* WHAT...South winds 25 to 35 mph with gusts between 40 and 55 mph
expected.
* WHERE...Grande Ronde Valley.
* WHEN...From 4 PM this afternoon to 7 AM PST Sunday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* ADDITIONAL DETAILS...Strongest winds will be through the Ladd and
Pyles canyons.
ESFPQR
An series of frontal systems will bring heavy rainfall to northwest
Oregon and southwest Washington through Monday. Heavier rain will
begin with the arrival of a front this afternoon, and intensify
tonight into Sunday. After a brief lull in precipitation late Sunday,
another strong system will bring additional moderate to heavy
rainfall on Monday. This will lead to rises on rivers and creeks,
especially for rivers draining the Willapa Hills and Oregon Coast
Range through Monday. Main stem rivers may be delayed to respond, and
flooding may occur beyond this time frame.
There is around a 20-30% chance of the Wilson River, the Grays River,
and other localized quick responding coastal rivers of reaching minor
flood stage by late Sunday or early Monday. More widespread river
flooding is not expected, but increases in forecast precipitation
amounts could lead to additional rises on area rivers if heavier
rainfall stalls over the area for a longer period of time.
Heavy rainfall along the Cascades combined with snowmelt will lead to
an enhanced risk of landslides.
Heavy rainfall may also lead to ponding of water and localized urban
flooding, especially in low-lying areas or other poor-drainage areas.
Heavy rainfall will also increase the potential for landslides in
areas of steep terrain. The probability of debris flows is currently
low as rainfall rates are not expected to meet thresholds over areas
that have been burned by wildfires over the past few years.
Shifts in the forecast storm track can change the outlook and
probabilities for river flooding, 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...Southwest winds 35 to 45 mph with gusts up to 60 mph
possible.
* WHERE...Portions of Lake, Klamath, and Modoc counties, including
Summer Lake, Wagontire, Valley Falls, Paisley, the Warner and Hart
Mountains, Winter Rim, and portions of Highways 395, 140, and 31.
* WHEN...From Monday morning through late Monday night.
* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.
* WHAT...South winds 35 to 45 mph with gusts up to 65 mph possible.
* WHERE...The Curry, Coos, and Douglas county coasts, including
Brookings, Gold Beach, Port Orford, Bandon, North Bend, Coos Bay,
Reedsport, all capes and headlands, and exposed portions of
Highway 101.
* WHEN...From Monday morning through Monday evening.
* IMPACTS...Damaging winds could blow down trees and power lines,
and damage unsecured property. Power outages are possible. Travel
could be difficult, especially for high profile vehicles.
ESFPDT
Synopsis: Rain and high mountain snow from and multiple systems this
weekend and early next week will lead to rising water levels on area
streams and rivers. Rainfall amounts of 2 to 5 inches are expected
in the Cascades and 1 to 3 inches in the eastern Oregon mountains.
In addition, temperatures will be rising to the 40s and lower 50s in
the mountains which will lead to snow melt adding even more water to
area rivers and streams. The National Water Model is highlighting
high water on numerous smaller streams and creeks, but streamflow
amounts are generally only slightly higher than high water
thresholds.
What: Precipitation fed by an atmospheric river and snow melt due to
warmer temperatures this weekend into early next week will lead to
rises on area creeks, streams and rivers. Rivers are low enough so
that most rivers will remain below bankfull. However, the Walla
Walla River at Touchet and the Naches River at Cliffdell are
expected to exceed bankfull late Sunday night before receding Monday
and Tuesday. Another concern will be rapid rises on smaller streams
and creeks due to heavier downpours and snowmelt. This could lead to
debris flows on recent burn scars and over steep terrain.
The Walla Walla River at Touchet has a 44 percent chance of
exceeding bankfull but less than a 5 percent chance of reaching
minor flood stage. It is expected to reach bankfull late Sunday
evening and remain there through Tuesday morning.
The Naches River at Cliffdell has a 29 percent chance of exceeding
bankfull but less than a 5 percent chance of reaching minor flood
stage. It is expected to reach bankfull late Sunday evening and
remain there until dropping below bankfull Monday afternoon.
The Klickitat River at Pitt is forecast remain below bankfull, but
model probabilities give it a 13 percent chance of rising above
bankfull and a 9 percent chance of reaching minor flood stage. All
other river forecast points have a less than a 10 percent chance of
exceeding bankfull.
When: Rain will begin tonight and continue through Monday with the
heaviest rain expected Saturday night and Sunday.
