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Dense Fog Advisory


URGENT - WEATHER MESSAGE
National Weather Service Medford OR
228 PM PST Tue Dec 12 2017


ORZ023-131030-
/O.NEW.KMFR.FG.Y.0016.171213T0800Z-171213T1700Z/
/O.CON.KMFR.AS.Y.0005.000000T0000Z-171215T1800Z/
Central Douglas County-
Including the cities of Drain, Elkton, Roseburg, Sutherlin,
Green, Myrtle Creek, and Canyonville
228 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...
...DENSE FOG ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
WEDNESDAY...

The National Weather Service in Medford has issued a Dense Fog
Advisory...which is in effect from midnight tonight to 9 AM PST
Wednesday.

* Visibility: Less than one quarter mile.

* Locations include: Interstate 5 in the Umpqua Basin between
  Tri- City and Elkton.

* Impacts: Poor visibility, less than one quarter of a mile at
  times, will make travel difficult. The dense fog may become
  freezing fog in isolated areas and create slippery roads with
  additional travel difficulties.

* Air stagnation locations include: All inland valleys.

* Impacts: Limited ventilation will result in degraded air
  quality, which may pose a risk to those working outside and to
  those with sensitive health issues.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD


Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an airmass across the advisory area, pollution will increase.

* Slow down and allow for plenty of room between you and other
vehicles.

* Fog makes objects appear farther away than they are

* Use low beams. High beams reflect back thick fog, making
  visibility worse for you and other drivers.

* Don`t use cruise control. Most crashes occur because the
  driver is going too fast for weather conditions.

&&

$$


Freezing Fog Advisory


URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Portland OR
358 PM PST Tue Dec 12 2017

...STAGNANT AIR CONDITIONS EXPECTED INTO THURSDAY...

...FREEZING FOG EXPECTED TO DEVELOP OVERNIGHT IN THE SOUTHERN
WILLAMETTE VALLEY...

ORZ008-132015-
/O.NEW.KPQR.ZF.Y.0001.171213T1000Z-171213T2000Z/
/O.CON.KPQR.AS.Y.0002.000000T0000Z-171214T2200Z/
South Willamette Valley-
Including the cities of Eugene, Springfield, Corvallis, Albany,
and Lebanon
358 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST
THURSDAY...
...FREEZING FOG ADVISORY IN EFFECT FROM 2 AM TO NOON PST
WEDNESDAY...

The National Weather Service in Portland has issued a Freezing
Fog Advisory, which is in effect from 2 AM to noon PST Wednesday.

* FREEZING FOG ADVISORY...

* VISIBILITY...Dense freezing fog will likely develop overnight,
  resulting in visibility of one-quarter of a mile or less.

* FOG TIMING...Developing after midnight and continuing through
  late Wednesday morning.

* FREEZING FOG IMPACTS...Ice from fog may develop on area roads,
  creating slippery surfaces. Dense fog will limit visibility and
  enhance travel difficulties.

* AIR STAGNATION ADVISORY...

* AIR QUALITY...Air quality may deteriorate due to an extended
  period of stagnant air conditions.

* TIMING...through Thursday afternoon.

* LOCATIONS...the southern Willamette Valley.

* IMPACTS...Limited ventilation may result in deteriorating air
  quality continuing this week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Air Stagnation Advisory indicates that due to limited movement
of an air mass across the advisory area, pollution will increase
to dangerous levels. Persons with respiratory illness should
follow their physicians advice for dealing with high levels of
air pollution.

A Freezing Fog Advisory means visibilities will frequently be
reduced to one quarter mile or less. If driving, slow down, use
your headlights, and leave plenty of distance ahead of you. Also,
be alert for ice on surfaces causing slippery roads.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Medford OR
228 PM PST Tue Dec 12 2017


ORZ024-026-131030-
/O.NEW.KMFR.ZF.Y.0007.171213T0800Z-171213T1700Z/
/O.CON.KMFR.AS.Y.0005.000000T0000Z-171215T1800Z/
Eastern Curry County and Josephine County-Jackson County-
Including the cities of Grants Pass, Cave Junction, Medford,
and Ashland
228 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...
...FREEZING FOG ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PST WEDNESDAY...

The National Weather Service in Medford has issued a Freezing Fog
Advisory...which is in effect from midnight tonight to 9 AM PST
Wednesday.

* Visibility...about one quarter of a mile.

* Locations include...Rogue, Illinois, and Applegate Valley
  including Medford, Grants Pass, Talent, Phoenix, Cave
  Junction, Merlin and Selma.

* Impacts...Ice from fog may develop on area roads, making them
  very slippery. Additionally, poor visibility will make travel
  difficult.

* Air stagnation locations include: All inland valleys.

