* 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.
* 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...From noon today to 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 National Weather Service in Seattle has issued a Fire Weather
Watch for hot, dry and unstable conditions, which is in effect
from Wednesday afternoon through Wednesday 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 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.
The National Weather Service in Spokane has issued a Fire Weather
Watch for Hot, dry, unstable conditions, which is in effect from
Wednesday morning through Thursday evening.
* Affected Area: East Washington Central Cascades (Zone 696).
* Winds: Terrain driven winds 2 to 5 mph becoming northwest 5 to
10 mph in the evening.
* Relative Humidities: Minimum humidity: 13 to 19 percent.
Humidity recoveries on midslopes within thermal belts of 25-35%
* Temperatures: 85 to 100 degrees.
* Impacts: Hot, dry, unstable conditions will lead to the
potential for rapid fire growth on new or existing fires.
* 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 Tuesday 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.
* 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...From noon Tuesday to 9 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Increasing high clouds may limit high
temperatures a bit on Wednesday when compared to Tuesday. However,
probabilities for high temperatures above 90 degrees on Wednesday
are high, ranging from 80-90%.
* 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 Tuesday 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.
* 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...From 11 AM Tuesday to 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...From 11 AM to 8 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Hot temperatures. High temperatures 93 to 103 degrees.
Limited overnight relief with low temperatures 58 to 65 degrees.
* WHERE...Newport, Tiger, Clark Fork, Pinehurst, Schweitzer Mountain
Road, Ione, Deer Park, Colville, Eastport, Kettle Falls,
Fruitland, Metaline Falls, Chewelah, Northport, Fernwood, St.
Maries, Sandpoint, Priest River, Dobson Pass, Osburn, Flowery
Trail Road, Kellogg, Lookout Pass, Fourth Of July Pass, Athol,
Metaline, Mullan, Orin-Rice Road, Bonners Ferry, Wallace, and
Springdale-Hunters Road.
* 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 96 to 106
degrees.
* WHERE...Alpowa Summit, Lewiston, Pomeroy, Clarkston, Lapwai, Peck,
Culdesac, Lewiston Grade, and Gifford.
* 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...For the Heat Advisory, high temperatures 92 to 99 degrees.
For the Extreme Heat Warning, dangerously hot conditions with high
temperatures 97 to 105 degrees.
* WHERE...Oroville, Chelan, Brewster, Okanogan, Number 1 Canyon,
Wenatchee, Omak, Nespelem, Pangborn Airport, Number 2 Canyon,
Entiat, Cashmere, Bridgeport, Tonasket, and Disautel Pass.
* WHEN...For the Heat Advisory, until 11 AM PDT Tuesday. For the
Extreme Heat Warning, from 11 AM Tuesday to 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...For the Heat Advisory, high temperatures 92 to 99 degrees.
For the Extreme Heat Warning, dangerously hot conditions with high
temperatures 95 to 104 degrees.
* WHERE...Quincy, Moses Lake, Othello, and Ephrata.
* WHEN...For the Heat Advisory, until 11 AM PDT Tuesday. For the
Extreme Heat Warning, from 11 AM Tuesday to 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...Grand Coulee, Airway Heights, Hayden, Spokane Valley,
Davenport, Fairfield, Post Falls, Creston, Worley, Badger Mountain
Road, Downtown Spokane, Coeur d'Alene, Ritzville, Wilbur, Coulee
City, Rockford, Mansfield, Odessa, Harrington, Waterville, and
Cheney.
* 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...For the Heat Advisory, high temperatures 92 to 99 degrees.
For the Extreme Heat Warning, dangerously hot conditions with high
temperatures 95 to 104 degrees.
* WHERE...Quincy, Moses Lake, Othello, and Ephrata.
* WHEN...For the Heat Advisory, until 11 AM PDT Tuesday. For the
Extreme Heat Warning, from 11 AM Tuesday to 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...For the Heat Advisory, high temperatures 92 to 99 degrees.
For the Extreme Heat Warning, dangerously hot conditions with high
temperatures 97 to 105 degrees.
* WHERE...Oroville, Chelan, Brewster, Okanogan, Number 1 Canyon,
Wenatchee, Omak, Nespelem, Pangborn Airport, Number 2 Canyon,
Entiat, Cashmere, Bridgeport, Tonasket, and Disautel Pass.
* WHEN...For the Heat Advisory, until 11 AM PDT Tuesday. For the
Extreme Heat Warning, from 11 AM Tuesday to 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 County until
further notice due to current wildfire smoke from the Crown Creek
fire, Katy Creek fire, and Blackhawk Mountain Fire. Particulate
matter (PM2.5) levels are Unhealthy for Sensitive Groups. When air
quality is Unhealthy for Sensitive Groups, residents should take
steps to reduce exposure. Limit time outside, avoid strenuous
activity, and follow tips for cleaner air. Everyone should watch for
symptoms as a sign to reduce exposure.
* Affected Area: East Washington North Cascades (Zone 698),
Okanogan Highlands and Kettle Mountains (Zone 699), Colville
Reservation (Zone 702), Okanogan Valley (Zone 703), Methow
Valley (Zone 704) and Waterville Plateau (Zone 706).
* Thunderstorms: Isolated to Scattered thunderstorms with
rainfall amounts less than a tenth of an inch.
* Outflow Winds: Gusty and erratic winds up to 40 mph near
thunderstorms.
* Impacts: New fire starts are likely with thunderstorms. Gusty
outflow winds may lead to fire spread with any new fire starts.
