Red Flag Warning
Issued by NWS Los Angeles, CA

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WWUS86 KLOX 170150
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING IN EFFECT UNTIL 10 PM PST THIS EVENING FOR
THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST DUE TO GUSTY
NORTH TO NORTHEAST WINDS AND LOW RELATIVE HUMIDITY...

...RED FLAG WARNING IN EFFECT FOR MUCH OF LOS ANGELES AND VENTURA
COUNTIES TONIGHT THROUGH SUNDAY EVENING...

.DISCUSSION...Strong upper level winds behind the passage of an
upper level disturbance combined with strengthening north-south
pressure gradients caused a significant increase in winds across
the Santa Barbara county mountains and south coast this morning,
causing major impacts on the Thomas Fire. Wind gusts of 35 to
50 mph were common this morning across these areas, with isolated
gusts up to 65 mph observed in the Montecito Hills. While
humidities have modified somewhat today, the strong north to
northeast winds through this evening will continue to maintain
dangerous Red Flag conditions for the Santa Barbara county
mountains and south coast. As a result of these strong winds,
there will be very rapid fire spread, long range spotting, and
extreme fire behavior observed at the Thomas Fire and any new
fire ignitions. In addition, there will be gusty north winds
across the Ventura county mountains today, especially near the
Highway 33 and Interstate 5 corridors which will impact the
Ventura county portion of the Thomas Fire.

For the remainder of Ventura and Los Angeles Counties, the Santa
Ana winds are expected to begin this evening, then peak overnight
into Sunday when gusts between 35 and 55 mph will be likely. A
Red Flag Warning is in effect for tonight through Sunday evening
for much of Los Angeles and Ventura Counties.

CAZ246-253-254-170600-
/O.CON.KLOX.FW.W.0011.171217T0500Z-171218T0400Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
8 PM PST SUNDAY FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...Northeast winds increasing this evening, peaking
  overnight into Sunday morning at 25 to 40 mph with gusts to 55
  mph. Isolated gusts to 60 mph possible.

* Relative Humidity...Humidities 15 to 25 percent tonight,
  lowering to 10 to 15 percent on Sunday.

* Impacts...There will be the potential for very rapid spread of
  wildfire, long range spotting, and extreme fire behavior that
  could lead to a threat to life and property. Use extreme
  caution with potential fire ignition sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$

CAZ244-245-288-170600-
/O.CON.KLOX.FW.W.0011.171217T0500Z-171218T0400Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
8 PM PST SUNDAY FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY FOR THE VENTURA COUNTY VALLEYS AND SANTA CLARITA
VALLEY...

* Winds...Northeast winds are expected to increase this evening
  peaking overnight into Sunday morning at 20 to 30 mph with
  gusts to 50 mph.

* Relative Humidity...Humidities 15 to 25 percent tonight,
  lowering to 10 to 15 percent on Sunday.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire, long range spotting, and
  extreme fire behavior that could lead to a threat to life and
  property. Use extreme caution with potential fire ignition
  sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$

CAZ547-170600-
/O.CON.KLOX.FW.W.0011.171217T0500Z-171218T0400Z/
Los Angeles County San Fernando Valley-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
8 PM PST SUNDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW
RELATIVE HUMIDITY FOR THE SAN FERNANDO VALLEY...

* Winds...North to northeast winds are expected to increase this
  evening, peaking overnight into Sunday morning at 15 to 30 mph
  with gusts to 45 mph. Strongest winds northern and western
  portions.

* Relative Humidity...Humidities 15 to 25 percent tonight,
  lowering to 10 to 15 percent on Sunday.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire, long range spotting, and
  extreme fire behavior that could lead to a threat to life and
  property. Use extreme caution with potential fire ignition
  sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$

CAZ252-170600-
/O.CON.KLOX.FW.W.0010.000000T0000Z-171217T0600Z/
Santa Barbara County Mountains-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS
EVENING FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY FOR THE SANTA BARBARA COUNTY MOUNTAINS AND ADJACENT
FOOTHILLS...

* Winds...Areas of north to northeast winds 20 to 30 mph with
  gusts to 45 mph in the mountains and adjacent foothills.
  Isolated gusts to 55 mph possible.

* Relative Humidity...Minimum values 15 to 25 percent.

* Impacts...There will be the potential for very rapid spread of
  wildfire, long range spotting, and extreme fire behavior that
  could lead to a threat to life and property. Use extreme
  caution with potential fire ignition sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are occurring. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources. This is a dangerous situation, please follow evacuation
orders.

&&

$$

CAZ240-241-170600-
/O.CON.KLOX.FW.W.0011.171217T0900Z-171218T0400Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 1 AM TO 8 PM PST
SUNDAY FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR
THE VENTURA COAST AND LOS ANGELES COAST FROM MALIBU TO HOLLYWOOD
HILLS...

* Winds...North to northeast winds are expected to increase this
  evening peaking overnight into Sunday morning at 15 to 30 mph
  with gusts 35 to 45 mph. Strongest winds across the Ventura
  county coastal plain and Malibu to Hollywood Hills.

* Relative Humidity...Humidities 15 to 25 percent tonight,
  lowering to 10 to 15 percent on Sunday.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire, long range spotting, and
  extreme fire behavior that could lead to a threat to life and
  property. Use extreme caution with potential fire ignition
  sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of strong winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$

CAZ239-170600-
/O.CON.KLOX.FW.W.0010.000000T0000Z-171217T0600Z/
Santa Barbara County South Coast-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS
EVENING FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY...

* Winds...Areas of north to northeast winds 15 to 25 mph with
  gusts to 35 mph below passes and canyons. Isolated gusts to 45
  mph in the foothills. Strongest winds Santa Barbara eastward.

* Relative Humidity...Minimum values 15 to 25 percent.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire, long range spotting, and
  extreme fire behavior that could lead to a threat to life and
  property. Use extreme caution with potential fire ignition
  sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of gusty winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources. This is a dangerous situation, please follow evacuation
orders.

&&

$$

CAZ548-170600-
/O.CON.KLOX.FW.W.0010.171217T0500Z-171218T0400Z/
Los Angeles County San Gabriel Valley-
550 PM PST Sat Dec 16 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
8 PM PST SUNDAY FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY FOR THE FOOTHILLS OF THE SAN GABRIEL VALLEY...

* Winds...Areas of northeast winds 15 to 25 mph with gusts to 35
  mph in the foothills.

* Relative Humidity...Humidities 15 to 25 percent tonight,
  lowering to 10 to 15 percent on Sunday.

* Impacts...If fire ignition occurs, there will be the potential
  for very rapid spread of wildfire, long range spotting, and
  extreme fire behavior that could lead to a threat to life and
  property. Use extreme caution with potential fire ignition
  sources.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are expected. A combination of gusty winds...low relative
humidity...and warm temperatures can contribute to extreme fire
behavior. Use extreme caution when using potential fire ignition
sources.

&&

$$
Gomberg/Smith


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