Alert archive / California / Red Flag Warnings in 2023

Red Flag Warning 2, NWS Los Angeles, CA

October 27, 2023Los Angeles County, Ventura County, California

NWS Los Angeles, CA issued this red flag warning at Oct 27, 2023, 2:15 PM PDT for Los Angeles County, Ventura County, California. It took effect at Oct 29, 2023, 3:00 AM PDT. It was in force for 59 hr. 35 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
Oct 27, 2023, 2:15 PM PDT (21:15 UTC)
In effect from
Oct 29, 2023, 3:00 AM PDT
Expired
Oct 31, 2023, 2:00 PM PDT
In force
59 hr
Issued by
NWS Los Angeles, CA

Counties Los Angeles County, CA, Ventura County, CA

The radar

The Los Angeles radar (KVTX), 47 km from the middle of the area, began a volume at 21:13 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
Oct 29, 10:10 AM PDTNON-TSTM WND GST 607 Ssw Woodland Hills, CAMESONET STATION 548SE BACKBONE TRAIL (SCE).
Oct 29, 10:10 AM PDTNON-TSTM WND GST 617 Ene Point Dume, CAMESONET STATION 180SE MALIBU CREEK (SCE).
Oct 29, 10:16 AM PDTNON-TSTM WND GST 627 Ssw Woodland Hills, CAMESONET STATION DW2363 SADDLE PEAK.
Oct 29, 10:30 AM PDTNON-TSTM WND GST 736 E Point Mugu, CAMESONET STATION DW5145 BONEY MOUNTAIN.
Oct 29, 10:31 AM PDTNON-TSTM WND GST 704 W Camarillo, CAASOS STATION KCMA CAMARILLO AIRPORT.
Oct 29, 11:00 AM PDTNON-TSTM WND GST 622 Ne Point Dume, CAMESONET STATION SE037 ESCONDIDO CYN (SCE).
Oct 29, 11:09 AM PDTNON-TSTM WND GST 655 Ne Point Mugu, CAMESONET STATION MLXC1 MILLER RANCH.
Oct 29, 11:20 AM PDTNON-TSTM WND GST 615 Nne Fillmore, CAMESONET STATION 469SE DOUGH FLAT TRAILHEAD (SCE).
Oct 29, 11:20 AM PDTNON-TSTM WND GST 928 S Agua Dulce, CAMESONET STATION SE678 MAGIC MTN TRUCK TRL (SCE).
Oct 29, 11:40 AM PDTNON-TSTM WND GST 607 Sse Acton, CAMESONET STATION 546SE MESA VINCENT 2.
Oct 29, 11:40 AM PDTNON-TSTM WND GST 753 Nnw Chatsworth, CAMESONET STATION 470SE PALO SOLA TRUCK RD (SCE).
Oct 29, 11:46 AM PDTNON-TSTM WND GST 581 Ene Oxnard, CAASOS STATION KOXR OXNARD APT.
Oct 29, 11:49 AM PDTNON-TSTM WND GST 663 Sw Piru, CAMESONET STATION WLYC1 WILEY RIDGE RAWS.
Oct 29, 11:50 AM PDTNON-TSTM WND GST 661 Nnw Chatsworth, CAMESONET STATION SE712 BROWNS CYN (SCE).
Oct 29, 11:56 AM PDTNON-TSTM WND GST 648 Ssw Woodland Hills, CAMESONET STATION MBUC1 MALIBU HILLS RAWS.
Oct 29, 11:58 AM PDTNON-TSTM WND GST 586 Ne Pyramid Lake, CAASOS STATION KSDB SANDBERG.
Oct 29, 12:10 PM PDTNON-TSTM WND GST 581 Nne Point Dume, CAMESONET STATION SE103 RAMIREZ CYN (SCE).
Oct 29, 12:21 PM PDTNON-TSTM WND GST 584 Wnw Point Mugu, CAAWOS STATION KNTD POINT MUGU NAS.
Oct 29, 1:50 PM PDTNON-TSTM WND GST 594 N Chatsworth, CAMESONET STATION SE079 OAT MOUNTAIN (SCE).
Oct 29, 1:53 PM PDTNON-TSTM WND GST 618 Nne Mount Wilson, CAMESONET STATION CHOC1 CHILAO RAWS.
Oct 29, 1:55 PM PDTNON-TSTM WND GST 595 Nne San Fernando, CAMESONET STATION CNIC1 CAMP NINE RAWS.
Oct 30, 2:30 AM PDTNON-TSTM WND GST 703 Nnw Chatsworth, CAMesonet station 470SE Palo Sola Truck Rd (SCE).
Oct 30, 2:53 AM PDTNON-TSTM WND GST 588 Se Acton, CAMesonet station MLCC1 Mill Creek RAWS.
Oct 30, 3:55 AM PDTNON-TSTM WND GST 675 Nne San Fernando, CAMesonet station CNIC1 Camp Nine RAWS.
Oct 30, 4:00 AM PDTNON-TSTM WND GST 586 Ne Agua Dulce, CAMesonet station SE444 Sierra Pelona West (SCE).
Oct 30, 4:00 AM PDTNON-TSTM WND GST 695 W Chatsworth, CAMesonet station SE519 E Simi Vly Cochran (SCE).
Oct 30, 4:00 AM PDTNON-TSTM WND GST 701 Nnw Chatsworth, CAMesonet station SE712 Browns Cyn (SCE).
Oct 30, 4:15 AM PDTNON-TSTM WND GST 646 E Point Mugu, CAMesonet station DW5145 Boney Mountain.
Oct 30, 4:30 AM PDTNON-TSTM WND GST 968 S Agua Dulce, CAMesonet station SE678 Magic Mtn Truck Trl (SCE).
Oct 30, 5:20 AM PDTNON-TSTM WND GST 653 Ese Santa Paula, CAMesonet station 040SE S Mountain Lookout Rd (SCE).
Oct 30, 6:15 AM PDTNON-TSTM WND GST 584 E Point Mugu, CAMesonet station FW0112 Deer Creek Canyon.
Oct 30, 10:40 AM PDTNON-TSTM WND GST 613 N Moorpark, CAMesonet station SE277 Happy Camp Rd (SCE).
Oct 30, 11:49 AM PDTNON-TSTM WND GST 603 Sw Piru, CAMesonet station WLYC1 Wiley Ridge RAWS.
Oct 31, 5:40 AM PDTNON-TSTM WND GST 605 W Chatsworth, CAMesonet station SE519 E Simi Vly Cochran (SCE).
Oct 31, 10:00 AM PDTNON-TSTM WND GST 593 Nnw Chatsworth, CAMesonet station 470SE Palo Sola Truck Rd (SCE).

