Weather Alerts for Los Angeles

Issued by the National Weather Service

Freeze Warning  FREEZE WARNING   Freeze Warning
LOS ANGELES

Areas Affected:
Antelope Valley
Effective: Mon, 10/26 3:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Mon, 10/26 9:00am Severity:  Moderate  Certainty: Likely

 
Details:
...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...HARD FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
MORNING...
* WHAT...For the Freeze Warning, low temperatures between 29 and
32 degrees are expected. For the Hard Freeze Watch, sub-
freezing temperatures between 25 and 28 are possible.
* WHERE...Antelope Valley.
* WHEN...For the Freeze Warning, until 9 AM PDT this morning.
For the Hard Freeze Watch, from late tonight through Tuesday
morning.
* IMPACTS...Freezing conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

Information:
Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

High Wind Warning  HIGH WIND WARNING   High Wind Warning
LOS ANGELES

Areas Affected:
Los Angeles County Mountains excluding the Santa Monica Range
Effective: Mon, 10/26 1:08am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 3:00pm Severity:  Severe  Certainty: Likely

 
Details:
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 3 PM PDT TUESDAY...
* WHAT...Northeast winds 30 to 45 mph with gusts up to 70 mph
expected. Isolated gusts to 80 on the higher peaks.
* WHERE...Los Angeles County Mountains. Strongest in and around
Interstate 5 and the Highway 14 corridors.
* WHEN...Until 3 PM PDT Tuesday.
* IMPACTS...Damaging winds will blow down large objects such as
trees, power lines and temporary structures. Power outages are
expected. Travel will be difficult, especially for high profile
vehicles.

Information:
People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive. Be prepared to secure all loose outdoor furniture
in advance of the onset of strong winds. Monitor the latest
forecasts on NOAA Weather Radio or your favorite media source.

High Wind Warning  HIGH WIND WARNING   High Wind Warning
LOS ANGELES

Areas Affected:
Los Angeles County San Gabriel Valley
Effective: Mon, 10/26 8:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Mon, 10/26 3:00pm Severity:  Severe  Certainty: Likely

 
Details:
...WIND ADVISORY NOW IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...HIGH WIND WARNING IN EFFECT FROM 8 AM THIS MORNING TO 3 PM PDT
THIS AFTERNOON...
* WHAT...For the Wind Advisory, areas of northeast winds 15 to 25
mph with gusts up to 40 mph expected. For the High Wind Warning,
north to northeast winds 25 to 40 mph with gusts up to 65 mph,
mainly in the foothills and near the 210 corridor. Isolated
gusts to 75 mph are possible.
* WHERE...San Gabriel Valley.
* WHEN...For the High Wind Warning, from 8 AM this morning to 3
PM PDT this afternoon. For the Wind Advisory, until 8 AM PDT
this morning.
* IMPACTS...Damaging winds could blow down large objects such as
trees, power lines, or temporary structures. Power outages are
possible. Travel could be difficult, especially for high
profile vehicles.
* ADDITIONAL DETAILS...The damaging wind potential is dependent
upon the development of mountain wave activity, which is likely,
but not a certainty.

Information:
People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

High Wind Warning  HIGH WIND WARNING   High Wind Warning
LOS ANGELES

Areas Affected:
Los Angeles County San Fernando Valley - Santa Clarita Valley - Santa Monica Mountains Recreational Area
Effective: Mon, 10/26 1:08am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 12:00pm Severity:  Severe  Certainty: Likely

 
Details:
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON PDT TUESDAY...
* WHAT...Northeast winds 25 to 40 mph with gusts up to 65 mph
expected. Isolated gusts to 70 mph across the Santa Monica
Mountains.
* WHERE...San Fernando and Santa Clarita Valleys and Santa
Monica Mountains. Strongest winds in the Santa Monica
Mountains, Porter Ranch, Chatsworth and Stevenson Ranch, and
the Santa Clarita Valley.
* WHEN...Until noon PDT Tuesday.
* IMPACTS...Damaging winds will blow down large objects such as
trees, power lines and temporary structures. Power outages are
expected. Travel will be difficult, especially for high
profile vehicles.

