Weather Alerts for Los Angeles County

Issued by the National Weather Service

Freeze Warning  FREEZE WARNING   Freeze Warning
LOS ANGELES COUNTY

Areas Affected:
Antelope Valley
Effective: Tue, 1/21 10:43pm Updated: Wed, 1/22 12:30am Urgency: Expected
Expires: Wed, 1/22 9:00am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...Very cold temperatures between 15 and 20 degrees expected
tonight through Wednesday morning.

* WHERE...Antelope Valley.

* WHEN...Until 9 AM PST Wednesday.

* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

Information:
Take steps now to protect tender plants from the cold.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES COUNTY

Areas Affected:
Western Santa Monica Mountains Recreational Area - Eastern Santa Monica Mountains Recreational Area - Santa Susana Mountains - Southern Ventura County Mountains - Northern Ventura County Mountains - Interstate 5 Corridor - Western San Gabriel Mountains and Highway 14 Corridor - Eastern San Gabriel Mountains
Effective: Tue, 1/21 2:35pm Updated: Wed, 1/22 12:30am Urgency: Expected
Expires: Wed, 1/22 10:30am Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT THROUGH THURSDAY 8 PM PST FOR MOST
OF LOS ANGELES AND VENTURA COUNTIES FOR EXTREMELY LOW RELATIVE
HUMIDITY AND PERIODS OF GUSTY OFFSHORE WINDS...

.The Particularly Dangerous Situation (PDS) Red Flag Warning has
ended, but dangerous fire weather conditions will persist through
Thursday or Friday. Northeast winds will weaken and shrink in
coverage tonight into Wednesday, but will remain locally gusty in
the favored hills and mountains. Winds will strengthen and expand
once again Wednesday afternoon through Thursday morning, then
lower and shrink in coverage again Thursday Night into Friday.
Meanwhile, extremely low humidities will persist with minimums
under 10 percent over much of the area and poor overnight
recoveries. While many areas will see a lull in the winds tonight
into Wednesday, the extremely dry conditions will persist and
winds will increase again later Wednesday. As result, the Red Flag
Warning has been extended over most of Los Angeles and Ventura
Counties through 8pm Thursday. Some of the windiest areas may
need to be extended into Friday as well.

The National Weather Service in Los Angeles/Oxnard has cancelled
the Fire Weather Watch, and replaced it with this Red Flag Warning.

* WINDS...Northeast 15 to 25 mph with gusts to 40 mph will
increase to 20 to 30 mph with gusts to 50 mph by Wednesday
afternoon and continue through Thursday. Isolated gusts of 50 to
65 mph in the favored locations.

* RELATIVE HUMIDITY...Daily minimums of 2 to 10 percent common
with very poor to minimal overnight recoveries.

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

* ADDITIONAL DETAILS...Lingering winds and very dry conditions may
require an extension of this Red Flag Warning into Friday.

Information:
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.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
LOS ANGELES COUNTY

Areas Affected:
Santa Clarita Valley - Ventura County Beaches - Ventura County Inland Coast - Central Ventura County Valleys - Malibu Coast - Calabasas and Agoura Hills - Western San Fernando Valley - Eastern San Fernando Valley - Southeastern Ventura County Valleys
Effective: Tue, 1/21 2:35pm Updated: Wed, 1/22 12:30am Urgency: Expected
Expires: Wed, 1/22 10:30am Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING IN EFFECT THROUGH THURSDAY 8 PM PST FOR MOST
OF LOS ANGELES AND VENTURA COUNTIES FOR EXTREMELY LOW RELATIVE
HUMIDITY AND PERIODS OF GUSTY OFFSHORE WINDS...

.The Particularly Dangerous Situation (PDS) Red Flag Warning has
ended, but dangerous fire weather conditions will persist through
Thursday or Friday. Northeast winds will weaken and shrink in
coverage tonight into Wednesday, but will remain locally gusty in
the favored hills and mountains. Winds will strengthen and expand
once again Wednesday afternoon through Thursday morning, then
lower and shrink in coverage again Thursday Night into Friday.
Meanwhile, extremely low humidities will persist with minimums
under 10 percent over much of the area and poor overnight
recoveries. While many areas will see a lull in the winds tonight
into Wednesday, the extremely dry conditions will persist and
winds will increase again later Wednesday. As result, the Red Flag
Warning has been extended over most of Los Angeles and Ventura
Counties through 8pm Thursday. Some of the windiest areas may
need to be extended into Friday as well.

