* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Central Douglas County, Eastern Curry County and Josephine
County, Eastern Douglas County Foothills, and Jackson County. This
includes the cities of Roseburg, Grants Pass, Cave Junction and
Medford.
* WHEN...From 10 AM Tuesday to noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
* 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...From 11 PM MST /10 PM PST/ this evening to 11 AM MST /10 AM
PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Visibility less than one mile in dense fog.
* WHERE...Foothills of the Blue Mountains of Washington.
* WHEN...Until 1 PM PST this afternoon.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility less than one mile in dense fog.
* WHERE...Foothills of the Blue Mountains of Oregon, and North
Central Oregon.
* WHEN...Until 1 PM PST this afternoon.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Alpowa Summit, Pomeroy
* WHEN...Until noon PST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
...The Flood Warning continues for the following rivers in Oregon...
Coquille River at Coquille affecting Coos County.
For the Coquille River...including Coquille...Minor flooding is
forecast.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Coquille River at Coquille.
* WHEN...Until late tonight.
* IMPACTS...At 23.0 feet, Some farm buildings may be threatened and
roads covered in low areas by rising water. Expect widespread
flooding throughout the Coquille River floodplain.
* ADDITIONAL DETAILS...
- At 4:45 AM PST Monday the stage was 22.0 feet.
- Bankfull stage is 20.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:45 AM PST Monday was 22.5 feet.
- Forecast...The river will continue to gradually fall today,
then go below flood stage late tonight.
- Flood stage is 21.0 feet.
- Flood History...This crest compares to a previous crest of
22.4 feet on 02/19/1983.
- http://www.weather.gov/safety/flood
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...Beaches along Curry, Coos, and Douglas Counties. The
highest risk will be at west-facing beaches.
* WHEN...Through Tuesday morning.
* 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...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Lake County and eastern Klamath County, and Klamath Basin.
This includes the cities of Klamath Falls and Lakeview.
* WHEN...From 10 AM Tuesday to noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Strong valley inversions will result in weak winds, poor
mixing and ventilation. This will result in stagnant air
conditions that will trap pollutants near the surface.
* WHERE...Central Douglas County, Eastern Curry County and Josephine
County, Eastern Douglas County Foothills, and Jackson County. This
includes the cities of Roseburg, Grants Pass, Cave Junction and
Medford.
* WHEN...From 10 AM Tuesday to noon PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* ADDITIONAL DETAILS...Mixing and ventilation should be better at
the south end of the Rogue Valley from around Talent to Ashland
due to stronger SE winds.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Pomeroy, Alpowa Summit, and Clarkston.
* WHEN...Until 8 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter to one half mile in freezing fog.
* WHERE...Kittitas Valley.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter to one half mile in dense fog.
* WHERE...Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility one quarter to one half mile in dense fog
* WHERE...Foothills of the Blue Mountains of Oregon, and North
Central Oregon.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility less than one mile in dense fog.
* WHERE...Foothills of the Blue Mountains of Washington.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Visibility less than one mile in freezing fog. Elevated
surfaces will become slick and hazardous.
* WHERE...Kittitas Valley.
* WHEN...Until 10 AM PST Monday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...Beaches along Curry, Coos, and Douglas Counties. The
highest risks will be to west-facing beaches.
* WHEN...From 4 AM PST Monday through Tuesday morning.
* 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
...The Flood Warning is extended for the following rivers in
Oregon...
Coquille River at Coquille affecting Coos County.
For the Coquille River...including Coquille...Minor flooding is
forecast.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Coquille River at Coquille.
* WHEN...Until late Tuesday morning.
* IMPACTS...At 23.0 feet, Some farm buildings may be threatened and
roads covered in low areas by rising water. Expect widespread
flooding throughout the Coquille River floodplain.
* ADDITIONAL DETAILS...
- At 3:45 PM PST Sunday the stage was 22.3 feet.
- Bankfull stage is 20.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 3:45 PM PST Sunday was 22.5 feet.
- Forecast...The river will oscillate above flood stage with a
maximum value of 22.4 feet late this afternoon. It will fall
below flood stage Tuesday morning.
- Flood stage is 21.0 feet.
- Flood History...This crest compares to a previous crest of
22.4 feet on 02/19/1983.
- http://www.weather.gov/safety/flood
* WHAT...A moderate risk of sneaker waves is expected.
* WHERE...Beaches along Curry, Coos, and Douglas Counties. The
highest risks will be to west-facing beaches.
* WHEN...From Monday morning 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...Wet snow and light ice expected. Total snow accumulations
up to one inch with ice accumulations to 0.02 inches.
* WHERE...Kittitas Valley.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.