* WHAT...For the Freeze Warning, sub-freezing temperatures as low as
30 expected. For the Frost Advisory, temperatures as low as 33
will result in frost formation.
* WHERE...The Frost Advisory includes most areas of coastal Douglas
and Coos County. The Freeze Warning includes Coos Bay, North Bend,
Lakeside, Charleston, Bandon and portions of the inland Coquille
Valley.
* WHEN...Until 9 AM PST this morning.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...For the Freeze Warning, sub-freezing temperatures as low as
30 expected. For the Frost Advisory, temperatures as low as 33
will result in frost formation.
* WHERE...The Frost Advisory includes most areas of coastal Douglas
and Coos County. The Freeze Warning includes Coos Bay, North Bend,
Lakeside, Charleston, Bandon and portions of the inland Coquille
Valley.
* WHEN...Until 9 AM PST this morning.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...A high risk of sneaker waves is expected.
* WHERE...All beaches and shorelines of Douglas, Coos, and Curry
counties.
* WHEN...Until 1 PM PST this 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...For the Freezing Fog Advisory, visibility one quarter mile
or less in freezing fog. For the Air Stagnation Advisory, light
winds and limited air movement will lead to a period of stagnant
air conditions. This scenario could result in the build up of air
pollutants over time.
* WHERE...Central Willamette Valley, Benton County Lowlands, and
Linn County Lowlands.
* WHEN...For the Freezing Fog Advisory, until 9 AM PST this morning.
For the Air Stagnation Advisory, until 4 AM PST Thursday.
* IMPACTS...For the Freezing Fog Advisory, low visibility could make
driving conditions hazardous. For the Air Stagnation Advisory,
deteriorating air quality may cause issues for people with
respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants 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, Tualatin Valley, Lane County
Lowlands, Willapa and Wahkiakum Lowlands, North Clark County
Lowlands, and South Washington Cascade Foothills.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Portland Metro Hills, 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...For the Freezing Fog Advisory, visibility one quarter mile
or less in freezing fog. For the Air Stagnation Advisory, light
winds and limited air movement will lead to a period of stagnant
air conditions. This scenario could result in the build up of air
pollutants over time.
* WHERE...Central Willamette Valley, Benton County Lowlands, and
Linn County Lowlands.
* WHEN...For the Freezing Fog Advisory, until 9 AM PST this morning.
For the Air Stagnation Advisory, until 4 AM PST Thursday.
* IMPACTS...For the Freezing Fog Advisory, low visibility could make
driving conditions hazardous. For the Air Stagnation Advisory,
deteriorating air quality may cause issues for people with
respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Central and Southern 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 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Portland Metro Hills, 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...A ridge of high pressure will lead to a strong inversion
and stagnant air conditions near the surface that will continue to
trap pollutants. This could worsen air quality over time.
* WHERE...Valley locations across southern Oregon. West of the
Cascades, this includes the Umpqua, Illinois, Applegate, and Rogue
valleys. East of the Cascades, this includes Klamath Falls,
Sprague River, Chiloquin, Chemult, Silver Lake, Paisley, and
surrounding areas.
* WHEN...Until 4 PM PST Wednesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Freeze Warning, sub-freezing temperatures as low as
30 expected. For the Frost Advisory, temperatures as low as 34
will result in frost formation.
* WHERE...The Frost Advisory includes most areas of coastal Douglas
and Coos County. The Freeze Warning includes Coos Bay, North Bend
and portions of the inland Coquille Valley.
* WHEN...From 11 PM this evening to 9 AM PST Sunday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...For the Freeze Warning, sub-freezing temperatures as low as
30 expected. For the Frost Advisory, temperatures as low as 34
will result in frost formation.
* WHERE...The Frost Advisory includes most areas of coastal Douglas
and Coos County. The Freeze Warning includes Coos Bay, North Bend
and portions of the inland Coquille Valley.
* WHEN...From 11 PM this evening to 9 AM PST Sunday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that may trap air pollutants in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho, and northeast and southeast Oregon.
* WHEN...Until 9 PM MST /8 PM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants over time.
* WHERE...Central and Southern 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 AM PST Thursday.
* IMPACTS...Deteriorating air quality may cause issues for people
with respiratory problems.
* WHAT...Light winds and limited air movement will lead to a period
of stagnant air conditions. This scenario could result in the
build up of air pollutants 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 less than one quarter mile in freezing fog.
* WHERE...Foothills of the Northern Blue Mountains of Oregon.
* WHEN...Until 2 PM PST this afternoon.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile
or less in freezing fog. For the Air Stagnation Advisory, poor air
quality will continue. This is due to an inversion and stagnant
air conditions near the surface that will continue to trap
pollutants.
* WHERE...Klamath Basin. This includes Klamath Falls, Sprague River,
Merrill, Keno, Chiloquin and surrounding areas.
* WHEN...For the Freezing Fog Advisory, until noon PST today. For
the Air Stagnation Advisory, until 4 PM PST Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Watch for icy spots on roads. Poor air quality may cause issues
for people with respiratory problems.
* WHAT...For the Air Stagnation Advisory, poor air quality will
continue. This is due to an inversion and stagnant air conditions
near the surface that will continue to trap pollutants. For the
Dense Fog Advisory, visibility one quarter mile or less in dense
fog.
* WHERE...The Rogue, Applegate and Sams valleys in Jackson County,
including Medford, Talent, Phoenix, Eagle Point, Central Point,
Jacksonville, Applegate and Shady Cove.
* WHEN...For the Air Stagnation Advisory, until 4 PM PST Wednesday.
For the Dense Fog Advisory, until 11 AM PST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Low visibility could make driving conditions
hazardous.
* WHAT...Poor air quality will continue. This is due to an inversion
and stagnant air conditions near the surface that will continue to
trap pollutants.
* WHERE...Valleys in Lake County, eastern Klamath County, Central
Douglas County, Eastern Curry County and Josephine County. West
of the Cascades, this includes the Umpqua, Illinois, Applegate,
and Rogue valleys, including Grants Pass, Sunny Valley, Galice,
Murphy, Selma, Cave Junction and O'Brien. East of the Cascades,
this includes Chemult, Silver Lake, Paisley, Valley Falls and
surrounding areas.
* WHEN...Until 4 PM PST Wednesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile
or less in freezing fog. For the Air Stagnation Advisory, poor air
quality will continue. This is due to an inversion and stagnant
air conditions near the surface that will continue to trap
pollutants.
* WHERE...Klamath Basin. This includes Klamath Falls, Sprague River,
Merrill, Keno, Chiloquin and surrounding areas.
* WHEN...For the Freezing Fog Advisory, until noon PST today. For
the Air Stagnation Advisory, until 4 PM PST Wednesday.
* IMPACTS...Low visibility could make driving conditions hazardous.
Watch for icy spots on roads. Poor air quality may cause issues
for people with respiratory problems.
