Alert archive / California / Wind Advisories in 2020

Wind Advisory 88, NWS Los Angeles, CA

December 30, 2020Los Angeles County, California

NWS Los Angeles, CA issued this wind advisory at Dec 30, 2020, 1:26 PM PST for Los Angeles County, California. It took effect at Dec 30, 2020, 6:00 PM PST. It was in force for 44 hr.

The area

The counties it named.

The facts

Issued
Dec 30, 2020, 1:26 PM PST (21:26 UTC)
In effect from
Dec 30, 2020, 6:00 PM PST
Expired
Jan 1, 2021, 2:00 PM PST
In force
44 hr
Issued by
NWS Los Angeles, CA

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 21:23 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.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 9.4 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2020-12-30Temperature 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, San Diego, CA at 12:00Z on 2020-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939587897117Sfc1 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
3133 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

401 
WWUS76 KLOX 302126
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
126 PM PST Wed Dec 30 2020

CAZ039-052-311130-
/O.NEW.KLOX.WI.Y.0088.201231T0200Z-201231T2000Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
126 PM PST Wed Dec 30 2020

...WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON PST
THURSDAY...

* WHAT...North winds 20 to 30 mph with gusts up to 45 mph
  expected, strongest from Refugio west and in the hills above
  Montecito.

* WHERE...Santa Barbara County South Coast and Santa Barbara 
  County Mountains.

* WHEN...From 6 PM this evening to noon PST Thursday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ053-054-311130-
/O.NEW.KLOX.WI.Y.0088.201231T0200Z-201231T2000Z/
Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
126 PM PST Wed Dec 30 2020

...WIND ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON PST
THURSDAY...

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph
  expected, strongest through the I5 and Highway 33 corridors.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...From 6 PM this evening to noon PST Thursday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MW
8 follow-up statements
989 
WWUS76 KLOX 311116
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
316 AM PST Thu Dec 31 2020

CAZ046-088-311930-
/O.EXB.KLOX.WI.Y.0088.201231T1800Z-210101T0600Z/
Santa Monica Mountains Recreational Area-Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
316 AM PST Thu Dec 31 2020

...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 10 PM PST
THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Monica Mountains and Santa Clarita Valley.

* WHEN...From 10 AM this morning to 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ039-052-311930-
/O.EXT.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
316 AM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Barbara County South Coast and Mountains.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ053-054-311930-
/O.EXT.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
316 AM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph expected.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

RK
975 
WWUS76 KLOX 311117 CCA
NPWLOX

URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Los Angeles/Oxnard CA
317 AM PST Thu Dec 31 2020

CAZ046-088-311930-
/O.COR.KLOX.WI.Y.0088.201231T1800Z-210101T0600Z/
Santa Monica Mountains Recreational Area-Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
317 AM PST Thu Dec 31 2020

...WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 10 PM PST
THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Monica Mountains and Santa Clarita Valley.

* WHEN...From 10 AM this morning to 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...This advisory may need to be extended
  through Friday as the winds shift to northeasterly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ039-052-311930-
/O.EXT.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
317 AM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Barbara County South Coast and Mountains.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ053-054-311930-
/O.COR.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
317 AM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph expected.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...This advisory may need to be extended
  through Friday as the winds shift to northeasterly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

RK
353 
WWUS76 KLOX 311903
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1103 AM PST Thu Dec 31 2020

CAZ045-547-010400-
/O.EXB.KLOX.WI.Y.0088.210101T0600Z-210101T2200Z/
Ventura County Coastal Valleys-
Los Angeles County San Fernando Valley-
Including the cities of Thousand Oaks, Simi Valley, Moorpark, 
Newbury Park, Woodland Hills, Northridge, Burbank, 
and Universal City
1103 AM PST Thu Dec 31 2020

...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 PM PST
FRIDAY...

* WHAT...Northeasterly winds 20 to 30 mph with gusts to 50 mph 
  expected.

* WHERE...Ventura County Coastal Valleys and San Fernando Valley.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ046-054-010400-
/O.EXT.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Acton, Mount Wilson, and Sandberg
1103 AM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...North winds becoming northeasterly after 10 PM, 20 to 30
  mph with gusts to 50 mph expected.

* WHERE...Santa Monica Mountains and Santa Clarita Valley.