Where: The Upper and Lower East Slopes of the Washington and Oregon
Cascades, The Simcoe Highlands, The Northern and Southern Blue
Mountains, The Blue Mountain Foothills of Washington and Oregon,
Wallowa County and the Grande Ronde Valley.
This Hydrologic Outlook will be updated as needed due to changing
conditions.
ESFPQR
An series of frontal systems will bring heavy rainfall to northwest
Oregon and southwest Washington this weekend. Rain will begin
Saturday afternoon, and intensify overnight through Sunday. This will
lead to rises on rivers and creeks, especially along the coast on
February 22nd through the 23rd. Main stem rivers may be delayed to
respond, and flooding may occur beyond this time frame.
There is around a 20-25% chance of the Wilson River, the Grays River,
and other localized quick responding coastal rivers of reaching minor
flood stage on Sunday. Confidence in flooding is low as the location
of heaviest precipitation will greatly depend on where the warm front
sets up. In the case that this system over performs, more widespread
flooding is possible.
Heavy rainfall along the Cascades is expected and combined with
recent snow accumulation, there is elevated landslide risk.
Heavy rainfall may also lead to ponding of water, general lowland
flooding, and localized urban flooding, especially in low-lying areas
or other poor-drainage areas. Heavy rainfall will also increase the
potential for landslides in areas of steep terrain and debris flows
over areas that have been burned by wildfires over the past few
years.
Shifts in the forecast storm track can change the outlook and
probabilities for river flooding, 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.
ESFPDT
What: The precipitation and snow melt will lead to rises on area
creeks, streams and rivers. Rivers are low enough that only the
Naches River at Cliffdell is expected to exceed bankfull early
Monday for a few hours and only by a few inches. However, with the
heavier periods of rain and snow melt, rapid rises will be possible
on smaller streams and creeks as well. Further rises on streams and
creeks will be a concern through the weekend into early next week.
When: Rain will be ending tonight though more systems will bring
rain Friday night through Monday.
Where: The Upper and Lower East Slopes of the Washington and Oregon
Cascades, The Simcoe Highlands, The Northern and Southern Blue
Mountains, The Blue Mountain Foothills of Washington and Oregon,
Wallowa County and the Grande Ronde Valley.
Synopsis: Rain and high mountain snow in the last 24 hours and
multiple systems this weekend and early next week will lead to
rising water levels on area streams and rivers. Rainfall amounts of
2 to 4 inches are expected in the Cascades and 1 to 2 inches in the
eastern Oregon mountains. In addition, temperatures will be rising
to the 40s and even lower 50s in the mountains which will lead to
snow melt adding even more water to rivers and streams. At this
point, the Naches River at Cliffdell is expected to barely reach
action stage for several hours early Monday before receding. Other
rivers in the Cascades and eastern Oregon mountains are forecast to
approach but stay below action stage. Rises will also be possible on
smaller streams and creeks.
This Hydrologic Outlook will be updated as needed due to changing
conditions.
ESFPQR
An series of frontal systems will bring heavy rainfall to northwest
Oregon and southwest Washington this weekend. Rain will begin
Saturday afternoon, and intensify overnight through Sunday. This
will lead to rises on rivers and creeks, especially along the coast
on February 22nd through the 23rd. Main stem rivers may be delayed
to respond, and flooding may occur beyond this time frame.
There is around a 25% chance of the Wilson River, the Grays River,
and other localized quick responding coastal rivers of reaching
minor flood stage on Sunday. Confidence in flooding is low as the
location of heaviest precipitation will greatly depend on where the
warm front sets up. In the case that this system over performs, more
widespread flooding is possible.
Along the Cascades heavy rainfall is expected. Heavy rain combined
with recent snow will elevate the landslide risk.
Heavy rainfall may also lead to ponding of water, general lowland
flooding, and localized urban flooding, especially in low-lying
areas or other poor-drainage areas. Heavy rainfall will also
increase the potential for landslides in areas of steep terrain and
debris flows over areas that have been burned by wildfires over the
past few years.
Shifts in the forecast storm track can change the outlook and
probabilities for river flooding, 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...Snow. Additional snow accumulations up to 3 inches. Winds
gusting as high as 35 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions.