* Impacts: Limited ventilation will result in degraded air
  quality, which may pose a risk to those working outside and to
  those with sensitive health issues.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an airmass across the advisory area, pollution will increase.

* Slow down and allow for plenty of room between you and other
vehicles.

* Fog makes objects appear farther away than they are

* Use low beams. High beams reflect back thick fog, making
  visibility worse for you and other drivers.

* Don`t use cruise control. Most crashes occur because the driver
  is going too fast for weather conditions.

&&

$$


Beach Hazards Statement


Coastal Hazard Message
National Weather Service Eureka CA
215 PM PST Tue Dec 12 2017

CAZ101-103-104-109-130615-
/O.CON.KEKA.BH.S.0010.171213T1800Z-171215T0600Z/
Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
215 PM PST Tue Dec 12 2017

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM WEDNESDAY
MORNING THROUGH THURSDAY EVENING...

* TIMING...The highest sneaker wave risk will be Wednesday
  afternoon and evening, and then during the daytime on
  Thursday.

* IMPACTS...Larger surf at offshore breaks and an enhanced risk
  of sneaker waves on northwest California beaches. Steep
  beaches will have a higher risk of sneaker wave activity with
  greater wave run-up onto beaches. Large waves will also wash
  over jetties and rock outcroppings that may normally stay dry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BEACH HAZARDS STATEMENT IS ISSUED WHEN THREATS SUCH AS RIP
CURRENTS...LONGSHORE CURRENTS...SNEAKER WAVES AND OTHER HAZARDS
CREATE LIFE-THREATENING CONDITIONS IN THE SURF ZONE. CAUTION
SHOULD BE USED WHEN IN OR NEAR THE WATER. NEVER TURN YOUR BACK TO
THE OCEAN!

&&

$$


Air Stagnation Advisory


URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Portland OR
358 PM PST Tue Dec 12 2017

...STAGNANT AIR CONDITIONS EXPECTED INTO THURSDAY...

...FREEZING FOG EXPECTED TO DEVELOP OVERNIGHT IN THE SOUTHERN
WILLAMETTE VALLEY...

ORZ008-132015-
/O.NEW.KPQR.ZF.Y.0001.171213T1000Z-171213T2000Z/
/O.CON.KPQR.AS.Y.0002.000000T0000Z-171214T2200Z/
South Willamette Valley-
Including the cities of Eugene, Springfield, Corvallis, Albany,
and Lebanon
358 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST
THURSDAY...
...FREEZING FOG ADVISORY IN EFFECT FROM 2 AM TO NOON PST
WEDNESDAY...

The National Weather Service in Portland has issued a Freezing
Fog Advisory, which is in effect from 2 AM to noon PST Wednesday.

* FREEZING FOG ADVISORY...

* VISIBILITY...Dense freezing fog will likely develop overnight,
  resulting in visibility of one-quarter of a mile or less.

* FOG TIMING...Developing after midnight and continuing through
  late Wednesday morning.

* FREEZING FOG IMPACTS...Ice from fog may develop on area roads,
  creating slippery surfaces. Dense fog will limit visibility and
  enhance travel difficulties.

* AIR STAGNATION ADVISORY...

* AIR QUALITY...Air quality may deteriorate due to an extended
  period of stagnant air conditions.

* TIMING...through Thursday afternoon.

* LOCATIONS...the southern Willamette Valley.

* IMPACTS...Limited ventilation may result in deteriorating air
  quality continuing this week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Air Stagnation Advisory indicates that due to limited movement
of an air mass across the advisory area, pollution will increase
to dangerous levels. Persons with respiratory illness should
follow their physicians advice for dealing with high levels of
air pollution.

A Freezing Fog Advisory means visibilities will frequently be
reduced to one quarter mile or less. If driving, slow down, use
your headlights, and leave plenty of distance ahead of you. Also,
be alert for ice on surfaces causing slippery roads.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Medford OR
228 PM PST Tue Dec 12 2017


ORZ023-131030-
/O.NEW.KMFR.FG.Y.0016.171213T0800Z-171213T1700Z/
/O.CON.KMFR.AS.Y.0005.000000T0000Z-171215T1800Z/
Central Douglas County-
Including the cities of Drain, Elkton, Roseburg, Sutherlin,
Green, Myrtle Creek, and Canyonville
228 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...
...DENSE FOG ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST
WEDNESDAY...

The National Weather Service in Medford has issued a Dense Fog
Advisory...which is in effect from midnight tonight to 9 AM PST
Wednesday.

* Visibility: Less than one quarter mile.

* Locations include: Interstate 5 in the Umpqua Basin between
  Tri- City and Elkton.

* Impacts: Poor visibility, less than one quarter of a mile at
  times, will make travel difficult. The dense fog may become
  freezing fog in isolated areas and create slippery roads with
  additional travel difficulties.