* WHEN...Until 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...This advisory may need to be extended 
  through Friday as the winds shift to northeasterly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ039-052-010400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
1103 AM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Barbara County South Coast and Mountains.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ053-010400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Ventura County Mountains-
Including the cities of Lockwood Valley and Mount Pinos
1103 AM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph 
  expected.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...This advisory may need to be extended 
  through Friday as the winds shift to northeasterly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ088-010400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
1103 AM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Monica Mountains and Santa Clarita Valley.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...This advisory may need to be extended 
  through Friday as the winds shift to northeasterly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
541 
WWUS76 KLOX 010342
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
742 PM PST Thu Dec 31 2020

CAZ044-011230-
/O.EXA.KLOX.WI.Y.0088.210101T0600Z-210101T2200Z/
Ventura County Interior Valleys-
Including the cities of Santa Paula, Fillmore, Ojai, and Piru
742 PM PST Thu Dec 31 2020

...WIND ADVISORY IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...Northeast winds 20 to 25 mph with gusts to 40 mph 
  expected.

* WHERE...Ventura County Interior Valleys.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ053-088-011230-
/O.EXT.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Mountains-Santa Clarita Valley-
Including the cities of Lockwood Valley, Mount Pinos, 
Santa Clarita, Newhall, and Valencia
742 PM PST Thu Dec 31 2020

...WIND ADVISORY NOW IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph 
  expected becoming northeast after midnight.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ039-052-010600-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
742 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...

* WHAT...North winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Santa Barbara County South Coast and Mountains.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ045-011230-
/O.CON.KLOX.WI.Y.0088.210101T0600Z-210101T2200Z/
Ventura County Coastal Valleys-
Including the cities of Thousand Oaks, Simi Valley, Moorpark, 
and Newbury Park
742 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 45 mph 
  expected.

* WHERE...Ventura County Coastal Valleys and San Fernando Valley.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ547-011230-
/O.CON.KLOX.WI.Y.0088.210101T0600Z-210101T2200Z/
Los Angeles County San Fernando Valley-
Including the cities of Woodland Hills, Northridge, Burbank, 
and Universal City
742 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 45 mph 
  expected.

* WHERE...Ventura County Coastal Valleys and San Fernando Valley.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ046-054-011230-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Acton, Mount Wilson, and Sandberg
742 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...North winds becoming northeast after 10 PM, 20 to 30 mph
  with gusts to 55 mph expected.

* WHERE...Santa Monica Mountains and Santa Clarita Valley.

* WHEN...Until 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Smith
515 
WWUS76 KLOX 010604
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1004 PM PST Thu Dec 31 2020

CAZ039-052-011200-
/O.EXP.KLOX.WI.Y.0088.000000T0000Z-210101T0600Z/
/O.NEW.KLOX.WI.Y.0001.210101T0604Z-210101T1200Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
1004 PM PST Thu Dec 31 2020

...WIND ADVISORY IN EFFECT UNTIL 4 AM PST FRIDAY...

* WHAT...North to northeast winds 20 to 30 mph with gusts to 50
  mph.

* WHERE...Santa Barbara County South Coast and Santa Barbara 
  County Mountains.

* WHEN...Until 4 AM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ046-053-054-011400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
1004 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...North winds 20 to 30 mph with gusts up to 55 mph 
  becoming northeast after midnight.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ044-045-011400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Including the cities of Santa Paula, Fillmore, Ojai, Piru, 
Thousand Oaks, Simi Valley, Moorpark, and Newbury Park
1004 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 45 mph.

* WHERE...Ventura County Interior Valleys.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ088-011400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Clarita Valley-
Including the cities of Santa Clarita, Newhall, and Valencia
1004 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts up to 50 mph.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains excluding the Santa Monica Range.

* WHEN...Until 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ547-011400-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Los Angeles County San Fernando Valley-
Including the cities of Woodland Hills, Northridge, Burbank, 
and Universal City
1004 PM PST Thu Dec 31 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST FRIDAY...

* WHAT...North to northeast winds 20 to 30 mph with gusts to 45 
  mph expected.

* WHERE...Ventura County Coastal Valleys and San Fernando Valley.

