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...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District, 639 East Slopes of the Northern Oregon Cascades and 640 Central Mountains of Oregon. * IMPACTS...Any lightning strikes combined with hot and dry conditions could cause new fire starts. * THUNDERSTORMS...Isolated to scattered dry thunderstorms are possible. * OUTFLOW WINDS...35 to 40 mph.

...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * TIMING...Until 11 PM. * WINDS...South 5 mph or less. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 93. * IMPACTS...Any new fire starts will exhibit extreme fire behavior. Current fire on landscape will also exhibit extreme fire behavior. * HAINES...As high as 6.

* WHAT...Daytime temperatures between 95 to 100 expected. Overnight lows between 65 to 70 will limit chances to recover from the heat Tuesday night. * WHERE...In Oregon, Central Columbia River Gorge I-84 Corridor, East Portland Metro, Inner Portland Metro, and West Columbia River Gorge I-84 Corridor. In Washington, Central Columbia River Gorge SR 14 Corridor, East Clark County Lowlands, Inner Vancouver Metro, and West Columbia River Gorge SR 14 Corridor. * WHEN...Until 8 AM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Daytime temperatures between 95 to 100 expected. Overnight lows between 65 to 70 will limit chances to recover from the heat Tuesday night. * WHERE...In Oregon, Central Columbia River Gorge I-84 Corridor, East Portland Metro, Inner Portland Metro, and West Columbia River Gorge I-84 Corridor. In Washington, Central Columbia River Gorge SR 14 Corridor, East Clark County Lowlands, Inner Vancouver Metro, and West Columbia River Gorge SR 14 Corridor. * WHEN...Until 8 AM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses.

...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon, 690 Kittitas Valley, 691 Lower Columbia Basin, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * TIMING...2 PM through 11 PM. * WINDS...North 5 to 10 mph. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Up to 101. * IMPACTS...Any new fire starts will exhibit extreme fire behavior. Current fire on landscape will also exhibit extreme fire behavior. * HAINES...As high as 6. * THUNDERSTORMS...Isolated to scattered thunderstorms are possible. * OUTFLOW WINDS...35 to 40 mph.

...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of Oregon, 690 Kittitas Valley, 691 Lower Columbia Basin, 694 Yakama Alpine District and 695 East Washington South Central Cascade Mountains. * TIMING...2 PM through 11 PM. * WINDS...North 5 to 10 mph. * RELATIVE HUMIDITY...As low as 13 percent. * TEMPERATURES...Up to 101. * IMPACTS...Any new fire starts will exhibit extreme fire behavior. Current fire on landscape will also exhibit extreme fire behavior. * HAINES...As high as 6. * THUNDERSTORMS...Isolated to scattered thunderstorms are possible. * OUTFLOW WINDS...35 to 40 mph.

...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zones 610 East Slopes of Central Oregon Cascades, 611 Deschutes National Forest -minus Sisters Ranger District, 639 East Slopes of the Northern Oregon Cascades and 640 Central Mountains of Oregon. * IMPACTS...Any lightning strikes combined with hot and dry conditions could cause new fire starts. * THUNDERSTORMS...Isolated to scattered dry thunderstorms are possible. * OUTFLOW WINDS...35 to 40 mph.

...ISOLATED THUNDERSTORMS AND DRY, UNSTABLE CONDITIONS THIS AFTERNOON, OVERNIGHT, AND WEDNESDAY... A low pressure system will move north-northeastward into the Pacific Northwest late today through Wednesday night. This system will provide enough moisture and elevated instability for high- based showers and isolated thunderstorms to develop late this afternoon, overnight, and Wednesday. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * TIMING...2 PM through 11 PM. * WINDS...South 5 mph or less. * RELATIVE HUMIDITY...As low as 11 percent. * TEMPERATURES...Up to 93. * IMPACTS...Any new fire starts will exhibit extreme fire behavior. Current fire on landscape will also exhibit extreme fire behavior. * HAINES...As high as 6.

...SCATTERED THUNDERSTORMS THROUGH THIS EVENING FOR ZONE 636, AND WEDNESDAY AFTERNOON AND EARLY EVENING FOR ZONE 426... * Thunderstorms...Scattered coverage with little to no rainfall expected. * Outflow Winds...Up to 60 mph possible. * Timing...Until 11 PM PDT this evening.

