* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Air Stagnation Advisory, an extended
period of stagnant air, with light winds and little vertical
mixing. This is due to an inversion near the surface that will
continue to trap pollutants.
* WHERE...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...For the Dense Fog Advisory, until noon MST Tuesday. For the
Air Stagnation Advisory, until 2 PM MST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will continue to trap pollutants.
* WHERE...Portions of southwest and west central Idaho and northeast
and southeast Oregon.
* WHEN...Until 2 PM MST /1 PM PST/ Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or
less in dense fog. For the Air Stagnation Advisory, an extended
period of stagnant air, with light winds and little vertical
mixing. This is due to an inversion near the surface that will
continue to trap pollutants.
* WHERE...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...For the Dense Fog Advisory, until noon MST Tuesday. For the
Air Stagnation Advisory, until 2 PM MST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...The beaches and shorelines of Curry, Coos, and Douglas
counties.
* WHEN...From Monday evening through Tuesday afternoon.
* IMPACTS...Sneaker waves can run up significantly farther on
beaches than normal, including over rocks and jetties. These
waves can suddenly knock people off of their feet and quickly
pull them into the cold ocean waters, resulting in serious
injury or death. Waves may also lift driftwood logs, trapping
anyone caught underneath.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will continue to trap pollutants.
* WHERE...Portions of southwest and west central Idaho and northeast
and southeast Oregon.
* WHEN...Until 2 PM MST /1 PM PST/ Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Visibility has improved but patches of dense fog will
continue until early afternoon.
An extended period of stagnant air, with light winds and little
vertical mixing. This is due to an inversion near the surface that
will continue to trap pollutants.
* WHERE...Portions of southwest and west central Idaho and southeast
Oregon.
* WHEN...Until 2 PM MST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
Patchy dense freezing fog with near zero visibility has been
reported in the Columbia Basin this morning. Fog is particularly
dense along Interstate 90 around Ritzville, US-2 between Wilbur
and Coulee City, and WA-243 from Vantage to Desert Aire. 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.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...South Willamette Valley, and Central Oregon Coast Range
Lowlands.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...The beaches and shorelines of Curry, Coos, and Douglas
counties.
* WHEN...From Monday evening through Tuesday afternoon.
* IMPACTS...Sneaker waves can run up significantly farther on
beaches than normal, including over rocks and jetties. These
waves can suddenly knock people off of their feet and quickly
pull them into the cold ocean waters, resulting in serious
injury or death. Waves may also lift driftwood logs, trapping
anyone caught underneath.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will continue to trap pollutants.
* WHERE...In the valleys of southwest Idaho and southeast Oregon
below 4000 feet.
* WHEN...Until 2 PM MST /1 PM PST/ Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Air Stagnation Advisory, an extended period of
stagnant air, with light winds and little vertical mixing. This is
due to an inversion near the surface that will continue to trap
pollutants. For the Dense Fog Advisory, visibility less than one
quarter mile in dense fog.
* WHERE...Portions of southwest Idaho and southeast Oregon. This
includes Interstate 84 from Boise to Ontario and Highway 95 from
Weiser to Council.
* WHEN...For the Air Stagnation Advisory, until 2 PM MST Thursday.
For the Dense Fog Advisory, until 11 AM MST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...For the Air Stagnation Advisory, an extended period of
stagnant air, with light winds and little vertical mixing. This is
due to an inversion near the surface that will continue to trap
pollutants. For the Dense Fog Advisory, visibility less than one
quarter mile in dense fog.
* WHERE...Portions of southwest Idaho and southeast Oregon. This
includes Interstate 84 from Boise to Ontario and Highway 95 from
Weiser to Council.
* WHEN...For the Air Stagnation Advisory, until 2 PM MST Thursday.
For the Dense Fog Advisory, until 11 AM MST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Central Douglas County, Josephine County, and Jackson
County.
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Temperatures as low as 35 will result in frost formation.
* WHERE...South Central Oregon Coast. This includes Reedsport,
Lakeside, Coos Bay, Bandon, Langlois, Port Orford and surrounding
areas.
* WHEN...Until 8 AM PST this morning.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...The beaches and shorelines of Curry, Coos, and Douglas
counties.
* WHEN...From Monday evening through Tuesday afternoon.
* IMPACTS...Sneaker waves can run up significantly farther on
beaches than normal, including over rocks and jetties. These
waves can suddenly knock people off of their feet and quickly
pull them into the cold ocean waters, resulting in serious
injury or death. Waves may also lift driftwood logs, trapping
anyone caught underneath.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Temperatures as low as 34 will result in frost formation.
* WHERE...South Central Oregon Coast. This includes Reedsport,
Lakeside, Coos Bay, Bandon, Langlois, Port Orford and surrounding
areas.
* WHEN...From 3 AM to 8 AM PST Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Central and Southern Willamette Valley, North and Central
Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz
River Valleys, Tualatin Valley, Portland West Hills and Chehalem
Mountain, Inner Portland Metro, Willapa and Wahkiakum Lowlands,
North Clark County Lowlands, Inner Vancouver Metro, and South
Washington Cascade Foothills.
* WHEN...Until noon PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Areas of fog and dense fog is forming across
the south and central Willamette Valley this evening, where skies
have cleared. As clouds break up elsewhere, will see areas of fog
and dense fog form overnight.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...South Washington and North and Central Oregon Coast.
* WHEN...Until 9 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...As skies clear overnight, fog will be
forming. Expect areas of fog to be mainly in the lowlands along
rivers and near bays. As light east winds pick up Monday morning,
fog will thin and dissipate.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Central and Southern Willamette Valley, North and Central
Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz
River Valleys, Tualatin Valley, Portland West Hills and Chehalem
Mountain, Inner Portland Metro, Willapa and Wahkiakum Lowlands,
North Clark County Lowlands, Inner Vancouver Metro, and South
Washington Cascade Foothills.
* WHEN...Until noon PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Areas of fog and dense fog is forming across
the south and central Willamette Valley this evening, where skies
have cleared. As clouds break up elsewhere, will see areas of fog
and dense fog form overnight.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...South Washington and North and Central Oregon Coast.
* WHEN...Until 9 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...As skies clear overnight, fog will be
forming. Expect areas of fog to be mainly in the lowlands along
rivers and near bays. As light east winds pick up Monday morning,
fog will thin and dissipate.