* WHEN...From 10 PM this evening to 2 PM PST Friday.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
461 
WWUS76 KLOX 011018
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
218 AM PST Fri Jan 1 2021

CAZ039-052-011130-
/O.CAN.KLOX.WI.Y.0001.000000T0000Z-210101T1200Z/
Santa Barbara County South Coast-Santa Barbara County Mountains-
Including the cities of Santa Barbara, Montecito, Carpinteria, 
San Marcos Pass, San Rafael Wilderness Area, 
and Dick Smith Wilderness Area
218 AM PST Fri Jan 1 2021

...WIND ADVISORY IS CANCELLED...

Winds will continue to quickly weaken this morning and become
easterly.

$$

CAZ040-012200-
/O.EXA.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Coast-
Including the cities of Ventura, Oxnard, and Camarillo
218 AM PST Fri Jan 1 2021

...WIND ADVISORY IN EFFECT UNTIL 2 PM PST THIS AFTERNOON...

* WHAT...Northeast winds 15 to 25 mph with gusts to 40 mph.

* WHERE...Ventura County Coast.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ046-053-054-012200-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
218 AM PST Fri Jan 1 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS
AFTERNOON...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph.

* WHERE...Ventura County Mountains and Los Angeles County
  Mountains including the Santa Monica Range.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and
  make driving difficult, especially for high profile vehicles.
  Tree limbs could be blown down and a few power outages may
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ044-045-088-547-012200-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Interior Valleys-Ventura County Coastal Valleys-
Santa Clarita Valley-Los Angeles County San Fernando Valley-
Including the cities of Santa Paula, Fillmore, Ojai, Piru, 
Thousand Oaks, Simi Valley, Moorpark, Newbury Park, 
Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, 
Burbank, and Universal City
218 AM PST Fri Jan 1 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS
AFTERNOON...

* WHAT...Northeast winds 15 to 25 mph with gusts to 40 mph.
  Isolated gusts to 50 mph possible in the hills.

* WHERE...Valleys of Santa Clarita, San Fernando, and Ventura 
  County.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

RK
055 
WWUS76 KLOX 011254
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
454 AM PST Fri Jan 1 2021

CAZ041-012200-
/O.EXA.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Los Angeles County Coast including Downtown Los Angeles-
Including the cities of Malibu, Santa Monica, Beverly Hills, 
Hollywood, and Long Beach
454 AM PST Fri Jan 1 2021

...WIND ADVISORY IN EFFECT UNTIL 2 PM PST THIS AFTERNOON...

* WHAT...Northeast winds 15 to 25 mph with gusts to 40 mph. 

* WHERE...Hills and canyons of the Los Angeles County Coast.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ046-053-054-012200-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
454 AM PST Fri Jan 1 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS
AFTERNOON...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph.

* WHERE...Ventura County Mountains and Los Angeles County 
  Mountains including the Santa Monica Range.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

CAZ040-044-045-088-547-012200-
/O.CON.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Coast-Ventura County Interior Valleys-
Ventura County Coastal Valleys-Santa Clarita Valley-
Los Angeles County San Fernando Valley-
Including the cities of Ventura, Oxnard, Camarillo, Santa Paula, 
Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, 
Newbury Park, Santa Clarita, Newhall, Valencia, Woodland Hills, 
Northridge, Burbank, and Universal City
454 AM PST Fri Jan 1 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST THIS
AFTERNOON...

* WHAT...Northeast winds 15 to 25 mph with gusts to 40 mph. 
  Isolated gusts to 50 mph possible in the hills.

* WHERE...Valleys of Santa Clarita, San Fernando, and Ventura 
  County.

* WHEN...Until 2 PM PST this afternoon.

* IMPACTS...Gusty winds will blow around unsecured objects and 
  make driving difficult, especially for high profile vehicles. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

RK
113 
WWUS76 KLOX 012155
NPWLOX

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
155 PM PST Fri Jan 1 2021

CAZ046-053-054-012300-
/O.EXP.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Santa Monica Mountains Recreational Area-Ventura County Mountains-
Los Angeles County Mountains excluding the Santa Monica Range-
Including the cities of Lockwood Valley, Mount Pinos, Acton, 
Mount Wilson, and Sandberg
155 PM PST Fri Jan 1 2021

...WIND ADVISORY WILL EXPIRE AT 2 PM PST THIS AFTERNOON...

