Alert archive / California / Red Flag Warnings in 2021

Red Flag Warning 1, NWS Los Angeles, CA

January 13, 2021Los Angeles County, California

NWS Los Angeles, CA issued this red flag warning at Jan 13, 2021, 2:45 PM PST for Los Angeles County, California. It took effect at Jan 14, 2021, 4:00 PM PST. It was in force for 52 hr. 7 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jan 13, 2021, 2:45 PM PST (22:45 UTC)
In effect from
Jan 14, 2021, 4:00 PM PST
Expired
Jan 16, 2021, 8:00 PM PST
In force
52 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 22:48 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.

What was reported inside it

TimeReportWhereRemark
Jan 14, 11:16 PM PSTHIGH SUST WINDS 426 Nnw Santa Monica, CAMESONET STATION HP026 GREEN PEAK.
Jan 14, 11:23 PM PSTHIGH SUST WINDS 407 Ssw Woodland Hills, CAMESONET STATION DW2363 SADDLE PEAK.
Jan 15, 12:20 AM PSTNON-TSTM WND GST 572 Ne Point Dume, CAMESONET STATION SE037 ESCONDIDO CYN (SCE).
Jan 15, 1:53 AM PSTNON-TSTM WND GST 569 Se Acton, CAMESONET STATION MLCC1 MILL CREEK RAWS.
Jan 15, 2:53 AM PSTNON-TSTM WND GST 658 Nne Mount Wilson, CAMESONET STATION CHOC1 CHILAO RAWS.
Jan 15, 3:10 AM PSTNON-TSTM WND GST 809 Ne San Fernando, CAMESONET STATION SE678 MAGIC MTN TRUCK TRL (SCE).
Jan 15, 8:50 AM PSTNON-TSTM WND GST 661 Nnw Chatsworth, CAMESONET STATION SE712 BROWNS CYN (SCE).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 10.8 hours before the alert went out and 184 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, San Diego, CA at 12:00Z on 2021-01-13Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2021-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 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
3529 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

501 
WWUS86 KLOX 132245
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
245 PM PST Wed Jan 13 2021

...RED FLAG WARNING IN EFFECT LATE THURSDAY AFTERNOON THROUGH
FRIDAY AFTERNOON FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS
AND VALLEYS...

...FIRE WEATHER WATCH IN EFFECT FRIDAY NIGHT THROUGH SATURDAY 
MORNING FOR THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

.North to northeast winds will form over Los Angeles and Ventura
Counties on Thursday and continue through Friday, with dry air
descending over the region starting late THursday afternoon or
night. Along with persistently dry fuels, this combination of 
wind and humidity will result in critical fire weather conditions 
over the valleys and mountains of Los Angeles and Ventura Counties
Thursday afternoon through Friday afternoon, with a chance of 
needing to be extended into Saturday. There is also a chance that 
the coastal areas will need to be added. Gusty Sundowner winds and
dry air will affect Santa Barbara County Friday night into 
Saturday, with Red Flag conditions possible. 

CAZ246-253-254-141745-
/O.NEW.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
245 PM PST Wed Jan 13 2021

...RED FLAG WARNING IN EFFECT FROM 4 PM THURSDAY TO 4 PM PST
FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS OF LOS
ANGELES AND VENTURA COUNTIES...

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 4 PM Thursday to 4 PM PST Friday.

* Winds...North to northeast winds 15 to 30 mph with gusts to 50
  mph. Strongest Thursday night into Friday.

* Relative Humidity...As low as 5 to 10 percent. Poor overnight
  recoveries. 

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-141745-
/O.NEW.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
245 PM PST Wed Jan 13 2021

...RED FLAG WARNING IN EFFECT FROM 4 PM THURSDAY TO 4 PM PST
FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA VALLEYS,
SANTA CLARITA VALLEY, AND SAN FERNANDO 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 4 PM Thursday to 4 PM PST Friday.

* Winds...North to northeast winds 15 to 25 mph with gusts to 40
  mph. Isolated gusts to 50 mph. Strongest Thursday night into 
  Friday.

