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Elev 43 ft, 49 °N, 122.27 °W

Sumas, WA Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Sumas, WA
Elevation: 43ft
Nearby Weather Stations

Active Weather Alerts

River Flood Warning
Issued: 5:22 AM Dec. 11, 2025 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL EARLY FRIDAY MORNING...

* WHAT...Minor flooding is occurring and moderate flooding is
forecast. This approaches the flood of record.

* WHERE...Nooksack River at North Cedarville.

* WHEN...Until early Friday morning.

* IMPACTS...At 148.0 feet, the Nooksack River will cause widespread
flooding downstream through Lynden...with swift waters covering
some farm lands and roads. Erosion may affect some river banks.

* ADDITIONAL DETAILS...
- At 8:15 PM PST Wednesday the stage was 147.8 feet.
- Flood stage is 146.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:15 PM PST Wednesday was 148.1 feet.
- Forecast...The river is expected to rise to a crest of 149.3
feet late tonight. It will then fall below flood stage
tomorrow afternoon.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 5:22 AM Dec. 11, 2025 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL SATURDAY MORNING...

* WHAT...Moderate flooding is forecast.

* WHERE...Nooksack River at Ferndale.

* WHEN...Until Saturday morning.

* IMPACTS...At 22.0 feet, the Nooksack River will overflow levees
and banks along the east bank of the river from Hovander Park
downstream to Marietta, causing widespread flooding from near
Ferndale downstream to the mouth...with swift waters in
residential areas and over farmlands and roads. Erosion may damage
some river banks. Flooding within the City of Ferndale affects
Main Street in the vicinity of the Whatcom Transportation
Authority Station.



* ADDITIONAL DETAILS...
- At 9:15 PM PST Wednesday the stage was 17.2 feet.
- Flood stage is 18.0 feet.
- Forecast...The river is expected to rise above flood stage
late this evening to a crest of 22.1 feet late tomorrow
evening. It will then fall below flood stage late Friday
evening.
- http://www.weather.gov/safety/flood

&&



River Flood Warning
Issued: 5:22 AM Dec. 11, 2025 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL LATE TOMORROW EVENING...

* WHAT...Major flooding is forecast.

* WHERE...South Fork Nooksack River at Saxon Bridge.

* WHEN...Until late tomorrow evening.

* IMPACTS...At 9.5 feet, the Nooksack River floodwaters will be
deep and swift...inundating farms, roads and residential areas
including the town of Acme.  Many roads will be impassable and
severe erosion may affect river banks. Flooding will occur all
along the river including headwaters...tributaries...and other
streams within and near the South Fork Nooksack River Basin.

* ADDITIONAL DETAILS...
- At 9:00 PM PST Wednesday the stage was 7.6 feet.
- Flood stage is 8.0 feet.
- Forecast...The river is expected to rise above flood stage
late this evening to a crest of 10.1 feet late tonight. It
will then fall below flood stage early tomorrow afternoon.
- http://www.weather.gov/safety/flood

&&



Flood Watch
Issued: 3:13 AM Dec. 11, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON...

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

* WHERE...Portions of northwest and west central Washington,
including the following counties, in northwest Washington,
Clallam, Grays Harbor, Island, Jefferson, Kitsap, Mason, San Juan,
Skagit and Whatcom. In west central Washington, King, Lewis,
Pierce, Snohomish and Thurston.

* WHEN...Through Friday 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.

* ADDITIONAL DETAILS...
- An atmospheric river will continue to impact the area through
much of the week and bring periods moderate to heavy rain to
the region. Sharp rises are occurring on area rivers,
especially those flowing off the Olympics and Cascades.

Urban and small stream flooding is possible for areas with
poor drainage.

Saturated soils will bring increased potential for landslides
and debris flows on burn scars.

- 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.

&&

Flood Warning
Issued: 1:26 AM Dec. 11, 2025 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM PST THURSDAY...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...A portion of northwest Washington, including the following
county, Whatcom.

* WHEN...Until 1015 AM PST Thursday.

* IMPACTS...Nooksack River overflow flooding at Everson is occurring
along an abandoned Nooksack River side channel, including Johnson
Creek, from Everson north toward Sumas and the Canadian border.

* ADDITIONAL DETAILS...
- At 523 PM PST, Stream gauge and river forecasts for the
Nooksack River at North Cedarville and at Everson indicate
that flooding has begun in Everson, at a sufficient level to
spill into an abandoned Nooksack River side channel,
including Johnson Creek; the split flow will send flood
waters flowing from Everson north toward Sumas.
- Some locations that will experience flooding include...
Sumas, Everson and Nooksack.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&



Flood Warning
Issued: 8:40 PM Dec. 10, 2025 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL 4 AM PST THURSDAY...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...In the foothill areas of northwest and west central
Washington, including the following counties, in northwest
Washington, Skagit and Whatcom. In west central Washington, King
and Snohomish.

* WHEN...Until 400 AM PST Thursday.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring. Numerous roads
remain closed due to flooding. Streams continue to rise due to
excess runoff from earlier rainfall.

* ADDITIONAL DETAILS...
- At 1237 PM PST, gauge reports indicated heavy rain. Flooding
is already occurring in the warned area. Between 1 and 3
inches of rain have fallen.
- Additional rainfall amounts of 4 to 6 inches are possible in
the warned area.
- Some locations that will experience flooding include...
Everett, Sedro-Woolley, North Bend, Gold Bar, Carnation,
Darrington, Concrete, Index, Stevens Pass, Snoqualmie Pass,
Deming, Sammamish, Monroe, Snoqualmie, Enumclaw, Duvall,
Sultan, Granite Falls, Skykomish and Rockport.
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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

&&



Special Weather Statement
Issued: 1:27 PM Dec. 10, 2025 – National Weather Service
...HEAVY RAINFALL THIS WEEK WILL LEAD TO AN INCREASED THREAT OF
LANDSLIDES IN WESTERN WASHINGTON...

Rainfall of up to 8 to 10 inches over the past several days has
increased antecedent soil moisture to high levels across western
Washington. Additional heavy rainfall of 1 to 4 inches across the
lowlands and 4 to 10 inches over the Olympics and Cascades is
expected through late Wednesday. Wet and unsettled conditions are
also favored to continue through the rest of the week. This amount of
rain will put extra pressure on soil instability, leading to an
increased threat of landslides and debris flows, especially from
recent burned areas.

A mudslide was reported along I-90 Monday evening near North Bend,
causing highway closures and extensive delays. More landslides are
possible.

Areas most susceptible to landslides debris flows under these
conditions are steep coastal bluffs, other steep hillsides or
road cuts, and recent burned areas. A diminishing threat of
landslides and debris flows will continue for several days after
the rain ends.

For more information about current conditions, visit
www.weather.gov/seattle, select Hydrology, and then scroll down
for the links to the landslide information pages.

For more information on landslides, visit the website for the
Washington State Department of Natural Resources landslide
geologic hazards at: http://bit.ly/2mtA3wn


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