Alert archive / California / High Surf Advisories in 2016

High Surf Advisory 15, NWS Los Angeles, CA

March 6, 2016Los Angeles County, California

NWS Los Angeles, CA issued this high surf advisory at Mar 6, 2016, 3:55 AM PST for Los Angeles County, California. It took effect at Mar 6, 2016, 6:17 AM PST. It was in force for 3 days.

The area

The counties it named.

The facts

Issued
Mar 6, 2016, 3:55 AM PST (11:55 UTC)
In effect from
Mar 6, 2016, 6:17 AM PST
Expired
Mar 9, 2016, 9:00 AM PST
In force
3 days
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 11:56 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 00:00Z, 11.9 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 00:00Z on 2016-03-06Temperature 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 00:00Z on 2016-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.1939587897Sfc1 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
1279 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high surf 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 high surf advisory went out at Mar 6, 3:49 AM PST, 6 minutes earlier.

Area forecast discussion, Mar 6, 3:49 AM PST, 6 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Mar 5, 6:00 PM PST, 9 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 PM PST SAT MAR 5 2016

CAZ034>041-044>046-051>054-059-087-088-547-548-061400-
SAN LUIS OBISPO COUNTY CENTRAL COAST-
SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY-
SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY-
SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-
VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-
SANTA MONICA MOUNTAINS RECREATIONAL AREA-
SAN LUIS OBISPO COUNTY MOUNTAINS-
SANTA BARBARA COUNTY MOUNTAINS-VENTURA COUNTY MOUNTAINS-
LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-
ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY-
LOS ANGELES COUNTY SAN FERNANDO VALLEY-
LOS ANGELES COUNTY SAN GABRIEL VALLEY-
600 PM PST SAT MAR 5 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TONIGHT

THE FRONTAL SYSTEM WILL BRING MODERATE TO OCCASIONALLY HEAVY RAIN TO
MUCH OF THE REGION TONIGHT. LOCAL FLOODING OF ROADWAYS IS POSSIBLE.

GUSTY SOUTH TO SOUTHWEST WINDS AHEAD OF THE COLD FRONT MAY DOWN
TREES AND CAUSE ISOLATED POWER OUTAGES. THE STRONGEST WINDS WILL BE
ACROSS HIGHER TERRAIN INCLUDING THE ANTELOPE VALLEY. THE COMBINATION
OF GUSTY WINDS AND WET ROADWAYS WILL CREATE HAZARDOUS DRIVING
CONDITIONS THROUGH THE OVERNIGHT HOURS.

HIGH SURF WILL AFFECT WEST AND NORTHWEST FACING BEACHES TONIGHT
CREATING A HIGH RISK OF RIP CURRENTS AND SNEAKER WAVES ON ALL AREA
BEACHES. THE HIGH SURF MAY ALSO CREATE DANGEROUS BREAKING WAVES AT
MORRO BAY AND VENTURA HARBOR ENTRANCES TONIGHT.

* WIND ADVISORY..............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY

RAIN WILL END ACROSS LOS ANGELES COUNTY SUNDAY MORNING. GUSTY WINDS
WILL CONTINUE WITH THE STRONGEST WINDS ACROSS HIGHER TERRAIN
INCLUDING THE ANTELOPE VALLEY.

ANOTHER FRONTAL SYSTEM WILL BRING RAIN TO THE CENTRAL COAST LATE
SUNDAY NIGHT...AND TO THE REMAINDER OF THE REGION MONDAY
MORNING...FOLLOWED BY NUMEROUS SHOWERS MONDAY AFTERNOON AND EVENING.
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS MONDAY INTO MONDAY
EVENING. RAINFALL RATES COULD BE HIGH ENOUGH WITH THESE SYSTEMS TO
CAUSE MUD AND DEBRIS FLOWS IN AND BELOW THE RECENT BURN AREAS. SNOW
LEVELS WILL BE BETWEEN 4000 AND 5000 FEET MONDAY INTO MONDAY NIGHT.
SNOW COULD AFFECT TRAVEL ON INTERSTATE 5 NEAR THE GRAPEVINE MONDAY
AND MONDAY NIGHT. SNOWFALL ACCUMULATIONS OF 4 TO 8 INCHES ARE
EXPECTED ABOVE 6000 FEET. PRECIPITATION WILL END BY LATE MONDAY
EVENING...EXCEPT FOR THE NORTHERN SLOPES WHERE RAIN AND SNOW
SHOWERS MAY LINGER INTO EARLY TUESDAY.