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

The nearest sounding before it

Vandenberg AFB, CA (KVBG), launched 12:00Z, 9.3 hours before the alert went out and 173 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, Vandenberg AFB, CA at 12:00Z on 2023-10-27Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Vandenberg AFB, CA at 12:00Z on 2023-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 square meters per square second.1939Sfc1 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
1646 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
-22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

210 
WWUS86 KLOX 272115
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
215 PM PDT Fri Oct 27 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY MORNING THROUGH 10
PM MONDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR MUCH OF LOS ANGELES AND VENTURA COUNTIES...

.Our first significant Santa Ana wind event of the season will
likely bring critical Red Flag conditions to wind prone areas of 
Los Angeles and Ventura counties late Saturday night into Monday 
evening. The onset of Santa Ana winds will bring rapid drying to 
the region late Saturday night, with widespread single digit 
humidities Sunday into Monday. The strongest Santa Ana winds are 
expected Sunday, when gusts of 35 to 50 mph will be common, except
gusts of 50 to 65 mph likely in the Los Angeles county mountains,
Santa Susana mountains, western Santa Monicas, and wind prone
foothills. Dry and breezy offshore flow conditions will persist 
into Tuesday which may extend critical fire weather conditions 
across portions of Los Angeles and Ventura counties. While not 
currently in the warning area, interior portions of San Luis 
Obispo and Santa Barbara counties will see elevated to brief 
critical fire weather conditions Sunday into Monday.

CAZ369-375-378>380-281700-
/O.UPG.KLOX.FW.A.0002.231029T1000Z-231031T0500Z/
/O.NEW.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Western Santa Monica Mountains Recreational Area-
Santa Susana Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
215 PM PDT Fri Oct 27 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY TO 10 PM PDT
MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY 
FOR THE LOS ANGELES COUNTY MOUNTAINS, THE WESTERN SANTA MONICAS,
AND SANTA SUSANA MOUNTAINS...

The National Weather Service in Los Angeles/Oxnard has issued a
Red Flag Warning FOR GUSTY NORTHEAST WINDS AND VERY LOW RELATIVE 
HUMIDITY, which is in effect from 3 AM Sunday to 10 PM PDT Monday.
The Fire Weather Watch is no longer in effect.

* Winds...Northeast 25 to 40 mph with gusts 50 to 60 mph, except
  isolated gusts to 65 mph in favored locations. Strongest winds 
  on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can 
spark a wildfire. Residents near wildland interfaces should be 
prepared to evacuate if a wildfire breaks out. See 
readyforwildfire.org and wildfirerisk.org for information.

&&

$$

CAZ288-358-370>374-376-377-548-281700-
/O.UPG.KLOX.FW.A.0002.231029T1000Z-231031T0500Z/
/O.NEW.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Santa Clarita Valley-Central Ventura County Valleys-
Eastern Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Southern Ventura County Mountains-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
215 PM PDT Fri Oct 27 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY TO 10 PM PDT
MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY 
FOR VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS THE 
VENTURA COUNTY MOUNTAINS AND EASTERN SANTA MONICAS...

