* WHAT...Dangerously large breaking waves of 25 to 30 feet.
* WHERE...South Central Oregon Coast and Curry County Coast.
* WHEN...Until 7 AM PST Sunday.
* IMPACTS...Extremely large breaking waves will create very
hazardous conditions along beaches and area shorelines. Waves
will inundate beaches and surge into normally dry areas
especially during high tides. Infrastructure damage and
significant beach erosion can be expected.
* ADDITIONAL DETAILS...Surf conditions will be occasionally
worsened by high winds and seas as fronts pass each day through
Sunday.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Wet snow expected above 4500 feet. Total snow accumulations
3 to 6 inches.
* WHERE...Ochoco-John Day Highlands.
* WHEN...From 1 AM Friday to 4 AM PST Saturday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...Wet snow expected above 4500 feet. Total snow accumulations
6 to 12 inches.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From 1 AM Friday to 4 AM PST Saturday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions.
* WHAT...Wet snow above 4500 feet. Snow accumulations 5 to 9 inches.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 7 PM PST Friday.
* IMPACTS...Periods of moderate and heavy snow will combine with low
visibilities to create difficult driving conditions. Gusty winds
could bring down tree branches.
* ADDITIONAL DETAILS...Rising snow levels over late tonight into
early morning could lead to a period of rain and snow mix or rain
before returning to snow tomorrow when snow levels drop and
conditions cool. This may also lead to icy conditions tomorrow.
* WHAT...Snow expected above 4000 feet. From 4000 feet to 5000 feet,
total snow accumulations appear most likely to range between 3 and
12 inches, with the lowest amounts near 4000 feet. Above 5000-5500
feet, total snow accumulations of 12 to 18 inches.
* WHERE...South Washington Cascades and the Northern and Central
Cascades of Oregon.
* WHEN...Until 7 PM PST Friday.
* IMPACTS...Travel could be difficult at times. Be prepared for snow
covered roads and slick surfaces.
* ADDITIONAL DETAILS...An active storm track will continue to
produce accumulating snow across the passes in the Cascades into
this weekend. However, there are two time periods when snow levels
appear likely to rise to 5000-5500 feet and be far enough above
the passes to temporarily limit snow accumulations. The first
window where snow levels will rise above the passes appears most
likely to occur between 3 AM Friday and 9 AM Friday. Another round
of warmer air aloft will most likely push snow levels above the
passes Friday night as well.
* WHAT...Snow expected. Total snow accumulations between 12 to 20
inches, with up to 30 inches near Crater Lake and Mount Shasta Ski
area. Winds gusting as high as 70 mph.
* WHERE...The southern Oregon Cascades north of Highway 140
including Crater Lake National Park, highways 62, 138, and 51 at
Willamette Pass. Marble Mountains including Sawyer Bar Road near
Mount Etna, and the pass at Snowmans Hill Summit.
* WHEN...Until 10 AM PST Friday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact this evening and the Thursday
morning commutes. Very strong winds could cause extensive damage
to trees and power lines.
* WHAT...Snow. Total snow accumulations between 3 to 8 inches with
higher amounts of 8 to 14 inches above 5000 feet elevation. Winds
gusting as high as 35 mph in the valleys and 60 mph over the
mountains.
* WHERE...Northern and Eastern Klamath County and Western Lake
County County. This includes portions of Highway 97 north of
Chiloquin and Highway 140 between Dairy and Lakeview.
* WHEN...Until 4 AM PST Friday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Thursday evening commute. Strong winds could
cause extensive damage to trees and power lines.
* ADDITIONAL DETAILS...Snow levels will fluctuate between 4000 and
5000 feet. Periods of moderate snow are likely tonight and
Thursday morning and again Thursday evening through early Friday
morning.
ESFPQR
A series of systems will continue the wet weather pattern of late
across northwest Oregon through the weekend. This will lead to rises
on rivers and creeks through at least Sunday, December 29th. There
is currently a 30-50% probability that several rivers in northwest
Oregon including the Siuslaw River, the Mohawk River, the Marys
Rivers, the Luckiamute River and the Pudding River will reach minor
flood stage over the next week.
Heavy rainfall may also lead to ponding of water, general lowland
flooding and localized urban flooding, especially in low lying areas
or other areas with poor drainage. Heavy rainfall will also increase
the potential for landslides and debris flows in areas of steep
terrain.