* Relative Humidity...As low as 5 to 10 percent. Poor overnight
  recoveries. 

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ239-252-141745-
/O.NEW.KLOX.FW.A.0001.210116T0200Z-210116T1800Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
245 PM PST Wed Jan 13 2021

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY EVENING THROUGH
SATURDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA
BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

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 Friday evening through Saturday morning.

* Winds...North to northeast winds 15 to 30 mph with gusts to 50
  mph possible. 

* Relative Humidity...As low as 8 to 15 percent. Poor overnight 
  recoveries. 

* 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.

&&

$$

Kittell
7 follow-up statements
013 
WWUS86 KLOX 141730
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
930 AM PST Thu Jan 14 2021

...RED FLAG WARNING IN EFFECT FROM 4 PM TODAY TO 4 PM FRIDAY 
FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS...

...FIRE WEATHER WATCH IN EFFECT FRIDAY NIGHT THROUGH SATURDAY
MORNING FOR THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

.North to northeast winds will continue over Los Angeles and 
Ventura Counties through Friday with dry air descending over the 
region starting later this afternoon or tonight. Along with 
persistently dry fuels, this combination of wind and humidity will
result in critical fire weather conditions over the valleys and 
mountains of Los Angeles and Ventura Counties this afternoon 
through Friday afternoon, with a chance of needing to be extended 
into Saturday. Gusty Sundowner winds and dry air will affect 
Santa Barbara County Friday night into Saturday, with Red Flag 
conditions possible.

CAZ246-253-254-150130-
/O.CON.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
930 AM PST Thu Jan 14 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO
4 PM PST FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE
MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...North to northeast winds 15 to 30 mph with gusts to 50
  mph. Strongest later tonight into Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in
  isolated areas, mainly on Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-150130-
/O.CON.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
930 AM PST Thu Jan 14 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO
4 PM PST FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE
VENTURA VALLEYS, SANTA CLARITA VALLEY, AND SAN FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 40
  mph. Isolated gusts to 50 mph. Strongest tonight into Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in
  isolated areas, mainly Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ239-252-150130-
/O.CON.KLOX.FW.A.0001.210116T0200Z-210116T1800Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
930 AM PST Thu Jan 14 2021

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR
THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

* Winds...North to northeast winds 15 to 30 mph with gusts to 50
  mph possible. Strongest in the Montecito Hills area.

* Relative Humidity...As low as 8 to 15 percent. Poor overnight 
  recoveries.

* 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.

&&

$$

MW
226 
WWUS86 KLOX 142247
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
247 PM PST Thu Jan 14 2021

...RED FLAG WARNING IN EFFECT FROM 4 PM TODAY TO 4 PM FRIDAY FOR
THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS...

...FIRE WEATHER WATCH IN EFFECT FRIDAY NIGHT THROUGH SATURDAY
MORNING FOR THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

.North to northeast winds will continue over Los Angeles and
Ventura Counties through Friday with decreasing humidities through
Friday. Along with persistently dry fuels, this combination of 
wind and humidity will result in critical fire weather conditions 
over the valleys and mountains of Los Angeles and Ventura
Counties. with a chance of needing to be extended into Saturday. 
Gusty Sundowner winds and dry air will affect Santa Barbara County
Friday night into Saturday, with Red Flag conditions possible.

CAZ246-253-254-151700-
/O.CON.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
247 PM PST Thu Jan 14 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES
AND VENTURA COUNTIES...

* Winds...North to northeast winds 15 to 30 mph with gusts to 50 
  mph. Strongest later tonight into Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas, mainly on Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-151700-
/O.CON.KLOX.FW.W.0001.210115T0000Z-210116T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
247 PM PST Thu Jan 14 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA VALLEYS, SANTA
CLARITA VALLEY, AND SAN FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 40 
  mph. Isolated gusts to 50 mph. Strongest tonight into Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas, mainly Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ239-252-151700-
/O.CON.KLOX.FW.A.0001.210116T0200Z-210116T1800Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
247 PM PST Thu Jan 14 2021

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR
THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

* Winds...North to northeast winds 15 to 30 mph with gusts to 50 
  mph possible. Strongest in the Montecito Hills area.