The National Weather Service in Los Angeles/Oxnard has issued a
Red Flag Warning FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE 
HUMIDITY, which is in effect from 3 AM Sunday to 10 PM PDT Monday.
The Fire Weather Watch is no longer in effect.

* Winds...North to northeast 20 to 35 mph with gusts 40 to 50 mph,
  except isolated gusts to 60 mph in favored foothills. Strongest
  winds on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-281700-
/O.UPG.KLOX.FW.A.0002.231029T1000Z-231031T0500Z/
/O.NEW.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
215 PM PDT Fri Oct 27 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY TO 10 PM PDT
MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY 
FOR THE VENTURA COUNTY AND MALIBU COASTS...

The National Weather Service in Los Angeles/Oxnard has issued a
Red Flag Warning FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE 
HUMIDITY, which is in effect from 3 AM Sunday to 10 PM PDT Monday.
The Fire Weather Watch is no longer in effect.

* Winds...Northeast 15 to 30 mph with gusts 35 to 45 mph, except
  isolated gusts to 50 mph in the hills above Malibu. Strongest 
  winds on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Gomberg
9 follow-up statements
793 
WWUS86 KLOX 281703
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1003 AM PDT Sat Oct 28 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY MORNING THROUGH
10 PM MONDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW
RELATIVE HUMIDITY FOR MUCH OF LOS ANGELES AND VENTURA COUNTIES...

.Our first significant Santa Ana wind event of the season will
likely bring critical Red Flag conditions to wind prone areas of
Los Angeles and Ventura counties late Saturday night into Monday
evening. The onset of Santa Ana winds will bring rapid drying to
the region late Saturday night, with widespread single digit
humidities Sunday into Monday. The strongest Santa Ana winds are
expected Sunday, when gusts of 35 to 50 mph will be common,
except gusts of 50 to 65 mph likely in the Los Angeles county
mountains, Santa Susana mountains, western Santa Monicas, and
wind prone valleys and foothills. Dry and breezy offshore flow 
conditions will persist into Tuesday with a 30-40 percent chance
that critical fire weather conditions will continue across wind
prone portions of Los Angeles and Ventura counties. While not 
currently in the warning area, interior portions of San Luis 
Obispo and Santa Barbara counties will see elevated to brief 
critical fire weather conditions Sunday into Monday.

CAZ369-375-378>380-290115-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Western Santa Monica Mountains Recreational Area-
Santa Susana Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
1003 AM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE LOS ANGELES COUNTY MOUNTAINS, THE WESTERN SANTA
MONICAS, AND SANTA SUSANA MOUNTAINS...

* Winds...Northeast 25 to 40 mph with gusts 50 to 60 mph, except 
  isolated gusts to 65 mph in favored locations. Strongest winds 
  on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.

&&

$$

CAZ288-358-370>374-376-377-548-290115-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Santa Clarita Valley-Central Ventura County Valleys-
Eastern Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Southern Ventura County Mountains-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
1003 AM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AS WELL
AS THE VENTURA COUNTY MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...North to northeast 20 to 35 mph with gusts 40 to 50 mph,
  except gusts to 60 mph in favored valleys and foothills. 
  Strongest winds on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-290115-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
1003 AM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 30 mph with gusts 35 to 45 mph, except 
  isolated gusts to 55 mph in the hills above Malibu. Strongest 
  winds on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$
126 
WWUS86 KLOX 282053
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
153 PM PDT Sat Oct 28 2023

...RED FLAG WARNING IN EFFECT FROM 3 AM SUNDAY MORNING THROUGH
10 PM MONDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW
RELATIVE HUMIDITY FOR MUCH OF LOS ANGELES AND VENTURA COUNTIES...

.Our first significant Santa Ana wind event of the season will
likely bring critical Red Flag conditions to wind prone areas of
Los Angeles and Ventura counties late tonight through Monday 
evening. The onset of Santa Ana winds will bring rapid drying to 
the region late Saturday night, with widespread single digit 
humidities Sunday into Monday. The strongest Santa Ana winds are 
expected Sunday with widespread wind gusts of 40 to 60 mph. Dry 
and breezy offshore flow conditions will persist into Tuesday with
a 40-50 percent chance that critical fire weather conditions will
continue across wind prone portions of Los Angeles and Ventura 
counties. While not currently in the warning area, interior 
portions of San Luis Obispo and Santa Barbara counties will see 
elevated to brief critical fire weather conditions Sunday into 
Monday.

CAZ369-375-378>380-291700-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Western Santa Monica Mountains Recreational Area-
Santa Susana Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
153 PM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE LOS ANGELES COUNTY MOUNTAINS, THE WESTERN SANTA
MONICAS, AND SANTA SUSANA MOUNTAINS...

