Aggregator

* WHAT...Hot conditions with temperatures of 95 to 105 degrees expected. 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 this morning 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 to 110 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 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 expected. 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 this morning 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 THROUGH SUNDAY... A strong ridge of high pressure will amplify over the Pacific Northwest leading to very hot, dry, and unstable conditions. The combination will result in conditions conducive to extreme fire behavior, particularly for any ongoing fires in the region. * AFFECTED AREA...Fire Weather Zones 642 Southern Blue and Strawberry Mountains and 644 Central Blue Mountains. * TIMING...11 AM Today to Sunday 11 PM. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 95 to 105 degrees. * IMPACTS...Current fires could exhibit extreme fire behavior. * HAINES...As high as 6.

The Oregon Department of Environmental Quality issued an air quality advisory for Klamath and northern Lake counties due to numerous wildfires burning in the region. DEQ also expects other areas of the state may see intermittent smoke from ongoing large wildfires, including eastern Douglas and northeast Jackson counties. 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. 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. DEQs color-coded Air Quality Index provides current air quality conditions and ranks air quality as follows: Green is good. Yellow is moderate. Orange is unhealthy for sensitive groups such as children, the elderly, pregnant women and those with respiratory conditions. Red is unhealthy for everyone. Purple is very unhealthy for all groups. Maroon is hazardous. For additional information...please visit the web site at https://oregonsmoke.org

An upper level low will move up from the south along the California coast late this afternoon, and will tap into increasing mid-level moisture. Meanwhile, elevated instability will increase and this combined with a moderate to strong trigger could result in isolated to scattered thunderstorms late this evening into Sunday morning, and again Sunday afternoon and evening. Given how dry fuels are, along with continued hot temperatures, lightning efficiency will be high to very high for fire starts. The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Sunday afternoon through Sunday evening. * IMPACTS...Given the prolonged stretch of very hot and very dry conditions, lightning efficiency will be high to very high for fire starts. Additionally, gusty outflow winds will allow for new and existing fires to grow rapidly out of control. * AFFECTED AREA...All of Fire weather zone 625. * THUNDERSTORMS...Isolated to scattered thunderstorms are possible Sunday afternoon and evening. 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

An upper level low will move up from the south along the California coast late this afternoon, and will tap into increasing mid-level moisture. Meanwhile, elevated instability will increase and this combined with a moderate to strong trigger could result in isolated to scattered thunderstorms late this evening into Sunday morning, and again Sunday afternoon and evening. Given how dry fuels are, along with continued hot temperatures, lightning efficiency will be high to very high for fire starts. The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from this afternoon through Sunday evening. * IMPACTS...Given the prolonged stretch of very hot and very dry conditions, lightning efficiency will be high to very high for fire starts. Additionally, gusty outflow winds will allow for new and existing fires to grow rapidly out of control. * AFFECTED AREA...All of Fire Weather Zone 624. For this afternoon and evening, scattered thunderstorms are possible roughly south of a line from Crater Lake to Summer Lake. For Sunday afternoon and evening, scattered thunderstorms are possible across the eastern portions of the Fremont-Winema National Forest, along the Klamath/Lake County border and eastward. * THUNDERSTORMS...Isolated to scattered thunderstorms are possible late this afternoon and evening and again Sunday afternoon and evening. 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. * ADDITIONAL DETAILS...Thunderstorm activity is mainly expected during the afternoons and evenings. * DETAILED URL...View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr

An upper level low will move up from the south along the California coast late this afternoon, and will tap into increasing mid-level moisture. Meanwhile, elevated instability will increase and this combined with a moderate to strong trigger could result in isolated to scattered thunderstorms late this evening into Sunday morning, and again Sunday afternoon and evening. Given how dry fuels are, along with continued hot temperatures, lightning efficiency will be high to very high for fire starts. * IMPACTS...Given the prolonged stretch of very hot and very dry conditions, lightning efficiency will be high to very high for fire starts. Additionally, gusty outflow 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 late tonight into early Sunday morning. 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...Afternoon high temperatures in the middle to upper 90s. * WHERE...Clark County, Columbia River Gorge, Upper Hood River Valley, and the Willamette Valley. * WHEN...From 11 AM to 11 PM PDT today. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Afternoon high temperatures in the middle to upper 90s. * WHERE...Clark County, Columbia River Gorge, Upper Hood River Valley, and the Willamette Valley. * WHEN...From 11 AM to 11 PM PDT today. * IMPACTS...Hot temperatures may cause heat illnesses.

The National Weather Service in Portland has issued a Fire Weather Watch for thunderstorms, which is in effect from late Saturday night through Sunday evening. * AFFECTED AREA...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.

The National Weather Service in Portland has issued a Fire Weather Watch for thunderstorms, which is in effect from late Saturday night through early Sunday evening. * AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern and Central Willamette Valley. In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region. * 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 Fire Weather Watch for thunderstorms, which is in effect from late this afternoon through Sunday evening. * AFFECTED AREA...In Oregon, Fire Weather Zone 683 Central Oregon Coast Range, Fire Weather Zone 685 Southern Willamette Valley, Fire Weather Zone 686 Northern Oregon Cascade Foothills, Fire Weather Zone 687 Central Oregon Cascade Foothills, Fire Weather Zone 688 Mt. Hood National Forest Region, Fire Weather Zone 689 Northern Willamette National Forest and Fire Weather Zone 690 Southern Willamette National Forest. * 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 Fire Weather Watch for thunderstorms, which is in effect from late Saturday night through early Sunday evening. * AFFECTED AREA...In Oregon, Fire Weather Zone 684 Northern and Central Willamette Valley. In Washington, Fire Weather Zone 633 Clark County Lowlands and Swift Reservoir Region. * 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...High temperatures of up 100 to 108 degrees expected. * WHERE...Klamath, Modoc, Lake, and central and eastern Siskiyou counties, including Klamath Falls, Weed, Yreka, Mount Shasta City, Lakeview, Alturas, Chiloquin, Chemult, Fort Rock, and the Christmas Valley. * WHEN...From 11 AM this morning to 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur.

* WHAT...Temperatures up to 102 with lower elevation valleys near the Snake River up to 106. * WHERE...Baker County. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses to occur.

* WHAT...Temperatures of 100 to 103 in the lowest elevations. * WHERE...Portions of south central and southwest Idaho and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses to occur.

* WHAT...Dangerously hot conditions with temperatures up to 104 to 108. * WHERE...Portions of southwest and west central Idaho and southeast Oregon. * WHEN...Until 9 PM MDT /8 PM PDT/ Wednesday. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

Oregon Department of Environmental Quality has issued an Air Quality Advisory...IN EFFECT UNTIL 5 PM PDT MONDAY. A Smoke Air Quality Advisory has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels. Pollutants in smoke can cause burning eyes...runny nose...aggravate heart and lung diseases...and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. For additional information...please visit the Web site at http://www.oregon.gov/DEQ

Oregon Department of Environmental Quality has issued an Air Quality Advisory...IN EFFECT FROM 10 AM SATURDAY TO MIDNIGHT PDT SATURDAY NIGHT. An Air Quality Advisory for Ozone has been issued. High levels of ozone in the lower atmosphere in the region combined with forecasted conditions will cause air quality to reach unhealthy levels at times through Saturday evening. Smog and Ozone irritates the eyes, nose and lungs, and contributes to breathing problems. Consult your health care provider if these symptoms worsen. For additional information...please visit the Web site at http://www.oregon.gov/DEQ