High Wind in California, April 9 to 10, 2019

Name: High Wind in California, April 9 to 10, 2019
Start: 2019-04-09T23:20
End: 2019-04-10T03:00
Location: California

April 9 to 10, 2019 · NWS LOX · 2 events in 2 counties and zones

Strong and gusty northwest to north winds impacted the mountains of Ventura and Los Angeles counties. Wind gusts up to 74 MPH were reported.

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS LOX wrote it up.

Strong and gusty northwest to north winds impacted the mountains of Ventura and Los Angeles counties. Wind gusts up to 74 MPH were reported.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Apr 9, 7:21 PM PST, 3 hours 59 minutes earlier.

Area forecast discussion, Apr 9, 7:21 PM PST, 3 hours 59 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
821 PM PDT Tue Apr 9 2019

.SYNOPSIS...09/702 PM.

Tonight will be mostly clear with gusty northerly winds across the
area, especially in the mountains. Winds will remain gusty
through Friday, but will be strongest early Wednesday. There is a
chance of showers on northern slopes on Friday, otherwise
conditions will remain dry and cool through the week.

&&

.SHORT TERM (TUE-FRI)...09/820 PM.

***UPDATE***

The trof axis has moved through the area and ushered in a good
dose of cold air advection which drove the strong upper level
winds down to the sfc. Much of the area saw frequent gusts to 45
mph with 60 to 65 mph gusts in the mtns. The gradient to KBFL is 5
mb offshore which is also helping the north winds along. KLAX has
a 20 kt crosswind which is making the landings trickier than
normal.

The cool air advection was tempered a bit by the offshore flow
and there was not quite as much cooling across the coast and vlys
of LA/VTA county but the interior cooled between 15 and 20
degrees.

Forecast is in good shape but will update the fcst to clean up the
headlines and some of the wind wording.

***From Previous Discussion***

Northerly winds continue to be the primary weather feature across
the area and likely will remain that way through Friday. Strongest
winds still appear to be tonight into early Wednesday as upper
support and surface gradients are peaking, though both factors
will remain favorable through the end of the week with possibly a
secondary peak late Thu into Fri following the passage of the next
trough which also will take a more inside track. Warnings look
good for the mountains tonight, especially SB County and near the
I5 corridor. Advisories in most other areas. Winds are expected to
decrease later tonight and Wednesday morning but will likely be
extending the SB County and I5 corridor advisories and warnings
through at least Wednesday morning and very possibly through as
late as Thursday night, though the mountain winds should drop off
to more advisory levels after tomorrow morning.

We did see a pretty big drop in temperatures today as the trough
brought in much cooler air aloft and west/east gradients turned
strongly onshore. However the northerly winds will offset some of
that cooling such that temps will remain at or slightly above
seasonal norms for coast/valley areas south of Pt Conception
through at least Friday.

Models and their ensembles now are trending farther east with the
Friday trough so odds strongly favor any precip being confined to
the north facing slopes similar to this morning.

.LONG TERM (SAT-TUE)...09/213 PM.

A little ridge will develop Saturday for slight warming but
onshore flow is expected to return Sunday and Monday as a weak
trough pushes into the west coast. That should bring temperatures
back to near normal levels with gusty onshore winds in the
Antelope Valley. A little warming expected Tuesday as onshore flow
weakens and a weak ridge develops.

&&

.AVIATION...09/2358Z.

At 2300Z at KLAX...There was a marine inversion based at 400 feet
with a top at 1200 feet with a temperature of 20 degrees C.

High confidence in VFR conditions. The main issue will be the
widespread, gusty northerly winds across much of the forecast
area. There could be some moderate to strong UDDF along ridgelines
through Wednesday morning. Gusty W-N winds will have the
potential to cause LLWS/turbulence across the area. Coordination
with CWSU resulted in a slightly more aggressive stance toward
north cross winds for this evening.

KLAX...Moderate confidence in 00z TAF. Moderately strong NW-N
crosswinds through 10Z with direction between 320-350 degrees and
gusts to around 25 knots. There is a 20% chance of gusts up to 30
knots at times during this period. Winds expected to remain NNW
after 10Z and will decrease some, but gusts 20-22 knots likely to
continue through 18Z-20Z.

