Alert archive / California / Red Flag Warnings in 2017

Red Flag Warning 5, NWS Los Angeles, CA

October 5, 2017Los Angeles County, California

NWS Los Angeles, CA issued this red flag warning at Oct 5, 2017, 9:36 AM PDT for Los Angeles County, California. It took effect at Oct 6, 2017, 6:00 AM PDT. It was in force for 14 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
Oct 5, 2017, 9:36 AM PDT (16:36 UTC)
In effect from
Oct 6, 2017, 6:00 AM PDT
Expired
Oct 6, 2017, 8:00 PM PDT
In force
14 hr
Issued by
NWS Los Angeles, CA

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 16:35 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

Edwards AFB, CA (KEDW), launched 12:00Z, 4.6 hours before the alert went out and 89 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, Edwards AFB, CA at 12:00Z on 2017-10-05Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Edwards AFB, CA at 12:00Z on 2017-10-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939587897Sfc1 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
2816 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

375 
WWUS86 KLOX 051636
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
936 AM PDT Thu Oct 5 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR GUSTY
WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA
COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY...

.Warm and very dry conditions will combine with gusty offshore
winds to create elevated fire weather danger through Saturday. 
A Red Flag Warning is in effect on Friday for the areas where the
winds are the strongest for the longest duration, which include 
the Los Angeles and Ventura County mountains as well as the Santa 
Clarita Valley. There is a chance that the warning may need to be 
expanded into the Santa Monica Mountains...and extended into 
Saturday. 

CAZ253-254-288-060045-
/O.NEW.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
936 AM PDT Thu Oct 5 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND 
VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN
EFFECT from 6 AM to 8 PM PDT Friday.

* Winds...Northeast 15 to 25 mph with gusts to 40 mph...strongest
  late Friday morning and afternoon.

* Relative Humidity...Minimum of 6 to 12 percent.

* Impacts...If fire ignition occurs, conditions are favorable for
  extreme fire behavior which would threaten life and property.
  Use extreme caution when using potential fire ignition sources.

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.

&&

$$

Kittell
5 follow-up statements
128 
WWUS86 KLOX 052219
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
319 PM PDT Thu Oct 5 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND
VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY...

.Warm and very dry conditions will combine with gusty offshore
winds to create elevated fire weather danger through Saturday. A
Red Flag Warning is in effect on Friday for the areas where the
winds are the strongest for the longest duration, which include
the Los Angeles and Ventura County mountains as well as the Santa
Clarita Valley. There is a chance that the warning may need to be
expanded into the Santa Monica Mountains...and extended into
Saturday.

CAZ253-254-288-061700-
/O.CON.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
319 PM PDT Thu Oct 5 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM TO 8 PM PDT
FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS
ANGELES AND VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA
VALLEY...

* Winds...Northeast 15 to 25 mph with gusts to 40 mph. Strongest  
  late Friday morning and afternoon.

* Relative Humidity...Minimum of 6 to 12 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

Kittell
330 
WWUS86 KLOX 060721
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1221 AM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS 
ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS 
WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY...

.Warm and very dry conditions will combine with gusty offshore
winds to create elevated fire weather danger through Saturday. A
Red Flag Warning is in effect today for the areas where the winds
are the strongest for the longest duration, which include the Los
Angeles and Ventura County mountains including the Santa Monica 
Range as well as the Ventura County Valleys and the Santa Clarita
Valley. 

CAZ246-061530-
/O.EXA.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/
Santa Monica Mountains Recreational Area-
1221 AM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA 
MOUNTAINS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN
EFFECT from 6 AM to 8 PM PDT this evening.

* Winds...Northeast 15 to 25 mph with gusts up to 40 mph. Isolated
  gusts to 45 mph. Winds will be strongest across the northern 
  portion from Malibu to the Ventura County border. Winds should 
  taper off a litter earlier in the afternoon then the inland 
  mountains, but relative humidities will be below 10 percent by 
  this afternoon.
 
* Relative Humidity...as low as 8 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

CAZ244-245-061530-
/O.EXA.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
1221 AM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY 
VALLEYS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN
EFFECT from 6 AM to 8 PM PDT this evening.