* Air stagnation locations include: All inland valleys.

* Impacts: Limited ventilation will result in degraded air
  quality, which may pose a risk to those working outside and to
  those with sensitive health issues.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD


Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an airmass across the advisory area, pollution will increase.

* Slow down and allow for plenty of room between you and other
vehicles.

* Fog makes objects appear farther away than they are

* Use low beams. High beams reflect back thick fog, making
  visibility worse for you and other drivers.

* Don`t use cruise control. Most crashes occur because the
  driver is going too fast for weather conditions.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Medford OR
228 PM PST Tue Dec 12 2017


ORZ024-026-131030-
/O.NEW.KMFR.ZF.Y.0007.171213T0800Z-171213T1700Z/
/O.CON.KMFR.AS.Y.0005.000000T0000Z-171215T1800Z/
Eastern Curry County and Josephine County-Jackson County-
Including the cities of Grants Pass, Cave Junction, Medford,
and Ashland
228 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...
...FREEZING FOG ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PST WEDNESDAY...

The National Weather Service in Medford has issued a Freezing Fog
Advisory...which is in effect from midnight tonight to 9 AM PST
Wednesday.

* Visibility...about one quarter of a mile.

* Locations include...Rogue, Illinois, and Applegate Valley
  including Medford, Grants Pass, Talent, Phoenix, Cave
  Junction, Merlin and Selma.

* Impacts...Ice from fog may develop on area roads, making them
  very slippery. Additionally, poor visibility will make travel
  difficult.

* Air stagnation locations include: All inland valleys.

* Impacts: Limited ventilation will result in degraded air
  quality, which may pose a risk to those working outside and to
  those with sensitive health issues.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an airmass across the advisory area, pollution will increase.

* Slow down and allow for plenty of room between you and other
vehicles.

* Fog makes objects appear farther away than they are

* Use low beams. High beams reflect back thick fog, making
  visibility worse for you and other drivers.

* Don`t use cruise control. Most crashes occur because the driver
  is going too fast for weather conditions.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Medford OR
228 PM PST Tue Dec 12 2017


ORZ029>031-131030-
/O.CON.KMFR.AS.Y.0005.000000T0000Z-171215T1800Z/
Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Central and Eastern Lake County-
Including the cities of Altamont, Klamath Falls, Beatty, Bly,
Crescent, Gilchrist, Sprague River, Adel, and Lakeview
228 PM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...

* Air stagnation locations include: All inland valleys.

* Impacts: Limited ventilation will result in degraded air
  quality, which may pose a risk to those working outside and to
  those with sensitive health issues.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area, pollution will increase.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1147 AM PST Tue Dec 12 2017

...STAGNANT AIR CONDITIONS CONTINUE INTO FRIDAY...

...AREAS OF DENSE FREEZING FOG FOR THE FOOTHILLS OF THE SOUTHERN
BLUE MOUNTAINS AND PORTIONS OF NORTH CENTRAL AND CENTRAL OREGON
UNTIL NOON WEDNESDAY...

.An upper level ridge will persist over the Pacific Northwest.
This ridge will cause air movement to be limited over large
portions of the region. Areas of freezing fog will be possible
and the air quality will become unhealthy at times.

ORZ041-044-050-505-507-509-511-130700-
/O.CON.KPDT.AS.Y.0003.000000T0000Z-171215T1800Z/
East Columbia River Gorge-Lower Columbia Basin of Oregon-
Wallowa County-John Day Basin-
Foothills of the Northern Blue Mountains of Oregon-
East Slopes of the Oregon Cascades-Central Oregon-
including the cities of Arlington, The Dalles, Boardman,
Hermiston, Ione, Enterprise, Joseph, Wallowa, Dayville, John Day,
Mitchell, Monument, Spray, Pendleton, Pilot Rock, La Pine,
Sunriver, Bend, Madras, Prineville, and Redmond
1147 AM PST Tue Dec 12 2017

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...

* AIR QUALITY...Moderate to unhealthy at times.

* TIMING...Stagnant air to persist for several more days.

* IMPACTS...Persons with respiratory issues should follow the
  advice of their physician on how to deal with poor air
  quality. Also outdoor burning may be limited, so please
  consult with your local burn agencies.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Air Stagnation Advisory indicates that due to limited movement
of an air mass across the advisory area...pollution has the
potential to increase to dangerous levels. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.

During periods of stagnant air...state air quality agencies
highly recommend that no outdoor burning occur and that
residential wood burning devices be limited as much as possible.
According to state air quality agencies...prolonged periods of
stagnant air can hold pollutants close to the ground...where
people live and breathe. Check with your local burn agency for
any current restrictions in your area.

&&

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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