STRONG WEST TO NORTHWEST WINDS WILL AFFECT MANY COASTAL AND VALLEY
AREAS SUNDAY THROUGH EARLY TUESDAY WITH POSSIBLY DAMAGING WINDS
ACROSS THE MOUNTAINS.

ACROSS COASTAL WATERS...THERE IS A CHANCE OF THUNDERSTORMS AND
ISOLATED WATERSPOUTS MONDAY INTO MONDAY EVENING WITH WIDESPREAD
GALE FORCE WINDS POSSIBLE SUNDAY THROUGH TUESDAY.

HIGH SURF IS EXPECTED ON WEST AND NORTHWEST FACING BEACHES SUNDAY
THROUGH TUESDAY. DURING THIS TIME...THERE WILL BE A HIGH RISK FOR
STRONG RIP CURRENTS. THE LARGEST SURF WILL LIKELY OCCUR MONDAY
THROUGH TUESDAY MORNING WHEN THE SURF ADVISORY MAY NEED TO BE
UPGRADED TO A HIGH SURF WARNING FOR THE POSSIBILITY OF DAMAGING SURF
AND SIGNIFICANT BEACH EROSION. THE VERY LARGE SURF COMBINED WITH
HIGH TIDES IN EXCESS OF 6 FEET WILL ALSO BRING THE THREAT OF
MODERATE COASTAL FLOODING OF BEACHES AND PARKING LOTS.
ADDITIONALLY...THE HIGH SURF WILL BRING THE POTENTIAL FOR
DANGEROUS BREAKING WAVES AT MORRO BAY AND VENTURA HARBOR
ENTRANCES SUNDAY THROUGH TUESDAY.

ANOTHER STORM MAY BRING ANOTHER ROUND OF RAIN AND MOUNTAIN
SNOW...GUSTY WINDS AND HIGH SURF TO THE REGION NEXT WEEKEND.

* WIND ADVISORY..............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *

* GALE WATCH...............SEE WHUS76 KLOX - MWWLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MUNROE/HALL

In the hours before

Special weather statement, Mar 6, 2:57 AM PST, 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
257 AM PST SUN MAR 6 2016

CAZ040-044-045-053-550-061130-
VENTURA COUNTY MOUNTAINS CA-SANTA CRUZ AND ANACAPA ISLANDS CA-
VENTURA COUNTY COAST CA-VENTURA COUNTY INTERIOR VALLEYS CA-
VENTURA COUNTY COASTAL VALLEYS CA-
257 AM PST SUN MAR 6 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN VENTURA COUNTY UNTIL 330
AM PST...

AT 254 AM PST...DOPPLER RADAR WAS TRACKING A LINE OF VERY HEAVY
SHOWERS AND POSSIBLE THUNDERSTORMS EXTENDING FROM LA CONCHITA TO
ABOUT 5 NM WEST OF PORT HUENEME. THIS LINE OF SHOWERS WAS MOVING
EAST...AND WILL AFFECT VENTURA...OXNARD...CAMARILLO...
SANTA PAULA...THOUSAND OAKS AND SIMI VALLEY BETWEEN 3 AM AND 4 AM
PST. VERY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE POSSIBLE AS
THIS LINE OF SHOWERS MOVES ACROSS THE COUNTY.

