* WHAT...Sub-freezing temperatures as low as 27 expected.
* WHERE...Grande Ronde Valley.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Areas of sub-freezing temperatures are
expected overnight into Monday morning in cold-prone locations of
the Grande Ronde Valley.
* WHAT...Sub-freezing temperatures as low as 27 expected.
* WHERE...Central Oregon.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Areas of sub-freezing temperatures are
expected overnight into Monday morning in cold-prone locations of
central Oregon.
* WHAT...Sub-freezing temperatures as low as 23 expected.
* WHERE...Wallowa County.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...Widespread sub-freezing temperatures are
expected overnight into Monday morning in cold-prone locations of
Wallowa Valley.
* WHAT...Sub-freezing temperatures as low as 28 expected.
* WHERE...Grande Ronde Valley and Wallowa County.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* WHAT...Sub-freezing temperatures as low as 28 expected.
* WHERE...Grande Ronde Valley and Wallowa County.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 8 PM this evening to 11 AM PDT
Tuesday.
* IMPACTS...Any fires that develop could spread rapidly.
* AFFECTED AREA...In California...Fire weather zone 280. In
Oregon, fire weather zone 618, 619, and 620.
* WIND...Tonight, 15 to 25 mph. Tomorrow afternoon 10 to 20 mph,
but increasing to 15 to 25 mph Monday night. Occasional gusts
around 30 to 40 mph will be possible through this stretch.
* HUMIDITY...Single digits to upper teens in the afternoon.
Recoveries only around 20 to 50 percent the next couple nights.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
...BREEZY WINDS AND LOW HUMIDITY TODAY...
.A dry cold front passage earlier this morning will result in
breezy winds developing and persisting through this evening. Very
dry air filtering into the region behind the cold front will
result in relative humidity quickly falling in many locations of
the Columbia Basin. As a result, this area will be susceptible to
rapid fire spread.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon and 691 Lower Columbia Basin.
* WINDS...West 15 to 25 mph with gusts up to 40 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Rapid fire spread may occur, particularly in dry
grassy areas.
* WHAT...Sub-freezing temperatures as low as 29 expected.
* WHERE...Grande Ronde Valley and Wallowa County.
* WHEN...From 11 PM this evening to 9 AM PDT Monday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
...BREEZY WINDS AND LOW HUMIDITY SUNDAY...
.Winds will increase on Sunday as a dry cold front sweeps across
eastern Washington and eastern Oregon. Very dry air will also
accompany the cold front, causing the relative humidity to
quickly fall in many locations of the Columbia Basin. As a
result, this area will be susceptible to rapid fire spread.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon and 691 Lower Columbia Basin of Washington.
* WINDS...West 20 to 30 mph with gusts up to 40 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Rapid fire spread may occur, particularly in dry
grassy areas.
...BREEZY WINDS AND LOW HUMIDITY SUNDAY...
.Winds will increase on Sunday as a dry cold front sweeps across
eastern Washington and eastern Oregon. Very dry air will also
accompany the cold front, causing the relative humidity to
quickly fall in many locations of the Columbia Basin. As a
result, this area will be susceptible to rapid fire spread.
The National Weather Service in Pendleton has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM to 7 PM PDT Sunday. The Fire Weather Watch is no
longer in effect.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon and 691 Lower Columbia Basin.
* WINDS...West 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Rapid fire spread may occur, particularly in dry
grassy areas.
* WHAT...Visibility of one quarter mile or less in dense fog.
* WHERE...Tillamook County Coast and Central Coast of Oregon.
* WHEN...Until noon PDT today.
* IMPACTS...Low visibility could make driving conditions hazardous.
...BREEZY WINDS AND LOW HUMIDITY SUNDAY...
.Winds will increase on Sunday as a dry cold front sweeps across
eastern Washington and eastern Oregon. Very dry air will also
accompany the cold front, causing the relative humidity to
quickly fall in many locations of the Columbia Basin. As a
result, this area will be susceptible to rapid fire spread.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon and 691 Lower Columbia Basin.
* WINDS...West 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Rapid fire spread may occur, particularly in dry
grassy areas.
...BREEZY WINDS AND LOW HUMIDITY SUNDAY...
.Winds will increase on Sunday as a dry cold front sweeps across
eastern Washington and eastern Oregon. Very dry air will also
accompany the cold front, causing the relative humidity to
quickly fall in many locations of the Columbia Basin. As a result,
this area will be susceptible to rapid fire spread.
The National Weather Service in Pendleton has issued a Fire
Weather Watch for wind and low relative humidity, which is in
effect from Sunday morning through Sunday evening.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon and 691 Lower Columbia Basin of Washington.
* WINDS...West 15 to 25 mph with gusts up to 35 mph.
* RELATIVE HUMIDITY...As low as 15 percent.
* IMPACTS...Rapid fire spread may occur, particularly in dry
grassy areas.
* WHAT...Visibility less than one quarter mile in dense fog.
* WHERE...In Oregon, East Central Willamette Valley, East Portland
Metro, Inner Portland Metro, Lower Columbia River, Outer Southeast
Portland Metro, Portland West Hills and Chehalem Mountain,
Tualatin Valley, West Central Willamette Valley, Benton County
Lowlands, Lane County Lowlands, and Linn County Lowlands. In
Washington, Cowlitz County Lowlands, East Clark County Lowlands,
Inner Vancouver Metro, and North Clark County Lowlands.
* WHEN...Until 11 AM PDT this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Wet conditions and cool overnight
temperatures are supporting patchy dense fog throughout the
Willamette Valley and could be present during the morning commute.
Fog should lift by mid to late morning.
* WHAT...West winds 15 to 25 mph with gusts up to 50 mph.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Foothills of the Southern Blue Mountains of Oregon, North Central
Oregon, Kittitas Valley, Yakima Valley, and Simcoe Highlands.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
* WHAT...Visibility between one-quarter and one mile in blowing dust.
* WHERE...Lower Columbia Basin of Oregon and Washington.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Hazardous driving conditions due to reduced visibility.
* WHAT...Visibility between one-quarter and one mile in blowing dust.
* WHERE...Grande Ronde Valley.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Hazardous driving conditions due to reduced visibility.
* WHAT...For the Blowing Dust Advisory, visibility between
one-quarter and one mile in blowing dust. For the Wind Advisory,
west winds 15 to 25 mph with gusts up to 50 mph.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Hazardous driving conditions due to reduced visibility.
Gusty winds will blow around unsecured objects. Tree limbs could
be blown down and a few power outages may result.
* WHAT...For the Blowing Dust Advisory, visibility between
one-quarter and one mile in blowing dust. For the Wind Advisory,
west winds 15 to 25 mph with gusts up to 50 mph.
* WHERE...In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.
* WHEN...Until 11 PM PDT this evening.
* IMPACTS...Hazardous driving conditions due to reduced visibility.
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 35 mph with gusts up to 55 mph.
* WHERE...Higher terrain in central and Eastern Lake County.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
