Weather Alerts for Seattle and Vicinity

Issued by the National Weather Service

Avalanche Warning  AVALANCHE WARNING   Avalanche Warning
SEATTLE AND VICINITY

Areas Affected:
Cascades of Whatcom and Skagit Counties - Cascades of Snohomish and Northern King Counties
Effective: Tue, 3/17 7:30pm Updated: Wed, 3/18 2:21am Urgency: Unknown
Expires: Wed, 3/18 6:30pm Severity: Unknown Certainty: Unknown

 
Details:
AVWSEW

The following message is transmitted at the request of the
Northwest Avalanche Center.

...The Northwest Avalanche Center in Seattle has issued an
Avalanche Warning...

* WHAT...High avalanche danger is expected in the West Central zone
Tuesday night and Wednesday.

* WHERE...The West Central Zone is along the West Slopes of the
Cascades from SR20 to north of I-90. It includes the Mountain Loop
Highway and the mountains near and south of Hwy 2 along the West
Slopes of the Cascades. Dangerous avalanche conditions are
expected in neighboring zones.

* WHEN...In effect from Tue 18:30 PDT to Wed 18:30 PDT.

* IMPACTS...Large to very large natural wet snow avalanches are
expected. Avalanches that release from higher elevations could
run long distances to lower elevations or into terrain that is
usually considered safe.

* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions are expected. Travel in backcountry terrain is not
recommended. Put a large buffer between you and terrain where
avalanches can start, run, and stop.

Consult https://www.nwac.us/ or www.avalanche.org for more
detailed information.

Similar avalanche danger may exist at locations outside the
coverage area of this or any avalanche center.

D'Amico

Flood Warning  FLOOD WARNING   Flood Warning
SEATTLE AND VICINITY

Areas Affected:
King, WA
Effective: Tue, 3/17 9:50pm Updated: Wed, 3/18 2:21am Urgency: Expected
Expires: Wed, 3/18 6:00am Severity:  Severe  Certainty: Likely

 
Details:
...The National Weather Service in Seattle WA has issued a Flood
Warning for the following rivers in Washington...

Snoqualmie River Near Snoqualmie Falls affecting King County.

.Heavy rain over the Central Cascades combined with high snow levels
will push the Snoqualmie River neat Snoqualmie Falls above flood
stage Wednesday.

* WHAT...Minor flooding is forecast.

* WHERE...Snoqualmie River near Snoqualmie Falls.

* WHEN...From Wednesday morning to Thursday morning.

* IMPACTS...At 20,000.0 cfs, the Snoqualmie River will cause
widespread flooding of pasture lands and roads along the river
from the town of Snoqualmie downstream through Fall City. Roads
that may become flooded include Fall City-Carnation...Tolt Hill...
and Novelty Flats Roads. This river level on the Snoqualmie
corresponds roughly to a phase 3 flood in the King County flood
system.

* ADDITIONAL DETAILS...
- At 8:30 PM PDT Tuesday the flow was 12,200.0 cfs.
- Flood flow is 20,000.0 cfs.
- Forecast...The river is expected to reach flood stage around
7 AM Wednesday. The river will crest near 24,300 cfs
Wednesday afternoon. The river could recede below flood stage
Thursday then rise back above flood stage Friday.
- http://www.weather.gov/safety/flood

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

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

Additional information is available at www.weather.gov.

The next statement will be issued by Wednesday morning at 600 AM PDT.

Flood Warning  FLOOD WARNING   Flood Warning
SEATTLE AND VICINITY

Areas Affected:
King, WA
Effective: Tue, 3/17 9:45pm Updated: Wed, 3/18 2:21am Urgency: Expected
Expires: Wed, 3/18 5:45am Severity:  Severe  Certainty: Likely

 
Details:
...The National Weather Service in Seattle WA has issued a Flood
Warning for the following rivers in Washington...

Snoqualmie River Near Carnation affecting King County.

.Heavy rain in the Central Cascades combined with high snow levels
will push the Snoqualmie River at Carnation above flood stage
Wednesday.

* WHAT...Moderate flooding is forecast.

* WHERE...Snoqualmie River near Carnation.

* WHEN...From late tonight until further notice.

* IMPACTS...At 56.0 feet, the Snoqualmie River will cause widespread
flooding from Fall City downstream through Carnation and Duvall...
inundating much of the farm land and numerous roads.

* ADDITIONAL DETAILS...
- At 8:15 PM PDT Tuesday the stage was 51.1 feet.
- Flood stage is 54.0 feet.
- Forecast...The river will reach flood stage around 5 AM
Wednesday morning. The river will crest near 57.6 feet late
Wednesday night or early Thursday morning. The river will
remain above flood stage into the weekend.
- http://www.weather.gov/safety/flood

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

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

Additional information is available at www.weather.gov.

The next statement will be issued by late tonight at 545 AM PDT.

Flood Watch  FLOOD WATCH   Flood Watch
SEATTLE AND VICINITY

Areas Affected:
King, WA - Skagit, WA - Snohomish, WA - Whatcom, WA
Effective: Tue, 3/17 4:23pm Updated: Wed, 3/18 2:21am Urgency: Future
Expires: Wed, 3/18 7:00am Severity:  Severe  Certainty: Possible

 
Details:
* 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, Skagit
and Whatcom. In west central Washington, King and Snohomish.

* WHEN...From Wednesday afternoon through Friday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.

* ADDITIONAL DETAILS...
- High snow levels, heavy rainfall, and snowmelt runoff will
lead to rises on area rivers with flooding possible.
- 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.