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* WHAT...Hot conditions. Afternoon high temperatures of 95 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 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...Hot conditions. Afternoon high temperatures of 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to lower 70s. This will pose a moderate to locally major risk of heat-related illness. * WHERE...In Oregon, Foothills of the Southern Blue Mountains of Oregon and North Central Oregon. In Washington, Simcoe Highlands. * WHEN...Until 10 PM PDT Wednesday. * 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 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to mid-70s. This will pose a moderate to locally major risk of heat-related illness. * WHERE...Eastern Columbia River Gorge of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, and Foothills of the Blue Mountains of Washington. * WHEN...Until 10 PM PDT Wednesday. * 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 95 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 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...Hot conditions. Afternoon high temperatures of 95 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...John Day Basin. * WHEN...Until 10 PM PDT Wednesday. * 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 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to lower 70s. This will pose a moderate to locally major risk of heat-related illness. * WHERE...In Oregon, Foothills of the Southern Blue Mountains of Oregon and North Central Oregon. In Washington, Simcoe Highlands. * WHEN...Until 10 PM PDT Wednesday. * 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 95 to 105 degrees accompanied by overnight low temperatures in the lower 60s to mid-70s. This will pose a moderate to locally major risk of heat-related illness. * WHERE...Eastern Columbia River Gorge of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, and Foothills of the Blue Mountains of Washington. * WHEN...Until 10 PM PDT Wednesday. * 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.

...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...11 PM through 5 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...11 PM through 5 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...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.