LAT...LON 3404 11933 3415 11922 3417 11922 3416 11923
      3419 11925 3426 11927 3427 11929 3427 11931
      3432 11938 3455 11938 3457 11878 3423 11885
      3405 11897 3409 11908 3411 11909 3409 11911
      3410 11912 3415 11921 3401 11936 3401 11938
TIME...MOT...LOC 1054Z 240DEG 49KT 3427 11912

DB
Special weather statement, Mar 6, 3:22 AM PST, 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
322 AM PST SUN MAR 6 2016

CAZ040-041-044>046-053-054-059-088-547-061215-
VENTURA COUNTY MOUNTAINS CA-ANTELOPE VALLEY CA-
SANTA CLARITA VALLEY CA-
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES CA-
LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE CA-
VENTURA COUNTY COAST CA-SANTA MONICA MOUNTAINS RECREATIONAL AREA CA-
LOS ANGELES COUNTY SAN FERNANDO VALLEY CA-
VENTURA COUNTY INTERIOR VALLEYS CA-VENTURA COUNTY COASTAL VALLEYS CA-
322 AM PST SUN MAR 6 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN LOS ANGELES COUNTY
AND EASTERN VENTURA COUNTY UNTIL 415 AM PST...

AT 317 AM PST...DOPPLER RADAR WAS TRACKING A STRONG SQUALL LINE
EXTENDING FROM OJAI TO CAMARILLO TO JUST EAST OF PORT HUENEME.
THIS LINE WAS MOVING EAST AND WILL BRING A BRIEF PERIOD
OF VERY HEAVY DOWNPOURS...WITH WIND GUSTS TO 50 MPH TO EASTERN
VENTURA COUNTY AND WESTERN LOS ANGELES COUNTY THROUGH 415 AM PST.

LOCATIONS IMPACTED INCLUDE...
THOUSAND OAKS...
SIMI VALLEY...
CAMARILLO...
FILLMORE...
MALIBU...
CHATSWORTH...
NORTH HOLLYWOOD...
WOODLAND HILLS...
AGOURA HILLS...
VAN NUYS...
SANTA MONICA...
NORTHRIDGE...
SANTA CLARITA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL WILL ALSO OCCUR WITH THIS STORM...AND MAY
LEAD TO FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3390 11832 3390 11842 3400 11848 3404 11854
      3403 11874 3400 11881 3403 11885 3405 11895
      3409 11908 3411 11909 3410 11912 3414 11919
      3476 11923 3480 11844
TIME...MOT...LOC 1119Z 240DEG 49KT 3464 11805

DB/ASR

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 5, 7:59 PM PSTCoastal Flood AdvisoryLOXLos Angeles62 hr
Mar 5, 7:59 PM PSTHigh Surf WarningLOXLos Angeles64 hr
Mar 5, 11:28 PM PSTAreal Flood AdvisoryLOXSanta Barbara, Ventura107 min
Mar 6, 12:42 AM PSTFlash Flood WarningLOXSan Luis Obispo2 hr
Mar 6, 1:06 AM PSTAreal Flood AdvisoryLOXSanta Barbara, Ventura114 min
Mar 6, 2:57 AM PSTSpecial Weather StatementLOXVentura33 min
Mar 6, 3:15 AM PSTAreal Flood AdvisoryLOXLos Angeles, Ventura2 hr
Mar 6, 3:22 AM PSTSpecial Weather StatementLOXVentura53 min
Mar 6, 3:55 AM PSTHigh Surf AdvisoryLOX2 hr
Mar 6, 4:04 AM PSTAreal Flood AdvisoryLOXLos Angeles3 hr
Mar 6, 6:06 AM PSTWind AdvisoryLOXLos Angeles14 hr
Mar 6, 6:19 AM PSTGale WarningLOX3 hr
Mar 6, 2:22 PM PSTGale WarningLOX61 hr
Mar 6, 2:42 PM PSTWinter Storm WarningLOX36 hr

Nearby

High Surf Advisories in California, 2016Every high surf advisory in 2016

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.