* WHAT...High temperatures of 95 to 102 degrees with lows in the mid
to upper 50s expected.
* WHERE...In California, Modoc County and eastern Siskiyou County.
This includes the cities and communities of Macdoel, Tulelake,
Pondosa, Bray, Tennant, Dorris, Tionesta, Alturas, and Adin. In
Oregon, Klamath and Lake counties. This includes the cities of
Klamath Falls, Chemult, Summer Lake, Chiloquin, Malin, Keno,
Sprague River, and Lakeview.
* WHEN...Until 9 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses. Area rivers
will be cold and can cause shock to swimmers.
* WHAT...Dangerously hot conditions with high temperatures 105 to
115, and low temperatures in the mid 60s to lower 70s.
* WHERE...In California, western and central Siskiyou County. This
includes the cities of Yreka, Weed, Etna, Happy Camp, Mt Shasta
City, and Dunsmuir. In Oregon, Josephine and Jackson counties and
eastern Curry County. This includes the entire Rogue Valley and
the cities of Medford, Grants Pass, Cave Junction, and Butte Falls.
* WHEN...Until 9 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Area rivers will be cold and can cause shock
to swimmers.
* WHAT...Hot conditions with afternoon temperatures up to 100
degrees and overnight lows in the 60s. This will pose a moderate
to major risk of heat-related illness.
* WHERE...Portions of northwest and west central Washington.
* WHEN...Until 10 PM PDT Tuesday.
* 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.
* ADDITIONAL DETAILS...Temperatures will gradually cool during the
middle and late portions of the week, but will remain well above
normal in the 80s for much of the lowlands.
* WHAT...Hot conditions with temperatures away from the immediate
coastline in the 80s degrees. This will pose a moderate risk of
heat-related illness.
* WHERE...Central Coast, North Coast, and Western Strait of Juan De
Fuca.
* WHEN...Until 11 AM PDT Tuesday.
* 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.
* ADDITIONAL DETAILS...Temperatures along the immediate coast will
be cooler, but this will not extend very far inland during the
daytime hours through Monday. Some relief is possible during the
overnight hours, but will be gradual and somewhat brief. Stronger
onshore flow will bring a return to closer to normal temperatures
for the coastal areas by midweek.
* AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North
Cascades Generally above 1500 Feet and Fire Weather Zone 659
West Slopes of the Central Cascades Generally above 1500 Feet.
* RELATIVE HUMIDITY...As low as 15 to 20 percent with moderate to
poor overnight recovery.
* TEMPERATURES...High temperatures 85 to 95 degrees with overnight
lows in the 60s.
* MID-LEVEL HAINES...6
* IMPACTS...A dry and unstable air mass with warm temperatures
can contribute to active fire behavior. In western Washington,
significant growth on existing fires takes place under such
conditions. If a fire were to begin, air quality may diminish
in the surrounding area.
* WHAT...For the Excessive Heat Warning, dangerously hot
conditions with temperatures 105-110 expected. For the
Excessive Heat Watch, dangerously hot conditions with
temperatures up to 106 possible.
* WHERE...Oregon Lower Treasure Valley.
* WHEN...For the Excessive Heat Warning, from 2 PM Monday to
midnight MDT Thursday night. For the Excessive Heat Watch,
from late Thursday night through Sunday evening.
* 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 105-110 expected. For the
Excessive Heat Watch, dangerously hot conditions with
temperatures up to 106 possible.
* WHERE...Portions of southwest and west central Idaho and
southeast Oregon.
* WHEN...For the Excessive Heat Warning, from 11 AM MDT /10 AM
PDT/ Tuesday to midnight MDT /11 PM PDT/ Thursday night. For
the Excessive Heat Watch, from late Thursday night through
Sunday evening.
* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.
* WHAT...For the Heat Advisory, temperatures up to 100-103
expected. For the Excessive Heat Watch, dangerously hot
conditions with temperatures up to 104 possible.
* WHERE...Harney County.
* WHEN...For the Heat Advisory, from 10 AM Tuesday to 11 PM PDT
Thursday. For the Excessive Heat Watch, from Thursday evening
through Sunday evening.
* 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 105-110, hottest in the lower
elevations near the Snake River. For the Excessive Heat Watch,
dangerously hot conditions with temperatures up to 103 possible.
* WHERE...Baker County.
* WHEN...For the Excessive Heat Warning, from 10 AM Tuesday to
11 PM PDT Wednesday. For the Excessive Heat Watch, from
Thursday evening through Sunday evening.
* 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 105-110 expected. For the
Excessive Heat Watch, dangerously hot conditions with
temperatures up to 106 possible.
* WHERE...Portions of southwest and west central Idaho and
southeast Oregon.
* WHEN...For the Excessive Heat Warning, from 11 AM MDT /10 AM
PDT/ Tuesday to midnight MDT /11 PM PDT/ Thursday night. For
the Excessive Heat Watch, from late Thursday night through
Sunday evening.
