KORSHERW145

...Critical Fire Weather expected Saturday...

.Low Relative Humidity and Windy conditions will create critical
fire weather conditions across the Yakima Valley the Columbia
Basin of Oregon, Eastern Columbia River Gorge, and the Mountains
of Central Oregon.

* AFFECTED AREA...Fire Weather Zones 691 Lower Columbia Basin of
Oregon, 691 Lower Columbia Basin of Washington and 700 Central
Mountains of Oregon.

* TIMING...From 3 PM to 8 PM PDT Saturday.

* WINDS...West 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 9 percent.

* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

...Scattered dry and wet thunderstorms develop on Friday...

.An upper level low will inject elevated moisture to the region
by Friday morning. Storms will track towards the north through
the day. A mix of dry and wet storms will provide abundant
lightning to the region through Friday evening.

* IMPACTS...Abundant lightning on dry fuels will likely create
new ignitions across the region. Any fires that develop could
spread rapidly. Numerous new fire starts could overwhelm
initial attack.

* AFFECTED AREA...Fire weather zones 624 and 625, covering most
of Klamath and Lake Counties. The southern portions of the
zones near the California border have the highest chances of
seeing abundant lightning.

* THUNDERSTORMS...Moving northeast around 20 to 25 mph. Storm
mode will be a mix of dry and wet thunderstorms.

* OUTFLOW WINDS...Gusts up to 35 mph.

* DETAILED URL...View the hazard area in detail at
https://weather.gov/wrh/hazards?wfo=mfr

Follow all fire restrictions. You can find your county's
emergency sign up form as well as links to fire restrictions at
weather.gov/medford/wildfire. One less spark, one less wildfire.

Be sure you're signed up for your county's emergency alert
system. Familiarize yourself with your emergency plan and make
sure you listen to emergency services. Visit ready.gov/plan for
more information.

A Red Flag Warning is issued when we identify weather conditions
that promote rapid spread of fire which may become life-
threatening. This does not mean there is a fire. These conditions
are either occurring now or will begin soon. It is important to
have multiple ways to receive information from authorities.

...RED FLAG WARNING FOR LIGHTNING...

.An upper trough from the Pacific is forecast into southeast
Oregon this afternoon, and southwest Idaho tonight into Saturday.
The trough will bring a 20 to 40 percent chance of thunderstorms
with potential for new fire starts due to lightning. Initial
storms may be dry with strong gusty outflow winds, especially in
southeast Oregon, but storms overnight through Saturday will
gradually trend wetter as they spread into Idaho.

* AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM
and 672 Southern Grasslands.

* TIMING...From 1 PM this afternoon to 5 AM PDT Saturday.

* THUNDERSTORMS...Scattered coverage with abundant lightning.

* OUTFLOW WINDS...Gusty erratic winds up to 50 mph.

* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will occur shortly.

* WHAT...Dangerously hot conditions with temperatures up to 98
degrees possible. This will pose a major risk of heat-related
illness.

* WHERE...Eastern Columbia River Gorge of Oregon and Washington.

* WHEN...From Monday morning through Tuesday evening.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an
air-conditioned room, stay out of the sun, and check up on relatives
and neighbors.

Young children and pets should never be left unattended in vehicles
under any circumstances. This is especially true during warm or hot
weather when car interiors can reach lethal temperatures in a matter
of minutes.