The National Weather Service in Seattle has issued a Red Flag Warning for dry thunderstorms and gusty outflow winds, which is in effect from 8 AM to 11 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * 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 as early as late morning and most likely 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.

The National Weather Service in Seattle has issued a Red Flag Warning for dry thunderstorms and gusty outflow winds, which is in effect from 8 AM to 11 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * THUNDERSTORMS...Scattered thunderstorms with LAL 3 are expected to develop along and near the crest of the Cascades as early as late morning and most likely 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.

The National Weather Service in Seattle has issued a Red Flag Warning for dry thunderstorms and gusty outflow winds, which is in effect from 8 AM to 11 PM PDT Wednesday. * 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 to develop early as late morning and most likely 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.

Scattered thunderstorms containing little to no rainfall will be possible over much of North Central Washington Wednesday afternoon and evening. Any thunderstorms have the potential to produce gusty outflow winds that could travel quite a distance from the thunderstorm source. Isolated thunderstorms are possible elsewhere across Eastern Washington and North Idaho. The National Weather Service in Spokane has issued a Red Flag Warning for abundant lightning, which is in effect from 11 AM Wednesday to midnight PDT Wednesday night. The Fire Weather Watch is no longer in effect. * 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, LAL 6. * 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.

Scattered thunderstorms containing little to no rainfall will be possible over much of North Central Washington Wednesday afternoon and evening. Any thunderstorms have the potential to produce gusty outflow winds that could travel quite a distance from the thunderstorm source. Isolated thunderstorms are possible elsewhere across Eastern Washington and North Idaho. The National Weather Service in Spokane has issued a Red Flag Warning for thunderstorms, which is in effect from noon Wednesday to midnight Wednesday night. * Affected Area: Fire Weather Zone 707 Western Columbia Basin and Fire Weather Zone 708 Eastern Columbia Basin - Palouse -Spokane Area. * Haines: High level haines of 6, which is very high. This means very dry and unstable conditions exist. * Humidity: 12 to 19 percent. * 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. * Thunderstorms: Thunderstorm coverage at this time looks to be isolated across the Basin, Palouse and Spokane area. * Impacts: Unstable conditions could lead to plume dominated fires. Rapid fire spread with any new or existing fires due to the gusty wind potential. These conditions may overwhelm initial attack capabilities.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from 11 PM this evening to 5 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...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...Isolated to scattered thunderstorms. * IMPACTS...Lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread. * IMPACTS...Frequent lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from 11 PM this evening to 11 AM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region and Fire Weather Zone 636 Western Columbia River Gorge in Oregon and Washington. * THUNDERSTORMS...Isolated to scattered thunderstorms. * IMPACTS...Lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread. * IMPACTS...Frequent lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from 11 PM this evening to 11 AM PDT Wednesday. * AFFECTED AREA...In Washington, Fire Weather Zone 632 Cowlitz County Foothills. * 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.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect from 5 PM this afternoon to 8 AM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern and Central Willamette Valley, Fire Weather Zone 686 Northern Oregon Cascade Foothills and Fire Weather Zone 688 Mt. Hood National Forest Region. * THUNDERSTORMS...Isolated to scattered thunderstorms. * IMPACTS...Lightning and critically dry fuels may result in numerous fire starts. * OUTFLOW WINDS...There is a 10% chance for wind gusts in excess of 50 mph from the strongest storms through this evening. * IMPACTS...Frequent lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread.

The National Weather Service in Portland has issued a Red Flag Warning for thunderstorms, which is in effect until 5 AM PDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Oregon, Fire Weather Zone 685 Southern Willamette Valley, Fire Weather Zone 687 Central Oregon Cascade Foothills, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * THUNDERSTORMS...Isolated to scattered thunderstorms. * IMPACTS...Lightning and critically dry fuels may result in numerous fire starts. Thunderstorm outflow winds may result in erratic fire spread. * OUTFLOW WINDS...There is a 10% chance for wind gusts in excess of 50 mph from the strongest storms through this evening. * 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 high temperatures up to 110 possible at low elevations. Hottest days Sunday and Monday. * WHERE...Portions of south central, southwest and west central Idaho and southeast Oregon. * WHEN...From Thursday afternoon through Tuesday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.