BUR...Moderate to high confidence in 00Z TAF. Gusty NW winds with
turbulence and LLWS. Strongest winds forecast 00Z-06Z but could
persist for 2 hours past this time.

&&

.MARINE...09/805 PM.

For the Outer Waters...high confidence in Gales continuing through
Friday night. Northwest wind gusts expected to reach 40 knots,
with potential for isolated 45 knots or more at times through
tonight. Late Wednesday night, the winds may subside just below
gales for a few hours, but they are expected to increase again
Thursday and continue through Friday night.

For the Inner Waters north of Point Sal... Gale force winds
should continue through Wednesday evening. There could be a brief
time when when Gales lower to Small Craft Advisory (SCA) levels
early Wednesday morning. After that time, SCA level winds will
continue each afternoon and evening through Friday evening. Winds
will be strongest in the western portion.

For the Inner Waters south of Point Conception... Gale force
wind gusts between 35 to 40 knots are expected through late
tonight. After that time, SCA level winds will continue at times
through Friday.

&&

.BEACHES...09/658 PM.

A High Surf Advisory is in effect through 7 AM Wednesday for the
west facing beaches of LA/Ventura Counties, and now for the
Central Coast. Strong winds are building large, short period
seas across the Coastal waters with surf expected to reach 10 feet
or higher along the Central Coast, and up to 7 feet south of Point
Conception. The highest surf will be on beaches with west to
northwest exposure. The waves will be extremely rough, and strong
rip currents will be common. The surf should subside somewhat
Wednesday morning as winds diminish some, but high surf may occur
again Wednesday afternoon as winds increase.

High surf poses a risk to anyone that enters the ocean. Strong
and deadly rip currents will likely occur with this event. People
are urged to stay off rock jetties, as there is a long history of
fatalities from people that go on the rocks and into tide pools
during high surf events.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...High Surf Advisory in effect until 7 AM PDT Wednesday for
      zones 34-35-40-41-87. (See LAXCFWLOX).
     Wind Advisory in effect until 3 AM PDT Wednesday for zones
      37-38-40-41-44>46-51-59-87-88-547. (See LAXNPWLOX).
     Wind Advisory in effect until 11 AM PDT Thursday for zone 39. (See LAXNPWLOX).
     Beach Hazards Statement in effect until 7 AM PDT Wednesday
      for zone 39. (See LAXCFWLOX).
     High Wind Warning in effect until 11 AM PDT Wednesday for
      zones 52>54. (See LAXNPWLOX).
     Wind Advisory in effect from 11 AM Wednesday to 11 AM PDT
      Thursday for zones 52>54. (See LAXNPWLOX).
PZ...Gale Warning in effect until 9 PM PDT Wednesday for zone 645. (See LAXMWWLOX).
     Gale Warning in effect until 3 AM PDT Wednesday for zones
      650-655. (See LAXMWWLOX).
     Gale Warning in effect until 3 AM PDT Thursday for zones
      670-673-676. (See LAXMWWLOX).

&&

.HAZARD POTENTIAL OUTLOOK (FRI-TUE).

Gusty northerly winds are expected through early Friday,
especially for the mountains and southern Santa Barbara County.
High surf is possible on Central Coast beaches Friday.

&&

PUBLIC...MW/Rorke
AVIATION...Smith
MARINE...Smith
BEACHES...Smith
SYNOPSIS...Stewart

weather.gov/losangeles

In the hours before

Local storm report, Apr 9, 10:34 PM PST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1134 PM PDT TUE APR 9 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0908 PM     NON-TSTM WND DMG LOS ANGELES             34.04N 118.30W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            SILVERLAKE, LOS FELIZ, MID-WILSHIRE AND
            FAIRFAX DISTRICT AREAS. POWER OUTAGES DUE TO
            WIND.

0823 PM     NON-TSTM WND DMG POINT DUME              34.01N 118.80W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            40-FOOT TREE DOWNED BY WINDS.

0755 PM     NON-TSTM WND DMG BALDWIN PARK            34.05N 117.91W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            LARGE TREE FELL ON HOUSE.

0700 PM     NON-TSTM WND DMG VAN NUYS                34.18N 118.45W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            POWERLINES DOWN IN VAN NUYS.

