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Wind Advisory

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
332 AM PST Thu Dec 14 2017

...Gusty Santa Ana winds returning today...

.Gusty Santa Ana winds are expected to return to portions of Los
Angeles and Ventura counties this morning as surface high
pressure builds over the Great Basin and good upper level support
to enhance wind gusts. The strongest winds will be mid morning
into the early afternoon when gusts up to 55 mph are possible in
the mountains. Winds are expected to diminish some this evening
but remain gusty through Friday morning, especially in the
mountains. Winds could be delayed a few hours in the valleys and
coastal areas this morning due to a pesky marine layer.

CAZ041-142000-
/O.CON.KLOX.WI.Y.0077.171214T1400Z-171214T2300Z/
Los Angeles County Coast including Downtown Los Angeles-
Including the cities of Malibu, Santa Monica, Beverly Hills,
Hollywood, and Long Beach
332 AM PST Thu Dec 14 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS
AFTERNOON...

* WINDS...From Malibu to the Hollywood Hills, northeast 15 to 25
  mph with gusts to 40 mph this morning into early afternoon.

* IMPACTS...Gusty winds will make driving difficult, especially
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

When driving, use extra caution. Be prepared for sudden gusty
cross winds.

&&

$$



Red Flag Warning

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.

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



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
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