* Relative Humidity...As low as 8 to 15 percent. Poor overnight 
  recoveries.

* 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.

&&

$$

MW
922 
WWUS86 KLOX 151706
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
906 AM PST Fri Jan 15 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 4 PM SATURDAY FOR THE LOS
ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS...

...FIRE WEATHER WATCH CANCELLED FOR THE SANTA BARBARA COUNTY 
MOUNTAINS AND SOUTH COAST...

.North to northeast winds will continue over Los Angeles and
Ventura Counties through Saturday with very low humidities. Along
with persistently dry fuels, this combination of wind and 
humidity will result in critical fire weather conditions over the 
valleys and mountains of Los Angeles and Ventura Counties. Locally
gusty winds and dry air are still expected across Santa Barbara 
County tonight into early Saturday and a few hours of critical
conditions are likely, especially in the Montecito Hills area, 
however most areas will not reach red flag criteria for more than 
5 hours and for this reason the fire weather watch has been 
cancelled.

CAZ239-252-151815-
/O.CAN.KLOX.FW.A.0001.210116T0200Z-210116T1800Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
906 AM PST Fri Jan 15 2021

...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE
HUMIDITY FOR THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST...

The National Weather Service in Los Angeles/Oxnard has cancelled
the Fire Weather Watch.

A few hours of critical conditions are expected, especially in the
Montecito Hills area, however most areas will not reach red flag
criteria for 6 hours. 

$$

CAZ246-253-254-160115-
/O.EXT.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
906 AM PST Fri Jan 15 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 4 PM PST SATURDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES
AND VENTURA COUNTIES...

* Winds...North to northeast winds 25 to 35 mph with gusts to 55 
  mph. Strongest today.

* Relative Humidity...8 to 15 percent but as low as 5 percent in
  isolated areas. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-160115-
/O.EXT.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
906 AM PST Fri Jan 15 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 4 PM PST SATURDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA VALLEYS, SANTA
CLARITA VALLEY, AND SAN FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 40
  mph. Isolated gusts to 50 mph in the hills. Strongest today.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas, mainly Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

MW
396 
WWUS86 KLOX 152239
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
239 PM PST Fri Jan 15 2021

...RED FLAG WARNING IN EFFECT UNTIL 4 PM SATURDAY FOR THE LOS 
ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS...

.North to northeast winds will continue over Los Angeles and 
Ventura Counties through Saturday with very low humidities. Along 
with persistently dry fuels, this combination of wind and humidity
will result in critical fire weather conditions over the valleys 
and mountains of Los Angeles and Ventura Counties. There is a
chance that the warning will need to be extended into Sunday.
Across Santa Barbara County, locally gusty winds and dry air are 
still expected into early Saturday and a few hours of critical 
conditions are likely, especially in the Montecito Hills area, 
however most areas will not reach red flag criteria for more than 
5 hours.

CAZ246-253-254-161700-
/O.CON.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
239 PM PST Fri Jan 15 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES
AND VENTURA COUNTIES...

* Winds...North to northeast winds 20 to 30 mph with gusts to 50
  mph. Strongest Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-161700-
/O.CON.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
239 PM PST Fri Jan 15 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA VALLEYS, SANTA
CLARITA VALLEY, AND SAN FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 40
  mph. Isolated gusts to 50 mph in the hills. Strongest Friday.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas, mainly Friday. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

MW
804 
WWUS86 KLOX 161739
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
939 AM PST Sat Jan 16 2021

...RED FLAG WARNING IN EFFECT UNTIL 4 PM TODAY FOR THE LOS 
ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS...

.North to northeast winds will continue over Los Angeles and
Ventura Counties today with very low humidities. Along with 
persistently dry fuels, this combination of gusty offshore winds 
and low humidity will result in critical fire weather conditions 
over the valleys and mountains of Los Angeles and Ventura 
Counties. There is a chance that the warning will need to be 
extended into Sunday. Across Santa Barbara and San Luis Obispo 
Counties, locally gusty offshore winds and dry air will bring 
elevated to brief critical fire weather conditions today,
especially in the mountains and foothills.

