* WHAT...Snow. Additional snow accumulations between 10 and 20
inches above 4500 feet with 6 to 10 inches expected along the I-84
corridor.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Periods of moderate and heavy snow will cause low
visibilities to create difficult driving conditions.
* WHAT...Visibility one quarter mile or less in dense fog.
* WHERE...Portions of northern California and south central and
southwest Oregon, especially valleys and low lying areas.
* WHEN...Until 1 PM PST Sunday.
* IMPACTS...Low visibility could make driving conditions hazardous.
* WHAT...Snow. Additional snow accumulations between 6 and 10 inches.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 PM PST Sunday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...Snow expected. Total snow accumulations of 5 to 10 inches.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 PM PST Sunday.
* IMPACTS...Significant snowfall with periods of heavy snowfall
rates will combine with low visibility to create very difficult
driving conditions.
* WHAT...Sneaker waves possible on the beaches.
* WHERE...North and Central Coast of Oregon, and South
Washington Coast.
* WHEN...From late tonight through Sunday evening.
* IMPACTS...Waves can run up significantly farther on a beach than
normal, including over rocks and jetties. Sneaker waves can
suddenly knock people off of their feet and quickly pull them
into the frigid ocean which may lead to serious injury or
drowning.
* WHAT...Mixed precipitation expected. Total snow accumulation up to
one inch along with a thin glaze of ice.
* WHERE...Lower Treasure Valley Zones, and Malheur County.
* WHEN...From 7 PM MST /6 PM PST/ to 11 PM MST /10 PM PST/ this
evening.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions.
* WHAT...Snow expected above 3000 feet. Total snow accumulations 6
to 10 inches. Winds gusting as high as 40 mph.
* WHERE...In Oregon, North Oregon Cascades. In Washington, South
Washington Cascades.
* WHEN...Until 4 PM PST Sunday.
* IMPACTS...Travel could be very difficult.
* ADDITIONAL DETAILS...Snow levels will lower to 3000 feet tonight
with the period of heaviest snowfall expected to occur late
tonight through Sunday morning.
* 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...South winds 30 to 35 mph with gusts around 45 mph for the
southern Grande Ronde Valley near Ladd and Pyles Canyons.
* WHERE...Grande Ronde Valley.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Fog has decreased and visibility has improved.
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 in valleys.
* WHERE...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...Until 5 PM MST this afternoon.
* 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 in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 5 PM MST /4 PM PST/ this afternoon.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
A thin layer of below freezing temperatures is trapped in the
Hood River Valley this morning as light rainfall begins to
increase across the region. Patchy freezing rain has been reported
by the cites of Parkdale, Glenwood, and Odell. Temperatures will
be slow to warm heading into the midday hours allowing light
freezing rain to continue until 1200-1300 PST. Light ice
accumulations of 0.02-0.06 inches this morning may impact travel
and make surfaces slick. Slippery road conditions are difficult to
see and can catch driver off guard, increasing the risk of car
accidents; use caution.
* 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 in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 5 PM MST /4 PM PST/ this afternoon.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
* WHAT...For the Air Stagnation Advisory in valleys, 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 mile in dense fog.
* WHERE...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...For the Air Stagnation Advisory, until 5 PM MST this
afternoon. 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 in valleys, 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 mile in dense fog.
* WHERE...Lower Treasure Valley Zones, and Upper Weiser River.
* WHEN...For the Air Stagnation Advisory, until 5 PM MST this
afternoon. 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...Snow expected. Total snow accumulations of 5 to 9 inches.
Winds gusting as high as 40 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From 4 PM this afternoon to 4 PM PST Sunday.
* IMPACTS...Periods of moderate and heavy snow will cause low
visibilities to create difficult driving conditions.
* WHAT...South winds 25 to 35 mph with gusts 45 to 50 mph expected
for Ladd and Pyles Canyons.
* WHERE...Grande Ronde Valley.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Visibility 1/2 mile or less in freezing fog.
* WHERE...Foothills of the Northern Blue Mountains of Oregon.
* WHEN...Until 11 AM PST this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Areas of dense fog, especially along
Interstate 84 around Pendleton, could make for hazardous driving
conditions. Additionally, below freezing temperatures may create
slick spots on roadways.
* WHAT...Visibility less than a quarter mile in freezing fog.
* WHERE...North Central Oregon.
* WHEN...Until 11 AM PST this morning.
* IMPACTS...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 in valleys.
* WHERE...Portions of south central, southwest, and west central
Idaho and northeast and southeast Oregon.
* WHEN...Until 5 PM MST /4 PM PST/ this afternoon.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
