* WHAT...Dangerously hot conditions with temperatures up to 100
degrees expected. This will pose a major risk of heat-related
illness.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Daily high temperature records are at risk
for many cities in the warning area Tuesday through Thursday.
* WHAT...Hot conditions with temperatures up to 97 degrees expected.
This will pose a moderate to major risk of heat-related illness.
* WHERE...In Oregon, Central Oregon, John Day Basin, Grande Ronde
Valley, and Northern Blue Mountains of Oregon. In Washington,
Lower Slopes of the Eastern Washington Cascades Crest and
Northwest Blue Mountains.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Afternoon high temperatures in the mid to upper 90s and
overnight low temperatures in the mid 60s to lower 70s expected.
* WHERE...Western and Central Columbia River Gorge and the Hood
River Valley.
* WHEN...Until 9 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Increasing high clouds may limit high
temperatures on Wednesday compared to Tuesday, however
probabilities for high temperatures above 90 degrees on Wednesday
are high, ranging from 75-95%.
* WHAT...Afternoon high temperatures in the mid to upper 90s and
overnight low temperatures in the mid 60s to lower 70s expected.
* WHERE...Western and Central Columbia River Gorge and the Hood
River Valley.
* WHEN...Until 9 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Increasing high clouds may limit high
temperatures on Wednesday compared to Tuesday, however
probabilities for high temperatures above 90 degrees on Wednesday
are high, ranging from 75-95%.
The Washington State Department of Ecology and/or the Yakima
Regional Clean Air Agency has issued an Air Quality Alert until
further notice.
An Air Quality Alert has been issued for Kittitas and Yakima
Counties until further notice due to current and expected wildfire
smoke from the Wildcat Fire. Particulate matter may reach Unhealthy
levels. When air quality is Unhealthy, everyone should reduce
exposure. Limit time outside, avoid strenuous outdoor activity, and
follow tips for cleaner indoor air. Hot temperatures will increase
the risk of heat-related illnesses. Drink plenty of fluids, stay in
an air-conditioned room, stay out of the sun, and check up on
relatives and neighbors.
Information about air quality from the Washington Department of
Ecology Web site is available at http://www.ecy.wa.gov/air.html or
call 360-407-6000.Information about air quality is on the Yakima
Regional Clean Air Agency Web site at http://www.yakimacleanair.org
or call 509-834-2050.
* AFFECTED AREA...In California, Fire weather zone 285. In
Oregon, Fire weather zones 617, 623, 624 and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
possible. Storms may produce little or no rain, and lightning
strikes outside of precipitation cores are possible, and may
cause many new fire starts. Thunderstorms are expected to
continue overnight and through Wednesday afternoon along and
east of the Cascades.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* ADDITIONAL DETAILS...In addition to thunderstorm potential,
conditions on Tuesday will be hot, dry, breezy, and unstable,
adding to the heightened fire weather concerns for the day.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* AFFECTED AREA...In California, Fire weather zones 280 and 281.
In Oregon, Fire weather zone 621.
* THUNDERSTORMS...Scattered thunderstorms with abundant
lightning possible. Storms may produce little or no rain, and
lightning strikes outside of precipitation cores are
possible, and may cause many new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* ADDITIONAL DETAILS...IN addition to thunderstorm potential,
conditions on Tuesday will be hot, dry, breezy, and unstable,
adding to the heightened fire weather concerns for the day.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
Spokane Regional Clean Air Agency
An Air Quality Alert has been issued for Stevens, Spokane, Lincoln,
and Grant Counties until further notice due to current wildfire smoke
from regional wildfires. Particulate matter (PM2.5) levels are
Unhealthy and smoke is expected to continue. When air quality is
Unhealthy, residents should take steps to reduce exposure. Limit time
outside, avoid strenuous outdoor activity, and follow tips for
cleaner indoor air. Hot temperatures will increase the risk of heat-
related illnesses. Drink plenty of fluids, stay in an air-conditioned
room, stay out of the sun, and check up on relatives and neighbors.
* WHAT...Dangerously hot conditions with high temperatures of 96 to
106 degrees.
* WHERE...Lapwai, Alpowa Summit, Peck, Gifford, Lewiston Grade,
Culdesac, Lewiston, Clarkston, and Pomeroy.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat Risk of this magnitude impacts almost everyone who
does not have access to adequate cooling or hydration.
* WHAT...Hot temperatures. High temperatures 95 to 103 degrees.
Limited overnight relief with low temperatures 60 to 70 degrees.
* WHERE...Post Falls, Downtown Spokane, Worley, Airway Heights,
Mansfield, Coeur d'Alene, Hayden, Creston, Ritzville, Cheney,
Waterville, Fairfield, Badger Mountain Road, Harrington, Odessa,
Rockford, Spokane Valley, Davenport, Wilbur, Grand Coulee, and
Coulee City.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat Risk of this magnitude impacts almost everyone who
does not have access to adequate cooling or hydration.
* WHAT...Dangerously hot conditions with high temperatures of 95 to
105 degrees.