1058 PM     NON-TSTM WND GST 2 E ALTADENA            34.20N 118.09W
04/09/2019  M70 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION HNGC1 HENNIGER FLATS.

1057 PM     NON-TSTM WND GST 6 SSW CASTAIC LAKE      34.57N 118.74W
04/09/2019  M67 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION WTPC1 WHITAKER PEAK.

1055 PM     NON-TSTM WND GST 5 NNE SAN FERNANDO      34.35N 118.42W
04/09/2019  M72 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION CNIC1 CAMP NINE.

1016 PM     NON-TSTM WND GST 4 E POINT MUGU          34.08N 118.99W
04/09/2019  M61 MPH          VENTURA            CA   MESONET

            MESONET STATION FW0112 MALIBU.

0920 PM     NON-TSTM WND GST 4 N CHATSWORTH          34.32N 118.58W
04/09/2019  M63 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION SE079 OAT MOUNTAIN.

0753 PM     NON-TSTM WND GST 6 NE PYRAMID LAKE       34.75N 118.72W
04/09/2019  M66 MPH          LOS ANGELES        CA   ASOS

            ASOS STATION KSDB SANDBERG.

0653 PM     NON-TSTM WND GST 10 ESE CASTAIC LAKE     34.58N 118.55W
04/09/2019  M63 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION WMSC1 WARM SPRINGS.

0440 PM     NON-TSTM WND GST 29 SSW LA CONCHITA      34.00N 119.69W
04/09/2019  M58 MPH          SANTA BARBARA      CA   MESONET

            MESONET STATION UCSC CENTRAL SANTA CRUZ
            ISLAND.

1050 PM     NON-TSTM WND GST 1 NE LOCKWOOD VALLEY    34.76N 119.07W
04/09/2019  M59 MPH          VENTURA            CA   UTILITY COMPANY

            NORTHWEST WINDS 31 MPH GUSTING TO 59 MPH
            NEAR LOCKWOOD VALLEY, ELEVATION 5165 FEET.

1131 PM     NON-TSTM WND GST 5 S SANTA CLARITA       34.34N 118.50W
04/09/2019  M59 MPH          LOS ANGELES        CA   UTILITY COMPANY

            NORTH-NORTHWEST WINDS 35 MPH GUSTING TO 59
            MPH AT NEWHALL PASS, ELEVATION 2090 FEET.

&&

Local storm report, Apr 9, 10:39 PM PST, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1139 PM PDT TUE APR 9 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 PM     NON-TSTM WND GST 6 SSE OJAI              34.37N 119.19W
04/09/2019  M55 MPH          VENTURA            CA   MESONET

            MESONET STATION RSVC1 ROSE VALLEY.

1055 PM     NON-TSTM WND GST 3 NNW BEVERLY HILLS     34.12N 118.41W
04/09/2019  M55 MPH          LOS ANGELES        CA   MESONET

            MESONET STATION BVRC1 BEVERLY HILLS.

0945 PM     NON-TSTM WND GST 5 N LA CONCHITA         34.42N 119.42W
04/09/2019  M55 MPH          VENTURA            CA   MESONET

            MESONET STATION LGRC1 LA GRANADA MOUNTAIN.

0924 PM     NON-TSTM WND GST 7 NNE OJAI              34.54N 119.18W
04/09/2019  M56 MPH          VENTURA            CA   MESONET

            MESONET STATION ROVC1 ROSE VALLEY RAWS.

0309 PM     NON-TSTM WND GST 2 NW GAVIOTA            34.49N 120.24W
04/09/2019  M56 MPH          SANTA BARBARA      CA   MESONET

            MESONET STATION GVTC1 GAVIOTA HILLS RAWS.

&&

HALL

Local storm report, Apr 9, 10:48 PM PST, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1148 PM PDT TUE APR 9 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1029 PM     HIGH SUST WINDS  5 N SANTA BARBARA       34.50N 119.73W
04/09/2019  M45 MPH          SANTA BARBARA      CA   MESONET

            MESONET STATION LCPC1 SANTA BARBARA SANTA
            BARBARA.

