Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
1257 PM MDT Thu Jun 18 2026
...RED FLAG WARNING FOR LIGHTNING...
.An upper trough from the Pacific is forecast to move into
southeast Oregon beginning Friday afternoon, then across
southwest Idaho Friday night into Saturday. The trough will bring
a 30 to 60 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.
ORZ670-672-191500-
/O.UPG.KBOI.FW.A.0004.260619T2000Z-260620T1200Z/
/O.NEW.KBOI.FW.W.0006.260619T2000Z-260620T1200Z/
Burns BLM-Southern Grasslands-
1157 AM PDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 1 PM FRIDAY TO 5 AM PDT
SATURDAY FOR LIGHTNING FOR BURNS BLM AND SOUTHERN GRASSLANDS...
WHICH ARE FIRE WEATHER ZONES 670 AND 672...
The National Weather Service in Boise has issued a Red Flag
Warning for lightning, which is in effect from 1 PM Friday to
5 AM PDT Saturday. The Fire Weather Watch is no longer in effect.
* AFFECTED AREA...In Oregon, Fire Weather Zones 670 Burns BLM
and 672 Southern Grasslands.
* TIMING...From 1 PM Friday 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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will occur shortly.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Boise ID
1257 PM MDT Thu Jun 18 2026
...RED FLAG WARNING FOR LIGHTNING...
.An upper trough from the Pacific is forecast to move into
southeast Oregon beginning Friday afternoon, then across
southwest Idaho Friday night into Saturday. The trough will bring
a 30 to 60 percent chance of thunderstorms with potential for new
fire starts due to lightning. Initial storms may be dry with
strong gusty outflow winds, especially in southeast Oregon, but
storms overnight through Saturday will gradually trend wetter as
they spread into Idaho.
IDZ423-426-191500-
/O.UPG.KBOI.FW.A.0004.260620T0000Z-260620T1800Z/
/O.NEW.KBOI.FW.W.0006.260620T0000Z-260620T1800Z/
Owyhee Mountains-Southern Highlands-
1257 PM MDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 6 PM FRIDAY TO NOON MDT
SATURDAY FOR LIGHTNING FOR OWYHEE MOUNTAINS AND SOUTHERN
HIGHLANDS...WHICH ARE FIRE WEATHER ZONES 423 AND 426...
The National Weather Service in Boise has issued a Red Flag
Warning for lightning, which is in effect from 6 PM Friday to
noon MDT Saturday. The Fire Weather Watch is no longer in effect.
* AFFECTED AREA...In Idaho, Fire Weather Zones 423 Owyhee
Mountains and 426 Southern Highlands.
* TIMING...From 6 PM Friday to noon MDT Saturday.
* THUNDERSTORMS...Scattered coverage with abundant lightning.
* OUTFLOW WINDS...Gusty erratic winds up to 45 mph.
* IMPACTS...Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will occur shortly.
&&
$$
L
URGENT - FIRE WEATHER MESSAGE
National Weather Service Reno NV
149 PM PDT Thu Jun 18 2026
CAZ270-278-NVZ458-192000-
/O.UPG.KREV.FW.A.0003.260619T1500Z-260620T0600Z/
/O.NEW.KREV.FW.W.0004.260619T1500Z-260620T0600Z/
Surprise Valley California-Eastern Lassen County-
Northern Washoe County-
149 PM PDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 8 AM TO 11 PM PDT FRIDAY FOR
THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR THE SURPRISE VALLEY,
EASTERN LASSEN AND NORTHERN WASHOE COUNTIES...
The National Weather Service in Reno has issued a Red Flag
Warning for thunderstorms and strong outflow winds, which is in
effect from 8 AM to 11 PM PDT Friday. The Fire Weather Watch is
no longer in effect.
* CHANGES...The Fire Weather Watch has been upgraded to a Red
Flag Warning.
* Affected Area...Fire Weather Zone 270 Surprise Valley
California, Fire Weather Zone 278 Eastern Lassen County, Fire
Weather Zone 458 Northern Washoe County.
* Thunderstorms...Isolated dry lightning will be possible Friday
morning before thunderstorm coverage increases Friday afternoon.
* Outflow Winds...Gusty and erratic thunderstorm outflow winds,
even well away from rain cores. Gusts to around 50 mph
possible.
* Impacts...Lightning can create new fire starts and may combine
with strong outflow winds to cause a fire to rapidly grow in
size and intensity before first responders can contain them.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Avoid outdoor activities that can cause a spark near dry
vegetation, such as yard work, target shooting, or campfires.
Follow local fire restrictions. Check weather.gov/reno for
updates and livingwithfire.info for preparedness tips.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Elko NV
105 PM PDT Thu Jun 18 2026
NVZ424-437-438-469-470-190415-
/O.UPG.KLKN.FW.A.0004.260619T2100Z-260620T0600Z/
/O.NEW.KLKN.FW.W.0004.260619T2100Z-260620T0600Z/
Southeastern Humboldt County and northern Lander County-
Humboldt County-Quinn-
W Elko County, N Eureka and Lander Counties N of I80-
Central Elko County-Eastern Elko County-
105 PM PDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 2 PM TO 11 PM PDT FRIDAY FOR
ISOLATED TO SCATTERED DRY THUNDERSTORMS FOR FIRE WEATHER ZONES
424, 437, 438, 469, AND 470...
The National Weather Service in Elko has issued a Red Flag
Warning, which is in effect from 2 PM to 11 PM PDT Friday. The
Fire Weather Watch is no longer in effect.
* THUNDERSTORMS...Isolated to scattered dry thunderstorms.
* WIND...Erratic wind gusts around 50 mph in and near dry
thunderstorms.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
1251 PM PDT Thu Jun 18 2026
...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.
ORZ624-625-190800-
/O.UPG.KMFR.FW.A.0001.260619T2000Z-260620T0800Z/
/O.NEW.KMFR.FW.W.0003.260619T2000Z-260620T0800Z/
Klamath Basin and the Fremont-Winema National Forest-
South Central Oregon Desert including the BLM Land in Eastern
Lake and Western Harney Counties-
1251 PM PDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 1 PM FRIDAY TO 1 AM PDT
SATURDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER
ZONES 624 AND 625...
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 1 PM Friday to 1 AM PDT
Saturday. The Fire Weather Watch is no longer in effect.
* 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
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
1251 PM PDT Thu Jun 18 2026
...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.
CAZ280-281-284-285-190800-
/O.UPG.KMFR.FW.A.0001.260619T1100Z-260620T0200Z/
/O.NEW.KMFR.FW.W.0003.260619T1500Z-260620T0200Z/
Western Klamath National Forest-
Central Siskiyou County Including Shasta Valley-
Siskiyou County from the Cascade Mountains East and South to Mt
Shasta-Modoc County Except for the Surprise Valley-
1251 PM PDT Thu Jun 18 2026
...RED FLAG WARNING IN EFFECT FROM 8 AM TO 7 PM PDT FRIDAY FOR
ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 280, 281,
284, AND 285...
The National Weather Service in Medford has issued a Red Flag
Warning, which is in effect from 8 AM to 7 PM PDT Friday. The
Fire Weather Watch is no longer in effect.
* 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 280,281,284 and 285 in
California. The majority of Siskiyou and Modoc Counties.
* THUNDERSTORMS...Moving north 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
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
$$
