* WHAT...Hot conditions. Afternoon high temperatures of 99 to 103
degrees accompanied by overnight low temperatures in the mid-60s
to lower 70s. This will pose a moderate to major risk of
heat-related illness.
* WHERE...Kittitas Valley and Yakima Valley.
* WHEN...Until 10 PM PDT this evening.
* 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. Afternoon high temperatures of 96 to 105
degrees accompanied by overnight low temperatures in the lower 60s
to lower 70s. This will pose a moderate to major risk of
heat-related illness.
* WHERE...Lower Columbia Basin of Oregon and Washington.
* WHEN...Until 10 PM PDT this evening.
* 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. Afternoon high temperatures of
99 to 103 degrees accompanied by overnight low temperatures in the
mid-60s to lower 70s. This will pose a moderate to major risk of
heat-related illness.
* WHERE...Kittitas Valley and Yakima Valley.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...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.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
* Affected Area: Fire Weather Zone 709 Lower Palouse - Snake
River.
* Thunderstorms: Isolated to scattered thunderstorms through the
evening.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop. The outflow winds could travel quite
a distance from the core of the storm.
* Impacts: Thunderstorms containing little to no rain and gusty
winds combined with dry fuels will lead to the potential for new
fire starts in addition to current fires, may overwhelm initial
attack capabilities.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
* Affected Area: Fire Weather Zone 708 Eastern Columbia Basin -
Palouse-Spokane Area.
* Thunderstorms: Isolated thunderstorms mainly over the Palouse.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop.
* Impacts: Thunderstorms containing little to no rain and gusty
winds combined with dry fuels will lead to the potential for new
fire starts in addition to current fires, may overwhelm initial
attack capabilities.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
* Affected Area: Fire Weather Zone 699 Okanogan Highlands and
Kettle Mountains, Fire Weather Zone 702 Colville Reservation,
* Thunderstorms: Scattered thunderstorms.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop.
* Impacts: Thunderstorms containing little to no rain combined
with dry fuels will lead to the potential for new fire starts
that may overwhelm initial attack capabilities. Gusty winds with
thunderstorms will result in rapid fire spread with any new or
existing fires.
* WHAT...Hot conditions. High temperatures up to 102 degrees
accompanied by overnight lows in the mid to upper 60s. This will
pose a moderate to locally major risk of heat-related illness.
* WHERE...Lower Columbia Basin of Oregon and Washington.
* WHEN...Until 10 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.
* WHAT...Dangerously hot conditions with temperatures up to 101
degrees has receded and the risk has ended
* WHERE...Kittitas Valley and Yakima Valley.
* WHEN...Until 10 PM PDT Thursday.
* IMPACTS...Dangerously hot conditions with temperatures up to 101
degrees has receded and the risk has ended
At 511 PM PDT, Doppler radar was tracking a strong thunderstorm over
southwestern Hanford Reservation, or 20 miles northwest of Richland,
moving northeast at 40 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Hanford Reservation.
At 505 PM PDT, Doppler radar was tracking a strong thunderstorm near
Boardman, moving northeast at 50 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Boardman, Irrigon, and Paterson.
An Air Quality Alert has been issued by the following agencies:
Washington Department of Ecology
An Air Quality Alert, issued for all of Chelan County plus
the Methow Valley down to Brewster in Okanogan County will remain
in effect until further notice, due to expected smoke from the
Pioneer Fire and other regional wildfires. Particulate matter
(PM2.5) may reach Unhealthy and Unhealthy for Sensitive Groups
levels.
Health Impacts and Recommended Actions: When air quality is Unhealthy,
everyone should reduce exposure. Limit time outside, avoid strenuous
activity, and follow tips for cleaner indoor air. When air quality
is Unhealthy for Sensitive Groups, sensitive groups should take steps
to reduce exposure. Limit time outside, avoid strenuous outdoor
activity, and follow tips for cleaner indoor air. Everyone should
watch for symptoms as a sign to reduce exposure.
Agricultural and outdoor burning restrictions are in effect.
* AFFECTED AREA...Fire Weather Zone 652 West Portion of the
Olympic Mountains and Fire Weather Zone 661 East Portion of
the Olympic Mountains.
* THUNDERSTORMS...Scattered thunderstorms with LAL 3 are expected
during the afternoon and evening hours.
* OUTFLOW WINDS...Gusty and erratic winds are possible in the
vicinity of any thunderstorms that develop.
* IMPACTS...Scattered lightning in dry fuels can cause multiple
fire starts. Thunderstorms can also bring sudden sharp wind
shifts on existing fires, causing rapid changes in a fire's
rate of spread and direction of spread. Thunderstorm outflow
winds can be a threat for several hours following the start of
a new lightning-caused fire. If a fire were to begin, air
quality may diminish in the surrounding area.
* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North
Cascades Generally above 1500 Feet.
* THUNDERSTORMS...Scattered thunderstorms with LAL 3 are expected
to develop along and near the crest of the Cascades during the
afternoon and evening hours.
* OUTFLOW WINDS...Gusty and erratic winds are possible in the
vicinity of any thunderstorms that develop.
