* 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...Until 8 PM PDT Monday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Dangerously hot conditions with maximum temperatures
100-104 Saturday, increasing to 105-110 by Wednesday.
* WHERE...Portions of southwest Idaho and northeast and
southeast Oregon.
* WHEN...From Saturday afternoon through Wednesday afternoon.
* 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. Afternoon
high temperatures of 90 to 105 degrees. Morning low temperatures
in the mid-50s to mid-60s.
* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.
* WHEN...From noon Friday to 10 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...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.
Afternoon high temperatures of 95 to 110 degrees. Morning low
temperatures in the lower 60s to lower 70s.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Thursday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...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. Afternoon
temperatures of 95 to 110 degrees. Morning low temperatures in
the mid-50s to upper 60s.
* WHERE...Central Oregon and John Day Basin.
* WHEN...From noon Friday to 10 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Moderate to Major HeatRisk (risk of
heat-related impacts) is anticipated through the duration of the
event.
* WHAT...Hot temperatures with modest overnight relief. Afternoon
high temperatures of 95 to 110 degrees. Morning low temperatures
in the mid-50s to lower 70s.
* WHERE...Wallowa County.
* WHEN...From noon Monday to 10 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses.
* ADDITIONAL DETAILS...Hottest temperatures will be in the canyons
of Wallowa County, especially Hells Canyon. Temperatures will be
comparatively cooler in Wallowa Valley. Moderate to locally
Extreme HeatRisk (risk of heat-related impacts) is anticipated
through the duration of the event.
* WHAT...Dangerously hot conditions with little overnight relief.
Afternoon high temperatures of 95 to 110 degrees. Morning low
temperatures in the lower 60s to lower 70s.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...From noon Friday to 10 PM PDT Thursday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Major to locally Extreme HeatRisk (risk of
heat-related impacts) is anticipated through the duration of the
event.
* WHAT...High temperatures of 95 to 100 degrees with lows in the
upper 50's expected over multiple days.
* WHERE...In California, Modoc County and northeast Siskiyou County.
This includes the cities of Macdoel and Alturas. In Oregon, Lake
County and eastern Klamath County. This includes the cities of
Klamath Falls, Chemult, Summer Lake, and Lakeview
* WHEN...Until 9 PM PDT Monday.
* IMPACTS...Hot temperatures may cause heat illnesses. Area rivers
will be cold and can cause shock to swimmers.
* ADDITIONAL DETAILS...This will be a long-duration heatwave with
temperatures lingering through at least Monday.
* WHAT...High temperatures between 105 to 110 with low temperatures
in the mid to upper 60's expected over multiple days.
* WHERE...Central Douglas County and Eastern Douglas County
Foothills. This includes the cities of Roseburg, Toketee Falls,
Sutherlin.
* WHEN...Until 9 PM PDT Monday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, particularly for those working or
participating in outdoor activities. Area rivers will be cold and
can cause shock to swimmers.
* ADDITIONAL DETAILS...This will be a multi day heat wave with the
warmest temperatures on Friday and Saturday.
* WHAT...Dangerously hot conditions with high temperatures of 110 to
115 and low temperatures in the upper 60s expected over multiple
days.
* WHERE...In California, western and central Siskiyou County. This
includes the cities of Yreka, Weed, Etna, and Happy Camp. 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 Monday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, particularly for those working or
participating in outdoor activities. Area rivers will be cold and
can cause shock to swimmers.
* ADDITIONAL DETAILS...This will be a multi day heat wave with the
warmest temperatures on Friday and Saturday. The Medford Airport
has a 47% chance to tie or exceed the all time temperature record
of 115.
* WHAT...After very warm overnight lows this morning in the 70s.
Temperatures of 95 to 100 degrees are expected.
* WHERE...Portions of the Curry County Coast from Brookings to
Pistol River and the Chetco basin.
* WHEN...Until 10 PM PDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS...The thermal trough will begin to move inland
later today and temperatures will decrease somewhat and become
more reasonable Friday into the Weekend at the coast.
* 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 today to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Afternoon temperatures in the upper 80s to middle 90s
expected. 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 today 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 today to 11 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* WHAT...Afternoon temperatures in the upper 80s to middle 90s
expected. 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 today to 11 PM PDT Sunday.
* IMPACTS...Hot temperatures 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...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 in the upper 70s and 80s
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.
...DRY AND BREEZY CONDITIONS FRIDAY AFTERNOON...
.A weak weather system Friday will produce gusty winds and low
relative humidity in the Cascade gaps and Waterville Plateau.
The National Weather Service in Spokane has issued a Fire Weather
Watch for wind and low relative humidity, which is in effect from
Friday afternoon through Friday evening.
* Affected Area: Fire Weather Zone 705 Foothills of Central
Washington Cascades (Zone 705) and Fire Weather Zone 706
Waterville Plateau (Zone 706).
* Winds: West 15 to 25 mph with gusts up to 30 mph.
* Relative Humidities: 12 to 20 percent.
* Impacts: Any new or existing fires will have the potential to
spread rapidly.
...DRY AND BREEZY CONDITIONS FRIDAY...
.Breezy winds will develop through the Kittitas valley Friday and
will coincide with very low relative humidities in the afternoon.
The National Weather Service in Pendleton has issued a Fire
Weather Watch for wind and low relative humidity, which is in
effect from Friday afternoon through Friday evening.
* AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley.
* WINDS...West 15 to 20 mph.
* RELATIVE HUMIDITY...As low as 12 percent.
* IMPACTS...Breezy conditions combined with low RHs will result
in rapid fire spread and extreme fire behavior.
* WHAT...Dangerously hot conditions with little overnight relief.
Highs in the 90s to middle 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 Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
* ADDITIONAL DETAILS...Persistent Major to locally Extreme HeatRisk
(risk of heat-related impacts) is anticipated through the duration
of the event.