Information:
People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive. Be prepared to secure all loose outdoor furniture
in advance of the onset of strong winds. Monitor the latest
forecasts on NOAA Weather Radio or your favorite media source.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES

Areas Affected:
Los Angeles County San Fernando Valley - Los Angeles County San Gabriel Valley - Santa Clarita Valley - Ventura County Coastal Valleys - Ventura County Interior Valleys
Effective: Mon, 10/26 12:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 6:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR ALL OF LOS ANGELES AND VENTURA COUNTIES EXCEPT FOR
THE ANTELOPE VALLEY...
.Moderate to strong Santa Ana winds are expected to develop
across most of Los Angeles and Ventura Counties late tonight
through Tuesday, likely the strongest Santa Ana event we have
seen so far this season. The strongest winds are expected late
tonight through Monday evening, when damaging gusts of 60 to
80 mph can be expected in the mountains, gusts of 50 to 60 mph in
the wind prone valleys, and gusts of 35 to 50 mph from the
Ventura coast to Malibu and the Hollywood Hills. The downslope
winds will bring rapid drying, with widespread single digit
humidities by late Monday morning, and continuing through
Tuesday. In general, the offshore winds are expected to diminish
slightly later Monday night and Tuesday, but there is some
uncertainty in how much the winds will decrease during this time
period.
The moderate to strong Santa Ana winds coupled with very low
humidities and very dry fuels will likely bring the most dangerous
fire weather conditions we have seen since October 2019 to Los
Angeles and Ventura counties. A particularly dangerous situation
is expected for the Los Angeles County mountains Monday afternoon
and evening due to the unusual combination of damaging wind gusts
of 60 to 75 mph, single digit humidities, and extremely dry
vegetation. New fire ignitions will have the potential for very
rapid fire growth, extreme fire behavior, and long range spotting,
resulting in a significant threat to life and property.
...RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
6 PM PDT TUESDAY FOR STRONG NORTH TO NORTHEAST WINDS AND VERY LOW
RELATIVE HUMIDITY FOR THE VALLEYS OF LOS ANGELES AND VENTURA
COUNTIES...
* Winds...North to northeast 20 to 40 mph with damaging wind gusts
of 50 to 60 mph late tonight through Monday evening. Strongest
winds across the eastern Ventura valleys, Santa Clarita Valley,
northern/western portion of the San Fernando Valley, and the
foothills of the San Gabriel Valley. Winds likely to diminish
some Monday night into Tuesday morning, with gusts generally 30
to 45 mph, except local gusts to 50 mph in the foothills.
* Relative Humidity...Lowering rapidly to 15 to 25 percent late
tonight into early Monday morning, then widespread single
digit humidities by late Monday Morning through Tuesday.
Humidities potentially falling as low as 3 to 5 percent,
driest over Los Angeles county.
* Impacts...Due to the damaging wind gusts expected with this
event, there will be an increased risk of fire ignitions due
to downed trees and powerlines. If fire ignition occurs,
conditions will be favorable for very rapid fire spread, long
range spotting, and extreme fire behavior which would threaten
life and property.

Information:
A Red Flag Warning means that critical fire weather conditions
will likely occur. A combination of strong winds...very low
relative humidity...and critically dry fuels can contribute to
extreme fire behavior with very rapid fire spread. Use extreme
caution with potential fire ignition sources. Residents are urged
to assemble their emergency supply kit and know your evacuation
route.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES

