Alert archive / Oregon / Red Flag Warnings in 2021

Red Flag Warning 25, NWS Medford, OR

July 18, 2021Klamath County, Lake County, Oregon; Modoc County, California

NWS Medford, OR issued this red flag warning at Jul 18, 2021, 12:57 PM PDT for Klamath County, Lake County, Oregon; Modoc County, California. It took effect at Jul 19, 2021, 2:00 PM PDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 18, 2021, 12:57 PM PDT (19:57 UTC)
In effect from
Jul 19, 2021, 2:00 PM PDT
Expired
Jul 19, 2021, 8:00 PM PDT
In force
6 hr
Issued by
NWS Medford, OR

Counties Modoc County, CA, Klamath County, OR, Lake County, OR

The radar

The Medford radar (KMAX), 151 km from the middle of the area, began a volume at 20:03 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 8.0 hours before the alert went out and 154 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 2021-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2021-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1397 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

825 
WWUS86 KMFR 181957
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
1257 PM PDT Sun Jul 18 2021

ORZ624-190800-
/O.UPG.KMFR.FW.A.0019.210719T2100Z-210720T0300Z/
/O.NEW.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.NEW.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
/O.CON.KMFR.FW.W.0024.210718T2100Z-210719T0300Z/
Klamath Basin and the Fremont-Winema National Forest-
1257 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624 AND
HAINES INDEX OF 6 OVER THE BOOTLEG FIRE...

...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR
STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624...

...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER
ZONE 624...

The National Weather Service in Medford has issued a Red Flag
Warning...which is in effect from 2 PM to 8 PM PDT Monday. A Fire
Weather Watch has also been issued and is in effect from Tuesday 
afternoon through Tuesday evening. 

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires. In addition, very dry
  and unstable conditions will support extreme fire behavior today.
  Plume dominated fire behavior is possible with locally-generated
  erratic and gusty winds. Spotting could be problematic.

* Affected area: In South Central OR...Southeastern Fire Weather 
  Zone 624, including the Bootleg Fire, the communities of Bly and 
  Bonanza. The Fire Weather Watch for Monday affects similar areas,
  with the addition of Lakeview and Valley Falls..

* Wind: Southwest 10 to 20 mph with gusts up to 35 mph.

* Humidity: As low as 8 percent today. 10 to 15 percent on Monday.

* Haines Index: 6 (High) this afternoon.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD 

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$

CAZ285-190800-
/O.NEW.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.NEW.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
/O.CON.KMFR.FW.W.0024.210718T2100Z-210719T0300Z/
Modoc County Except for the Surprise Valley-
1257 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285...

...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR
STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285...

...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER
ZONE 285...

The National Weather Service in Medford has issued a Red Flag
Warning...which is in effect from 2 PM to 8 PM PDT Monday. A Fire
Weather Watch has also been issued and is in effect from Tuesday 
afternoon through Tuesday evening.

* Impacts: Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires. 

* Affected area: In Northern CA...Most of Fire Weather Zone 285. 
  This includes the communities of Alturas, Canby, Adin, and Likely.

* Wind: Southwest 10 to 20 mph with gusts up to 30 mph.

* Humidity: As low as 8 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD 

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$

CAZ284-190300-
/O.CON.KMFR.FW.W.0024.210718T2100Z-210719T0300Z/
Siskiyou County from the Cascade Mountains East and South to Mt
Shasta-
1257 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 284...

* Impacts: Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: In Northern CA...Most of Fire Weather Zone 284,
  including the Lava and Tennant Fires. This also includes the
  communities of Macdoel, Tennant, and Tulelake.

* Wind: Southwest 15 to 25 mph with gusts up to 35 mph.

* Humidity: As low as 9 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$

CAZ281-282-190300-
/O.CON.KMFR.FW.W.0024.210718T2100Z-210719T0300Z/
Central Siskiyou County Including Shasta Valley-Shasta-
Trinity National Forest in Siskiyou County-
1257 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 281 AND
282...

* Impacts: Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: In Northern CA...Fire Weather Zones 281 and 282.
  This includes the Shasta Valley from Grenada southward, including
  the communities of Weed, Mt Shasta City, Dunsmuir, and McCloud. 

* Wind: South 10 to 20 mph with gusts up to 30 mph.