The National Weather Service in Los Angeles/Oxnard has cancelled
the Fire Weather Watch, and replaced it with this Red Flag Warning.

* WINDS...Northeast will peak at 20 to 30 mph with gusts to 50 mph
Wednesday afternoon through Thursday, after a lull later
tonight into Wednesday.

* RELATIVE HUMIDITY...Daily minimums of 2 to 10 percent common
with very poor to minimal overnight recoveries.

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

Information:
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.

Wind Advisory  WIND ADVISORY   Wind Advisory
LOS ANGELES COUNTY

Areas Affected:
Santa Susana Mountains - Western San Gabriel Mountains and Highway 14 Corridor
Effective: Tue, 1/21 10:43pm Updated: Wed, 1/22 12:30am Urgency: Expected
Expires: Wed, 1/22 10:45am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...For the Wind Advisory, northeast winds 15 to 30 mph with
gusts up to 45 mph. For the High Wind Watch, northeast winds 35 to
50 mph with gusts up to 65 mph possible.

* WHERE...Santa Susana Mountains and Western San Gabriel Mountains
and Highway 14 Corridor.

* WHEN...For the Wind Advisory, until 6 PM PST Wednesday. For the
High Wind Watch, from Wednesday evening through Thursday afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles. Gusty winds will blow around
unsecured objects. Tree limbs could be blown down and a few power
outages may result.

Information:
Monitor the latest forecasts and warnings for updates.

Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

High Wind Watch  HIGH WIND WATCH   High Wind Watch
LOS ANGELES COUNTY

Areas Affected:
Santa Clarita Valley - Western Santa Monica Mountains Recreational Area
Effective: Tue, 1/21 10:43pm Updated: Wed, 1/22 12:30am Urgency: Future
Expires: Wed, 1/22 10:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Northeast winds 35 to 50 mph with gusts up to 65 mph
possible.

* WHERE...Santa Clarita Valley and Western Santa Monica Mountains
Recreational Area.

* WHEN...From late Wednesday night through Thursday afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.

Information:
Monitor the latest forecasts and warnings for updates.

High Wind Watch  HIGH WIND WATCH   High Wind Watch
LOS ANGELES COUNTY

Areas Affected:
Santa Susana Mountains - Western San Gabriel Mountains and Highway 14 Corridor
Effective: Tue, 1/21 10:43pm Updated: Wed, 1/22 12:30am Urgency: Future
Expires: Wed, 1/22 10:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...For the Wind Advisory, northeast winds 15 to 30 mph with
gusts up to 45 mph. For the High Wind Watch, northeast winds 35 to
50 mph with gusts up to 65 mph possible.

* WHERE...Santa Susana Mountains and Western San Gabriel Mountains
and Highway 14 Corridor.

* WHEN...For the Wind Advisory, until 6 PM PST Wednesday. For the
High Wind Watch, from Wednesday evening through Thursday afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles. Gusty winds will blow around
unsecured objects. Tree limbs could be blown down and a few power
outages may result.

Information:
Monitor the latest forecasts and warnings for updates.

Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

High Wind Watch  HIGH WIND WATCH   High Wind Watch
LOS ANGELES COUNTY

Areas Affected:
Southern Ventura County Mountains - Interstate 5 Corridor - Eastern San Gabriel Mountains
Effective: Tue, 1/21 10:43pm Updated: Wed, 1/22 12:30am Urgency: Future
Expires: Wed, 1/22 10:45am Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Northeast winds 35 to 50 mph with gusts up to 65 mph
possible.

* WHERE...Eastern San Gabriel Mountains, Interstate 5 Corridor, and
Southern Ventura County Mountains.

* WHEN...From Wednesday evening through Thursday afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could b0e difficult,
especially for high profile vehicles.

Information:
Monitor the latest forecasts and warnings for updates.