* WHAT...Dangerously hot conditions with maximum temperatures up
to 100-104 on Saturday gradually warming up to 105-110 by
Wednesday.
* WHERE...Portions of southwest Idaho and northeast and
southeast Oregon.
* WHEN...From Saturday afternoon through Wednesday afternoon, the
end of the forecast valid period. The dangerous heat will likely
continue past the current Watch period.
* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.
* ADDITIONAL DETAILS...Multiple daily max temperature records are
being threatened by this heatwave. The longevity of the event
makes this a particularly dangerous heat wave.
* WHAT...Hot temperatures with modest overnight relief. Highs in the
90s to lower 100s. Morning lows in the upper 50s to middle 60s.
* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Persistent Moderate to Major HeatRisk (risk
of heat-related impacts) is anticipated through the duration of
the event.
* WHAT...Dangerously hot conditions with little overnight relief.
Highs in the 90s to lower 100s. Morning lows in the middle and
upper 60s.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Persistent Major to locally Extreme HeatRisk
(risk of heat-related impacts) is anticipated through the duration
of the event.
* WHAT...Hot temperatures with modest overnight relief. Highs in the
90s to lower 100s. Morning lows in the upper 50s to middle 60s.
* WHERE...Central Oregon and John Day Basin.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Persistent Moderate to Major HeatRisk (risk
of heat-related impacts) is anticipated through the duration of
the event.
* WHAT...Dangerously hot conditions with little overnight relief.
Highs in the 90s to lower 100s. Morning lows in the middle and
upper 60s.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Persistent Major to locally Extreme HeatRisk
(risk of heat-related impacts) is anticipated through the duration
of the event.
* WHAT...Dangerously hot conditions with little relief overnight
expected. Highs in the 90s to low 100s. Morning lows in the mid to
upper 60s.
* WHERE...Portions of north central and northeast Oregon as well as
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Sunday, Monday, and Tuesday are forecast to
be the hottest days with Major to locally Extreme HeatRisk (risk
of heat-related impacts).
* WHAT...Hot temperatures with modest relief overnight expected.
Highs in the 90s to low 100s. Morning lows in the upper 50s to mid
60s.
* WHERE...Central Oregon and the John Day Basin.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Saturday, Sunday, and Monday are forecast to
be the hottest days with Moderate to Major HeatRisk (risk of
heat-related impacts).
* WHAT...Dangerously hot conditions with little relief overnight
expected. Highs in the 90s to low 100s. Morning lows in the mid to
upper 60s.
* WHERE...Portions of north central and northeast Oregon as well as
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Tuesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Sunday, Monday, and Tuesday are forecast to
be the hottest days with Major to locally Extreme HeatRisk (risk
of heat-related impacts).
* WHAT...Dangerously hot conditions during the day for the valleys.
Highs will be in the 90s. Overnight lows will be in 50s to low 60s.
* WHERE...Bonners Ferry, Metaline Falls, Athol, Sandpoint,
Pinehurst, Newport, Clark Fork, Osburn, Ione, Republic, Boulder
Creek Road, Fruitland, Colville, Deer Park, Schweitzer Mountain
Road, Wallace, Northport, Priest River, Kettle Falls, Mullan,
Orin-Rice Road, Tiger, Metaline, Fernwood, Inchelium, Highway 20
Wauconda Summit, Chesaw Road, Eastport, Dobson Pass, Sherman Pass,
Fourth Of July Pass, Chewelah, Wauconda, Lookout Pass, Flowery
Trail Road, Kellogg, Springdale-Hunters Road, and St. Maries.
* WHEN...From noon Sunday to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* WHAT...Dangerously hot conditions during the day with little
relief overnight possible. Highs will be in the 90s to 100s.
Overnight lows will be in 60s to low 70s.
* WHERE...Portions of North and North Central Idaho and Central,
East Central, North Central, Northeast, and Southeast Washington.
* WHEN...From noon Saturday to 10 PM PDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat.
* WHAT...Dangerously hot conditions during the day for the valleys.
Highs will be in the 90s. Overnight lows will be in 50s to low 60s.
* WHERE...Stehekin, Holden Village, and Stevens Pass.
* WHEN...From noon Saturday to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* WHAT...Hot conditions with temperatures in the upper 80s and 90s
expected. This will pose a moderate to major risk of heat-related
illness.
* WHERE...Portions of northwest and west central Washington.
* WHEN...From noon Friday to 10 PM PDT Monday.
* IMPACTS...This level of 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 remain well above normal
next week with only gradual cooling expected.
* WHAT...Hot conditions with temperatures in the upper 70s and 80s
expected near the coast. Temperatures in the upper 80s and 90s
away from the coast. This will pose a moderate risk of
heat-related illness.
* WHERE...Central Coast, North Coast, and Western Strait of Juan De
Fuca.
* WHEN...From noon Friday to 10 PM PDT Sunday.
* 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...Marine air may move into coastal areas Sunday
and Monday providing relief. However, well above-normal
temperatures will persist inland well into next week.
* WHAT...Dangerously hot conditions with temperatures 100 to 105
expected. Overnight temperatures will also be very warm and limit
chances to recover from the heat, with lows ranging from the mid
60s to low 70s.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Afternoon temperatures will be in the upper 80s to middle
90s, though a few spots could reach close to 100 deg in spots,
mainly those lower valleys that are located near 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...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* WHAT...Dangerously hot conditions with temperatures 100 to 105
expected. Overnight temperatures will also be very warm and limit
chances to recover from the heat, with lows ranging from the mid
60s to low 70s.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Afternoon temperatures will be in the upper 80s to middle
90s, though a few spots could reach close to 100 deg in spots,
mainly those lower valleys that are located near 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...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
Patchy dense fog has been observed by spotters and traffic webcams
near Newport, Sandpoint, and Priest Lake. Visibilities will drop
as low as a quarter of a mile at times. Slow down, increase
following distance, and use low beam headlights in dense fog.
* WHAT...Dangerously hot conditions with temperatures 100 to 105
expected. Overnight temperatures will also be very warm and limit
chances to recover from the heat, with lows ranging from the mid
60s to low 70s.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...There is a 25-35 percent chance that
temperatures will exceed 110 degrees on Saturday, and a 10-15
percent chance that temperatures will exceed 110 degrees Friday
and Sunday.
* WHAT...Dangerously hot conditions with temperatures 100 to 105
expected. Overnight temperatures will also be very warm and limit
chances to recover from the heat, with lows ranging from the mid
60s to low 70s.
* WHERE...Portions of northwest and west central Oregon and
southwest Washington.
* WHEN...From noon Thursday to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...There is a 25-35 percent chance that
temperatures will exceed 110 degrees on Saturday, and a 10-15
percent chance that temperatures will exceed 110 degrees Friday
and Sunday.