* WHAT...Significant coastal flooding expected. Inundation of
around 2.5 feet above ground level is possible along
shorelines and low-lying coastal areas.
* WHERE...North Coast and Central Coast zones.
* WHEN...From 9 AM to 4 PM PST Sunday.
* IMPACTS...Coastal flooding due to tidal overflow is expected
around high tide. This may lead to flooding of parking lots,
parks, and roads, with road closures expected.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...San Juan County zone.
* WHEN...From 4 AM to 10 AM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...Western Whatcom County, Southwest Interior, Western
Skagit County, Everett and Vicinity, Tacoma Area, Admiralty
Inlet Area, Hood Canal Area, Seattle and Vicinity and
Bremerton and Vicinity zones.
* WHEN...From 4 AM to 10 AM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
Colder air moving into the area behind a cold front will lower snow
levels in the Cascades to near 2000 feet Sunday morning. Snow levels
remaining near 2000 feet into Monday morning.
* WHAT...Heavy snow expected at or above elevations greater than
2000 ft. Total snow accumulations between 6 and 18 inches.
Heaviest accumulations likely near Stevens Pass with a convergence
zone.
* WHERE...West Slopes North Cascades and Passes, West Slopes North
Central Cascades and Passes, and West Slopes South Central
Cascades and Passes.
* WHEN...From 5 AM Sunday to 10 AM PST Monday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Travel could be very difficult.
...WINTER WEATHER HIGHLIGHTS...
.An upper level trough will push a warm front across the region
overnight followed by a cold frontal passage late Sunday. Snow
levels will start out low and then rise overnight through Sunday
before lowering again late Sunday. This will produce some initial
mountain snow tonight, with some freezing rain also possible, before
turning to rain then returning to snow late Sunday through Monday.
* WHAT...Heavy mixed precipitation Above 4000 ft. Additional snow
accumulations between 8 and 11 inches...and ice accumulations
around one tenth of an inch tonight through Sunday morning. Total
snow accumulations 3 to 6 inches below 4000 feet. Winds gusting as
high as 40 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 10 PM PST Monday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
...WINTER WEATHER HIGHLIGHTS...
.An upper level trough will push a warm front across the region
overnight followed by a cold frontal passage late Sunday. Snow
levels will start out low and then rise overnight through Sunday
before lowering again late Sunday. This will produce some initial
mountain snow tonight, with some freezing rain also possible, before
turning to rain then returning to snow late Sunday through Monday.
* WHAT...Heavy mixed precipitation above 2500 ft. Additional snow
accumulations around 10 inches at pass level and up to 15 inches
over the higher mountains. Ice accumulations around a light glaze
tonight. Winds gusting as high as 35 mph.
* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.
* WHEN...Until 10 PM PST Monday.
* IMPACTS...Significant snowfall with periods of heavy snowfall
rates will combine with low visibility to create very difficult
driving conditions.
* WHAT...Heavy snow expected. Total snow accumulations of 12 to 24
inches above 4000 feet and 1 to 6 inches in the valleys.
* WHERE...Twisp, Holden Village, Conconully, Stehekin, Stevens Pass,
Mazama, Winthrop, Loup Loup Pass, and Methow.
* WHEN...Until 10 PM PST Monday.
* IMPACTS...Travel could be very difficult over mountain passes.
* ADDITIONAL DETAILS...Snow will briefly transition to rain over
Stevens Pass Sunday morning before changing back to snow Sunday
afternoon. Slushy conditions are possible where rain occurs.
* WHAT...Snow expected. Total snow accumulations of 3 to 8 inches
above 2500 feet with 1 to 4 inches below 2500 feet.
* WHERE...Plain, Leavenworth, and Blewett Pass.
* WHEN...Until 10 PM PST Sunday.
* IMPACTS...Travel could be difficult.
* ADDITIONAL DETAILS...Most of the expected accumulations will occur
this evening before snow levels rise.
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest Washington, including the following
county, Mason.
* WHEN...Through Sunday morning.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.
* ADDITIONAL DETAILS...
- Two to three and half inches of rain is forecast for the
Olympics Mountains through late Sunday afternoon. With the
Skokomish River running high this amount of precipitation
will likely push the river over flood stage late tonight or
Sunday morning.
- http://www.weather.gov/safety/flood
ESFPQR
It is shaping up to be a wet week ahead. Of particular concern is the
potential for heavy rain Tuesday night through Friday morning, which
could result in some flooding for area creeks and rivers.
Current projections of the most likely amounts for storm total
precipitation range from 5 to 8 inches for the Coast, Coast Range,
and Cascades, with 2.5 to 4 inches for inland valley locations,
including Portland, Salem, and Eugene. Upper end projections, with
about a 10 percent chance of occurring, range from 6 to 11 inches
for the Coast, Coast Range, and Cascades, with 5 to 7 inches for
inland valleys. Snowmelt in the Cascades from 2000 to 4000 feet
elevation could add runoff, although the main cause for flooding
would be the heavy rain.