The exact track of these upcoming storms will influence rainfall
amounts, and thus the potential for flooding. There is a 10% chance
that the southern Willamette Valley receives 2-3" of rain and the
adjacent higher terrain of the Coast Range and Cascades receive 3-5"
of rain late Saturday into early Sunday. This scenario would likely
produce more widespread flooding issues. Shifts in storm track
can change the current outlook, so be sure to monitor
weather.gov/portland for the latest weather updates, as well as any
watches, warnings, or advisories that may be issued. To view the
latest river forecasts, visit water.noaa.gov/wfo/pqr.
* WHAT...Large waves and hazardous surf conditions. Breakers up to
25 to 30 feet.
* WHERE...North and Central Coast of Oregon, and South
Washington Coast.
* WHEN...Until 4 PM PST Friday.
* IMPACTS...Destructive waves may wash over beaches, jetties,
and other structures unexpectedly. People can be swept off
rocks and jetties and drown while observing high surf. Minor
beach erosion may damage coastal properties and buildings.
Higher than normal water run-up is expected on beaches and low-
lying shoreline.
* ADDITIONAL DETAILS...Sneaker waves may be possible at times.
* WHAT...Southwest winds 30 to 40 mph with gusts of 50 to 70 mph
possible.
* WHERE...Lake County and eastern Klamath County, Central Siskiyou
County, Northeast Siskiyou and Northwest Modoc Counties, Modoc
County, Curry County Coast, Central Douglas County, Eastern Curry
County and Josephine County, and Jackson County.
* WHEN...From 10 PM this evening to 10 AM PST Friday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
The following message is transmitted at the request of the
Wallowa Avalanche Center.
...The Wallowa Avalanche Center in La Grande OR has issued a
BACKCOUNTRY AVALANCHE WARNING...
* WHAT...Dangerous avalanche conditions exist today in the winter
recreation areas out of Halfway, Oregon. Rapid snow loading
combined with strong wind will create conditions likely to
produce natural and human avalanches.
* WHERE...The Southern Wallowas, primarily riding areas near and
around Cornucopia, Norway Basin, Fish Lake, and Clear Creek Snopark.
* WHEN...in effect from Thu 07:00AM PST until Fri 07:00AM PST.
* IMPACTS...Recent heavy snow combined with wind will likely
create widespread areas of unstable snow.
The following message is transmitted at the request of the
Wallowa Avalanche Center.
...The Wallowa Avalanche Center in La Grande OR has issued a
BACKCOUNTRY AVALANCHE WARNING...
* WHAT...Dangerous avalanche conditions exist today in the winter
recreation areas out of Halfway, Oregon. Rapid snow loading
combined with strong wind will create conditions likely to
produce natural and human avalanches.
* WHERE...The Southern Wallowas, primarily riding areas near and
around Cornucopia, Norway Basin, Fish Lake, and Clear Creek .
* WHEN...in effect from Thu 07:00AM PST until Fri 07:00AM PST.
* IMPACTS...Recent heavy snow combined wtih wind will likely
create widespread areas of unstable snow.
* WHAT...Heavy wet snow above 4000 feet. Additional snow
accumulations up to 6 inches. Winds gusting as high as 45 mph with
blowing snow.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...Travel could be difficult due to periods of moderate to
heavy snow. Widespread blowing snow could significantly reduce
visibility. Gusty winds could bring down tree branches.
* WHAT...Snow above 4500 feet. Additional snow accumulations up to
one inch. Winds gusting as high as 35 mph.
* WHERE...Ochoco-John Day Highlands.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Even light snowfall amounts can accumulate on roads and
cause dangerous driving conditions due to slippery and
snow-covered roads.
* WHAT...Snow. Additional snow accumulations up to two inches. Winds
gusting as high as 45 mph.
* WHERE...Southern Blue Mountains of Oregon.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Plan on slippery road conditions. Gusty winds could
bring down tree branches.
* WHAT...Snow above 4000 feet. Additional snow accumulations up to
two inches. Winds gusting as high as 45 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions. Gusty winds could bring down tree branches.
* WHAT...Southwest winds 15 to 25 mph with gusts up to 45 mph.
* WHERE...Central Oregon and North Central Oregon.
* WHEN...Until 3 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...Southwest winds 20 to 30 mph with gusts up to 50 mph.
* WHERE...Foothills of the Southern Blue Mountains of Oregon.
* WHEN...Until 3 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...Southwest winds 20 to 30 mph with gusts up to 50 mph for the
base of the northern Blue Mountains of Oregon and Washington.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...Until 3 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...Southwest winds 35 to 50 mph with gusts up to 65 mph
expected.
* WHERE...This includes the Summer Lake area and Highway 31, the
mountains across Lake County and eastern Klamath County, and Modoc
County.
* WHEN...Until 10 AM PST this morning.
* IMPACTS...Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.
