Aggregator

* 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.

...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. * 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...In California, all of fire weather zones284 and 285. In Oregon, all of fire weather zones 617, 624 and 625. * 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. The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Saturday morning through Saturday evening. * 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...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. * 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...Hot temperatures. High temperatures 90 to 100. The hottest temperatures will be on Friday. * WHERE...Peola, Mountain Road, and Anatone. * 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...Priest River, Colville, Metaline Falls, Metaline, Newport, Northport, Deer Park, Kettle Falls, Inchelium, Chewelah, Bonners Ferry, Eastport, Sandpoint, Ione, Republic, and Clark Fork. * 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. 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.

...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...Temperatures up to 99. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

* WHAT...Temperatures up to 99. * WHERE...Portions of northwest and west central Oregon and southwest Washington. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.

...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: 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.

...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. The National Weather Service in Medford has issued a Fire Weather Watch, which is in effect from Saturday morning through Saturday evening. * 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...In California, all of fire weather zones 284 and 285. In Oregon, all of fire weather zones 617, 624 and 625. * 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