* Winds...Northeast 25 to 40 mph with gusts 50 to 60 mph, except
  isolated gusts to 70 mph in prone locations. Strongest winds on
  Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.

&&

$$

CAZ288-358-370>374-376-377-548-291700-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Santa Clarita Valley-Central Ventura County Valleys-
Eastern Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Southern Ventura County Mountains-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
153 PM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AS WELL
AS THE VENTURA COUNTY MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...North to northeast 25 to 40 mph with gusts 45 to 60 
  mph. Strongest winds on Sunday, diminishing around 10 mph on 
  Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-291700-
/O.CON.KLOX.FW.W.0002.231029T1000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
153 PM PDT Sat Oct 28 2023

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM SUNDAY TO 10 PM
PDT MONDAY FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 30 mph with gusts 50 mph, except gusts
  to 60 mph in the hills above Malibu. Strongest winds on Sunday,
  diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Munroe
230 
WWUS86 KLOX 291649
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
949 AM PDT Sun Oct 29 2023

...RED FLAG WARNING IN EFFECT THROUGH 10 PM MONDAY EVENING FOR 
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR MUCH OF 
LOS ANGELES AND VENTURA COUNTIES...

.The first strong Santa Ana wind event of the season is now
ongoing and behaving close to expectations with widespread wind 
gusts of 40 to 60 mph through the mountains valleys and some 
coasts within the Santa Ana wind cooridor of LA/Ventura Counties 
with isolated gusts near 70 mph. Single digit humidities will
prevail during the day with minimal recovery at night. Winds may 
drop off a bit into Monday but remain on the strong side. Further
weakening is expected into Tuesday, but may remain strong enough
to support continued critical fire weather conditions (30-50
percent chance) away from the coast across wind prone portions of
Los Angeles and Ventura counties.

CAZ369-375-378>380-301700-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Western Santa Monica Mountains Recreational Area-
Santa Susana Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
949 AM PDT Sun Oct 29 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT MONDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR THE LOS
ANGELES COUNTY MOUNTAINS, THE WESTERN SANTA MONICAS, AND SANTA
SUSANA MOUNTAINS...

* Winds...Northeast 25 to 40 mph with gusts 50 to 60 mph, except 
  isolated gusts to 70 mph in prone locations. Strongest winds 
  on Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.

&&

$$

CAZ288-358-370>374-376-377-548-301700-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Santa Clarita Valley-Central Ventura County Valleys-
Eastern Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Southern Ventura County Mountains-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
949 AM PDT Sun Oct 29 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT MONDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR VALLEYS
OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS THE VENTURA COUNTY
MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...North to northeast 25 to 40 mph with gusts 45 to 60 
  mph. Strongest winds on Sunday, diminishing around 10 mph on 
  Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-301700-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
949 AM PDT Sun Oct 29 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT MONDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR THE
VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 30 mph with gusts 50 mph, except gusts 
  to 60 mph in the hills above Malibu. Strongest winds on 
  Sunday, diminishing around 10 mph on Monday.

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Munroe
446 
WWUS86 KLOX 301648
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
948 AM PDT Mon Oct 30 2023

...RED FLAG WARNING IN EFFECT THROUGH 10 PM THIS EVENING FOR 
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR MUCH OF 
LOS ANGELES AND VENTURA COUNTIES...

.The first strong Santa Ana wind event of the season is ongoing 
and expected to begin weakening today wind gusts of 35 to 55 mph 
through the mountains valleys and some coasts within the Santa Ana
wind cooridor of LA/Ventura Counties with isolated gusts near 60 
mph. Single digit humidities will prevail during the day with 
minimal recovery in the evening to overnight. 

CAZ369-375-378>380-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Western Santa Monica Mountains Recreational Area-
Santa Susana Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
948 AM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR THE LOS ANGELES COUNTY MOUNTAINS, THE WESTERN SANTA MONICAS,
AND SANTA SUSANA MOUNTAINS...

* Winds...Northeast 20 to 35 mph with gusts 45 to 60 mph. 

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
will occur shortly. Use extreme caution with anything that can
spark a wildfire. Residents near wildland interfaces should be
prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.

&&

$$

CAZ288-358-370>374-376-377-548-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Santa Clarita Valley-Central Ventura County Valleys-
Eastern Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Southern Ventura County Mountains-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
948 AM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS THE
VENTURA COUNTY MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...North to northeast 25 to 40 mph with gusts 45 to 55 mph. 

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
948 AM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR THE VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 25 mph with gusts 45 mph. 

* Relative Humidity...Minimum humidity each day 5 to 10 percent. 
  Very poor humidity recoveries of 10 to 20 percent in wind 
  prone areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Munroe
019 
WWUS86 KLOX 302053
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
153 PM PDT Mon Oct 30 2023

...RED FLAG WARNING EXTENDED THROUGH 2 PM TUESDAY FOR WIND PRONE
MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTY...

