* WHAT...Heavy snow expected. Total snow accumulations between 12
and 24 inches above 5000 feet, with up to 30 inches possible over
the highest peaks and ridgetops. Winds gusting as high as 50 mph.
* WHERE...The southern Oregon Cascades and Siskiyou Mountains. This
includes Highways 138 and 230 near Diamond Lake, Highway 62 near
Crater Lake, Highway 140 near Lake of the Woods and Highway 58 at
Willamette Pass and the Mt Ashland Ski Road up to the resort.
* WHEN...From 1 AM Friday to 10 AM PST Saturday.
* IMPACTS...Visibilities may drop below 1/4 mile due to falling and
blowing snow. The strong winds and weight of snow on tree limbs
may down power lines and could cause sporadic power outages.
* ADDITIONAL DETAILS...Snowfall rates from 10 am to 4 pm PST Friday
and from 10 pm Friday to 4 am PST Saturday could reach 1 inch per
hour at times.
* 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...Lake County and eastern Klamath County, South Central
Oregon Coast, Curry County Coast, Central Douglas County, Eastern
Curry County and Josephine County, Jackson County, and Klamath
Basin.
* WHEN...Until noon PST today.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Heavy snow possible. Total snow accumulations of 6 to 12
inches possible, heaviest above 4000-4500 feet. Winds could gust
as high as 40 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Significant snowfall with periods of heavy snowfall
rates will combine with low visibility to create very difficult
driving conditions.
* ADDITIONAL DETAILS...Snow levels will rise from around 4000 feet
Thursday night to around 5000 feet Friday afternoon. Snow levels
will then lower to around 3000 feet or less Friday night.
* 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...Lake County and eastern Klamath County, South Central
Oregon Coast, Curry County Coast, Central Douglas County, Eastern
Curry County and Josephine County, Jackson County, and Klamath
Basin.
* WHEN...Until noon PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Heavy snow possible above 3000 feet. Total snow
accumulations between 6 and 12 inches, and up to 15 inches above
5000 ft. Winds could gust as high as 40 mph.
* WHERE...South Washington Cascades and the Northern and Central
Cascades of Oregon.
* WHEN...From Thursday evening through Saturday afternoon.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* ADDITIONAL DETAILS...Snow levels will start around 4000-5000 ft
Thursday evening into Friday, before lowering to 3000-3500 ft
Friday night.
* 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 south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 5 AM MST /4 AM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* 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 south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 9 AM MST /8 AM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...Very cold temperatures as low as 24.
* WHERE...Central and Southern Willamette Valley, Tualatin Valley,
and North Clark County Lowlands.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* WHAT...Snow expected. Total snow accumulations between 12 and 24
inches above 5000 feet, with up to 30 inches possible over the
highest peaks and ridgetops. Winds gusting as high as 50 mph.
* WHERE...The southern Oregon Cascades and Siskiyou Mountains. This
includes Highways 138 and 230 near Diamond Lake, Highway 62 near
Crater Lake, and Highway 58 at Willamette Pass.
* WHEN...From 4 AM Friday to 10 PM PST Saturday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Friday morning and evening commutes as well as
weekend travel. Gusty winds could bring down tree branches as well
as cause areas of blowing snow and limited visibility.
* WHAT...For the Air Stagnation Advisory, a strong inversion and
stagnant air conditions near the surface will trap pollutants
possibly leading to poor air quality. For the Freeze Warning,
sub-freezing temperatures as low as 30 expected.
* WHERE...For the Air Stagnation Advisory, mainly areas inland from
the immediate coast. For the Freeze Warning this morning, mainly
the beaches from Port Orford to Reedsport, including North Bend
and Coos Bay.
* WHEN...For the Air Stagnation Advisory, until noon PST Thursday.
For the Freeze Warning, until 9 AM PST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Frost and freeze conditions could kill
crops, other sensitive vegetation and possibly damage unprotected
outdoor plumbing.
* WHAT...A strong inversion and stagnant air conditions near the
surface will trap pollutants possibly leading to poor air quality.
* WHERE...Valleys of Lake County and eastern Klamath County, Curry
County Coast, Central Douglas County, Eastern Curry County and
Josephine County, Jackson County, and Klamath Basin.
* WHEN...Until noon PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Air Stagnation Advisory, a strong inversion and
stagnant air conditions near the surface will trap pollutants
possibly leading to poor air quality. For the Freeze Warning,
sub-freezing temperatures as low as 30 expected.
* WHERE...For the Air Stagnation Advisory, mainly areas inland from
the immediate coast. For the Freeze Warning this morning, mainly
the beaches from Port Orford to Reedsport, including North Bend
and Coos Bay.
* WHEN...For the Air Stagnation Advisory, until noon PST Thursday.
For the Freeze Warning, until 9 AM PST this morning.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Frost and freeze conditions could kill
crops, other sensitive vegetation and possibly damage unprotected
outdoor plumbing.
* 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
Freeze Warning, sub-freezing temperatures as low as 29 expected.
* WHERE...For the Air Stagnation Advisory, mainly areas inland from
the immediate coast. For tonight's Freeze Warning, mainly the
beaches from Port Orford to Reedsport, including North Bend and
Coos Bay.
* WHEN...For the Air Stagnation Advisory, until noon PST Thursday.
For the Freeze Warning, from 2 AM to 9 AM PST Wednesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Frostbite and hypothermia could occur if
unprotected skin is exposed to these cold temperatures. Freeze
conditions could kill crops, other sensitive vegetation and
possibly damage unprotected outdoor plumbing.
* 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...Lake County and eastern Klamath County, Curry County
Coast, Central Douglas County, Eastern Curry County and Josephine
County, Jackson County, and Klamath Basin.
* WHEN...Until noon PST Thursday.
* IMPACTS...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
Freeze Warning, sub-freezing temperatures as low as 29 expected.
* WHERE...For the Air Stagnation Advisory, mainly areas inland from
the immediate coast. For tonight's Freeze Warning, mainly the
beaches from Port Orford to Reedsport, including North Bend and
Coos Bay.
* WHEN...For the Air Stagnation Advisory, until noon PST Thursday.
For the Freeze Warning, from 2 AM to 9 AM PST Wednesday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Frostbite and hypothermia could occur if
unprotected skin is exposed to these cold temperatures. Freeze
conditions could kill crops, other sensitive vegetation and
possibly damage unprotected outdoor plumbing.
* WHAT...Snow expected. Total snow accumulations between 12 and 24
inches above 5000 feet, with up to 30 inches possible over the
highest peaks and ridgetops. Winds gusting as high as 50 mph.
* WHERE...The southern Oregon Cascades and Siskiyou Mountains. This
includes Highways 138 and 230 near Diamond Lake, Highway 62 near
Crater Lake, and Highway 58 at Willamette Pass.
* WHEN...From 4 AM Friday to 10 PM PST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Friday morning and evening
commutes as well as weekend travel. Gusty winds could bring down
tree branches as well as areas of blowing snow.
* WHAT...Cold temperatures as low as 25 expected.
* WHERE...Central and Southern Willamette Valley, Tualatin Valley,
and North Clark County Lowlands.
* WHEN...From 10 PM this evening to 10 AM PST Wednesday.
* IMPACTS...Hypothermia can occur with prolonged exposure to these
temperatures.
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that can trap pollutants.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 9 AM MST /8 AM PST/ Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* 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...Portions of central, north central, and northeast Oregon
and central, south central, and southeast Washington.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
