Red Flag Warning
Issued by NWS Los Angeles, CA

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WWUS86 KLOX 132259
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
259 PM PST Wed Dec 13 2017

...RED FLAG WARNINGS IN EFFECT FOR MUCH OF LOS ANGELES AND
VENTURA COUNTIES THROUGH FRIDAY MORNING DUE TO GUSTY NORTHEAST
WINDS AND LOW HUMIDITIES...

.DISCUSSION...The extended period of offshore flow will continue
into Friday morning...focused over Los Angeles and Ventura
Counties. Light offshore winds and single digit humidities will
continue across interior sections of Los Angeles and Ventura
counties through tonight. Strengthening offshore winds are
expected Thursday into Thursday night, when gusts between 35 and
55 mph can be expected, resulting in the potential for very rapid
fire spread, long range spotting, and extreme fire behavior. The
humidities will remain incredibly dry with extremely poor
overnight recoveries nearly everywhere. This will result in
continued critical fire weather conditions into Friday
morning, especially Thursday and Thursday night when the winds
peak.

The Santa Barbara County Mountains could experience near critical
conditions Thursday afternoon into Thursday night with gusts
up to 25 mph combined with single digit humidities. In addition,
the air mass will be fairly unstable above the Thomas Fire today,
resulting in a greater risk for large fire plumes which will
locally enhance winds near the fire and cause erratic fire
behavior.

CAZ253-254-141800-
/O.CON.KLOX.FW.W.0009.000000T0000Z-171215T1800Z/
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
259 PM PST Wed Dec 13 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR
GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY OVER THE LOS
ANGELES AND VENTURA COUNTY MOUNTAINS...

* Winds...Northeast 10 to 25 mph with gusts to 35 mph,
  increasing to 20 to 35 mph with gusts to 55 mph Thursday into
  Thursday night.

* Relative Humidity...Daily minimum 2 to 6 percent today
  becoming 5 to 10 percent on Thursday. Very poor overnight
  recovery.

* 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 and low relative
humidity can contribute to extreme fire behavior. Use extreme
caution when using potential fire ignition sources. This is a
dangerous situation, please follow evacuation orders.

&&

$$

CAZ244>246-288-141800-
/O.CON.KLOX.FW.W.0009.000000T0000Z-171215T1800Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Monica Mountains Recreational Area-Santa Clarita Valley-
259 PM PST Wed Dec 13 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR
GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY OVER THE VENTURA
VALLEYS, THE SANTA CLARITA VALLEY, AND THE SANTA MONICA
MOUNTAINS...

* Winds...Northeast winds increasing to 20 to 35 mph with gusts
  40 to 50 mph Thursday into Thursday night.

* Relative Humidity...Daily minimum 2 to 6 percent today
  becoming 3 to 10 percent on Thursday. Very poor overnight
  recovery.

* 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 and low relative
humidity can contribute to extreme fire behavior. Use extreme
caution when using potential fire ignition sources. This is a
dangerous situation, please follow evacuation orders.

&&

$$

CAZ547-141800-
/O.CON.KLOX.FW.W.0009.171214T1200Z-171215T1800Z/
Los Angeles County San Fernando Valley-
259 PM PST Wed Dec 13 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 4 AM THURSDAY TO 10 AM
PST FRIDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE
HUMIDITY FOR THE SAN FERNANDO VALLEY...

* Winds...North to northeast 15 to 30 mph with gusts to 45 mph
  Thursday into Friday morning...strongest northern and western
  portions.

* Relative Humidity...Minimum 3 to 8 percent with very poor
  overnight recovery.

* 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
will be occurring shortly. A combination of strong winds...low
relative humidity...and warm temperatures can contribute to
extreme fire behavior.

&&

$$

CAZ240-241-141800-
/O.CON.KLOX.FW.W.0009.171214T1400Z-171215T1800Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
259 PM PST Wed Dec 13 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM THURSDAY TO 10 AM
PST FRIDAY FOR GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY
FOR THE VENTURA COAST AND LOS ANGELES COAST FROM MALIBU TO
HOLLYWOOD HILLS...

* Winds...Northeast 15 to 25 mph with gusts to 40 mph Thursday
  into Friday morning...except 20 to 30 mph with gusts to 45 mph
  across the eastern portions of the Ventura county coastal
  plain.

* Relative Humidity...Minimum 3 to 10 percent with very poor
  overnight recovery.

* 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
will be occurring shortly. A combination of strong winds...low
relative humidity...and warm temperatures can contribute to
extreme fire behavior.

&&

$$

Gomberg/Kittell



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