Rivers will rise starting Wednesday. Small streams and
fast-responding rivers could see flooding as early as Wednesday
night or Thursday, with slow-responding rivers potentially flooding
by this weekend. Heavy rainfall will also cause water ponding in low
lying areas and other areas of poor drainage.
Monitor weather.gov/portland for the latest updates and any watches,
warnings, or advisories that may be issued for this event.
Heavy snow in the Cascades at or above 2000 feet Sunday morning
through Monday morning.
* WHAT...Heavy snow expected at or above elevations greater than
2000 ft. Total snow accumulations between 6 and 18 inches.
Heaviest accumulations likely near Stevens Pass with a convergence
zone.
* WHERE...West Slopes North Cascades and Passes, West Slopes North
Central Cascades and Passes, and West Slopes South Central
Cascades and Passes.
* WHEN...From 5 AM Sunday to 10 AM PST Monday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Travel could be very difficult
to impossible.
* ADDITIONAL DETAILS...The heaviest snowfall will occur Sunday once
snow levels drop below pass level.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...Eastern Strait of Juan de Fuca and Western Strait of
Juan De Fuca zones.
* WHEN...For the first Coastal Flood Advisory, until 5 PM PST
this afternoon. For the second Coastal Flood Advisory, from 10
AM to 5 PM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
* WHAT...Significant coastal flooding expected. Inundation of
around 2.5 feet above ground level is possible along shorelines
and low-lying coastal areas.
* WHERE...North Coast and Central Coast zones.
* WHEN...From 9 AM to 4 PM PST Sunday.
* IMPACTS...Coastal flooding due to tidal overflow is expected
around high tide. This may lead to flooding of parking lots,
parks, and roads, with road closures expected.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...Western Whatcom County, Southwest Interior, Western
Skagit County, Everett and Vicinity, Tacoma Area, Admiralty
Inlet Area, Hood Canal Area, Seattle and Vicinity and
Bremerton and Vicinity zones.
* WHEN...From 4 AM to 10 AM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...San Juan County zone.
* WHEN...From 4 AM to 10 AM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
* WHAT...Minor coastal flooding expected. Inundation of around 2
feet above ground level is possible along shorelines and low-
lying coastal areas.
* WHERE...Eastern Strait of Juan de Fuca and Western Strait of
Juan De Fuca zones.
* WHEN...For the first Coastal Flood Advisory, until 5 PM PST
this afternoon. For the second Coastal Flood Advisory, from 10
AM to 5 PM PST Sunday.
* IMPACTS...Minor coastal flooding due to tidal overflow is
expected around high tide. This may lead to flooding of
parking lots, parks, and roads, with only isolated road
closures expected.
* WHAT...For the Beach Hazards Statement, Sneaker waves
possible. For the Coastal Flood Advisory, tidal overflow
flooding expected.
* WHERE...Clatsop and Tillamook Coast, and South Washington
Coast.
* WHEN...For the Beach Hazards Statement, from Sunday morning
through Sunday evening. For the Coastal Flood Advisory, from
11 AM to 3 PM PST Sunday.
* IMPACTS...Minor flooding, up to one foot above ground level,
during high tides is expected in the low lying areas near bays,
sloughs, Highway 101, and the lower reaches of the coastal
rivers.
* WHAT...For the Beach Hazards Statement, Sneaker waves
possible. For the Coastal Flood Advisory, tidal overflow
flooding expected.
* WHERE...Clatsop and Tillamook Coast, and South Washington
Coast.
* WHEN...For the Beach Hazards Statement, from Sunday morning
through Sunday evening. For the Coastal Flood Advisory, from
11 AM to 3 PM PST Sunday.
* IMPACTS...Minor flooding, up to one foot above ground level,
during high tides is expected in the low lying areas near bays,
sloughs, Highway 101, and the lower reaches of the coastal
rivers.
...The National Weather Service in Seattle WA has issued a Flood
Warning for the following rivers in Washington...
Skokomish River At Potlatch affecting Mason County.
.Heavy rainfall in the Olympics will force sharp rises on the
Skokomish River tonight into Sunday.
* WHAT...Minor flooding is forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...From late tonight to Monday afternoon.
* IMPACTS...At 16.5 feet, the Skokomish River will cause widespread
flooding of pasture lands, with water flowing quickly over West
Bourgault Road and Skokomish Valley Road.
* ADDITIONAL DETAILS...
- At 2:30 PM PST Saturday the stage was 15.6 feet.
- Flood stage is 16.5 feet.
- Forecast...The river will rise above flood stage just after
midnight tonight to 17.4 feet late tomorrow morning. It will
then fall below flood stage late Monday morning to 15.9 feet
late Tuesday evening. It will rise above flood stage again
early Wednesday morning to 17.6 feet Wednesday afternoon. It
will then fall again but remain above flood stage.
- Flood History...This crest compares to a previous crest of
17.6 feet on 10/20/2003.
- http://www.weather.gov/safety/flood