ESFPDT
Synopsis: Rain and high mountain snow in the last 24 hours and
multiple systems this weekend and early next week will lead to
rising water levels on area streams and rivers. Rainfall amounts of
2 to 4 inches are expected in the Cascades and 1 to 2 inches in the
eastern Oregon mountains. In addition, temperatures will be rising
to the 40s and even lower 50s in the mountains which will lead to
snow melt adding even more water to rivers and streams. At this
point, the Naches River at Cliffdell is expected to barely reach
action stage for several hours early Monday before receding. Other
rivers in the Cascades and eastern Oregon mountains are forecast to
approach but stay below action stage. Rises will also be possible on
smaller streams and creeks.
Where: The Upper and Lower East Slopes of the Washington and Oregon
Cascades, The Simcoe Highlands, The Northern and Southern Blue
Mountains, The Blue Mountain Foothills of Washington and Oregon,
Wallowa County and the Grande Ronde Valley.
When: Rain will be ending tonight though more systems will bring
rain Friday night through Monday.
What: The precipitation and snow melt will lead to rises on area
creeks, streams and rivers. Rivers are low enough that only the
Naches River at Cliffdell is expected to exceed bankfull early
Monday for a few hours and only by a few inches. However, with the
heavier periods of rain and snow melt, rapid rises will be possible
on smaller streams and creeks as well. The Morrow County Sheriff's
Office reported earlier today that the Upper Hinton Creek near
Heppner is out of its banks in a few places though any flooding is
minor and not a problem at this point. However, further rises on
streams and creeks will be a concern through the weekend into early
next week.
This Hydrologic Outlook will be updated as needed due to changing
conditions.
...CONTINUED SNOW OVER THE CASCADES...
.Showery conditions remain behind a frontal band that has produced
widespread snow over the Cascades today. Snow will begin to lighten
with areas of rain through the day as the main front shifts
eastward, then transition back to snow overnight.
* WHAT...Snow Above 4000 feet. Additional snow accumulations up to 3
inches.
* WHERE...Northern and Central Oregon Cascades.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* ADDITIONAL DETAILS...Snow will be showery so accumulation amounts
will vary based on location and elevation. For elevations between
4000 to 5000 feet, rain may be the dominate precipitation type and
thus accumulation will be less. As temperatures cool overnight,
rain will transition back to snow.
* WHAT...Snow. Additional snow accumulations up to 5 inches. Winds
gusting as high as 35 mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Snow expected. Additional snow accumulations between 5 to
10 inches. Winds gusting as high as 40 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Periods of moderate and heavy
snow will combine with low visibilities to create difficult
driving conditions.
* WHAT...Snow. Additional snow accumulations up to 6 inches and ice
accumulations around a light glaze.. Winds gusting as high as 35
mph.
* WHERE...East Slopes of the Oregon Cascades.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Snow expected. Additional snow accumulations between 5 to
10 inches. Winds gusting as high as 40 mph.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...Until 4 AM PST Thursday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Periods of moderate and heavy
snow will combine with low visibilities to create difficult
driving conditions.
* WHAT...Mixed precipitation. Additional snow accumulations up to
one inch and ice accumulations around a light glaze.
* WHERE...In Oregon, Foothills of the Southern Blue Mountains of
Oregon and North Central Oregon. In Washington, Simcoe Highlands.
* WHEN...Until noon PST today.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Mixed precipitation. Additional snow accumulations up to
one inch and ice accumulations around a light glaze.
* WHERE...Lower Columbia Basin of Oregon and Washington, Foothills
of the Northern Blue Mountains of Oregon, Yakima Valley, and
Foothills of the Blue Mountains of Washington.
* WHEN...Until noon PST today.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* WHAT...Mixed precipitation including snow, freezing rain, and
sleet in sheltered valleys. Ice accumulations around 0.05 to 0.10
in the Lower Treasure Valley. Snow accumulations around 1 to 3
inches this morning along the I-84 corridor in Baker County,
Weiser Basin, and northern Malheur County.
* WHERE...Portions of southwest and west central Idaho and northeast
and southeast Oregon.
* WHEN...Until 2 PM MST /1 PM PST/ this afternoon.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions.
Below freezing temperatures and light rain will result in a glaze
of ice on surfaces this morning. Roads, and especially bridges
and overpasses, may become slick and hazardous. Be aware that
walking surfaces may be slick. Walk with extra care. Temperatures
will rise above freezing and allow conditions to improve around
mid morning.
* WHAT...Heavy snow expected. Total snow accumulations between 4 and
9 inches. Winds gusting as high as 45 mph.
* WHERE...The southern Oregon Cascades and Siskiyou Mountains.
* WHEN...Until 4 PM PST this afternoon.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Wednesday morning commute. Gusty winds could
bring down tree branches.