CAZ246-253-254-170000-
/O.CON.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
939 AM PST Sat Jan 16 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE 
HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...North to northeast winds 15 to 30 mph with gusts 40 to 
  50 mph, diminishing late.

* Relative Humidity...8 to 15 percent but as low as 5 percent in 
  isolated areas. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-170000-
/O.CON.KLOX.FW.W.0001.000000T0000Z-210117T0000Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
939 AM PST Sat Jan 16 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON FOR GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE 
HUMIDITY FOR THE VENTURA VALLEYS, SANTA CLARITA VALLEY, AND SAN 
FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 40
  mph diminishing late. Isolated gusts to 45 mph in the hills.

* Relative Humidity...8 to 15 percent but as low as 5 percent in
  isolated areas. Poor overnight recoveries.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

Gomberg
001 
WWUS86 KLOX 170004
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
404 PM PST Sat Jan 16 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING FOR
THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND VALLEYS DUE TO
GUSTY NORTHEAST WINDS AND LOW RELATIVE HUMIDITY...

.North to northeast winds gusting between 30 and 45 mph will 
continue across the mountains and valleys of Los Angeles and 
Ventura Counties through this evening prompting the extension of 
the Red Flag Warning. Humidities will also remain between 8 and 15
percent across the warning area through this evening. Offshore 
winds are expected to be slightly weaker and a bit more localized 
later tonight into Sunday, however elevated to brief critical fire
weather conditions are still expected. 

CAZ246-253-254-170400-
/O.EXT.KLOX.FW.W.0001.000000T0000Z-210117T0400Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
404 PM PST Sat Jan 16 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING FOR
GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR THE
MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...North to northeast winds 15 to 30 mph with gusts 35 to
  45 mph, diminishing some by late evening.

* Relative Humidity...8 to 15 percent. Poor overnight recovery.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

CAZ244-245-288-547-170400-
/O.EXT.KLOX.FW.W.0001.000000T0000Z-210117T0400Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
404 PM PST Sat Jan 16 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING FOR
GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR THE
VENTURA VALLEYS, SANTA CLARITA VALLEY, AND SAN FERNANDO VALLEY...

* Winds...North to northeast winds 15 to 25 mph with gusts to 35 
  mph diminishing some by late evening. Isolated gusts to 45 mph 
  in the hills.

* Relative Humidity...8 to 15 percent.

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

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 and low relative humidity can contribute to extreme
fire behavior. Use extreme caution with potential fire ignition
sources.

&&

$$

Gomberg
248 
WWUS86 KLOX 170355
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
755 PM PST Sat Jan 16 2021

CAZ246-253-254-170500-
/O.EXP.KLOX.FW.W.0001.000000T0000Z-210117T0400Z/
Santa Monica Mountains Recreational Area-
Ventura County Mountains / Los Padres National Forest-
Los Angeles County Mountains / Angeles National Forest-
755 PM PST Sat Jan 16 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM PST THIS EVENING FOR
GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR THE
MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES...

Widespread Red Flag conditions have ended, however elevated to
brief critical conditions are likely to continue through Sunday.

$$

CAZ244-245-288-547-170500-
/O.EXP.KLOX.FW.W.0001.000000T0000Z-210117T0400Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
755 PM PST Sat Jan 16 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM PST THIS EVENING FOR
GUSTY NORTH TO NORTHEAST WINDS AND LOW RELATIVE HUMIDITY FOR THE
VENTURA VALLEYS, SANTA CLARITA VALLEY, AND SAN FERNANDO VALLEY...

Widespread Red Flag conditions have ended, however elevated to
brief critical conditions are likely to continue through Sunday.

$$

Smith

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 13, 2:11 PM PSTWind AdvisoryLOXLos Angeles49 hr
Jan 13, 2:45 PM PSTFire Weather WatchLOX42 hr

Nearby

Red Flag Warnings in California, 2021Every red flag warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.