* 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 105-110 expected. For the
Excessive Heat Watch, dangerously hot conditions with
temperatures up to 106 possible.
* WHERE...Oregon Lower Treasure Valley.
* WHEN...For the Excessive Heat Warning, from 2 PM Monday to
midnight MDT Thursday night. For the Excessive Heat Watch,
from late Thursday night through Sunday evening.
* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.
* WHAT...For the Heat Advisory, temperatures up to 100-103
expected. For the Excessive Heat Watch, dangerously hot
conditions with temperatures up to 104 possible.
* WHERE...Harney County.
* WHEN...For the Heat Advisory, from 10 AM Tuesday to 11 PM PDT
Thursday. For the Excessive Heat Watch, from Thursday evening
through Sunday evening.
* 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 105-110, hottest in the lower
elevations near the Snake River. For the Excessive Heat Watch,
dangerously hot conditions with temperatures up to 103 possible.
* WHERE...Baker County.
* WHEN...For the Excessive Heat Warning, from 10 AM Tuesday to
11 PM PDT Wednesday. For the Excessive Heat Watch, from
Thursday evening through Sunday evening.
* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.
* WHAT...Hot conditions during the day for the valleys. Highs will
be in the 90s except near 100 in Stehekin. Overnight lows will be
in 50s to low 60s.
* WHERE...Stehekin, Holden Village, and Stevens Pass.
* WHEN...Until 10 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Dangerously hot conditions during the day with little
relief overnight. Highs 95 to 105 Monday, 100 to 108 Tuesday and
Wednesday. Overnight lows will be in 60s to mid 70s.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...Until 10 PM PDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat.
* WHAT...Dangerously hot conditions during the day for the valleys.
Highs 95 to 103. Overnight lows will be in 50s to low 60s.
* WHERE...Priest River, Orin-Rice Road, Wallace, Osburn, Pinehurst,
Flowery Trail Road, Dobson Pass, Lookout Pass, Chesaw Road,
Eastport, St. Maries, Highway 20 Wauconda Summit, Newport,
Fruitland, Tiger, Inchelium, Metaline Falls, Northport, Wauconda,
Colville, Kellogg, Kettle Falls, Ione, Fourth Of July Pass,
Bonners Ferry, Fernwood, Deer Park, Sherman Pass, Schweitzer
Mountain Road, Mullan, Springdale-Hunters Road, Sandpoint,
Metaline, Republic, Clark Fork, Boulder Creek Road, Chewelah, and
Athol.
* WHEN...Until 10 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
...HOT, DRY, UNSTABLE CONDITIONS ALONG THE EAST SLOPES OF THE
CASCADES MONDAY AND TUESDAY...
The National Weather Service in Spokane has issued a Red Flag
Warning for unstable thermal trough, which is in effect from noon
Monday to 11 PM PDT Tuesday.
* Affected Area: Fire Weather Zone 696 East Washington Central
Cascades (Zone 696), Fire Weather Zone 697 East Portion of North
Cascades National Park/Lake Chelan National Recreation Area
(Zone 697) and Fire Weather Zone 698 East Washington North
Cascades (Zone 698).
* Timing: 12 PM PDT Monday through 11 PM PDT Tuesday
* Relative Humidities: Minimum values 8 to 16 percent in the
valleys and 14 to 23 percent over the higher terrain. Poor
overnight humidity recovery.
* Temperatures: High temperatures 100 to 108 in the valleys, 80s
and 90s in the mountains.
* Impacts: Hot, dry, and unstable conditions will lead to the
potential for rapid fire growth on any new or existing fires.
* WHAT...Dangerously hot conditions with temperatures between 100
and 105 degrees expected. Overnight temperatures will be slow to
cool off each evening, only falling below 70 degrees for a short
period each night, if at all depending on your location. The warm
nighttime temperatures will limit chances to recover from the
heat, exacerbating the risk of heat-related illness during this
prolonged heat wave.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...Until 10 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...The most intense portion of this heat wave
has not yet occurred. The hottest temperatures are expected Monday
and Tuesday, with Monday night being the warmest night.
* WHAT...Afternoon temperatures in the upper 80s to middle 90s
expected. A few spots could reach close to 100 degrees, mainly the
lower valleys located towards the Willamette Valley.
* WHERE...In Oregon, North Oregon Cascades, Cascades of Lane County,
and Cascades of Marion and Linn Counties. In Washington, South
Washington Cascades.
* WHEN...Until 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Dangerously hot conditions with temperatures between 100
and 105 degrees expected. Overnight temperatures will be slow to
cool off each evening, only falling below 70 degrees for a short
period each night, if at all depending on your location. The warm
nighttime temperatures will limit chances to recover from the
heat, exacerbating the risk of heat-related illness during this
prolonged heat wave.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...Until 10 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...The most intense portion of this heat wave
has not yet occurred. The hottest temperatures are expected Monday
and Tuesday, with Monday night being the warmest night.