...RED FLAG WARNING IN EFFECT THROUGH 10 PM FOR LESS WIND PRONE
COASTS, MOST VALLEYS OF LA COUNTY, AND THE EASTERN SANTA
MONICA MOUNTAINS...

.Moderate Santa Ana winds and very dry conditions are expected to
continue through early Tuesday afternoon and has prompted the 
extension of the Red Flag Warning through 2 pm Tuesday for the 
most wind prone mountains and valleys of Los Angeles and Ventura 
Counties. Wind gusts of 30 to 50 mph will be common during this 
time with humidity values generally in the 5 to 15 percent range, 
even overnight for wind prone areas.

CAZ288-358-369-371-374>376-378>380-311700-
/O.EXT.KLOX.FW.W.0002.000000T0000Z-231031T2100Z/
Santa Clarita Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
153 PM PDT Mon Oct 30 2023

...RED FLAG WARNING NOW IN EFFECT UNTIL 2 PM PDT TUESDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR VALLEYS
OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS THE VENTURA COUNTY
MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...Northeast to east 20 to 30 mph with gusts to 50 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent. Very 
  poor humidity recoveries of 10 to 20 percent in wind prone 
  areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ370-372-373-377-548-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Eastern Santa Monica Mountains Recreational Area-
Western San Fernando Valley-Eastern San Fernando Valley-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
153 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AS WELL AS THE
VENTURA COUNTY MOUNTAINS AND EASTERN SANTA MONICAS...

* Winds...Northeast 20 to 30 mph with gusts to 50 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent. 

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
153 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR THE VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 25 mph with gusts to 40 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent. 

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Munroe
150 
WWUS86 KLOX 302137
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
237 PM PDT Mon Oct 30 2023

...RED FLAG WARNING EXTENDED THROUGH 2 PM TUESDAY FOR WIND PRONE
MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTY...

...RED FLAG WARNING IN EFFECT THROUGH 10 PM FOR LESS WIND PRONE
COASTS, MOST VALLEYS OF LA COUNTY, AND THE EASTERN SANTA MONICA
MOUNTAINS...

.Moderate Santa Ana winds and very dry conditions are expected to
continue through early Tuesday afternoon and has prompted the
extension of the Red Flag Warning through 2 pm Tuesday for the
most wind prone mountains and valleys of Los Angeles and Ventura
Counties. Wind gusts of 30 to 50 mph will be common during this
time with humidity values generally in the 5 to 15 percent range,
even overnight for wind prone areas.

CAZ370-372-373-377-548-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Eastern Santa Monica Mountains Recreational Area-
Western San Fernando Valley-Eastern San Fernando Valley-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
237 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR THE SAN FERNANDO VALLEY AND MOUNTAINS OF LOS ANGELES 
COUNTY...

* Winds...Northeast 20 to 30 mph with gusts to 50 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ354-355-362-310500-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
237 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS
EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY
FOR THE VENTURA COUNTY AND MALIBU COASTS...

* Winds...Northeast 15 to 25 mph with gusts to 40 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

CAZ288-358-369-371-374>376-378>380-311600-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T2100Z/
Santa Clarita Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
237 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 2 PM PDT TUESDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR WIND
PRONE MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...Northeast to east 20 to 30 mph with gusts to 50 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent. Very 
  poor humidity recoveries of 10 to 20 percent in wind prone 
  areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

Munroe
141 
WWUS86 KLOX 310503
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1003 PM PDT Mon Oct 30 2023

...RED FLAG WARNING EXTENDED THROUGH 2 PM TUESDAY FOR WIND PRONE
MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTY...

.Moderate Santa Ana winds and very dry conditions are expected to
continue through early Tuesday afternoon and has prompted the
extension of the Red Flag Warning through 2 pm Tuesday for the
most wind prone mountains and valleys of Los Angeles and Ventura
Counties. Wind gusts of 30 to 50 mph will be common during this
time with humidity values generally in the 5 to 15 percent range,
even overnight for wind prone areas.

CAZ354-355-362-370-372-373-377-548-310615-
/O.EXP.KLOX.FW.W.0002.000000T0000Z-231031T0500Z/
Ventura County Beaches-Ventura County Inland Coast-Malibu Coast-
Eastern Santa Monica Mountains Recreational Area-
Western San Fernando Valley-Eastern San Fernando Valley-
Northern Ventura County Mountains-
Los Angeles County San Gabriel Valley-
1003 PM PDT Mon Oct 30 2023

...RED FLAG WARNING HAS EXPIRED FOR GUSTY SANTA ANA WINDS AND
VERY LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY AND MALIBU
COASTS...