* WHERE...Othello, Cashmere, Nespelem, Number 2 Canyon, Disautel
Pass, Entiat, Okanogan, Chelan, Tonasket, Omak, Moses Lake, Number
1 Canyon, Quincy, Wenatchee, Bridgeport, Brewster, Oroville,
Pangborn Airport, and Ephrata.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Hot temperatures will increase the risk of heat-related
illnesses. Heat Risk of this magnitude impacts almost everyone who
does not have access to adequate cooling or hydration.
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
An Air Quality Alert has been issued for Stevens, Lincoln, and Grant
Counties until further notice due to current wildfire smoke from
regional wildfires. Particulate matter (PM2.5) levels are Unhealthy
and smoke is expected to continue. When air quality is Unhealthy,
residents should take steps to reduce exposure. Limit time outside,
avoid strenuous outdoor activity, and follow tips for cleaner indoor
air. Hot temperatures will increase the risk of heat-related
illnesses. Drink plenty of fluids, stay in an air-conditioned room,
stay out of the sun, and check up on relatives and neighbors.
* WHAT...Hot conditions with high temperatures ranging from the
upper 80s to the mid 90s and low temperatures in the 60s and lower
70s. This will pose a moderate to locally 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...Until 5 PM PDT Thursday.
* 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.
* ADDITIONAL DETAILS...The hottest temperatures will primarily be
focused in the Cascade valleys on Wednesday and Thursday, where
temperatures in the mid 90s can be expected. The overnight lows
will remain very warm and provide little to no relief, especially
in locations such as Packwood, Marblemount, and Darrington.
* 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 20 percent.
* TEMPERATURES...Up to 90 degrees.
* 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.
* AFFECTED AREA...In California, Fire weather zones 284 and 285.
In Oregon, Fire weather zones 617, 623, 624 and 625.
* THUNDERSTORMS...Scattered thunderstorms with abundant lightning
possible. Storms may produce little or no rain, and lightning
strikes outside of precipitation cores are possible, and may
cause many new fire starts. Thunderstorms are expected to
continue through the overnight hours along and east of the
Cascades.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* ADDITIONAL DETAILS...In addition to thunderstorm potential,
conditions on Tuesday will be hot, dry, breezy, and unstable,
adding to the heightened fire weather concerns for the day.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* AFFECTED AREA...In California, Fire weather zones 280 and 281.
In Oregon, Fire weather zone 621.
* THUNDERSTORMS...Scattered thunderstorms with abundant
lightning possible. Storms may produce little or no rain, and
lightning strikes outside of precipitation cores are
possible, and may cause many new fire starts.
* OUTFLOW WINDS...Gusts of 35 to 50 mph could travel outward up
to 25 miles from thunderstorm cores.
* ADDITIONAL DETAILS...IN addition to thunderstorm potential,
conditions on Tuesday will be hot, dry, breezy, and unstable,
adding to the heightened fire weather concerns for the day.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Hot conditions with high temperatures ranging from the
upper 80s to the mid 90s and low temperatures in the 60s and lower
70s. This will pose a moderate to locally 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 noon today to 5 PM PDT Thursday.
* 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.
* ADDITIONAL DETAILS...The hottest temperatures will primarily be
focused in the Cascade valleys, where temperatures in the mid 90s
can be expected. The overnight lows will remain very warm and
provide little to no relief, especially in locations such as
Packwood, Marblemount, and Darrington.
The National Weather Service in Portland has issued a Fire
Weather Watch for thunderstorms, which is in effect from
Wednesday afternoon through Wednesday evening.
* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood
National Forest Region. In Washington, Fire Weather Zone 634
Southern Gifford Pinchot National Forest and Fire Weather Zone
635 Mt. Adams Ranger District of the Gifford Pinchot National
Forest.
* THUNDERSTORMS...A 10-25% chance of thunderstorms. Storms may
produce very little rainfall, increasing the risk of new fire
starts from dry lightning.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity over ongoing fires.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in new fire starts.
The National Weather Service in Portland has issued a Fire
Weather Watch for thunderstorms, which is in effect from
Wednesday afternoon through Wednesday evening.
* AFFECTED AREA...In Oregon, Fire Weather Zone 688 Mt. Hood
National Forest Region. In Washington, Fire Weather Zone 634
Southern Gifford Pinchot National Forest and Fire Weather Zone
635 Mt. Adams Ranger District of the Gifford Pinchot National
Forest.
* THUNDERSTORMS...A 10-25% chance of thunderstorms. Storms may
produce very little rainfall, increasing the risk of new fire
starts from dry lightning.
* OUTFLOW WINDS...Instantaneous gusts as high as 40 mph. Gusts at
these speeds can be observed tens of miles away from the core of
the thunderstorm.
* DRY AND UNSTABLE...Unstable conditions with elevated mixing
heights may promote pyroconvective activity over ongoing fires.
* IMPACTS...Conditions may be favorable for rapid fire spread
which may threaten life and property. Thunderstorm outflow
winds may result in unanticipated erratic fire spread. High
instability may result in fire growth. Frequent lightning and
critically dry fuels may result in new fire starts.