Aggregator

...Isolated to scattered thunderstorms Friday afternoon through Saturday afternoon... .A deep layer monsoonal moisture will push into the region Friday afternoon and evening. This will be followed by a potent shortwave expected to pass through the area late Friday night through Saturday afternoon. This is likely to result in isolated thunderstorms beginning as early as Friday afternoon, with isolated thunderstorms a possibility late Friday night into Saturday morning. Another round of thunderstorms is anticipated Saturday afternoon, with moderate confidence in scattered coverage along and east of the Cascades. ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Saturday morning through Saturday evening. * IMPACTS...For today, strong winds combined with low relative humidity can lead to rapid growth and spread of new and existing fires. For Saturday, abundant lightning on dry fuels will increase the risk of new fire starts. Additionally, gusty outflow winds will allow for new and existing fires to grow rapidly. * AFFECTED AREA...For today: the eastern and southern portions of fire weather zone 280, including the Scott Valley and eastern periphery of the Shelly fire perimeter and the southern most portions of fire weather zone 623 south of Highway 140. For Saturday, all of fire weather zones 280 and 623. * WIND...South winds 15 to 20 mph, with gusts up to 30 mph. * HUMIDITY...8 to 13 percent. * THUNDERSTORMS...Isolated to scattered thunderstorms, with the greatest coverage anticipated Saturday afternoon. Storms will initially start off dry Friday afternoon/evening, then trend wetter early Saturday and Saturday afternoon. Despite the wet nature of the thunderstorms, lightning strikes outside of precipitation cores are possible and cause for concern. * OUTFLOW WINDS...Gusts up to 40 to 50 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

...Isolated to scattered thunderstorms Friday afternoon through Saturday afternoon... .A deep layer monsoonal moisture will push into the region Friday afternoon and evening. This will be followed by a potent shortwave expected to pass through the area late Friday night through Saturday afternoon. This is likely to result in isolated thunderstorms beginning as early as Friday afternoon, with isolated thunderstorms a possibility late Friday night into Saturday morning. Another round of thunderstorms is anticipated Saturday afternoon, with moderate confidence in scattered coverage along and east of the Cascades. ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Saturday morning through Saturday evening. * IMPACTS...For today, strong winds combined with low relative humidity can lead to rapid growth and spread of new and existing fires. For Saturday, abundant lightning on dry fuels will increase the risk of new fire starts. Additionally, gusty outflow winds will allow for new and existing fires to grow rapidly. * AFFECTED AREA...For today: the eastern and southern portions of fire weather zone 280, including the Scott Valley and eastern periphery of the Shelly fire perimeter and the southern most portions of fire weather zone 623 south of Highway 140. For Saturday, all of fire weather zones 280 and 623. * WIND...South winds 15 to 20 mph, with gusts up to 30 mph. * HUMIDITY...8 to 13 percent. * THUNDERSTORMS...Isolated to scattered thunderstorms, with the greatest coverage anticipated Saturday afternoon. Storms will initially start off dry Friday afternoon/evening, then trend wetter early Saturday and Saturday afternoon. Despite the wet nature of the thunderstorms, lightning strikes outside of precipitation cores are possible and cause for concern. * OUTFLOW WINDS...Gusts up to 40 to 50 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...Dangerously hot conditions with temperatures 102 to 108 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 8 PM PDT Friday. * 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 92 to 102 degrees. This will pose a moderate risk of heat-related illness. * WHERE...Blue Mountains of Oregon and Washington, Grande Ronde Valley, Ochoco-John Day Highlands, East Slopes of the Oregon Cascades, North Central Oregon, Central Oregon, and Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...Until 8 PM PDT Friday. * 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 102 to 108 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 8 PM PDT Friday. * 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 92 to 102 degrees. This will pose a moderate risk of heat-related illness. * WHERE...Blue Mountains of Oregon and Washington, Grande Ronde Valley, Ochoco-John Day Highlands, East Slopes of the Oregon Cascades, North Central Oregon, Central Oregon, and Lower Slopes of the Eastern Washington Cascades Crest. * WHEN...Until 8 PM PDT Friday. * 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.

The National Weather Service in Spokane has issued a Red Flag Warning for hot, dry, and unstable conditions, which is in effect from noon Friday to 1 AM PDT Sunday. The Fire Weather Watch is no longer in effect. * Impacts: Combined with dry fuels...these conditions could result in very active convective columns and possible plume dominated fires. * Affected Area: Fire Weather Zone 696 East Washington Central Cascades (Zone 696) and Fire Weather Zone 697 East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697). * Winds: West 10 to 15 mph with gusts up to 25 mph. * Timing: Noon Friday to 1 AM PDT Sunday. * Relative Humidities: 14 to 30 percent in the valleys and 30 to 47 percent over the higher terrain. * Temperatures: Up to 94.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions with temperatures up to 108 expected. For the Heat Advisory, temperatures up to 102 expected. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, from noon Friday to midnight MDT Friday night. For the Heat Advisory, from midnight Friday night to 9 PM MDT Saturday. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* WHAT...Dangerously hot conditions with temperatures up to 106 expected. * WHERE...Harney County, Baker County and Malheur County. * WHEN...From noon MDT /11 AM PDT/ Friday to midnight MDT /11 PM PDT/ Friday night. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* WHAT...For the Excessive Heat Warning, dangerously hot conditions with temperatures up to 108 expected. For the Heat Advisory, temperatures up to 102 expected. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...For the Excessive Heat Warning, from noon Friday to midnight MDT Friday night. For the Heat Advisory, from midnight Friday night to 9 PM MDT Saturday. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

...POTENTIAL FOR SCATTERED THUNDERSTORMS SATURDAY INTO SUNDAY MORNING... The National Weather Service in Boise has issued a Fire Weather Watch for lightning, which is in effect from Saturday afternoon through Saturday evening. * Thunderstorms...Scattered. * Outflow Winds...Up to 60 MPH. * Timing...From Saturday afternoon through Saturday evening.

