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Portland, OR Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: Portland, OR
Elevation: 243ft
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Active Weather Alerts

Flood Watch
Issued: 10:42 AM Dec. 18, 2025 – National Weather Service
...FLOOD WATCH NOW IN EFFECT THROUGH SATURDAY AFTERNOON...

* 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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

Wind Advisory
Issued: 4:37 AM Dec. 18, 2025 – National Weather Service
...WIND ADVISORY REMAINS IN EFFECT FROM 8 AM TO 7 PM PST THURSDAY...

* 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...From 8 AM to 7 PM PST Thursday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

River Flood Warning
Issued: 12:53 AM Dec. 18, 2025 – National Weather Service
...FLOOD WARNING NOW IN EFFECT FROM THURSDAY AFTERNOON TO FRIDAY
AFTERNOON...

* WHAT...Major flooding is forecast. This approaches the flood of
record.

* WHERE...Johnson Creek at Sycamore.

* WHEN...From Thursday afternoon to Friday afternoon.

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

* ADDITIONAL DETAILS...
- At 1:30 PM PST Wednesday the stage was 5.2 feet.
- Bankfull stage is 10.0 feet.
- Forecast...The river will rise abruptly above flood stage
Thursday and crest late Thursday evening around 14.8 feet
before falling below flood stage early Friday morning.
- Flood stage is 11.0 feet.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 12:25 AM Dec. 18, 2025 – National Weather Service
...FLOOD WARNING IN EFFECT FROM THURSDAY EVENING TO FRIDAY
AFTERNOON...

* WHAT...Moderate flooding is forecast. The current river forecast
is about 6 inches shy of the January 2011 flood event.

* WHERE...Sandy River near Bull Run.

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

* IMPACTS...Above 21.5 feet, expect significant bank erosion, large
amounts of debris in the river, and flooding of low areas along
the river, especially in the lower reach of the Sandy near
Troutdale.

* ADDITIONAL DETAILS...
- At 3:45 PM PST Wednesday the stage was 13.0 feet.
- Bankfull stage is 18.0 feet.
- Forecast...The river will rise above flood stage Thursday
evening and crest around 21.2 feet early Friday morning. It
will fall below flood stage late Friday morning.
- Flood stage is 19.3 feet.
- http://www.weather.gov/safety/flood

&&



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