* Humidity: As low as 10 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$


Visit us at www.weather.gov/Medford
4 follow-up statements
476 
WWUS86 KMFR 190250
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
750 PM PDT Sun Jul 18 2021

ORZ624-192215-
/O.EXP.KMFR.FW.W.0024.000000T0000Z-210719T0300Z/
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.CON.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
Klamath Basin and the Fremont-Winema National Forest-
750 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY
   FOR STRONG GUSTY WIND WITH LOW RH...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
   THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH... 
...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG
   GUSTY WIND WITH LOW RH AND HAINES INDEX OF 6 OVER THE BOOTLEG
   FIRE...

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: 
  In South Central OR...Southeastern Fire Weather Zone 624, 
  including the Bootleg Fire, and the communities of Bly, Bonanza,
  Lakeview, and Valley Falls.

* Wind: West 10 to 20 mph with gusts up to 35 mph.

* Humidity: 10 to 15 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

&&

$$

CAZ285-192215-
/O.EXP.KMFR.FW.W.0024.000000T0000Z-210719T0300Z/
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.CON.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
Modoc County Except for the Surprise Valley-
750 PM PDT Sun Jul 18 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY
   FOR STRONG GUSTY WIND WITH LOW RH...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
   THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH...
...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
   STRONG GUSTY WIND WITH LOW RH...

* Impacts:  Strong, gusty wind with low relative humidity and 
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: 
  In Northern CA...Most of Fire Weather Zone 285. This includes
  the communities of Alturas, Canby, Adin, and Likely.

* Wind: Southwest 10 to 20 mph with gusts up to 30 mph.

* Humidity: 10 to 15 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

&&

$$

CAZ284-190400-
/O.EXP.KMFR.FW.W.0024.000000T0000Z-210719T0300Z/
Siskiyou County from the Cascade Mountains East and South to Mt
Shasta-
750 PM PDT Sun Jul 18 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
   STRONG GUSTY WIND WITH LOW RH...

While humidities will remain low, winds are not expected to be
strong enough to create critical conditions Monday.

$$

CAZ281-282-190400-
/O.EXP.KMFR.FW.W.0024.000000T0000Z-210719T0300Z/
Central Siskiyou County Including Shasta Valley-Shasta-
Trinity National Forest in Siskiyou County-
750 PM PDT Sun Jul 18 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
   STRONG GUSTY WIND WITH LOW RH...

While humidities will remain low, winds are not expected to be
strong enough to create critical conditions Monday.

$$

Visit us at www.weather.gov/Medford
795 
WWUS86 KMFR 191126
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
426 AM PDT Mon Jul 19 2021

ORZ624-200000-
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.CON.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
Klamath Basin and the Fremont-Winema National Forest-
426 AM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
   8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE 
   WEATHER ZONE 624... 
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON 
   THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR 
   FIRE WEATHER ZONE 624...

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: 
  In South Central OR...Southeastern Fire Weather Zone 624, 
  including the Bootleg Fire, and the communities of Bly, Bonanza,
  Lakeview, and Valley Falls.

* Wind: West 10 to 20 mph with gusts up to 30 mph.

* Humidity: 10 to 15 percent.

* View the hazard area in detail at:
https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

$$

CAZ285-200000-
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
/O.CON.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
Modoc County Except for the Surprise Valley-
426 AM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
   8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE
   WEATHER ZONE 285...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
   THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE
   WEATHER ZONE 285...

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: 
  In Northern CA...Most of Fire Weather Zone 285. This includes
  the communities of Alturas, Canby, Adin, and Likely.

* Wind: Southwest 10 to 20 mph with gusts up to 30 mph.

* Humidity: 9 to 15 percent.

* View the hazard area in detail at:
https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

$$


Visit us at www.weather.gov/Medford
951 
WWUS86 KMFR 192015
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
115 PM PDT Mon Jul 19 2021

ORZ624-200815-
/O.UPG.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
/O.NEW.KMFR.FW.W.0026.210720T2100Z-210721T0300Z/
/O.NEW.KMFR.FW.A.0021.210721T2100Z-210722T0300Z/
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
Klamath Basin and the Fremont-Winema National Forest-
115 PM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624...
...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT TUESDAY FOR
STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624...
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE
WEATHER ZONE 624...

The National Weather Service in Medford has issued a Red Flag
Warning...which is in effect from 2 PM to 8 PM PDT Tuesday. A Fire
Weather Watch has also been issued and is in effect from Wednesday
afternoon through Wednesday evening. 

* Impacts: Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread 
  potential of any new and existing fires.

* Affected area: In South Central OR...Southeastern Fire Weather
  Zone 624, including the Bootleg Fire, and the communities of Bly,
  Bonanza, Lakeview, and Valley Falls.

* Wind: Southwest to west 10 to 20 mph with gusts up to 30 mph.

