* WHAT...Hot conditions with temperatures up to 100 degrees. This
will pose a major risk of heat-related illness.
* WHERE...Lower Columbia Basin of Oregon and Washington, Grande
Ronde Valley, Wallowa County, John Day Basin, Foothills of the
Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of
the Blue Mountains of 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.
* Affected Area: Fire Weather Zone 696 East Washington Central
Cascades (Zone 696), Fire Weather Zone 697 East Portion of
North Cascades National Park/Lake Chelan National Recreation
Area (Zone 697), Fire Weather Zone 698 East Washington North
Cascades (Zone 698), Fire Weather Zone 704 Methow Valley (Zone
704) and Fire Weather Zone 705 Foothills of Central Washington
Cascades (Zone 705).
* Winds: West 15 to 20 mph with gusts of 30 mph or more. Be
prepared for the arrival of a dry cold front between 4 PM and 6
PM.
* Relative Humidities: 15 to 25 percent in the valleys and 25 to
35 percent over the higher terrain.
* Lightning: There is a 10 percent chance of thunderstorms over
Chelan county prior to 9 AM. There is a 10 percent chance of
thunderstorms across western and central Okanogan county between
6 AM and 11 AM followed by additional isolated lightning between
2 PM and 5 PM.
* Impacts: Isolated thunderstorms will bring the risk for new fire
starts and gusty and erratic outflow winds. Rapid fire spread
with any new or existing fires due to gusty winds Monday
afternoon and evening.
* Affected Area: Fire Weather Zone 703 Okanogan Valley (Zone
703).
* Winds: South 15 to 20 mph with gusts up to 30 mph.
* Relative Humidities: 12 to 20 percent.
* Lightning: There is 10% chance for thunderstorms over western
and central Okanogan county between 6 AM and 11 AM followed by
additional isolated lightning between 2 PM and 5 PM. Gusty
outflow winds up to 35 mph possible.
* Impacts: Rapid fire spread with any new or existing fires due to
gusty winds. Isolated thunderstorms will bring the risk for new
fire starts and gusty and erratic outflow winds.
* WHAT...Hot conditions with temperatures up to 100 degrees. This
will pose a major risk of heat-related illness.
* WHERE...Lower Columbia Basin of Oregon and Washington, Grande
Ronde Valley, Wallowa County, John Day Basin, Foothills of the
Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of
the Blue Mountains of 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...High temperatures 95 to 105 this afternoon.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...Until 8 PM PDT this evening.
* IMPACTS...Today won't be as hot as it was Sunday, but the risk of
heat related illnesses remains high for those without access to
air conditioning. Exposure to hot weather day after day increases
the potential for heat stress.
* WHAT...Dangerously hot conditions with temperatures up to 104
degrees. This will pose a major risk of heat-related illness.
* WHERE...Lower Columbia Basin of Oregon and Washington, Grande
Ronde Valley, Wallowa County, John Day Basin, Foothills of the
Northern Blue Mountains of Oregon, Yakima Valley, and Foothills of
the Blue Mountains of Washington.
* WHEN...Until 10 PM PDT Monday.
* 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.
* 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.
* THUNDERSTORMS...Scattered chance of thunderstorms over the
Cascade mountains with LAL 3 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...High temperatures 100 to 110 through Monday. Lows in the
mid 60s to mid 70s.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...Until 8 PM PDT Monday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
* WHAT...Hot temperatures. Valley high temperatures 98 to 105. Highs
in the mountains in the 80s and 90s.
* WHERE...Holden Village, Stevens Pass, and Stehekin.
* WHEN...Until 8 PM PDT Monday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
* AFFECTED AREA...
In Washington,
* Fire Weather Zone 634 - Southern Gifford Pinchot NF.
* Fire Weather Zone 635 - Mount Adams District.
* THUNDERSTORMS...Isolated to scattered thunderstorms.
* IMPACTS...Frequent lightning and critically dry fuels may
result in numerous fire starts. Thunderstorm outflow winds may
result in erratic fire spread.
* Affected Area: Fire Weather Zone 696 East Washington Central
Cascades (Zone 696), Fire Weather Zone 697 East Portion of
North Cascades National Park/Lake Chelan National Recreation
Area (Zone 697), Fire Weather Zone 698 East Washington North
Cascades (Zone 698), Fire Weather Zone 704 Methow Valley (Zone
704) and Fire Weather Zone 705 Foothills of Central Washington
Cascades (Zone 705).
* Winds: East to southeast 5 to 10 mph through Sunday afternoon.
Wind shift to the west or northwest 10 to 15 mph Sunday
afternoon into the evening. Localized wind gusts of 30 mph or
more with showers and thunderstorms into Sunday evening. Winds
significantly increase late Monday afternoon with the dry cold
front passage to northwest 15 to 25 mph with gusts around 35
mph.
* Relative Humidities: 7 to 16 percent in the valleys and 16 to 25
percent over the higher terrain.