* IMPACTS...Scattered lightning in dry fuels can cause multiple
fire starts. Thunderstorms can also bring sudden sharp wind
shifts on existing fires, causing rapid changes in a fire's
rate of spread and direction of spread. Thunderstorm outflow
winds can be a threat for several hours following the start of
a new lightning-caused fire. If a fire were to begin, air
quality may diminish in the surrounding area.
* AFFECTED AREA...Fire Weather Zone 659 West Slopes of the
Central Cascades Generally above 1500 Feet.
* THUNDERSTORMS...Scattered thunderstorms with LAL 3 are expected
during the afternoon and evening hours.
* OUTFLOW WINDS...Gusty and erratic winds are possible in the
vicinity of any thunderstorms that develop.
* IMPACTS...Scattered lightning in dry fuels can cause multiple
fire starts. Thunderstorms can also bring sudden sharp wind
shifts on existing fires, causing rapid changes in a fire's
rate of spread and direction of spread. Thunderstorm outflow
winds can be a threat for several hours following the start of
a new lightning-caused fire. If a fire were to begin, air
quality may diminish in the surrounding area.
* WHAT...Hot conditions during the day for the valleys. Highs 95 to
110. Overnight lows mainly in the upper 50s and 60s.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...Until 10 PM PDT Sunday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
* WHAT...Hot conditions during the day for the valleys. Highs 90 to
100. Overnight lows mainly in the upper 50s and 60s.
* WHERE...Tiger, Metaline Falls, Fruitland, Springdale-Hunters Road,
Newport, Inchelium, Flowery Trail Road, Deer Park, Ione, Boulder
Creek Road, Metaline, Sherman Pass, Republic, Northport, Wauconda,
Kettle Falls, Chewelah, Highway 20 Wauconda Summit, Orin-Rice
Road, Colville, and Chesaw Road.
* WHEN...Until 10 PM PDT Sunday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
The National Weather Service in Spokane has issued a Red Flag
Warning for thunderstorms, which is in effect from 4 PM this
afternoon to 2 AM PDT Thursday.
* Affected Area: Fire Weather Zone 701 Foothills of Northeast
Washington.
* Thunderstorms: Isolated to scattered thunderstorms late this
afternoon and through the evening.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop. The outflow winds could travel quite
a distance from the core of the storm.
* Impacts: Unstable conditions could lead to plume dominated
fires. Thunderstorms containing little to no rain and gusty
winds combined with dry fuels will lead to the potential for
new fire starts in addition to current fires, may overwhelm
initial attack capabilities.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
The National Weather Service in Spokane has issued a Red Flag
Warning for thunderstorms, which is in effect until midnight
tonight.
* Affected Area: Fire Weather Zone 709 Lower Palouse - Snake
River.
* Thunderstorms: Isolated to scattered thunderstorms late this
afternoon and through the evening.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop. The outflow winds could travel quite
a distance from the core of the storm.
* Impacts: Unstable conditions could lead to plume dominated
fires. Thunderstorms containing little to no rain and gusty
winds combined with dry fuels will lead to the potential for
new fire starts in addition to current fires, may overwhelm
initial attack capabilities.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
* Affected Area: Fire Weather Zone 696 East Washington Central
Cascades, Fire Weather Zone 697 East Portion of North Cascades
National Park/Lake Chelan National Recreation Area, Fire Weather
Zone 698 East Washington North Cascades, Fire Weather Zone 699
Okanogan Highlands and Kettle Mountains, Fire Weather Zone 702
Colville Reservation, Fire Weather Zone 703 Okanogan Valley,
Fire Weather Zone 704 Methow Valley, Fire Weather Zone 705
Foothills of Central Washington Cascades and Fire Weather Zone
706 Waterville Plateau.
* Thunderstorms: Scattered thunderstorms with abundant lightning.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop. The outflow winds could travel quite
a distance from the core of the storm.
* Impacts: Thunderstorms containing little to no rain combined
with dry fuels will lead to the potential for new fire starts
that may overwhelm initial attack capabilities. Gusty winds with
thunderstorms will result in rapid fire spread with any new or
existing fires.
Isolated to scattered thunderstorms containing little to no
rainfall will be possible over much of Washington this afternoon
and tonight. Any thunderstorms have the potential to produce
gusty outflow winds that could travel quite a distance from the
thunderstorm source.
* Affected Area: Fire Weather Zone 707 Western Columbia Basin and
Fire Weather Zone 708 Eastern Columbia Basin - Palouse
-Spokane Area.
* Thunderstorms: Isolated coverage for the western Columbia Basin
and isolated to scattered as you head towards the Palouse and
Spokane area. The best potential of thunderstorms for the
Palouse and Spokane area looks to be after 5 PM.
* Outflow Winds: Gusty and erratic winds are possible with any
thunderstorms that develop. Gusty winds from thunderstorms that
develop over the Cascades and north central Washington could
send an outflow boundary across the Columbia Basin, Palouse and
Spokane area.
* Haines: High level haines of 6, which is high. This means very
dry and unstable conditions exist.
* Humidity: 12 to 19 percent.
* Impacts: Unstable conditions could lead to plume dominated
fires. Thunderstorms containing little to no rain and gusty
winds combined with dry fuels will lead to the potential for
new fire starts in addition to current fires, may overwhelm
initial attack capabilities.