Conditions have subsided below Red Flag levels, but brief critical
conditions may occur through Tuesday afternoon.

$$

CAZ288-358-369-371-374>376-378>380-311715-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T2100Z/
Santa Clarita Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
1003 PM PDT Mon Oct 30 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 2 PM PDT TUESDAY FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR WIND
PRONE MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTIES...

* Winds...Northeast to east 20 to 30 mph with gusts to 50 mph.

* Relative Humidity...Minimum humidity of 5 to 10 percent. Very 
  poor humidity recoveries of 10 to 20 percent in wind prone 
  areas.

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$
289 
WWUS86 KLOX 311619
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
919 AM PDT Tue Oct 31 2023

...RED FLAG WARNING IN EFFECT THROUGH 2 PM TODAY FOR PORTIONS OF LOS 
ANGELES AND VENTURA COUNTIES DUE TO LOW HUMIDITIES AND GUSTY NORTHEAST
WINDS...

.Santa Ana wind gusts of 25 to 45 mph and humidities below 10
percent will continue critical fire weather conditions through
this afternoon over portions of Los Angeles and Ventura Counties.
While red flag weather conditions may continue past that through
Wednesday, they should be more localized and less extreme. As
such, there are NO immediate plans to extend this Red Flag Warning
beyond the current 2 pm expiration. 

CAZ288-358-369-371-374>376-378>380-312100-
/O.CON.KLOX.FW.W.0002.000000T0000Z-231031T2100Z/
Santa Clarita Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
919 AM PDT Tue Oct 31 2023

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE
HUMIDITY FOR WIND PRONE MOUNTAINS AND VALLEYS OF LOS ANGELES AND
VENTURA COUNTIES...

* WINDS...Northeast to east 15 to 30 mph with gusts to 45 mph.
  Isolated gusts to 55 mph early.

* RELATIVE HUMIDITY...Minimum humidity of 3 to 10 percent. 

* Impacts...If fire ignition occurs there could be rapid spread 
  of wildfire that would lead to a threat to life and property.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Use extreme caution
with anything that can spark a wildfire. Residents near wildland
interfaces should be prepared to evacuate if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information.

&&

$$

RK
779 
WWUS86 KLOX 312048
RFWLOX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
148 PM PDT Tue Oct 31 2023

...RED FLAG WARNING WILL EXPIRE AT 2 PM TODAY FOR PORTIONS OF LOS
ANGELES AND VENTURA COUNTIES...

.The Red Flag Warning will be allowed to expire on time at 2 PM
today.

CAZ288-358-369-371-374>376-378>380-312200-
/O.EXP.KLOX.FW.W.0002.000000T0000Z-231031T2100Z/
Santa Clarita Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-
Calabasas and Agoura Hills-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-
Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-
148 PM PDT Tue Oct 31 2023

...RED FLAG WARNING WILL EXPIRE AT 2 PM PDT THIS AFTERNOON FOR
GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR WIND
PRONE MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTIES...

The strong Santa Ana winds that prompted the Red Flag issuance 
will continue to trend down through Wednesday and Thursday. While
elevated fire weather conditions will continue through Friday due
to the very dry air remaining in place, conditions will not be 
extreme enough to warrant an extension of the Red Flag Warning.
The current warning therefore will be allowed to expire on time. 

$$

RK

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Los Angeles, CA wrote its last area forecast discussion before this red flag warning went out at Oct 27, 11:46 AM PDT, 2 hours 29 minutes earlier.

Area forecast discussion, Oct 27, 11:46 AM PDT, 2 hours 29 minutes before
Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
1146 AM PDT Fri Oct 27 2023

.SYNOPSIS...27/805 AM.

Mild temperatures through Saturday with areas of gusty northwest
to north winds. Daytime warming and drying Sunday through
Wednesday, with moderate to strong Santa Ana winds likely across
Los Angeles and Ventura Counties with fire weather concerns.
Interior valleys are expected to see freezing temperatures each
morning Sunday through Wednesday.

&&

.SHORT TERM (TDY-SUN)...27/818 AM.

***UPDATE***

Low clouds are making a late surge into Los Angeles County from
the southeast and look poised to push into parts of Ventura County
as well. Updated the forecast to account for that. These clouds
should clear out by this afternoon. Otherwise the forecast looks
good for today, with low-end Wind Advisory level northwest winds
over southwest Santa Barbara County and the I-5 Corridor the only
concern. The challenge for today will be the handling of the winds
for Saturday through Tuesday, and what to do with the High Wind
Watch. The current forecast remains on track in general. At this
point, the High Wind Watch period looks to be more of a strong
Wind Advisory with the appreciable probabilities of gusts over 60
mph fairly localized. Will assess further today. That is a small
nuanced detail however. Regardless, this is a high confidence
very significant event for Saturday Night through Monday,
especially from a Fire Weather standpoint. Residents in the Fire
Weather Watch area, especially those in high fire danger locales,
need to get ready now in case a fire starts or power loss
materializes.

