* WHAT...Temperatures as low as 33 to 36 will result in frost
formation.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From 2 AM to 8 AM PDT Friday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
...The Flood Warning continues for the following rivers in Oregon...
Owyhee River Below Owyhee Dam affecting Malheur County.
.A combination of heavy rain and snow melt will result in increased
outflows from Owyhee Dam. Flows in rivers will increase quickly and
reach minor flood stage.
For the Owyhee River...including Owyhee Dam...Minor flooding is
forecast.
* WHAT...Minor flooding is forecast.
* WHERE...Owyhee River below Owyhee Dam.
* WHEN...Until early Wednesday afternoon.
* ADDITIONAL DETAILS...
- At 1:30 PM MDT Thursday /12:30 PM PDT Thursday/ the flow was
1,785.0 cfs.
- Bankfull is 1000 cfs.
- Forecast...The river is expected to rise above flood stage
late this afternoon to a crest of 5,000 cfs this evening.
- Flood flow is 3,000 cfs.
- Flood History...This crest compares to a previous crest of
5,110 cfs on 05/31/2019.
- http://www.weather.gov/safety/flood
...The National Weather Service in Boise ID has issued a Flood
Warning for the following rivers in Oregon...
Owyhee River Below Owyhee Dam affecting Malheur County.
For the Owyhee River...including Owyhee Dam, Owyhee Dam...Minor
flooding is forecast.
* WHAT...Minor flooding is forecast.
* WHERE...Owyhee River below Owyhee Dam.
* WHEN...From this afternoon until further notice.
* ADDITIONAL DETAILS...
- At 9:30 AM MDT Thursday /8:30 AM PDT Thursday/ the flow was
985.0 cfs.
- Bankfull is 1,000 cfs.
- Forecast...The river is expected to rise above flood stage
just after midnight tonight to a crest of 4,000 cfs tomorrow
morning. It will then fall below flood stage early Wednesday
morning.
- Flood flow is 3,000 cfs.
- Flood History...No available flood history.
- http://www.weather.gov/safety/flood
* WHAT...Heavy snow expected. Total snow accumulations of 10 to 20
inches.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From 5 PM this afternoon to 11 AM PDT Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
* WHAT...Snow expected. Total snow accumulations of up to 2
inches.
* WHERE...Central Oregon.
* WHEN...From 11 PM this evening to 4 PM PDT Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
* WHAT...Heavy snow possible. Total snow accumulations of 8 to
15 inches possible.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From Thursday afternoon through Saturday morning.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
* WHAT...Snow expected. Total snow accumulations of up to 3
inches.
* WHERE...Central Oregon.
* WHEN...From 11 PM this evening to 4 PM PDT Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
At 348 PM MDT, Doppler radar was tracking a strong thunderstorms
near Shell Rock Butte, west of Parma, moving northeast at 30 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This strong thunderstorm will be near...
Shell Rock Butte around 350 PM MDT.
Nyssa and Owyhee around 420 PM MDT.
At 241 PM PDT, Doppler radar was tracking a strong thunderstorm near
Knottingham Butte, or 39 miles southwest of Parma, moving northeast
at 25 mph.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could blow around unsecured objects. Minor
damage to outdoor objects is possible.
This strong thunderstorm will be near...
Northern Owyhee Reservoir around 400 PM MDT.
* WHAT...Heavy snow possible. Total snow accumulations of 8 to 15
inches possible.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From Thursday afternoon through Saturday morning.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
* WHAT...Snow expected. Total snow accumulations of up to 3
inches.
* WHERE...Central Oregon.
* WHEN...From 11 PM this evening to 4 PM PDT Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
* WHAT...Heavy snow possible. Total snow accumulations of up to
12 inches possible.
* WHERE...In Oregon, Northern Blue Mountains of Oregon. In
Washington, Northwest Blue Mountains.
* WHEN...From Thursday afternoon through Saturday morning.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the morning or evening
commute.
* WHAT...Snow expected. Total snow accumulations of up to two
inches.
* WHERE...Central Oregon.
* WHEN...From 11 PM this evening to 4 PM PDT Thursday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the morning commute.
At 859 PM PDT, Doppler radar was tracking a strong thunderstorm 12
miles northwest of Granite, or 31 miles west of North Powder, moving
northeast at 25 mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
This storm will remain over mainly rural areas of southwestern Union
and northeastern Grant Counties.
At 845 PM PDT, Doppler radar was tracking a strong thunderstorm 13
miles southwest of Rieth, or 15 miles southwest of Pendleton, moving
northeast at 30 mph.
HAZARD...Wind gusts up to 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Pendleton, Cayuse, Umatilla Reservation, Mission, and Rieth.
* WHAT...Visibility less than quarter of a mile in dense fog.
* WHERE...In Oregon, Clatsop County Coast, Tillamook County Coast,
and Central Coast of Oregon. In Washington, South Washington Coast.
* WHEN...Until 10 AM PDT this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
At 1124 AM PDT, Doppler radar was tracking a strong thunderstorm over
Keating, or 14 miles northeast of Baker City, moving east at 15 mph.
HAZARD...Wind gusts up to 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
This strong thunderstorm will be near...
Gover Reservoir around 1140 AM PDT.
* WHAT...Snow. Additional snow accumulations of 3 to 7 inches at
elevations above 5500 feet, with a measureable accumulation
possible down to 3500 feet. Southwest winds gusting as high as
35 mph.
* WHERE...South Central Oregon Cascades and Siskiyou Mountains
and Southern Oregon Cascades. This includes portions of
Highways 230, 138, and 62 around Crater Lake and Diamond Lake.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Plan on slippery road conditions.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Wet snow expected above 5500 feet. Additional snow
accumulations of 4 to 10 inches. Winds gusting as high as 45
mph.
* WHERE...South Central Oregon Cascades and Siskiyou Mountains
and Southern Oregon Cascades. This includes portions of
Highways 230, 138, and 62 around Crater Lake and Diamond Lake.
* WHEN...Until 11 PM PDT Thursday.
* IMPACTS...Plan on slippery road conditions.
* View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
At 534 PM PDT, a line of showers and embedded thunderstorms extended
from Sherwood back to near Dayton. This line is moving the northeast
at 30 mph, and will move across the southern part of the Portland
metro area through 615 pm.
HAZARD...Wind gusts up to 40 mph and pea size hail. A few hailstones
could reach the size of dimes.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Oregon City, Portland Downtown, Portland, Vancouver, Gresham,
Beaverton, Tigard, Lake Oswego, Tualatin, West Linn, Newberg,
Milwaukie, Wilsonville, Camas, Canby, Gladstone, Aurora, Maywood
Park, Rivergrove, and Oatfield.
This includes the following highways in Washington...
Interstate 205 near mile marker 27.
State Route 14 between mile markers 5 and 12.
This includes the following highways in Oregon...
Interstate 5 between mile markers 272 and 307.
Interstate 205 between mile markers 1 and 26.
Interstate 84 between mile markers 1 and 14.
U.S. Highway 26 west of Portland between mile markers 67 and 73.
U.S. Highway 26 east of Portland between mile markers 1 and 9.
U.S. Highway 30 west of Portland between mile markers 1 and 7.