Areas Affected:
Santa Monica Mountains Recreational Area - Ventura County Mountains, Los Padres National Forest
Effective: Mon, 10/26 12:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 6:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR ALL OF LOS ANGELES AND VENTURA COUNTIES EXCEPT FOR
THE ANTELOPE VALLEY...
.Moderate to strong Santa Ana winds are expected to develop
across most of Los Angeles and Ventura Counties late tonight
through Tuesday, likely the strongest Santa Ana event we have
seen so far this season. The strongest winds are expected late
tonight through Monday evening, when damaging gusts of 60 to
80 mph can be expected in the mountains, gusts of 50 to 60 mph in
the wind prone valleys, and gusts of 35 to 50 mph from the
Ventura coast to Malibu and the Hollywood Hills. The downslope
winds will bring rapid drying, with widespread single digit
humidities by late Monday morning, and continuing through
Tuesday. In general, the offshore winds are expected to diminish
slightly later Monday night and Tuesday, but there is some
uncertainty in how much the winds will decrease during this time
period.
The moderate to strong Santa Ana winds coupled with very low
humidities and very dry fuels will likely bring the most dangerous
fire weather conditions we have seen since October 2019 to Los
Angeles and Ventura counties. A particularly dangerous situation
is expected for the Los Angeles County mountains Monday afternoon
and evening due to the unusual combination of damaging wind gusts
of 60 to 75 mph, single digit humidities, and extremely dry
vegetation. New fire ignitions will have the potential for very
rapid fire growth, extreme fire behavior, and long range spotting,
resulting in a significant threat to life and property.
...RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
6 PM PDT TUESDAY FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE MOUNTAINS OF VENTURA COUNTY AND THE SANTA MONICA
MOUNTAINS...
* Winds...Northeast 30 to 45 mph with damaging gusts of 60 to 70
mph late tonight through early Monday afternoon. Winds likely to
diminish slightly Monday night into Tuesday morning, with gusts
generally 45 to 60 mph.
* Relative Humidity...Lowering rapidly to 15 to 25 percent late
tonight into early Monday morning, then widespread single
digit humidities by late Monday morning through Tuesday.
Humidities potentially falling as low as 3 to 5 percent,
driest over Los Angeles county.
* Impacts...Due to the damaging wind gusts expected with this
event, there will be an increased risk of fire ignitions due
to downed trees and powerlines. If fire ignition occurs,
conditions will be favorable for rapid fire spread, long range
spotting, and extreme fire behavior which would threaten life
and property.

Information:
A Red Flag Warning means that critical fire weather conditions
will likely occur. A combination of strong winds...very low
relative humidity...and critically dry fuels can contribute to
extreme fire behavior with very rapid fire spread. Use extreme
caution with potential fire ignition sources. Residents are urged
to assemble their emergency supply kit and know your evacuation
route.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES

Areas Affected:
Los Angeles County Mountains, Angeles National Forest
Effective: Mon, 10/26 12:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 6:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR ALL OF LOS ANGELES AND VENTURA COUNTIES EXCEPT FOR
THE ANTELOPE VALLEY...
.Moderate to strong Santa Ana winds are expected to develop
across most of Los Angeles and Ventura Counties late tonight
through Tuesday, likely the strongest Santa Ana event we have
seen so far this season. The strongest winds are expected late
tonight through Monday evening, when damaging gusts of 60 to
80 mph can be expected in the mountains, gusts of 50 to 60 mph in
the wind prone valleys, and gusts of 35 to 50 mph from the
Ventura coast to Malibu and the Hollywood Hills. The downslope
winds will bring rapid drying, with widespread single digit
humidities by late Monday morning, and continuing through
Tuesday. In general, the offshore winds are expected to diminish
slightly later Monday night and Tuesday, but there is some
uncertainty in how much the winds will decrease during this time
period.
The moderate to strong Santa Ana winds coupled with very low
humidities and very dry fuels will likely bring the most dangerous
fire weather conditions we have seen since October 2019 to Los
Angeles and Ventura counties. A particularly dangerous situation
is expected for the Los Angeles County mountains Monday afternoon
and evening due to the unusual combination of damaging wind gusts
of 60 to 75 mph, single digit humidities, and extremely dry
vegetation. New fire ignitions will have the potential for very
rapid fire growth, extreme fire behavior, and long range spotting,
resulting in a significant threat to life and property.
...RED FLAG WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
6 PM PDT TUESDAY FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR THE MOUNTAINS OF LOS ANGELES COUNTY...
* A particularly dangerous situation exists for the Los Angeles
County mountains from 2 pm to 11 pm Monday when there will
likely be an unusual combination of damaging wind gusts of 60 to
75 mph, single digit humidities, and extremely dry vegetation.
Any new fire ignition in this area will have very dangerous
fire spread with a significant threat to life and property.
* Winds...Northeast 30 to 45 mph with damaging gusts of 60 to 75
mph late tonight through Monday evening. Isolated gusts to 80
mph are possible on the peaks. Winds likely to diminish slightly
late Monday night into Tuesday morning, with gusts generally 45
to 65 mph.
* Relative Humidity...Lowering rapidly to 15 to 25 percent late
tonight into early Monday morning, then widespread single
digit humidities by late Monday morning through Tuesday.
Humidities potentially falling as low as 3 to 5 percent,
driest over Los Angeles county.
* Impacts...Due to the damaging wind gusts expected with this
event, there will be an increased risk of fire ignitions due
to downed trees and powerlines. If fire ignition occurs,
conditions will be favorable for rapid fire spread, long range
spotting, and extreme fire behavior which would threaten life
and property.