* Winds...Below passes and canyons...northeast 15 to 25 mph with
  gusts up to 30 mph. Local gusts to 40 mph in the hills. Winds
  will be strongest across the eastern portion of the valleys. 

* Relative Humidity...as low as 8 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

CAZ253-254-288-061530-
/O.CON.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
1221 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM TO 8 PM PDT
THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS 
ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA 
VALLEY...

* Winds...northeast 15 to 25 mph with gusts up to 40 mph. Local gusts
  to 45 mph in the mountains. 

* Relative Humidity...as low as 7 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

Kaplan/Kittell
523 
WWUS86 KLOX 061300
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
600 AM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS 
ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS 
WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY...

.Warm and very dry conditions will combine with gusty offshore
winds to create elevated fire weather danger through Saturday. A
Red Flag Warning is in effect today for the areas where the winds
are the strongest for the longest duration, which include the Los
Angeles and Ventura County mountains including the Santa Monica
Range as well as the Ventura County Valleys and the Santa Clarita
Valley.

CAZ253-254-288-062100-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
600 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND 
VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY...

* Winds...northeast 15 to 25 mph with gusts up to 40 mph. Local gusts
  to 45 mph in the mountains. 

* Relative Humidity...as low as 7 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

CAZ246-062100-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Santa Monica Mountains Recreational Area-
600 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA 
MOUNTAINS...

* Winds...Northeast 15 to 25 mph with gusts up to 40 mph. Isolated
  gusts to 45 mph. Winds will be strongest across the northern
  portion from Malibu to the Ventura County border. Winds should
  taper off a litter earlier in the afternoon compared to the
  inland mountains. 
 
* Relative Humidity...as low as 8 percent.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

CAZ244-245-062100-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
600 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY 
VALLEYS...

* Winds...Below passes and canyons...northeast 15 to 25 mph with
  gusts up to 30 mph. Local gusts to 40 mph in the hills. Winds
  will be strongest across the eastern portion of the valleys. 

* Relative Humidity...as low as 8 percent. 

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

&&

$$

Kaplan/Kittell
322 
WWUS86 KLOX 061620
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
920 AM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS
ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS
WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF 
LOS ANGELES AND VENTURA EXCEPT THE ANTELOPE VALLEY...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN 
LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO 
COUNTY MOUNTAINS...

.Warm and very dry conditions will combine with gusty offshore
winds to create elevated fire weather danger through Saturday. A
Red Flag Warning is in effect today for the areas where the winds
are the strongest for the longest duration, which include the Los
Angeles and Ventura County mountains including the Santa Monica
Range as well as the Ventura County Valleys and the Santa Clarita
Valley. A stronger offshore event is expected between Monday 
morning and Tuesday morning with stronger winds expected with 
critically dry conditions continuing.

CAZ253-254-288-070030-
/O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
920 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND
VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS 
ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA 
VALLEY...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS
IN EFFECT from early Monday morning through Tuesday morning.

* Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph
  will continue through this evening. Local gusts to 45 mph in the
  mountains. A stronger offshore event is expected between Monday
  morning and Tuesday morning. Northeast winds could potentially
  increase 20 to 35 mph with gusts up to 50 mph on Monday and
  linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ246-070030-
/O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Santa Monica Mountains Recreational Area-
920 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA
MOUNTAINS...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA 
MONICA MOUNTAINS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS
IN EFFECT from early Monday morning through Tuesday morning.

* Winds...Northeast 15 to 25 mph with gusts up to 40 mph will
  continue through this evening. Isolated gusts to 45 mph. Winds
  will be strongest across the northern portion from Malibu to the
  Ventura County border. Winds should taper off a litter earlier
  in the afternoon compared to the inland mountains. A stronger
  offshore event is expected between Monday morning and Tuesday
  morning. Northeast winds could potentially increase 20 to 35 
  mph with gusts up to 50 mph on Monday and linger into Tuesday 
  morning.

* Relative Humidity...Humidities will fall to 7-15 percent today
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ244-245-070030-
/O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
920 AM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY
VALLEYS...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR VENTURA 
COUNTY VALLEYS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS
IN EFFECT from early Monday morning through Tuesday morning.