***From Previous Discussion***

Skies were mostly clear across much of the region, except random
patches of low clouds have developed, especially across L.A.
County and eastern Ventura County. Clouds may increase a bit more
in coverage by daybreak. However, with a very weak inversion in
place, and with weakening onshore gradients between KLAX and KDAG,
and offshore N-S gradients, expect any low clouds to clear by
mid or possibly late morning. There will be some high clouds
later today, possibly enough to go with a partly cloudy forecast
of the afternoon, especially across SLO and SBA Counties.

A broad trough was in place across the western United States this
morning and it will deepen some today. Although heights will fall
a bit, decreasing W-E onshore flow and increasingly offshore N-S
gradients should offset cooling west of the mountains, so expect
max temps today to be similar to those on Thu in most areas.

N-S gradients and some upper level support should allow NW to N
winds to reach at least low end advisory levels across the
southwestern coast of SBA County, the western Santa Ynez
Mountains, and the I-5 Corridor late this afternoon or evening,
continuing through early Sat morning.

A rather strong and positively-tilted short wave trough will drop
southward through Idaho tonight, then into northeastern Nevada
and Utah on Sat, with the trough axis extending southwestward
into CA. Heights and thicknesses will drop tonight and Sat, and W
to NW flow aloft will increase. With so much cooling aloft, and
the northerly flow, there is some question as to whether there
will be much in the way of low clouds tonight and Sat morning. At
this point, the high res models and some short term ensembles are
indicating some stratus late tonight/Sat morning across coastal
sections of L.A. County and the San Gabriel Valley, and southern
portions of the Central Coast and Santa Ynez Valley. Any low
clouds should clear rather quickly on Sat. There will be some
gusty NW-N winds Sat afternoon and evening, probably strong
enough to require advisories in some areas, especially across
portions of southern SBA County, and through the I-5 Corridor.
Max temps should change little in most areas of Sat.

The upper trough will dig southward Sat night and Sun, with the
trough axis losing its negative tilt, and leaving strong
northerly flow aloft across the region. Wind advisories may again
be needed for much of southern SBA County late Sat afternoon
through late Sat evening.

Low level flow will turn northeasterly late Sat night and Sun,
with gradients between KLAX and KDAG getting to between 6 and 7 mb
offshore Sun morning. With the good offshore gradients, and
strong upper level support in the form of strong north to
northeast winds aloft, good subsidence and some cold air
advection, the ingredients seem to be coming together for a
moderate to strong Santa Ana Wind event across the region. A High
Wind Watch was already in effect for the L.A. County mountains.
Have extended the High Wind Watch to the southern mountains of
Ventura County, the Ventura County Valleys (mainly for eastern
sections), the Santa Clarita Valley, the San Fernando Valley
(mainly for northern and western sections), and the Santa Monica
Mountains. This watch is in effect from late Sat evening through
Mon. Wind advisories will be needed for coastal sections of
Ventura County and for the Malibu Coast, and there could be an
argument for a High Wind Watch on the Malibu Coast. Wind gusts
could reach 60 mph in the areas covered by the Watch, and would
not be surprised if there are some gusts to 70 mph in the windiest
locations Sun morning.

Where it is not windy, it will be very chilly Sat night, with
temps possibly dropping to freezing in the Antelope Valley and the
interior valleys of SLO and SBA Counties. Max temps on Sun will be
lower in the Antelope Valle and in the mountains due to the cold
advection. However, west of the mountains, NE flow will warm as
it descends, leading to some warming, especially across the
coastal plain. Max temps could exceed 80 degrees across coastal
sections of Ventura and L.A. Counties on Sun.

It will become very dry across the region late Sat night and
especially Sun, with widespread relative humidity values in the 5
to 10 percent range.

.LONG TERM (MON-THU)...27/511 AM.

The trough will begin to move eastward Sun night and Mon, and a
highly amplified ridge in the eastern Pacific will push into the
West Coast. There will still be some decent northerly winds aloft
across the region Sun night and Mon morning, but upper support
will weaken a bit as flow aloft gradually decreases and cold air
advection subsides. However, low level offshore gradients will
across be a bit steeper Sun night and Mon morning, so the
potential for High Wind level gusts to 60 mph will continue, at
least through the early Mon afternoon. Where it is not windy, it
will be very cold Sun night, with minimum temps near or possibly
even a few degrees below freezing in portions of the Antelope
Valley and the interior valleys of SLO and SBA Counties. On Mon,
rising heights, plenty of sunshine, offshore flow and weakening
cold advection should lead to warming everywhere, with the best
warming in coastal and valley areas. Max temps should climb above
80 degrees in many coastal and lower valley areas on Mon.