Information:
A Red Flag Warning means that critical fire weather conditions
will likely occur. A combination of strong winds...very low
relative humidity...and critically dry fuels can contribute to
extreme fire behavior with very rapid fire spread. Use extreme
caution with potential fire ignition sources. Residents are urged
to assemble their emergency supply kit and know your evacuation
route.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES

Areas Affected:
Los Angeles County Coast including Downtown Los Angeles - Ventura County Coast
Effective: Mon, 10/26 5:00am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 6:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
AFTERNOON FOR STRONG NORTHEAST WINDS AND VERY LOW RELATIVE
HUMIDITY FOR ALL OF LOS ANGELES AND VENTURA COUNTIES EXCEPT FOR
THE ANTELOPE VALLEY...
.Moderate to strong Santa Ana winds are expected to develop
across most of Los Angeles and Ventura Counties late tonight
through Tuesday, likely the strongest Santa Ana event we have
seen so far this season. The strongest winds are expected late
tonight through Monday evening, when damaging gusts of 60 to
80 mph can be expected in the mountains, gusts of 50 to 60 mph in
the wind prone valleys, and gusts of 35 to 50 mph from the
Ventura coast to Malibu and the Hollywood Hills. The downslope
winds will bring rapid drying, with widespread single digit
humidities by late Monday morning, and continuing through
Tuesday. In general, the offshore winds are expected to diminish
slightly later Monday night and Tuesday, but there is some
uncertainty in how much the winds will decrease during this time
period.
The moderate to strong Santa Ana winds coupled with very low
humidities and very dry fuels will likely bring the most dangerous
fire weather conditions we have seen since October 2019 to Los
Angeles and Ventura counties. A particularly dangerous situation
is expected for the Los Angeles County mountains Monday afternoon
and evening due to the unusual combination of damaging wind gusts
of 60 to 75 mph, single digit humidities, and extremely dry
vegetation. New fire ignitions will have the potential for very
rapid fire growth, extreme fire behavior, and long range spotting,
resulting in a significant threat to life and property.
...RED FLAG WARNING REMAINS IN EFFECT FROM 5 AM MONDAY TO 6 PM
PDT TUESDAY FOR GUSTY NORTH TO NORTHEAST WINDS AND VERY LOW
RELATIVE HUMIDITY FOR THE VENTURA COUNTY COAST AND MALIBU TO
HOLLYWOOD HILLS...
* Winds...North to northeast 20 to 35 mph with gusts 35 to to 50
mph on Monday. Strongest winds from Ventura to Malibu and the
Hollywood Hills Monday morning into mid afternoon Monday. Winds
shifting to onshore across the Ventura coast late Monday
afternoon and evening, with offshore winds redeveloping later
Monday night into Tuesday morning across the LA/Ventura coast,
with gusts generally 25 to 35 mph.
* Relative Humidity...Lowering rapidly to 15 to 25 percent Monday
morning, then widespread single digit humidities by late Monday
morning and afternoon, and again on Tuesday. Humidities
potentially falling as low as 3 to 5 percent, especially Los
Angeles county. Humidities will rise across the Ventura coast
late Monday afternoon and evening as competing onshore winds
return briefly.
* Impacts...If fire ignition occurs, conditions will be
favorable for very rapid fire spread, long range spotting, and
extreme fire behavior which would threaten life and property.

