* WHAT...Temperatures as low as 32 will result in frost formation.
* WHERE...Othello, Moses Lake, Coulee City, Creston, Spokane Valley,
Fairfield, Airway Heights, Badger Mountain Road, Ephrata,
Harrington, Ritzville, Downtown Spokane, Quincy, Mansfield, Grand
Coulee, Davenport, Rockford, Wilbur, Cheney, Odessa, and
Waterville.
* WHEN...From 1 AM to 8 AM PDT Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* WHAT...Temperatures as low as 32 will result in frost formation.
* WHERE...Bridgeport, Craigmont, Worley, Oroville, Okanogan, Hayden,
Nespelem, Omak, Nezperce, Coeur d'Alene, Disautel Pass, Kamiah,
Post Falls, Tonasket, Winchester, Soldiers Meadow Road, and
Brewster.
* WHEN...From 1 AM to 8 AM PDT Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* 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. This includes
portions of the Western Klamath National Forest, Southern Oregon
Coast, Western Siskiyou National Forest, and the Illinois
Valley. Poor RH recovery and gusty northeast winds will affect
ridges overnight, while all of the area will receive gusty
northeast winds and low RH in the afternoons.
* WIND...Tonight into Monday morning, 15 to 30 mph with gusts up
to 40 mph. Monday afternoon 10 to 20 mph with gusts up to 30
mph, then increasing to 15 to 25 mph with gusts up to 35 mph
Monday night into Tuesday morning.
* HUMIDITY...Single digits to upper teens in the afternoon.
Recoveries only 25 to 50 percent tonight and 20 to 35 percent
Monday night.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* 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...Northwest winds 25 to 35 mph with gusts up to 50 mph
expected.
* WHERE...Kittitas Valley.
* 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.
* ADDITIONAL DETAILS...Patchy blowing dust can also be expected.
* WHAT...Visibility between one-quarter and one mile in blowing dust.
* WHERE...Lower Columbia Basin of Washington and Foothills of the
Blue Mountains of Washington.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Hazardous driving conditions due to reduced visibility.
* ADDITIONAL DETAILS...Blowing dust has developed in northern
Franklin, Walla Walla, and Columbia counties between HWY395 and
HWY12. Additional areas of blowing dust are expected to develop
this afternoon.
* 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 Spokane has issued a
* Dust Storm Warning for...
Northeastern Adams County in eastern Washington...
North central Whitman County in eastern Washington...
Southeastern Lincoln County in eastern Washington...
* Until 330 PM PDT.
* At 225 PM PDT, a dust channel was 7 miles east of Ritzville, or 37
miles southwest of Cheney, moving east at 35 mph.
HAZARD...Less than a quarter mile visibility.
SOURCE...Trained weather spotters reported zero to one-quarter
visibility 7 miles northwest of Ritzville at 140 PM.
IMPACT...Dangerous life-threatening travel.
* This includes the following highways...
Interstate 90 in Washington between mile markers 212 and 247.
U.S. Highway 395 in Washington between mile markers 94 and 96.
Locations impacted include...
Ritzville, Sprague, Lamont, Marcellus, Tokio, Revere, and Packard.
* WHAT...Northwest winds 25 to 35 mph with gusts up to 50 mph
expected.
* WHERE...Kittitas Valley.
* 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.
* ADDITIONAL DETAILS...Patchy blowing dust can also be expected.
* 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 Spokane has issued a
* Dust Storm Warning for...
Northeastern Whitman County in eastern Washington...
Southeastern Lincoln County in eastern Washington...
Southern Spokane County in northeastern Washington...
* Until 300 PM PDT.
* At 127 PM PDT, a dust channel was 14 miles east of Ritzville, or 32
miles southwest of Cheney, moving east at 25 mph.
HAZARD...Less than a quarter mile visibility with strong wind in
excess of 40 mph.
SOURCE...Doppler radar.
IMPACT...Dangerous life-threatening travel.
* This includes the following highways...
Interstate 90 in Washington between mile markers 251 and 253.
U.S. Highway 195 in Washington between mile markers 35 and 78.
Locations impacted include...
Colfax, Palouse, Tekoa, Fairfield, Garfield, Rosalia, St. John,
Oakesdale, Endicott, Malden, Latah, Farmington, Waverly, Lamont,
Amber, Steptoe, Belmont, Diamond, Thornton, and Pine City.
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.
...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.
* Affected Area: Fire Weather Zone 101 Northern and Central
Idaho Panhandle (Zone 101), Fire Weather Zone 701 Foothills of
Northeast Washington (Zone 701), Fire Weather Zone 702
Colville Reservation (Zone 702), Fire Weather Zone 703
Okanogan Valley (Zone 703), Fire Weather Zone 706 Waterville
Plateau (Zone 706), Fire Weather Zone 707 Western Columbia
Basin (Zone 707), Fire Weather Zone 708 Eastern Columbia Basin
-Palouse -Spokane Area (Zone 708) and Fire Weather Zone 709
Lower Palouse -Snake River (Zone 709).
* Winds: West 15 to 25 mph with gusts up to 45 mph.
* Relative Humidities: 15 to 25 percent.
* Impacts: Risk for new wildfires to rapidly spread.
* WHAT...Temperatures as low as 32 will result in frost formation.
* WHERE...Tonasket, Hayden, Disautel Pass, Post Falls, Soldiers
Meadow Road, Okanogan, Winchester, Kamiah, Nezperce, Coeur
d'Alene, Bridgeport, Nespelem, Oroville, Omak, Worley, and
Craigmont.
* WHEN...From 1 AM to 8 AM PDT Monday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM PDT MONDAY...
* WHAT...For the Blowing Dust Advisory, visibility between
one-quarter and one mile in blowing dust expected near recently
worked fields. For the Freeze Warning, sub-freezing temperatures
as low as 30 expected.
* WHERE...Pullman, Rosalia, Uniontown, Tekoa, Colfax, La Crosse, and
Oakesdale.
* WHEN...For the Blowing Dust Advisory, from 9 AM this morning to 7
PM PDT this evening. For the Freeze Warning, from 1 AM to 8 AM PDT
Monday.
* IMPACTS...Hazardous driving conditions due to reduced visibility
from dust. Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.