* Temperatures: 95 to 108 in the valleys. 80s and 90s in the
mountains.
* Impacts: Unstable conditions could lead to plume dominated fires
Sunday. Isolated thunderstorms will bring the risk for new fire
starts and gusty and erratic outflow winds. Rapid fire spread
with any new or existing fires due to gusty winds Monday
afternoon and evening.
* Affected Area: Fire Weather Zone 703 Okanogan Valley (Zone
703).
* Winds: South 15 to 20 mph with gusts up to 30 mph.
* Relative Humidities: 8 to 19 percent.
* Temperatures: Up to 104.
* Lightning: There is 10% chance for thunderstorms Monday
afternoon and evening. Gusty outflow winds up to 35 mph
possible.
* Impacts: Rapid fire spread with any new or existing fires due to
gusty winds. Isolated thunderstorms will bring the risk for new
fire starts and gusty and erratic outflow winds.
Corrected to add Zone 636 to list of Oregon zones.
* AFFECTED AREA...
In Oregon,
* Fire Weather Zone 686 - Northern Oregon Cascade Foothills.
* Fire Weather Zone 688 - Mt. Hood National Forest Region.
* Fire Weather Zone 636 - Western Columbia River Gorge.
In Washington,
* Fire Weather Zone 634 - Southern Gifford Pinchot NF.
* Fire Weather Zone 635 - Mt. Adams Ranger District.
* Fire Weather Zone 636 - Western Columbia River Gorge.
* THUNDERSTORMS...Isolated to scattered thunderstorms.
* IMPACTS...Frequent lightning and critically dry fuels may
result in numerous fire starts. Thunderstorm outflow winds may
result in erratic fire spread.
* WHAT...Dangerously hot conditions with temperatures of 100 to 110
degrees. This will pose a major risk of heat-related illness.
* WHERE...Portions of central, north central, and northeast Oregon
and central, south central, and southeast Washington.
* WHEN...Until 10 PM PDT Monday.
* 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.
* WHAT...Hot conditions with temperatures of 95 to 105 degrees. This
will pose a moderate to major risk of heat-related illness.
* WHERE...In Oregon, Central Oregon, Ochoco-John Day Highlands, and
North Central Oregon. In Washington, Lower Slopes of the Eastern
Washington Cascades Crest.
* WHEN...Until 8 PM PDT Monday.
* 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 temperatures. Valley high temperatures 98 to 105. Highs
in the mountains in the 80s and 90s.
* WHERE...Holden Village, Stevens Pass, and Stehekin.
* WHEN...Until 8 PM PDT Monday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
* WHAT...High temperatures 100 to 110 through Monday. Lows in the
mid 60s to mid 70s.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...Until 8 PM PDT Monday.
* IMPACTS...Heat will increase the risk of heat-related illnesses,
especially those without effective cooling or adequate hydration.
* Affected Area: Fire Weather Zone 696 East Washington Central
Cascades (Zone 696), Fire Weather Zone 697 East Portion of
North Cascades National Park/Lake Chelan National Recreation
Area (Zone 697), Fire Weather Zone 698 East Washington North
Cascades (Zone 698), Fire Weather Zone 704 Methow Valley (Zone
704) and Fire Weather Zone 705 Foothills of Central Washington
Cascades (Zone 705).
* Winds: East to southeast 5 to 10 mph through mid afternoon.
Wind shift to the west or northwest 10 to 15 mph late afternoon
into the evening. Localized wind gusts of 30 mph or more with
showers and thunderstorms mid Sunday afternoon into Sunday
evening.
* Relative Humidities: 7 to 16 percent in the valleys and 16 to
24 percent over the higher terrain.
* Temperatures: 100 to 108 in the valleys. Upper 80s and 90s in
the mountains.
* Lightning: There is 10 to 15% chance for thunderstorms late
Sunday afternoon into Sunday night. Gusty outflow winds up to 30
mph possible.
* Impacts: Unstable conditions could lead to plume dominated
fires. Isolated thunderstorms will bring the risk for new fire
starts and gusty and erratic outflow winds.
* AFFECTED AREA...In Oregon, Fire Weather Zone 686 Northern
Oregon Cascade Foothills and Fire Weather Zone 688 Mt. Hood
National Forest Region. In Washington, Fire Weather Zone 634
Southern Gifford Pinchot National Forest, Fire Weather Zone
635 Mt. Adams Ranger District of the Gifford-Pinchot National
Forest and Fire Weather Zone 636 Western Columbia River Gorge
in Oregon and Washington.
* THUNDERSTORMS...Isolated to scattered thunderstorms.
* IMPACTS...Frequent lightning and critically dry fuels may
result in numerous fire starts. Thunderstorm outflow winds may
result in erratic fire spread.
* OUTFLOW WINDS...Brief gusts to 35 mph possible.
* 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.
* THUNDERSTORMS...Scattered chance of thunderstorms over the
Cascade mountains with LAL 3 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.