* WHAT...Major heat risk from high temperatures between the upper 90s to around 105, and with overnight lows from the upper 50s to upper 60s. * WHERE...Inland valleys west of the Cascades to include the Shasta, Scott, Klamath River, Rogue, Illinois, and Umpqua Valleys. This includes the cities and communities of Medford, Ashland, Phoenix, Talent, Eagle Point, Grants Pass, Roseburg, Sutherlin, Yreka, Montague, and Weed. * WHEN...From 2 PM this afternoon to 8 AM PDT Saturday. * IMPACTS...Hot temperatures may cause heat illness. * ADDITIONAL DETAILS...Certain medications may make you more vulnerable to heat illness, check with your doctor or pharmacist for details.

An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology Colville Confederated Tribes An Air Quality Alert issued for all of Chelan, Okanogan, Ferry, and Asotin County, as well as the Colville Reservation is in effect until further notice, due to expected smoke from nearby and 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. 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.

The National Weather Service in Pendleton has issued a Red Flag Warning for dry and unstable conditions, which is in effect from 11 AM to 9 PM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 640 Central Mountains of Oregon, 642 Southern Blue and Strawberry Mountains and 644 Central Blue Mountains. * TIMING...Late morning Friday through early evening. * WINDS...Southwest 5 to 10 mph. * RELATIVE HUMIDITY...As low as 9 percent. * TEMPERATURES...97 to 105. * IMPACTS...The combination of hot, dry and unstable conditions may lead to extreme fire behavior. * HAINES...As high as 6.

Oregon Department of Environmental Quality has issued an Air Pollution Advisory...in effect until noon PDT Friday. The Oregon Department of Environmental Quality issued an air quality advisory for Jackson, Klamath and Lake counties due to numerous wildfires burning in the region. DEQ also expects intermittent smoke in Eastern Douglas and Josephine counties through at least Friday due to smoke from surrounding fires. The wildfire smoke combined with forecast conditions will cause air quality levels to fluctuate and could be at unhealthy levels. Smoke levels can change rapidly depending on the weather and planned burn operations. Smoke can irritate the eyes and lungs and worsen some medical conditions. People most at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. People can take the following precautions to protect their health: - Follow local burn restrictions to prevent deteriorating air quality. - Avoid strenuous outdoor activity during periods of poor air quality. - People with heart or lung problems and young children are especially vulnerable. These people should stay indoors while smoke levels are high. - Use certified High Efficiency Particulate Air (HEPA) filters in indoor heating, ventilation, cooling and air purification systems. - Avoid using wood-burning stoves and other sources of indoor smoke if possible. For additional information...please visit the web site at https://oregonsmoke.org

* WHAT...Hot temperatures. High temperatures 90 to 100. The hottest temperatures will be on Friday. * WHERE...Cloverland Road, Anatone, Peola, and Mountain Road. * WHEN...Until 8 PM PDT Saturday. * IMPACTS...Heat will increase the risk of heat-related illnesses, especially for those without effective cooling or adequate hydration.

* WHAT...Hot temperatures. High temperatures 90 to 106. The hottest temperatures will be on Friday. * WHERE...Clark Fork, Eastport, Inchelium, Metaline Falls, Ione, Fruitland, Sherman Pass, Newport, Priest River, Metaline, Republic, Kettle Falls, Northport, Sandpoint, Tiger, Wauconda, Schweitzer Mountain Road, Deer Park, Orin-Rice Road, Highway 20 Wauconda Summit, Flowery Trail Road, Chesaw Road, Athol, Boulder Creek Road, Springdale-Hunters Road, Bonners Ferry, Chewelah, and Colville. * WHEN...From 11 AM Friday to 8 PM PDT Saturday. * IMPACTS...Heat will increase the risk of heat-related illnesses, especially for those without effective cooling or adequate hydration.

* WHAT...Very hot temperatures. High temperatures 94 to 109. The hottest temperatures will be on Friday. Limited overnight relief with low temperatures 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 Saturday. * IMPACTS...Heat will increase the risk of heat-related illnesses, especially for those without effective cooling or adequate hydration.

The National Weather Service in Spokane has issued a Fire Weather Watch for hot and unstable conditions which is in effect from Friday afternoon through late Saturday night. * Affected Area: Fire Weather Zone 696 East Washington Central Cascades (Zone 696) and Fire Weather Zone 697 East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697). * Instability: Hot temperatures and mixing heights around 12000 feet resulting in an unstable atmosphere. * Winds: West 10 to 15 mph with gusts up to 25 mph. * Timing: Friday afternoon through Saturday evening. * Relative Humidities: 14 to 30 percent in the valleys and 30 to 47 percent over the higher terrain. * Temperatures: Up to 94. * Impacts: Combined with dry fuels...these conditions could result in very active convective columns and possible plume dominated fires.

* WHAT...Dangerously hot conditions with temperatures 102 to 108 degrees expected. 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 this morning to 8 PM PDT Friday. * 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.