* Winds...Below passes and canyons...northeast 15 to 25 mph with
  gusts up to 30 mph will continue through this evening. Local 
  gusts to 40 mph in the hills. Winds will be strongest across the
  eastern portion of the valleys. A stronger offshore event is 
  expected between Monday morning and Tuesday morning. Northeast 
  winds could potentially increase 20 to 35 mph with gusts up to 
  50 mph on Monday and linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ240-241-547-548-070030-
/O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
Los Angeles County San Fernando Valley-
Los Angeles County San Gabriel Valley-
920 AM PDT Fri Oct 6 2017

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS
IN EFFECT from early Monday morning through Tuesday morning.

* Winds...A moderate to strong offshore event is expected between
  Monday morning and Tuesday morning. Northeast winds could
  potentially increase 20 to 35 mph with gusts up to 50 mph on
  Monday and linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable for
  extreme fire behavior which would threaten life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ237-238-251-070030-
/O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T0300Z/
San Luis Obispo County Interior Valleys-Cuyama Valley-
San Luis Obispo County Mountains / Los Padres National Forest-
920 AM PDT Fri Oct 6 2017

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN 
LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO 
COUNTY MOUNTAINS...

THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a
Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS
IN EFFECT from early Monday morning through Monday evening.

* Winds...A moderate offshore event is expected between Monday
  morning and Tuesday morning. East winds could potentially
  increase 15 to 25 mph with gusts up to 40 mph on Monday and
  linger through Monday evening.

* Relative Humidity...Humidities will fall to 7-15 percent today
  through this evening and likely again Monday morning through
  Monday evening.

* Impacts...If fire ignition occurs, conditions are favorable for
  extreme fire behavior which would threaten life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

Hall
211 
WWUS86 KLOX 061955
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1255 PM PDT Fri Oct 6 2017

...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS
ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS
WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF
LOS ANGELES AND VENTURA EXCEPT THE ANTELOPE VALLEY...

...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH
MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN
LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO
COUNTY MOUNTAINS...

.An offshore flow pattern will linger into Saturday keeping a warm
and very dry weather pattern in place. Low relative humidities 
will combine with marginally gusty offshore winds to create 
elevated fire weather danger through Saturday. The flow pattern 
will shift to onshore flow over the weekend but then quickly 
reverse back to offshore flow through Monday. A moderate offshore
event is forecast between Monday morning and Tuesday morning.
Gusty offshore winds will combine with dry conditions and fuels in
place to likely bring critical fire weather conditions to portions
of Southwest California with near critical fire weather conditions
elsewhere.

CAZ253-254-288-070300-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
/O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
Santa Clarita Valley-
1255 PM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND
VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING
THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR 
THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA 
CLARITA VALLEY...

* Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph
  will continue through this afternoon then slowly diminish
  through this evening. Local gusts to 45 mph are possible in the
  mountains. A stronger offshore event is expected between Monday
  morning and Tuesday morning. Northeast winds will likely 
  increase to 20 to 35 mph with gusts up to 50 mph on Monday and 
  linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today 
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ246-070300-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
/O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
Santa Monica Mountains Recreational Area-
1255 PM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA
MOUNTAINS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING
THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR 
THE SANTA MONICA MOUNTAINS...

* Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph
  will continue through this afternoon then slowly diminish
  through this evening. Isolated gusts to 45 mph are possible.
  Winds will be strongest across the northern portion from Malibu
  to the Ventura County border. A stronger offshore event is
  expected between Monday morning and Tuesday morning. Northeast
  winds will likely increase to 20 to 35 mph with gusts up to 50
  mph on Monday and linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today 
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ244-245-070300-
/O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/
/O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
1255 PM PDT Fri Oct 6 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY
VALLEYS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING
THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE
VENTURA COUNTY VALLEYS...

