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Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
157 PM PST Fri Dec 15 2017

...RED FLAG WARNING IN EFFECT FROM 2 AM TO 10 PM PST SATURDAY FOR
THE SANTA BARBARA COUNTY MOUNTAINS AND ADJACENT FOOTHILLS OF THE
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 LATE SATURDAY NIGHT THROUGH SUNDAY EVENING...

.DISCUSSION...After the passage of an upper level disturbance,
there will be increasing upper level wind support and cold air
advection that will bring strengthening north to northeast winds
across the mountains and adjacent coastal foothills of Santa
Barbara county (including the Thomas Fire) late tonight through
Saturday evening, with gusts of 30 to 40 mph being common. Due to
the stronger winds in the upper atmosphere, there is the potential
for locally stronger gusts across exposed ridgetops on Saturday.
The combination of these gusty winds with humidities generally
ranging between 10 to 20 percent will result in critical Red Flag
conditions across the Santa Barbara County mountains and adjacent
coastal foothills, mainly east of Santa Barbara. As a result,
there will be an increased threat of very rapid fire spread, long
range spotting, and extreme fire behavior across the warning area,
including portions of the Thomas Fire incident.

For the remainder of Ventura and Los Angeles Counties, the flow
is expected to shift to the northeast by Saturday evening, with a
threat of increased Santa Ana winds and low humidities late
Saturday night into Sunday when gusts between 35 and 55 mph will
be likely. A Red Flag Warning is in effect for late Saturday night
through Sunday evening for much of Los Angeles and Ventura
Counties.


CAZ240-241-161800-
/O.NEW.KLOX.FW.W.0011.171217T1400Z-171218T0400Z/
Ventura County Coast-
Los Angeles County Coast including Downtown Los Angeles-
157 PM PST Fri Dec 15 2017

...RED FLAG WARNING IN EFFECT FROM 6 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...

The National Weather Service in Los Angeles/Oxnard has issued a
Red Flag Warning for gusty north to northeast winds and low
relative humidity, which is in effect from 6 AM to 8 PM PST
Sunday.

* Winds...Northeast winds are expected to peak late Saturday night
  into Sunday morning at 15 to 25 mph with gusts 35 to 45 mph.

* Relative Humidity...Humidities above 15 percent will be possible
  late Saturday night, but are expected to lower 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.

&&

$$



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