Aggregator

An upper level low will move up from the south along the California coast Saturday, and will tap into some moisture that is expected to increase late Saturday afternoon into Saturday night. At the same time elevated instability will increase along with a moderate to strong trigger which could result in isolated to possibly scattered thunderstorms in the overnight period Saturday into Sunday morning. Given how dry fuels are along with the recent hot stretch, lightning efficiency will he high despite storms coming in during the night. The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Saturday afternoon through Sunday morning. * IMPACTS...Given the recent prolonged stretch of very hot and very dry conditions, lightning efficiency will be high to very high for fire starts. Any fires that develop will likely spread rapidly. Additionally, winds will allow for new and existing fires to grow rapidly out of control. * AFFECTED AREA...All of Fire Zones 615, 616, 617, 618, 619, 620, 622, and 623. * THUNDERSTORMS...Isolated to scattered thunderstorms are possible Saturday night. Lightning strikes outside of precipitation cores are possible and cause for concern. * OUTFLOW WINDS...Gusts up to 40 mph. These outflow winds can travel up to 50 miles away from the thunderstorm that caused it. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

* WHAT...Hot temperatures. Highs Friday 94 to 99, 98 to 107 Saturday through Monday. Overnight lows mainly in the upper 50s and 60s. * WHERE...Metaline Falls, Boulder Creek Road, Springdale-Hunters Road, Chewelah, Orin-Rice Road, Tiger, Chesaw Road, Republic, Highway 20 Wauconda Summit, Fruitland, Colville, Deer Park, Kettle Falls, Wauconda, Ione, Northport, Sherman Pass, Flowery Trail Road, Metaline, Inchelium, and Newport. * WHEN...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 8 PM PDT Monday. * IMPACTS...Heat will increase the risk of heat-related illnesses, especially those without effective cooling or adequate hydration.

* WHAT...Very hot temperatures. High temperatures in the valleys 95 to 103 Friday, 97 to 107 Saturday, near 100 to 110 Sunday and 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...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 8 PM PDT Monday. * 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 mid 90s to 105. Overnight lows mainly in the upper 50s and 60s * WHERE...Anatone, Craigmont, Kamiah, Mountain Road, Winchester, Nezperce, Cloverland Road, Soldiers Meadow Road, and Peola. * WHEN...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

* WHAT...Hot temperatures. Valley high temperatures 98 to 105. Highs in the mountains in the 80s and 90s. * WHERE...Stevens Pass, Stehekin, and Holden Village. * WHEN...From 11 AM Saturday to 8 PM PDT Monday. * IMPACTS...Heat will increase the risk of heat-related illnesses, especially those without effective cooling or adequate hydration.

* WHAT...Very hot temperatures. High temperatures in the valleys 95 to 103 Friday, 97 to 107 Saturday, near 100 to 110 Sunday and 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...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 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. Highs Friday 94 to 99, 98 to 107 Saturday through Monday. Overnight lows mainly in the upper 50s and 60s. * WHERE...Metaline Falls, Boulder Creek Road, Springdale-Hunters Road, Chewelah, Orin-Rice Road, Tiger, Chesaw Road, Republic, Highway 20 Wauconda Summit, Fruitland, Colville, Deer Park, Kettle Falls, Wauconda, Ione, Northport, Sherman Pass, Flowery Trail Road, Metaline, Inchelium, and Newport. * WHEN...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 8 PM PDT Monday. * 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 mid 90s to 105. Overnight lows mainly in the upper 50s and 60s * WHERE...Anatone, Craigmont, Kamiah, Mountain Road, Winchester, Nezperce, Cloverland Road, Soldiers Meadow Road, and Peola. * WHEN...For the Heat Advisory, until 11 AM PDT Saturday. For the Excessive Heat Warning, from 11 AM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

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.

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.

* WHAT...Daytime temperatures between 94 and 98 degrees expected. * WHERE...Portions of southwest Washington and northwest Oregon, including the Willamette Valley, the Portland Metro Area, Clark County lowlands, the western and central Columbia River Gorge, and Hood River Valley. * WHEN...From 11 AM to 11 PM PDT Saturday. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Daytime temperatures between 94 and 98 degrees expected. * WHERE...Portions of southwest Washington and northwest Oregon, including the Willamette Valley, the Portland Metro Area, Clark County lowlands, the western and central Columbia River Gorge, and Hood River Valley. * WHEN...From 11 AM to 11 PM PDT Saturday. * IMPACTS...Hot temperatures may cause heat illnesses.

...HOT DRY AND UNSTABLE CONDITIONS SUNDAY ACROSS THE CASCADES... The National Weather Service in Spokane has issued a Fire Weather Watch for hot dry and unstable conditions, which is in effect from Sunday afternoon through Sunday evening. * 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 704 Methow Valley and Fire Weather Zone 705 Foothills of Central Washington Cascades. * Winds: Southeast 5 to 10 mph becoming northwest 5 to 10 mph towards sunset. * Timing: 3 PM to 10 PM * Relative Humidities: 8 to 14 percent in the valleys and 15 to 24 percent over the higher terrain. * Temperatures: Up to 108. * Impacts: Unstable conditions could lead to plume dominated fires. Rapid fire spread with any new or existing fires. These conditions may overwhelm initial attack capabilities.

* WHAT...Dangerously hot conditions with temperatures of 100-110 degrees expected over the weekend. 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...From 11 AM Saturday to 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 100-105 degrees expected over the weekend. 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...From 11 AM Saturday to 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...Dangerously hot conditions with temperatures of 100-110 degrees expected over the weekend. 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...From 11 AM Saturday to 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 100-105 degrees expected over the weekend. 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...From 11 AM Saturday to 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.

...HOT, DRY, AND UNSTABLE CONDITIONS EXPECTED SATURDAY THROUGH SUNDAY... The high pressure will intensify over the region over the weekend bringing increased instability to the region Saturday through Sunday. This instability in combination with hot and dry conditions will result in the potential for extreme fire behavior, particularly for any currently ongoing fires in the region. The National Weather Service in Pendleton has issued a Fire Weather Watch for dry and unstable conditions, which is in effect from Saturday morning through Sunday evening. * AFFECTED AREA...Fire Weather Zone 644 Central Blue Mountains. * TIMING...Saturday 11 AM to Sunday 11 PM. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...95 to 105. * IMPACTS...Current fires could exhibit extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY, AND UNSTABLE CONDITIONS EXPECTED SATURDAY THROUGH SUNDAY... The high pressure will intensify over the region over the weekend bringing increased instability to the region Saturday through Sunday. This instability in combination with hot and dry conditions will result in the potential for extreme fire behavior, particularly for any currently ongoing fires in the region. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * TIMING...Saturday 11 AM to Sunday 11 PM. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...95 to 105 * IMPACTS...Current fires could exhibit extreme fire behavior. * HAINES...As high as 6.

...HOT, DRY, AND UNSTABLE CONDITIONS EXPECTED ON SATURDAY... A passing shortwave and flow becoming more southerly will bring increased instability to the region on Saturday. This instability in combination with hot and dry conditions will result in the potential for extreme fire behavior, particularly for any currently ongoing fires in the region. * AFFECTED AREA...Fire Weather Zone 642 Southern Blue and Strawberry Mountains. * TIMING...Saturday 11 AM to 11 PM. * WINDS...Northeast 5 to 10 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 100. * IMPACTS...Current fires will exhibit extreme fire behavior. * HAINES...As high as 6.