* Winds...Below passes and canyons...northeast winds 15 to 25 mph
  with gusts up to 30 mph will continue through this afternoon
  then slowly diminish this evening. Local gusts up to 40 mph are
  possible in the hills. Winds will be strongest across the
  eastern portion of the valleys. A stronger offshore event is
  expected between Monday morning and Tuesday morning. Northeast
  winds will likely increase to 20 to 35 mph with gusts up to 50
  mph on Monday and linger into Tuesday morning.

* Relative Humidity...Humidities will fall to 7-15 percent today 
  through this evening and likely again Monday morning through 
  Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property. Use extreme caution when using potential fire 
  ignition sources.

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.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ240-241-547-548-070300-
/O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
Los Angeles County San Fernando Valley-
Los Angeles County San Gabriel Valley-
1255 PM PDT Fri Oct 6 2017

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING
THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE
VENTURA AND LOS ANGELES COUNTY AND THE LOS ANGELES COUNTY VALLEYS...

* Winds..A stronger offshore event is expected between Monday
  morning and Tuesday morning. Northeast winds will likely
  increase to 20 to 35 mph with gusts up to 50 mph on Monday and
  linger into Tuesday morning.

* Relative Humidity...Humidities will likely fall to 7-15 percent
  Monday morning through Tuesday morning.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

CAZ237-238-251-070300-
/O.CON.KLOX.FW.A.0004.171009T1200Z-171010T0300Z/
San Luis Obispo County Interior Valleys-Cuyama Valley-
San Luis Obispo County Mountains / Los Padres National Forest-
1255 PM PDT Fri Oct 6 2017

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING
THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR
INTERIOR SAN LUIS OBISPO COUNTY AND THE CUYAMA VALLEY...

* Winds...A moderate offshore event is expected between Monday
  morning and Monday evening. East winds will likely increase to 
  15 to 25 mph with gusts up to 40 mph on Monday and linger 
  through Monday evening.

* Relative Humidity...Humidities will likely fall to 7-15 percent
  Monday morning through Monday evening.

* Impacts...If fire ignition occurs, conditions are favorable 
  for extreme fire behavior which would threaten life and 
  property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$

Hall

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Los Angeles, CA wrote its last area forecast discussion before this red flag warning went out at Oct 5, 9:30 AM PDT, 6 minutes earlier.

Area forecast discussion, Oct 5, 9:30 AM PDT, 6 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
930 AM PDT Thu Oct 5 2017

.SYNOPSIS...
The offshore winds, gusty at times, should warm the temperatures
into Saturday with the skies mostly clear. The onshore flow will
increase the overnight marine layer into Sunday and drop the
temperatures. Breezy offshore winds should start a warming trend
from Tuesday to Wednesday. A low system will approach on Thursday.

&&

.SHORT TERM...(TDY-SAT)

Forecast on track for the next few days as offshore flow takes
over through Saturday. Temps already trending warmer today with
light offshore flow in place and sunny skies. The NAM was a
little weaker with the upper support Friday but still enough to
keep a wind advisory in the conversation. It would be marginal at
this point and leaning towards not issuing one with the afternoon
forecast. Gradients are a little stronger Saturday but upper
support peaks Friday morning so Friday should have the best chance
for advisory level winds if they occur. Forecast temps seem in
line with past events of this magnitude, mainly 80s to around 90
for the coastal areas Friday and a few degrees warmer Saturday.
Valleys well into the 90s to around 100.

.LONG TERM...(SUN-WED)

For the extended, 00Z models in good agreement on Sunday then
diverge noticeably Monday through Wednesday. On Sunday, both the
GFS and ECMWF drop an upper low into the Great Basin. This will
result in an increase in onshore flow as well as a noticeable
influx of cooler air. So, Sunday will be noticeably cooler for all
areas with some stratus likely Sunday morning across the Los
Angeles coastal plain.

For Monday through Wednesday, the forecast gets more muddled as
the model solutions diverge. The GFS keeps the upper low spinning
over the Great Basin Monday and Tuesday while the ECMWF pushes the
low eastward. However, both models indicate rather strong offshore
gradients (LAX-DAG gradients ranging generally between -3.0
and -5.0 MB) both Monday and Tuesday. The GFS solution indicates
much better upper level support than the ECMWF. So, basically the
GFS solution would be a moderate to locally strong Santa Ana while
the ECMWF would likely be a weak Santa Ana event. Hopefully, the
models will come into a better consensus for Monday and Tuesday.
For Wednesday, both models indicate rising H5 heights as ridge
builds overhead with weaker offshore flow. So, Wednesday should be
warmer for all areas with some sub- advisory northeasterly winds.