0824 PM     HIGH SUST WINDS  5 NNE BIG PINE MOUNTAIN 34.77N 119.63W
04/09/2019  M42 MPH          SANTA BARBARA      CA   MESONET

            MESONET STATION SBTC1 NEW CUYAMA SANTA
            BARBARA.

0637 PM     HIGH SUST WINDS  4 WNW REFUGIO STATE BEA 34.48N 120.13W
04/09/2019  M54 MPH          SANTA BARBARA      CA   MESONET

            MESONET STATION TJGC1 GAVIOTA COAST.

1210 AM     HIGH SUST WINDS  2 N PALMDALE            34.63N 118.08W
04/09/2019  M43 MPH          LOS ANGELES        CA   ASOS

            ASOS STATION KPMD PALMDALE APT.

&&

HALL

Local storm report, Apr 9, 11:03 PM PST, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1203 AM PDT WED APR 10 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1141 PM     NON-TSTM WND DMG 3 ENE VAN NUYS          34.20N 118.40W
04/09/2019                   LOS ANGELES        CA   LAW ENFORCEMENT

            LARGE TREE BRANCH BLOCKING OFFRAMP AT HWY
            170 AND SHERMAN WAY.

1131 PM     NON-TSTM WND DMG 3 NW LONG BEACH         33.82N 118.19W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            TREE DOWN IN SLOW LANE OF INTERSTATE 405
            NEAR LONG BEACH BLVD.

1123 PM     NON-TSTM WND DMG 2 SW VAN NUYS           34.16N 118.47W
04/09/2019                   LOS ANGELES        CA   PUBLIC

            TREE BLOCKING INTERCHANGE OF HIGHWAY 101 AND
            INTERSTATE 405.

1107 PM     NON-TSTM WND DMG 2 W OJAI                34.45N 119.28W
04/09/2019                   VENTURA            CA   LAW ENFORCEMENT

            TREE DOWN BLOCKING ROADWAY NEAR ENCINAL AVE
            AND EL ROBLAR DR.

0927 PM     NON-TSTM WND DMG 2 NE LONG BEACH         33.81N 118.14W
04/09/2019                   LOS ANGELES        CA   LAW ENFORCEMENT

            TREE DOWN ON OFF-RAMP OF INTERSTATE 405 AT
            LAKEWOOD BLVD.

0921 PM     NON-TSTM WND DMG 1 N COMPTON             33.91N 118.23W
04/09/2019                   LOS ANGELES        CA   LAW ENFORCEMENT

            TREE BLOCKING ROADWAY ON 2400 BLOCK OF E
            HATCHWAY ST. TREE HIT PARKED VEHICLE.

&&

Local storm report, Apr 9, 11:04 PM PST, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1204 AM PDT WED APR 10 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1131 PM     NON-TSTM WND DMG 3 NW LONG BEACH         33.82N 118.19W
04/09/2019                   LOS ANGELES        CA   LAW ENFORCEMENT

            CORRECTS PREVIOUS NON-TSTM WND DMG REPORT
            FROM 3 NW LONG BEACH. TREE DOWN IN SLOW LANE
            OF INTERSTATE 405 NEAR LONG BEACH BLVD.

&&

Event by event

2 high wind. Local standard time, as filed.

High Wind, Los Angeles County Mountains Excluding the Santa Monica Range

When: April 9, 11:20 PM PST to April 10, 3:00 AM PST
Where: Los Angeles County Mountains Excluding the Santa Monica Range forecast zone
Measured: 64 kt (74 mph) measured gust
Reported by: RAWS

Strong and gusty northwest to north winds impacted the mountains of Los Angeles county. Some peak wind gusts from the local RAWS network include: Camp Nine (Gust 74 MPH), Warm Springs (Gust 62 MPH), Sandberg (Gust 62 MPH) and Oat Mountain (Gust 62 MPH).

High Wind, Ventura County Mountains

When: April 9, 11:20 PM PST to April 10, 3:00 AM PST
Where: Ventura County Mountains forecast zone
Measured: 65 kt (75 mph) estimated gust
Reported by: RAWS

Strong and gusty northwest to north winds impacted the mountains of Ventura county. Wind gusts up to 65 MPH were reported.

What these are

High Wind: Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in California in 2019 Every state in 2019 This day in weather history Warnings in California, April 2019

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 824498, 824500.