While there isolated stations still experiencing advisory-level
wind gusts, especially around Malibu Hills, the widespread 
conditions have ended. Winds will continue to subside through the
afternoon.

$$

CAZ040-044-045-088-547-012300-
/O.EXP.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Ventura County Coast-Ventura County Interior Valleys-
Ventura County Coastal Valleys-Santa Clarita Valley-
Los Angeles County San Fernando Valley-
Including the cities of Ventura, Oxnard, Camarillo, Santa Paula, 
Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, 
Newbury Park, Santa Clarita, Newhall, Valencia, Woodland Hills, 
Northridge, Burbank, and Universal City
155 PM PST Fri Jan 1 2021

...WIND ADVISORY WILL EXPIRE AT 2 PM PST THIS AFTERNOON...

While there isolated stations still experiencing advisory-level
wind gusts, especially around Porter Ranch, the widespread 
conditions have ended. Winds will continue to subside through the
afternoon.

$$

CAZ041-012300-
/O.EXP.KLOX.WI.Y.0088.000000T0000Z-210101T2200Z/
Los Angeles County Coast including Downtown Los Angeles-
Including the cities of Malibu, Santa Monica, Beverly Hills, 
Hollywood, and Long Beach
155 PM PST Fri Jan 1 2021

...WIND ADVISORY WILL EXPIRE AT 2 PM PST THIS AFTERNOON...

Widespread advisory-level winds conditions have ended. Winds will 
continue to subside through the afternoon.

$$

What forecasters said that day

The local office's own words before this wind advisory 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 wind advisory went out at Dec 30, 1:12 PM PST, 14 minutes earlier.

Area forecast discussion, Dec 30, 1:12 PM PST, 14 minutes before
Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
112 PM PST Wed Dec 30 2020

.SYNOPSIS...30/854 AM.

Dry and warmer weather is expected through Friday along with
breezy north to northeast winds at times. A series of weather
systems will bring increasing chances of rain and mountain snow
late in the weekend into next week. High surf is expected along
the Central Coast through at least Friday.

&&

.SHORT TERM (TDY-SAT)...30/1249 PM.

Breezy northerly winds continuing today though subsiding a bit
this afternoon. Expecting another resurgence tonight into Thursday
as a weak trough passes through and models show enough upper
support and surface gradients to warrant a wind advisory for srn
SB County and the LA/Ventura mtns. May get a few hours of advisory
level winds in the western Antelope Valley as well later tonight
but will hold off on that for now. The northerly flow increase
tonight into Thursday will also be accompanied by some moisture
that may get enough of a lift on the north facing mountain slopes
to spawn a few light showers there Thursday. Snow levels will be
low enough to possibly get a dusting of snow over the Grapevine
and maybe an inch over the higher surrounding peaks but it
shouldn't pose significant travel concerns. Will run the wind
advisory until noon Thu as the typical late mid to late afternoon
onshore trend bring winds below advisory levels.

A second trough Thursday night into Friday will take an inland
trajectory and shift winds and gradients to northeast and create a
more traditional Santa Ana event. Should be a solid advisory
level wind event for LA/Ventura Counties with possibly some
isolated gusts to near 60 in the mountains Friday morning.
Offshore flow will warm areas near the coast but not much change
interior areas with some cold air lingering from the trough
passage offsetting the ridging aloft.

Saturday looks quiet with just some high clouds at times. Cooler
temps at the coast with onshore trends but warmer inland with weak
ridging aloft.

.LONG TERM (SUN-WED)...30/102 PM.

Another quiet day Sunday for the most part though some increasing
clouds and a chance of light rain for mainly western SLO County as
moisture and some warm advection arrive ahead of the next system.
Dry elsewhere through Sunday night. Some ECMWF ensemble solutions,
including the deterministic model are showing some very light
precip making it as far south as LA County Monday afternoon and a
farther south dip of the jet stream as the trough moves through.
Either way a very low impact event with higher snow levels than
with the previous systems.

Forecast gets murkier Tue and beyond as models are struggling
with the details which likely explains the relatively conservative
NBM pops. Chances are still very good that all areas will get
some additional precipitation by Wednesday evening but there's a
large spread of timing and strength possibilities. Some of the
solutions are showing a decent tap of moisture to the southwest
indicating a possible low end atmospheric river event, mainly just
northern areas but the 12z runs have scaled back on that
somewhat.