* Humidity: As low as 11 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD 

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$

CAZ285-200815-
/O.UPG.KMFR.FW.A.0020.210720T2100Z-210721T0400Z/
/O.NEW.KMFR.FW.W.0026.210720T2100Z-210721T0300Z/
/O.NEW.KMFR.FW.A.0021.210721T2100Z-210722T0300Z/
/O.CON.KMFR.FW.W.0025.210719T2100Z-210720T0300Z/
Modoc County Except for the Surprise Valley-
115 PM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285...
...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT TUESDAY FOR
STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285...
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE
WEATHER ZONE 285...

The National Weather Service in Medford has issued a Red Flag
Warning...which is in effect from 2 PM to 8 PM PDT Tuesday. A Fire
Weather Watch has also been issued. This Fire Weather Watch is in
effect from Wednesday afternoon through Wednesday evening. The
Fire Weather Watch is no longer in effect.

* Impacts: Strong, gusty wind with low relative humidity and critically
  dry vegetation will greatly increase the spread potential of any
  new and existing fires.

* Affected area: In Northern CA...Most of Fire Weather Zone 285.
  This includes the communities of Alturas, Canby, Adin, and
  Likely.

* Wind: Southwest 10 to 20 mph with gusts up to 30 mph.

* Humidity: As low as 9 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD 

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

&&

$$


Visit us at www.weather.gov/Medford
526 
WWUS86 KMFR 200250
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
750 PM PDT Mon Jul 19 2021

ORZ624-202200-
/O.EXP.KMFR.FW.W.0025.000000T0000Z-210720T0300Z/
/O.CON.KMFR.FW.W.0026.210720T2100Z-210721T0300Z/
/O.CON.KMFR.FW.A.0021.210721T2100Z-210722T0300Z/
Klamath Basin and the Fremont-Winema National Forest-
750 PM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT
   TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE
   624...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
   THROUGH WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR
   FIRE WEATHER ZONE 624...
...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
   STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624...

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: In South Central OR...Southeastern Fire Weather 
  Zone 624, including the Bootleg Fire, and the communities of Bly,
  Bonanza, Lakeview, and Valley Falls.

* Wind: Southwest to west 10 to 20 mph with gusts up to 30 mph.

* Humidity: 9 to 15 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

&&

$$

CAZ285-202200-
/O.EXP.KMFR.FW.W.0025.000000T0000Z-210720T0300Z/
/O.CON.KMFR.FW.W.0026.210720T2100Z-210721T0300Z/
/O.CON.KMFR.FW.A.0021.210721T2100Z-210722T0300Z/
Modoc County Except for the Surprise Valley-
750 PM PDT Mon Jul 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT
   TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE
   285...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
   THROUGH WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR
   FIRE WEATHER ZONE 285...
...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
   STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285...

* Impacts:  Strong, gusty wind with low relative humidity and
  critically dry vegetation will greatly increase the spread
  potential of any new and existing fires.

* Affected area: In Northern CA...Most of Fire Weather Zone 285. 
  This includes the communities of Alturas, Canby, Adin, and 
  Likely.

* Wind: Southwest 10 to 20 mph with gusts up to 30 mph.

* Humidity: 9 to 15 percent.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

Precautionary/preparedness actions...

Avoid tossing burning cigarettes on the ground, parking hot
vehicles on dry vegetation, and using equipment that can cause
sparks. Follow all fire restrictions. Find links to restrictions
at weather.gov/medford/wildfire. One less spark, one less
wildfire.

Gather your fire evacuation kit now. Collect essentials you don't
want to lose and prioritize your checklist. Visit ready.gov/kit
for more information.

Familiarize yourself with your evacuation plan. Where will you go?
How will you get there? Who will you call to let others know your
are safe? Visit ready.gov/wildfires for more information.

A Red Flag Warning does not mean there is a fire. It means that
critical fire weather conditions are either occurring now or will
shortly. These conditions promote rapid spread of fire which may
become life threatening. Evacuate if ordered to, or if a fire
threatens.

A Fire Weather Watch means that critical fire weather conditions
are possible during the valid watch time. These conditions could
promote the rapid spread of wildfires which could become life-
threatening. Check weather.gov/medford for forecast updates and a
possible upgrade of the this watch to a Red Flag Warning.

&&

$$

Visit us at www.weather.gov/Medford

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 4:01 AM PDTFire Weather WatchMFRKlamath, Lake9 hr
Jul 18, 12:57 PM PDTFire Weather WatchMFRKlamath, Lake24 hr

Nearby

Red Flag Warnings in Oregon, 2021Red Flag Warnings in California, 2021Every red flag warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.