* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Yakima Valley, Lower Columbia Basin of Washington, and
Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...South Willamette Valley, Foothills of the Northern and
Central Oregon Cascades, North and Central Coast Range Valleys of
Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin
Valley, Willapa and Wahkiakum Lowlands, North Clark County
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 PM PST Tuesday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and
Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Yakima Valley and Lower Columbia Basin of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Foothills of the Northern and Central Oregon Cascades,
North and Central Coast Range Valleys of Oregon, Lower Columbia
River and Cowlitz River Valleys, Central Willamette Valley,
Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark
County Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 PM PST Tuesday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and
Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro.
* WHEN...Until 4 PM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Visibility one quarter mile or less in freezing fog.
* WHERE...Yakima Valley and Lower Columbia Basin of Washington.
* WHEN...Until 10 AM PST Thursday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Multiple observations along I-82 between
Richland and Yakima are currently showing visibilities of less
than a quarter mile, which is expected to persist this evening and
into Thursday morning. Air Temperatures are currently 32-34 in the
area, but are anticipated to drop to between 25-30 degrees
overnight.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Foothills of the Northern and Central Oregon Cascades,
North and Central Coast Range Valleys of Oregon, Lower Columbia
River and Cowlitz River Valleys, Central Willamette Valley,
Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark
County Lowlands, and South Washington Cascade Foothills.
* WHEN...From 4 PM this afternoon to 4 PM PST Tuesday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...A persistent inversion with light and variable winds will
lead to a period of stagnant air conditions. This scenario could
result in the build up of air pollutants near the surface over
time.
* WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and
Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro.
* WHEN...From 4 PM this afternoon to 4 PM PST Monday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Yakima Valley.
* WHEN...Until 9 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
Patchy dense fog with visibility of a quarter mile or less has
been observed in the Kittitas Valley this morning. Be cautious
when traveling and be prepared for sudden changes of visibility.
Fog is expected to persist for the next couple of hours.
Patchy dense fog with visibility of a quarter mile or less have
been observed in Yakima this morning. Be cautious when traveling
and be prepared for sudden changes of visibility. Fog is expected
to persist for the next several hours.
* WHAT...Areas of fog, with visibility dropping to a quarter mile or
less in dense fog.
* WHERE...South Washington and North and Central Oregon Coast, North
and Central Coast Range Valleys of Oregon, Lower Columbia River
and Cowlitz River Valleys, Central Willamette Valley, Tualatin
Valley, Inner Portland Metro, Outer Southeast Portland Metro,
Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and
Inner Vancouver Metro.
* WHEN...Until 11 AM PST Tuesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Patchy dense fog with near zero visibility in places will
continue through the rest of the morning in the Moses Lake Area.
Fog is particularly dense along State Route 17 between Othello
and Moses Lake. Expect rapid changes in visibility in this area.
Use extra caution, reduce speeds, and allow extra travel time. Fog
is expected to lift this afternoon.
Patchy dense fog is expected through morning in the Yakima and
Kittitas valleys and limited areas of the lower Columbia Basin.
If traveling, be prepared for sudden changes in visibility.
...The Flood Warning continues for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
.Additional rainfall will keep the Skokomish River near minor flood
stage early Monday. The river will then slowly recede through the
day.
* WHAT...Minor flooding is forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...Until late this 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 3:30 AM PST Monday the stage was 16.5 feet.
- Flood stage is 16.5 feet.
- Forecast...The river is expected to remain near flood stage
early this morning, but then gradually fall below flood stage
through the morning.
- Flood History...This crest compares to a previous crest of
16.5 feet on 12/14/1995.
- http://www.weather.gov/safety/flood
...The Flood Warning continues for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
.Additional rainfall will keep the Skokomish River close to minor
flood stage into Monday.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...Until tomorrow 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 1:30 PM PST Sunday the stage was 16.6 feet.
- Flood stage is 16.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 1:30 PM PST Sunday was 16.7 feet.
- Forecast...The river is expected remain near 16.5 feet into
Monday before slowly receding Monday night.
- http://www.weather.gov/safety/flood
...The Flood Warning is extended for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
.Additional rainfall will keep the Skokomish River close to minor
flood stage through tomorrow.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...Until tomorrow 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 1:30 AM PST Sunday the stage was 16.6 feet.
- Flood stage is 16.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 1:30 AM PST Sunday was 16.8 feet.
- Forecast...The river is expected to rise to a crest of 16.6
feet late this morning. It will then fall below flood stage
tomorrow morning.
- Flood History...This crest compares to a previous crest of
16.5 feet on 01/07/2007.
- http://www.weather.gov/safety/flood
...The Flood Warning continues for the following rivers in
Washington...
Skokomish River At Potlatch affecting Mason County.
.Locally heavy rainfall over Olympics pushed the Skokomish River
slightly above flood stage Saturday morning.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Skokomish River at Potlatch.
* WHEN...Until tomorrow morning.
* 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 1:30 PM PST Saturday the stage was 16.7 feet.
- Flood stage is 16.5 feet.
- Recent Activity...The river crested around 16.8 feet around 9
AM Saturday.
- Forecast...The river is expected to fall below flood stage
late this evening but remain within a half a foot of flood
stage Until Monday evening.
- http://www.weather.gov/safety/flood