Beyond Monday, the deterministic runs of the GFS and EC show some
differences, with the EC maintaining a strong ridge across the
area Tue through Thu, briefly flattening out a bit on Tue as a
weak trough moves briefly into the West Coast to the north of the
region. The GFS also keeps the ridge across the region on Tue,
albeit a bit weaker, then shows a weak trough dropping through CA
Wed, evolving into a weak upper to the southwest of the forecast
area Thu. However, both models show high heights across the
region. In addition, both show offshore flow continuing Tue
through early Thu, with locally gusty winds especially Tue. Max
temps will likely rise in most areas on Tue, then depending upon
the model of choice, there will be slight cooling or little change
on Wed. It will again be very chilly both Mon night and Tue
night, with freezing or sub- freezing temps a good bet in the
Antelope Valley and in the portions of the interior valleys of SLO
and SBA Counties. For Thu, weakening offshore flow may bring some
slight cooling, especially to the coastal plain, and some low
clouds may return to coastal areas by Wed night/Thu.

&&

.AVIATION...27/1845Z.

At 1804Z at KLAX, the moist layer was 3900 feet deep with the
inversion top at 4600 feet and 11 degrees C.

Moderate confidence in TAF package. LA county coastal sections
are the main focus for a return of low clouds tonight, although
there is a 30 percent chance of MVFR CIGS pushing into the LA
valleys as well. Elsewhere, VFR conditions are expected through
the period.

KLAX...Moderate confidence in TAF. There is a 30 percent chance of
CIGS arriving plus or minus two hours from the forecast arrival
time. Light east winds under 5 kts are expected after 07Z
Saturday, but high confidence that any east wind component will
not reach 8 kts.

KBUR...Moderate confidence in TAF. There is a 30% chance of MVFR
CIGS late tonight into Sat morning.

&&

.MARINE...27/924 AM.

For the Outer Waters, moderate to high confidence in current
forecast. Now through Saturday night, high confidence in
widespread Small Craft Advisory (SCA) level winds and choppy seas
with a 20% chance of Gale force winds this afternoon and Saturday
afternoon. For Sunday through Tuesday, winds and seas are
generally expected to remain below SCA levels except there is a
50-60% chance of SCA level northeast winds on Sunday across
PZZ676.

For the Inner Waters north of Point Sal, high confidence in
current forecast. SCA level winds are expected until late tonight
and then during the afternoon and evening Saturday. For Sunday
through Tuesday, winds and seas are expected to remain below SCA
levels.

For the Inner Waters south of Point Conception, moderate
confidence in current forecast. Starting this afternoon lasting
through Saturday there is a 60-70% chance of SCA level winds
across the western half of the Santa Barbara Channel with high
confidence in winds and seas remaining below SCA levels elsewhere.
Late Saturday night through Monday afternoon, there is a 60-70%
chance of SCA level northeast winds from Ventura southward with
winds around 20 kt potentially impacting Catalina Island. Winds
will be the strongest on Sunday and in the morning hours. For
Tuesday, winds and seas are expected to remain below SCA levels
for all the southern Inner Waters.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...High Wind Watch in effect from Saturday evening through
      Monday afternoon for zones 88-358-369>372-374>376-378. (See LAXNPWLOX).
     Wind Advisory in effect from 5 PM this afternoon to 9 AM PDT
      Saturday for zones 349-351-378. (See LAXNPWLOX).
     High Wind Watch in effect from Saturday evening through
      Monday evening for zones 379-380. (See LAXNPWLOX).
     Fire Weather Watch in effect from late Saturday night through
      Monday evening for zones 288-354-355-358-362-369>380-548. (See LAXRFWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Saturday for
      zone 645. (See LAXMWWLOX).
     Small Craft Advisory in effect from 3 PM this afternoon to 3
      AM PDT Saturday for zone 650. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PDT Sunday for
      zones 670-673-676. (See LAXMWWLOX).

&&

PUBLIC...DB/Kittell
AVIATION...Sweet/Schoenfeld
MARINE...Sweet/Schoenfeld
SYNOPSIS...RK/Schoenfeld

weather.gov/losangeles

Experimental Graphical Hazardous Weather Outlook at:
https://www.weather.gov/erh/ghwo?wfo=lox

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 2:49 AM PDTSmall Craft AdvisoryLOX24 hr
Oct 27, 6:34 AM PDTWind AdvisoryLOXLos Angeles, Santa Barbara44 hr
Oct 27, 2:09 PM PDTFreeze WatchLOXLos Angeles, San Luis Obispo23 hr
Oct 27, 2:09 PM PDTFreeze WatchLOXLos Angeles, San Luis Obispo23 hr
Oct 27, 2:09 PM PDTHigh Wind WarningLOXLos Angeles, Santa Barbara, Ventura70 hr
Oct 27, 2:09 PM PDTWind AdvisoryLOXLos Angeles, Santa Barbara, Ventura4 days

Nearby

Red Flag Warnings in California, 2023Every red flag warning in 2023

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.