The National Weather Service in Seattle has issued a Fire Weather
Watch for hot, dry and unstable conditions, which is in effect
from Saturday morning through Sunday evening.
* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North
Cascades Generally above 1500 Feet and Fire Weather Zone 659
West Slopes of the Central Cascades Generally above 1500 Feet.
* RELATIVE HUMIDITY...As low as 13 percent.
* TEMPERATURES...Up to 99.
* STABILITY...Unstable conditions can be expected
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
The National Weather Service in Seattle has issued a Fire Weather
Watch for hot, dry and unstable conditions, which is in effect
from Saturday morning through Saturday evening.
* AFFECTED AREA...Fire Weather Zone 661 East Portion of the
Olympic Mountains.
* RELATIVE HUMIDITY...As low as 25 percent in isolated areas.
* TEMPERATURES...Up to 88.
* STABILITY...Unstable conditions can be expected
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
Breezy easterly winds will develop Friday morning and continue
through Friday evening for the eastern Portland/Vancouver metro,
and through Friday night for the Columbia River Gorge and adjacent
Cascade ridgetops. Winds will be strongest on exposed ridgetops
where wind gusts will most likely peak between 25-35 mph.
Elsewhere, expect wind gusts between 15-20 mph, except up to 30
mph in the western Columbia River Gorge. The breezy east winds
will occur simultaneously with low relative humidity values of
20-30% or less, resulting in near critical fire weather
conditions. Use extra caution with potential ignition sources,
especially in grassy areas. Outdoor burning is not recommended.
Breezy easterly winds will develop Friday morning and continue
through Friday evening for the eastern Portland/Vancouver metro,
and through Friday night for the Columbia River Gorge and adjacent
Cascade ridgetops. Winds will be strongest on exposed ridgetops
where wind gusts will most likely peak between 25-35 mph.
Elsewhere, expect wind gusts between 15-20 mph, except up to 30
mph in the western Columbia River Gorge. The breezy east winds
will occur simultaneously with low relative humidity values of
20-30% or less, resulting in near critical fire weather
conditions. Use extra caution with potential ignition sources,
especially in grassy areas. Outdoor burning is not recommended.
* WHAT...Very hot conditions with high temperatures of 100 to 107
degrees expected. Overnight low temperatures of 60 to 70 degrees.
* WHERE...The valleys of Josephine and Jackson Counties. This
includes Agness, Grants Pass, Cave Junction, Williams, Ruch, Rogue
River, Gold Hill, White City, Shady Cove, Medford, Jacksonville,
Talent and Ashland.
* WHEN...From 1 PM Friday to 8 PM PDT Monday.
* IMPACTS...Unusually hot temperatures will increase risk for heat
related illnesses. Warm overnight temperatures will provide little
relief from hot daytime temperatures.
* WHAT...Hot conditions with high temperatures of 95 to 104 degrees
expected. Overnight low temperatures of 55 to 65 degrees.
* WHERE...The valleys of central and eastern Douglas County. This
includes Camas Valley, Elkton, Drain, Sutherlin, Roseburg,
Glendale, Riddle, Canyonville, Tiller and Toketee Falls.
* WHEN...From 1 PM Friday to 8 PM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Hot conditions with high temperatures of 95 to 100 degrees.
Overnight low temperatures of 50 to 60 degrees.
* WHERE...All areas from the Cascades eastward in Oregon, including
Union Creek, Klamath Falls, Chiloquin, Crescent, Fort Rock, Bly
and Lakeview. Also all of eastern Siskiyou County and Modoc County
in Northeast California, including Dorris, Macdoel, Tulelake,
Adin, Alturas and Likely.
* WHEN...From 1 PM Friday to 8 PM PDT Saturday.
* IMPACTS...Unusually hot temperatures will increase risk for heat
related illnesses.
...LOCALLY BREEZY WITH LOW RELATIVE HUMIDITY FRIDAY...
.As a heat wave moves over the region, a transitory period will
allow for locally breezy conditions along the east slopes of the
Oregon Cascades. The Warm Springs Reservation in particular, as
well as southeastern Wasco and northeastern Jefferson Counties,
are expected to see critical fire weather conditions during the
day Friday as RHs drop well into the teens.
The National Weather Service in Pendleton has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 2 PM to 11 PM PDT Friday. The Fire Weather Watch is no
longer in effect.
* AFFECTED AREA...Fire Weather Zone 703 Warm Springs Reservation.
* TIMING...From 2 PM to 11 PM PDT Friday.
* WINDS...Northeast 10 to 15 mph with gusts up to 25 mph.
* RELATIVE HUMIDITY...As low as 12 percent.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
* WHAT...Hot temperatures. High temperatures 95 to 102 degrees.
Limited overnight relief with low temperatures 65 to 74.