Another good chance of rain and mountain snow by around next
Friday as well.

&&

.AVIATION...30/1811Z.

At 1658Z, there was no marine layer at KLAX.

Generally high confidence in the current forecast. VFR conditions
are expected through the period. There is an outside chance of
LLWS and UDDFs through the period.

KLAX...VFR conditions are expected through the period. Any east or
northerly winds should remain less than 7 knots through the
period.

KBUR...VFR conditions are expected through the period. No wind
impacts are expected at this time.

&&

.MARINE...30/1255 PM.

Low confidence in the current forecast. The greatest uncertainty
concerns the timing and exact placement of stronger winds.

Across the northern waters and south to San Nicolas Island and
west of the Channel Islands, seas will build and winds will
increase across the waters from tonight through Thursday evening.
There is a 60-70 percent chance of gales from early Thursday
morning through Thursday night, especially from Point Conception
south to San Nicolas Island. A large northwest swell is expected
to move into the waters tonight into Thursday, building to near
15 feet at 16 seconds by Thursday night. Another slightly larger
northwest swell will affect the waters Saturday and Sunday.

Inside the southern California bight, marginal offshore winds will
linger across the Santa Monica Bay this morning, then winds and
seas will increase across mainly the western portions of the bight
to SCA levels tonight through Thursday night. However, portions of
the bight neighboring the Santa Monica Mountains may also reach
SCA speeds/gusts. Winds are expected to shift to NNE by Friday
morning and bring another chance of SCA conditions nearshore from
Point Mugu to Santa Monica, and possibly from Newport Beach out to
near Catalina Island.

&&

.BEACHES...30/1255 PM.

A couple of large, fairly long period west to northwest swells
will push through the coastal waters through the weekend,
bringing high surf and dangerous rip currents to many west and
northwest facing beaches.

A High Surf Advisory remains in effect through Friday for the
northwest facing shoreline of the central coast. The breakers may
get close to warning criteria over the weekend.

A High Surf Advisory may be necessary for the Ventura County
beaches beginning Thursday and continuing through the weekend. At
this time, if an advisory becomes necessary by Thursday, the
range of wave heights would be from 4 to 7 feet. Even higher surf
becomes possible Friday and Saturday. The high surf is expected
to spread to the west facing beaches of Los Angeles County on
Friday or Saturday and continue through the weekend. Even west
facing beaches of the south coast of Santa Barbara will see
elevated surf of 3 to 6 feet. Dangerous rip currents are expected
and swimmers should remain out of the water. Be sure to stay off
rock walls and jetties. High surf may return to these areas as
early as Thursday with even larger surf possible over the weekend.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...High Surf Advisory in effect until 2 PM PST Friday for zones
      34-35. (See LAXCFWLOX).
     Wind Advisory in effect from 6 PM this evening to noon PST
      Thursday for zones 39-52>54. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 3 AM PST Friday for
      zones 645-650. (See LAXMWWLOX).
     Small Craft Advisory in effect from 10 PM this evening to 3
      AM PST Friday for zone 655. (See LAXMWWLOX).
     Small Craft Advisory in effect until 9 AM PST Thursday for
      zone 670. (See LAXMWWLOX).
     Gale Watch in effect from Thursday morning through late
      Thursday night for zone 670. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PST Thursday for
      zones 673-676. (See LAXMWWLOX).
     Gale Watch in effect from late tonight through late Thursday
      night for zones 673-676. (See LAXMWWLOX).

&&

.HAZARD POTENTIAL OUTLOOK (SAT-WED).

Periods of moderate to locally heavy rain and mountain snow are
possible late Tuesday into Wednesday next week, creating hazards
to travelers.

&&

PUBLIC...MW
AVIATION...Sweet/Hall
MARINE...Sweet
BEACHES...Sweet
SYNOPSIS...MW

weather.gov/losangeles

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 30, 2:16 AM PSTGale WatchLOX12 hr
Dec 30, 2:16 AM PSTSmall Craft AdvisoryLOX58 hr
Dec 30, 2:21 PM PSTGale WarningLOX31 hr

Nearby

Wind Advisories in California, 2020Every wind advisory in 2020

Sources

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