Aggregator

* WHAT...Very hot temperatures. Friday's high temperatures 102 and 108 with up to 112 degrees around Lewiston. Saturday's high temperatures 95 to 101 with up to 105 at Omak. * 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. * ADDITIONAL DETAILS...Overnight temperatures will be well above average with some areas staying above 80 degrees well into the night. Homes without air conditioning will struggle to cool overnight.

...AIR QUALITY ADVISORY FROM THE OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY FOR Harney and Malheur Counties... * WHAT...High concentration of smoke particulates from numerous wild fires in Oregon and Nothern California * WHERE...Harney and Malheur Counties. * WHEN...Until at least 2 PM PDT MONDAY. * IMPACTS...Smoke can irritate the eyes, lungs and worsen some medical conditions. People most at risk to adverse health effects include infants, young children, people with heart or lung disease, older adults, and pregnant women. * ADDITIONAL DETAILS...Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog, DEQ's Air Quality Index, or by downloading the free OregonAIR app on your smartphone.

...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO 1 AM PDT SUNDAY FOR HOT, DRY AND UNSTABLE CONDITIONS FOR EAST WASHINGTON CENTRAL CASCADES, EAST PORTION OF NORTH CASCADES NATIONAL PARK/LAKE CHELAN NATIONAL RECREATION AREA... * 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: Friday, terrain driven wind 4 to 8 mph. Friday evening through Saturday evening, west or northwest wind 6 to 9 mph with evening gusts to 16 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: High temperatures 100 to 105 in the valleys and 85 to 95 in the higher terrain.

A deep layer monsoonal moisture will push into the region this afternoon and evening. This will be followed by a potent shortwave expected to pass through the area late tonight through Saturday afternoon. This is likely to result in isolated thunderstorms beginning late this afternoon, with isolated thunderstorms a possibility tonight into Saturday morning. Another round of thunderstorms is anticipated Saturday afternoon, with moderate confidence in scattered coverage along and east of the Cascades. The National Weather Service in Medford has upgraded the Fire Weather Watch to a Red Flag Warning which is in effect from 11 AM to 11 PM PDT Saturday. * IMPACTS..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...Most areas from the Cascade crest east, including FWZs 623, 624, 625, 284, 285. And west of the Cascade crest, FWZs 617 and 280. * THUNDERSTORMS...Isolated to scattered thunderstorms, with the greatest coverage anticipated Saturday afternoon. Storms will initially start off dry late this 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

An Air Quality Alert was issued by the following agencies: Washington Department of Ecology Colville Confederated Tribes An Air Quality Alert continues for all of Okanogan and Ferry Counties, 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 Air Quality Alert has ended for Chelan and Asotin counties.

* WHAT...Very hot temperatures. Friday's high temperatures 102 and 108 with up to 112 degrees around Lewiston. Saturday's high temperatures 95 to 101 with up to 105 at Omak. * 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. * ADDITIONAL DETAILS...Overnight temperatures will be well above average with some areas staying above 80 degrees well into the night. Homes without air conditioning will struggle to cool overnight.

* WHAT...Hot temperatures. High temperatures 90 to 100. The hottest temperatures will be on Friday. * WHERE...Cloverland Road, Peola, Anatone, 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...Very hot temperatures. Friday's high temperatures 98 and 103 degrees. Saturday's high temperatures 95 and 100 degrees. * WHERE...Republic, Bonners Ferry, Flowery Trail Road, Kettle Falls, Springdale-Hunters Road, Metaline Falls, Newport, Colville, Athol, Sandpoint, Wauconda, Ione, Chesaw Road, Tiger, Fruitland, Boulder Creek Road, Clark Fork, Sherman Pass, Inchelium, Eastport, Chewelah, Northport, Metaline, Schweitzer Mountain Road, Deer Park, Priest River, Orin-Rice Road, and Highway 20 Wauconda Summit. * WHEN...From 11 AM this morning 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...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 this evening. * 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 this evening. * 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 this evening. * 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 this evening. * 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 THIS AFTERNOON AND EVENING... .An upper level ridge of high pressure will remain over the region through today, producing hot and dry conditions. A weak weather disturbance riding up the ridge and over the region will bring increasing unstable conditions across the eastern mountains, with a slight chance of isolated thunderstorms in the afternoon. * AFFECTED AREA...Fire Weather Zones 640 Central Mountains of Oregon, 642 Southern Blue and Strawberry Mountains and 644 Central Blue Mountains. * TIMING...Late this morning through mid evening. * WINDS...West 5 to 10 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 101. * IMPACTS...The combination of hot, dry and unstable conditions may lead to extreme fire behavior. * HAINES...As high as 6.

...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO 1 AM PDT SUNDAY FOR HOT, DRY AND UNSTABLE CONDITIONS FOR EAST WASHINGTON CENTRAL CASCADES, EAST PORTION OF NORTH CASCADES NATIONAL PARK/LAKE CHELAN NATIONAL RECREATION AREA... * 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: Friday, terrain driven wind Friday 4 to 8 mph. Friday evening through Saturday evening, west or northwest wind 6 to 9 mph with evening gusts to 16 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: High temperatures 100 to 105 in the valleys and 85 to 95 in the higher terrain.

* 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 today to midnight MDT tonight. For the Heat Advisory, from midnight tonight to midnight MDT Saturday 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 today to midnight MDT tonight. For the Heat Advisory, from midnight tonight to midnight MDT Saturday night. * 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/ today to midnight MDT /11 PM PDT/ tonight. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* 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...Until 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.

* IMPACTS..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...Most areas from the Cascade crest east, including FWZs 623, 624, 625, 284, 285. And west of the Cascade crest, FWZs 617 and 280. * 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 forecast to be dry 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 Follow all fire restrictions. Avoid activities that could cause sparks. Visit weather.gov/medford/wildfire for links to fire restrictions in your area. If you have not packet your go kit yet, now is the time to do so. This includes items like important documents and essentials you cannot live without. Fill your vehicle's fuel tank. Visit ready.gov/kit for more information. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning..

...HOT, DRY, AND UNSTABLE CONDITIONS FRIDAY AFTERNOON AND EVENING... .An upper level ridge of high pressure will remain over the region Friday, producing hot and dry conditions. A weak weather disturbance riding up the ridge and over the region Friday will bring increasing unstable conditions across the eastern mountains, with a slight chance of isolated thunderstorms in the afternoon. * 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...West 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.