* WHERE...Bridgeport, Badger Mountain Road, Culdesac, Number 2
Canyon, Othello, Brewster, Peck, Okanogan, Waterville, Lapwai,
Coulee City, Clarkston, Winthrop, Moses Lake, Leavenworth, Twisp,
Harrington, Number 1 Canyon, Creston, Quincy, Tonasket, Disautel
Pass, Lewiston, Nespelem, Plain, Lewiston Grade, Omak, Grand
Coulee, Mansfield, Wilbur, Ritzville, Gifford, Alpowa Summit,
Entiat, Oroville, Ephrata, Methow, Chelan, Odessa, Pangborn
Airport, Wenatchee, Conconully, Pomeroy, Loup Loup Pass, Mazama,
and Cashmere.
* WHEN...From Saturday afternoon through Wednesday evening.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat of this magnitude affects anyone without cooling
and hydration as well as health systems and industries.
* WHAT...Hot conditions with high temperatures ranging from the mid
80s to 90s expected and low temperatures mostly in the 60s. This
will pose a moderate risk of heat-related illness.
* WHERE...Portions of northwest and west central Washington.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat will significantly increase the risk of
heat-related illnesses for those who are sensitive to heat,
especially those without effective cooling or adequate hydration.
* WHAT...Hot conditions with high temperatures ranging from the
upper 80s to upper 90s and low temperatures mostly in the 60s.
This will pose a major risk of heat-related illness.
* WHERE...Foothills and Valleys of the North Cascades, Foothills and
Valleys of Central King County, Foothills and Valleys of Pierce
and Southern King Counties, Foothills and Valleys of Snohomish and
Northern King Counties, and Foothills and Valleys of Thurston and
Lewis Counties.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Hot conditions with high temperatures ranging from the mid
80s to 90s expected and low temperatures mostly in the 60s. This
will pose a moderate risk of heat-related illness.
* WHERE...Lake Crescent Area Including US 101.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat will significantly increase the risk of
heat-related illnesses for those who are sensitive to heat,
especially those without effective cooling or adequate hydration.
* WHAT...Dangerously hot conditions with high temperatures of 95 to
105 degrees possible. This will pose a major to extreme risk of
heat-related illness.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From Saturday afternoon through Wednesday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Extreme heat will significantly increase the
risk of heat-related illnesses for much of the population,
especially those who are heat sensitive and those without
effective cooling or adequate hydration.
* WHAT...Dangerously hot conditions with high temperatures of 95 to
105 degrees possible. This will pose a major to extreme risk of
heat-related illness.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From Saturday afternoon through Wednesday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Extreme heat will significantly increase the
risk of heat-related illnesses for much of the population,
especially those who are heat sensitive and those without
effective cooling or adequate hydration.
* WHAT...Dangerously hot conditions with high temperatures of
95-103F and overnight low temperatures of 60-70F expected. The
warmest overnight lows will occur in urban areas to the north of
Salem and in the Columbia River Gorge.
* WHERE...Greater Portland/Vancouver Metro, Western and Central
Columbia River Gorge, the Corbett area and the Hood River Valley,
Central and Southern Willamette Valley, and Foothills of the
Northern and Central Oregon Cascades.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
* WHAT...Dangerously hot conditions with high temperatures of
95-101F and overnight low temperatures of 63-67F expected.
* WHERE...Lower Columbia River and Cowlitz River Valleys.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
* WHAT...Dangerous hot conditions with high temperatures up to
93-98F and overnight low temperatures of 60-68F expected.
* WHERE...South Washington Cascades and the Northern and Central
Cascades of Oregon, North and Central Coast Range Valleys of
Oregon, Willapa and Wahkiakum Lowlands, and South Washington
Cascade Foothills.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
Overnight lows on the mid slopes of the Cascades could be as warm
as 70F.
* WHAT...Dangerously hot conditions with high temperatures of
95-103F and overnight low temperatures of 60-70F expected. The
warmest overnight lows will occur in urban areas to the north of
Salem and in the Columbia River Gorge.
* WHERE...Greater Portland/Vancouver Metro, Western and Central
Columbia River Gorge, the Corbett area and the Hood River Valley,
Central and Southern Willamette Valley, and Foothills of the
Northern and Central Oregon Cascades.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
* WHAT...Dangerously hot conditions with high temperatures of
95-101F and overnight low temperatures of 63-67F expected.
* WHERE...Lower Columbia River and Cowlitz River Valleys.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
* WHAT...Dangerous hot conditions with high temperatures up to
93-98F and overnight low temperatures of 60-68F expected.
* WHERE...South Washington Cascades and the Northern and Central
Cascades of Oregon, North and Central Coast Range Valleys of
Oregon, Willapa and Wahkiakum Lowlands, and South Washington
Cascade Foothills.
* WHEN...From 11 AM Friday to 5 AM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, especially for those spending time outdoors
or without access to adequate cooling.
* ADDITIONAL DETAILS...Friday and Saturday will be the hottest days.
Overnight lows on the mid slopes of the Cascades could be as warm
as 70F.