Information:
A Red Flag Warning means that critical fire weather conditions
will likely occur. A combination of strong winds...very low
relative humidity...and critically dry fuels can contribute to
extreme fire behavior with very rapid fire spread. Use extreme
caution with potential fire ignition sources. Residents are urged
to assemble their emergency supply kit and know your evacuation
route.

Wind Advisory  WIND ADVISORY   Wind Advisory
LOS ANGELES

Areas Affected:
Los Angeles County San Gabriel Valley
Effective: Mon, 10/26 1:08am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Mon, 10/26 8:00am Severity: Minor Certainty: Likely

 
Details:
...WIND ADVISORY NOW IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...HIGH WIND WARNING IN EFFECT FROM 8 AM THIS MORNING TO 3 PM PDT
THIS AFTERNOON...
* WHAT...For the Wind Advisory, areas of northeast winds 15 to 25
mph with gusts up to 40 mph expected. For the High Wind Warning,
north to northeast winds 25 to 40 mph with gusts up to 65 mph,
mainly in the foothills and near the 210 corridor. Isolated
gusts to 75 mph are possible.
* WHERE...San Gabriel Valley.
* WHEN...For the High Wind Warning, from 8 AM this morning to 3
PM PDT this afternoon. For the Wind Advisory, until 8 AM PDT
this morning.
* IMPACTS...Damaging winds could blow down large objects such as
trees, power lines, or temporary structures. Power outages are
possible. Travel could be difficult, especially for high
profile vehicles.
* ADDITIONAL DETAILS...The damaging wind potential is dependent
upon the development of mountain wave activity, which is likely,
but not a certainty.

Information:
People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

Wind Advisory  WIND ADVISORY   Wind Advisory
LOS ANGELES

Areas Affected:
Los Angeles County Coast including Downtown Los Angeles
Effective: Mon, 10/26 1:08am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 12:00pm Severity: Minor Certainty: Likely

 
Details:
...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON PDT TUESDAY...
* WHAT...North to northeast winds 20 to 30 mph with gusts up to
45 mph expected.
* WHERE...Los Angeles County Coast including Downtown Los
Angeles. Strongest from Malibu to the Hollywood Hills.
* WHEN...Until noon PDT Tuesday.
* IMPACTS...Gusty winds will blow around unsecured objects and
make driving difficult, especially for high profile vehicles.
Tree limbs and temporary structures could be blown down and a
few power outages may result.

Information:
Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Wind Advisory  WIND ADVISORY   Wind Advisory
LOS ANGELES

Areas Affected:
Catalina and Santa Barbara Islands
Effective: Mon, 10/26 1:08am Updated: Mon, 10/26 2:20am Urgency: Expected
Expires: Tue, 10/27 12:00pm Severity: Minor Certainty: Likely

 
Details:
...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON PDT TUESDAY...
* WHAT...Northeast to east winds 20 to 30 mph with gusts up to
45 mph expected.
* WHERE...Catalina and Santa Barbara Islands.
* WHEN...Until noon PDT Tuesday.
* IMPACTS...Gusty winds will blow around unsecured objects and
temporary structures. Large waves along east facing shores and
harbors could cause damage to vessels and structures. Tree
limbs could be blown down and a few power outages may result.
* ADDITIONAL DETAILS...Strongest winds will occur across the
east facing shore including Avalon Harbor.

Information:
Secure outdoor objects. Mariners should consider relocating
vessels to more protected harbors before the winds begin.

Hard Freeze Watch  HARD FREEZE WATCH   Hard Freeze Watch
LOS ANGELES

Areas Affected:
Antelope Valley
Effective: Tue, 10/27 3:00am Updated: Mon, 10/26 2:20am Urgency: Future
Expires: Tue, 10/27 9:00am Severity:  Moderate  Certainty: Possible

 
Details:
...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...HARD FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
MORNING...
* WHAT...For the Freeze Warning, low temperatures between 29 and
32 degrees are expected. For the Hard Freeze Watch, sub-
freezing temperatures between 25 and 28 are possible.
* WHERE...Antelope Valley.
* WHEN...For the Freeze Warning, until 9 AM PDT this morning.
For the Hard Freeze Watch, from late tonight through Tuesday
morning.
* IMPACTS...Freezing conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

Information:
Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.