 12/19 4:00am Severity:  Severe  Certainty: Likely

 
Details:
...Forecast flooding changed from Moderate to Major severity and
increased in duration for the following rivers in Oregon...

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River near Oregon City affecting Clackamas County.

* WHAT...Major flooding is forecast.

* WHERE...Johnson Creek at Sycamore.

* WHEN...Until early tomorrow afternoon.

* IMPACTS...Above 14.0 feet, expect widespread flooding of
residential and commercial areas along Johnson Creek.

* ADDITIONAL DETAILS...
- At 3:30 PM PST Thursday the stage was 8.9 feet.
- Bankfull stage is 10.0 feet.
- Forecast...The river will rise above flood stage late this
afternoon or early this evening and crest around 14.3 feet
late this evening. It will then fall below flood stage Friday
morning.
- Flood stage is 11.0 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 late tonight at 400 AM PST.

Flood Warning  FLOOD WARNING   Flood Warning
PDX METRO

Areas Affected:
Clackamas, OR - Multnomah, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 4:01pm 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...Sandy River near Bull Run.

* WHEN...From this evening to early Friday afternoon.

* IMPACTS...Above 19.3 feet, expect areas of significant bank
erosion and some minor flooding of low areas along the Sandy from
Ten Eyck Road Bridge, also called Revenue Bridge downstream to
Troutdale.

* ADDITIONAL DETAILS...
- At 9:45 AM PST Thursday the stage was 12.3 feet.
- Bankfull stage is 18.0 feet.
- Forecast...The river will rise above flood stage late this
evening and crest around 20.3 feet late tonight. It will then
fall below flood stage Friday morning.
- Flood stage is 19.3 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
PDX METRO

Areas Affected:
Clackamas, OR
Effective: Thu, 12/18 3:47pm Updated: Thu, 12/18 4:01pm Urgency: Expected
Expires: Fri, 12/19 4:00am Severity:  Severe  Certainty: Likely

 
Details:
...Forecast flooding changed from Moderate to Major severity and
increased in duration for the following rivers in Oregon...

Johnson Creek at Sycamore affecting Multnomah and Clackamas
Counties.

Clackamas River near Oregon City affecting Clackamas County.

* WHAT...Major flooding is forecast.

* WHERE...Clackamas River near Oregon City.

* WHEN...From this evening to early Saturday morning.

* IMPACTS...Above 46.0 feet, expect major flooding of some
residences and buildings along the lower Clackamas River,
including the mobile home park just downstream of Carver Bridge.

* ADDITIONAL DETAILS...
- At 3:00 PM PST Thursday the stage was 29.3 feet.
- Bankfull stage is 38.0 feet.
- Forecast...The river will rise above flood stage late this
evening and crest around 46.0 feet late tonight. It will then
fall below flood stage late Friday.
- Flood stage is 39.0 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 late tonight at 400 AM PST.

Flood Warning  FLOOD WARNING   Flood Warning
PDX METRO

Areas Affected:
Clackamas, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 4:01pm 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...Major flooding is forecast.

* WHERE...Clackamas River at Estacada.

* WHEN...From this evening to Saturday morning.

* IMPACTS...Above 25.0 feet, expect major flood damage at parks
along the river. Also expect flooding in Carver, along with
numerous homes along the Clackamas River from Estacada downstream
to the confluence with the Willamette.

* ADDITIONAL DETAILS...
- At 9:45 AM PST Thursday the stage was 14.6 feet.
- Bankfull stage is 18.0 feet.
- Forecast...The river will rise above flood stage this evening
and crest around 25.3 feet late tonight. It will then fall
below flood stage Saturday morning.
- Flood stage is 20.0 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
PDX METRO

Areas Affected:
Clackamas, OR
Effective: Thu, 12/18 10:30am Updated: Thu, 12/18 4:01pm 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...Molalla River near Canby.

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

* IMPACTS...Above 23.0 feet, expect flooding of low-lying
agricultural land from Canby downstream to the confluence with the
Pudding River. Some secondary roads and a few structures may begin
to flood.

* ADDITIONAL DETAILS...
- At 9:00 AM PST Thursday the stage was 14.4 feet.
- Bankfull stage is 20.0 feet.
- Forecast...The river will rise above flood stage tonight and
crest around 23.1 feet late tonight. It will then fall below
flood stage early Friday.
- Flood stage is 23.0 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
PDX METRO

Areas Affected:
North Oregon Cascades - Cascades of Marion and Linn Counties - South Washington Cascades
Effective: Thu, 12/18 1:58pm Updated: Thu, 12/18 4:01pm 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

Flood Advisory  FLOOD ADVISORY   Flood Advisory
PDX METRO

Areas Affected:
Clatsop, OR - Tillamook, OR - Washington, OR
Effective: Thu, 12/18 1:36pm Updated: Thu, 12/18 4:01pm Urgency: Expected
Expires: Thu, 12/18 7:30pm Severity: Minor Certainty: Likely

 
Details:
* WHAT...Small stream flooding caused by excessive rainfall is
expected.

* WHERE...A portion of northwest Oregon, including the following
counties, Clatsop, Tillamook and Washington.

* WHEN...Until 730 PM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways. Some low-water crossings may become
impassable. River or stream flows are elevated.

* ADDITIONAL DETAILS...
- At 136 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause small stream flooding.
Rapid river rises will cause minor flooding in the advisory
area. Between 1 and 2 inches of rain have fallen.
- Additional rainfall amounts of 2 to 4 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Cannon Beach, Garibaldi, Manzanita, Tillamook, Rockaway
Beach, Lees Camp, Trask, Elsie, Cape Meares, Netarts,
Oceanside, Bay City, Wheeler, Nehalem, Foss, Salmonberry,
Hamlet, Mohler, Wilson River Summit and Sunset Summit.
- 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.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
PDX METRO

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 4:01pm 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
PDX METRO

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 4:01pm 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
PDX METRO

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 4:01pm 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
PDX METRO

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 4:01pm 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.