&&

.AVIATION...05/1145Z.

At 11Z, there was a weak surface based inversion at KLAX. The top
of the inversion was around 2500 feet with a temperature of 21C.

Clear skies across the region this morning, and VFR conditions are
expected across the entire areas through the period.

KLAX...High confidence in the 12Z TAF with VFR conditions
expected through the period.

KBUR...High confidence in the 12Z TAF with VFR conditions
expected through the period.

&&

.MARINE...05/900 AM.

For the Outer Waters, SCA winds are not expected until this
afternoon so the SCA has been delayed until then. There is a 30%
chance that the winds will reach SCA levels again late Fri
afternoon and evening, then are likely late Sat afternoon through
Sun evening, especially across the northern two thirds of the
outer waters.

For the Inner Waters, good confidence in current forecast. For
the waters north of Point Sal, there is a 20-30% chance of SCA
level winds this afternoon and evening. Winds are expected to
remain below SCA levels on Friday, but nay increase to SCA levels
Saturday afternoon and evening. For the waters south of Point
Conception, winds and seas are expected to remain below SCA levels
through Mon.

&&

.BEACHES...05/900 AM.

A fairly significant long period south swell will move into the
coastal waters later today and tonight, then persist through the
weekend. There is high confidence of strong rip currents and
elevated surf, especially on south facing beaches. Issued a Beach
Hazards Statement for Fri morning through Sun. There is a chance
that surf could reach High Surf Advisory levels on south facing
beaches late Fri through early Sun.

&&

.FIRE WEATHER...05/900 AM.

Offshore flow will peak Friday and Saturday, resulting in warm
(Highs generally 90 to 100 degrees) and very dry (minimum humidity
6 to 12 percent) conditions everywhere. Winds will peak on Friday
with gusts in the 25 to 40 mph range from the mountains and down
to the coast...focused over Los Angeles and Ventura Counties.

Widespread elevated fire weather danger will exist over all 4
counties through Saturday. A Red Flag Warning is in effect for the
most critical and longest duration areas which include the Los
Angeles and Ventura County Mountains and the Santa Clarita Valley.
Currently this warning is only for Friday, but it may need to be
extended through Saturday. Other wind prone areas will see brief
Red Flag conditions, but likely not for the 6+ hour durations
needed for a Warning. Please advise the public to be extremely
cautious with potential fire starting sources.

Another offshore event is expected for Monday and Tuesday, but
there is a lot of uncertainty as to the strength of it. As it
stands, there is a potential for a moderate-to-strong Santa Ana
with widespread Red Flag conditions.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect from late tonight through
      Sunday evening for zones 34-35-40-41-87. (See LAXCFWLOX).
     Red Flag Warning in effect from 6 AM to 8 PM PDT Friday for
      zones 253-254-288. (See LAXRFWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Friday for
      zones 670-673-676. (See LAXMWWLOX).

&&

.HAZARD POTENTIAL OUTLOOK...(SAT-WED)
Hot and dry weather is expected across the region Saturday. There
will be elevated fire danger during this time. Strong rip
currents are likely and high surf is possible at south and
southwest facing beaches through Sunday. Gusty Santa Ana winds are
possible next Monday and Tuesday.

&&

PUBLIC...MW/Thompson
AVIATION...DB
MARINE...Sweet
BEACHES...Sweet
FIRE...Kittell
SYNOPSIS...STu

weather.gov/losangeles

The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 5, 3:14 AM PDTSmall Craft AdvisoryLOX6 hr
Oct 5, 5:26 AM PDTBeach Hazards StatementLOXLos Angeles4 days
Oct 5, 8:57 AM PDTSmall Craft AdvisoryLOX18 hr

Nearby

Red Flag Warnings in California, 2017Every red flag warning in 2017

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.