* WHAT...Hot temperatures with modest overnight relief. Afternoon
high temperatures of 90 to 105 degrees, highest in lower valleys
and canyons. Overnight low temperatures in the mid 50s to upper
60s, lowest in high valleys.
* WHERE...Blue Mountains of Oregon and Washington, Grande Ronde
Valley, and Wallowa County.
* WHEN...From noon today to 10 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat-related illnesses.
* ADDITIONAL DETAILS...Hottest temperatures during this
long-duration heatwave are expected Tuesday and Wednesday.
* WHAT...Hot temperatures with modest overnight relief. Afternoon
high temperatures of 90 to 105 degrees, highest along the East
Slopes of the Oregon Cascades. Overnight low temperatures in the
low 50s to upper 60s, lowest in valleys.
* WHERE...In Oregon, East Slopes of the Oregon Cascades. In
Washington, Upper Slopes of the Eastern Washington Cascades Crest.
* WHEN...From noon today to 10 PM PDT Tuesday.
* IMPACTS...Hot temperatures may cause heat-related illnesses.
* ADDITIONAL DETAILS...Hottest temperatures during this
long-duration heatwave are expected Tuesday.
...DRY AND BREEZY CONDITIONS WEDNESDAY...
.Breezy winds will develop through the Cascade gaps and into
portions of the Columbia Basin Wednesday and will coincide with
low relative humidities in the afternoon and evening.
The National Weather Service in Pendleton has issued a Fire
Weather Watch for wind and low relative humidity, which is in
effect from Wednesday afternoon through Wednesday evening.
* AFFECTED AREA...Fire Weather Zones 641 Lower Columbia Basin of
Oregon, 690 Kittitas Valley and 691 Lower Columbia Basin.
* WINDS...West 15 to 25 mph with gusts up to 35 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...High temperatures of 100 to 110 with low temperatures in
the mid to upper 60s expected.
* WHERE...Central Douglas County and Eastern Douglas County
Foothills. This includes the cities of Roseburg, Toketee Falls,
and Sutherlin.
* WHEN...Until 9 PM PDT Tuesday.
* 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.
* 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...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...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.
* IMPACTS...Any fires that develop will likely spread rapidly.
* AFFECTED AREA...Fire weather zones 280...616, 617, 620, 621,
622, 623 & 624. This includes much of western Siskiyou
County, Douglas County, northern and central Josephine
County, Jackson County, most of Klamath County and western
Lake County.
* WIND...Northwest 10 to 15 mph with gusts as high as 25 mph.
* HUMIDITY...7 to 15 percent.
* DETAILED URL...View the hazard area in detail at
https://www.wrh.noaa.gov/map/?wfo=mfr
* WHAT...Dangerously hot conditions with limited overnight relief.
Afternoon high temperatures of 95 to 110 degrees. Overnight low
temperatures in the mid-50s to lower 70s.
* WHERE...Central Oregon and John Day Basin.
* WHEN...Until 10 PM PDT Wednesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Hottest temperatures during this
long-duration heatwave are expected Tuesday.
* WHAT...Hot temperatures with modest overnight relief. Afternoon
high temperatures of 90 to 105 degrees, highest in lower valleys
and canyons. Overnight low temperatures in the low 50s to upper
60s, lowest in high valleys.
* WHERE...Blue Mountains of Oregon and Washington, Grande Ronde
Valley, and Wallowa County.
* WHEN...From noon Monday to 10 PM PDT Wednesday.
* IMPACTS...Hot temperatures may cause heat-related illnesses.
* ADDITIONAL DETAILS...Hottest temperatures during this
long-duration heatwave are expected Tuesday and Wednesday.
* WHAT...Dangerously hot conditions with limited overnight relief.
Afternoon high temperatures of 95 to 110 degrees. Overnight low
temperatures in the upper 50s to mid-70s.
* WHERE...Portions of north central and northeast Oregon and
central, south central, and southeast Washington.
* WHEN...Until 10 PM PDT Wednesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Hottest temperatures during this
long-duration heatwave are expected Tuesday.
