Alert archive / California / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 13, NWS Los Angeles, CA

October 19, 2010Los Angeles County, California

NWS Los Angeles, CA issued this severe thunderstorm warning at Oct 19, 2010, 7:56 PM PDT for Los Angeles County, California. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 19, 2010, 7:56 PM PDT (02:56 UTC)
Expired: Oct 19, 2010, 8:45 PM PDT
In force: 49 min
Issued by: NWS Los Angeles, CA
Area: Storm-based polygon

County Los Angeles County, CA

The radar

The Los Angeles radar (KVTX), 77 km from the middle of the area, began a volume at 02:56 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The text

As transmitted, in the capitals the NWS used until 2016.

625 
WUUS56 KLOX 200256
SVRLOX
CAC037-200345-
/O.NEW.KLOX.SV.W.0013.101020T0256Z-101020T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OXNARD CA
756 PM PDT TUE OCT 19 2010

THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL LOS ANGELES COUNTY IN SOUTHWEST CALIFORNIA...
  THIS INCLUDES THE CITY OF LANCASTER...

* UNTIL 845 PM PDT

* AT 750 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  PALMDALE...OR 9 MILES SOUTHEAST OF LANCASTER...AND MOVING WEST AT
  25 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3450 11862 3474 11860 3468 11799 3450 11801
TIME...MOT...LOC 0255Z 094DEG 23KT 3459 11811

$$

ASR/DD

2 follow-up statements

448 
WWUS56 KLOX 200322
SVSLOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
822 PM PDT TUE OCT 19 2010

CAC037-200345-
/O.CON.KLOX.SV.W.0013.000000T0000Z-101020T0345Z/
LOS ANGELES CA-
822 PM PDT TUE OCT 19 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM PDT
FOR NORTH CENTRAL LOS ANGELES COUNTY...

AT 812 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  SEVERAL SPOTTERS IN 
THE PATH OF THE STORM REPORTED HAIL OF HALF TO THREE QUARTERS OF AN 
INCH IN DIAMETER WITH INTENSE LIGHTING. THIS STORM WAS LOCATED 9 
MILES SOUTHWEST OF LANCASTER...AND WAS MOVING WEST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

LAT...LON 3450 11862 3474 11860 3468 11799 3450 11801
TIME...MOT...LOC 0318Z 094DEG 23KT 3460 11829

$$

DANIELSON

574 
WWUS56 KLOX 200348
SVSLOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
848 PM PDT TUE OCT 19 2010

CAC037-200354-
/O.EXP.KLOX.SV.W.0013.000000T0000Z-101020T0345Z/
LOS ANGELES CA-
848 PM PDT TUE OCT 19 2010

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LOS ANGELES
COUNTY WILL EXPIRE AT 845 PM PDT...

THE LINE OF THUNDERSTORMS THAT AFFECTED THE ANTELOPE VALLEY HAVE 
WEAKENED A BIT. THEREFORE...THE SEVERE THUNDERSTORM WARNING FOR THE 
ANTELOPE VALLEY WILL BE ALLOWED TO EXPIRE. HOWEVER...CLOUD TO GROUND 
LIGHTNING...SMALL HAIL...AND LOCAL GUSTY WINDS TO 40 MPH WILL 
CONTINUE. 

LAT...LON 3450 11862 3474 11860 3468 11799 3450 11801
TIME...MOT...LOC 0344Z 094DEG 23KT 3461 11849

$$

KAPLAN/RORKE

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Oct 19, 5:00 PM PDT, 2 hours 56 minutes earlier.

Area forecast discussion, Oct 19, 5:00 PM PDT, 2 hours 56 minutes before

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
500 PM PDT TUE OCT 19 2010

UPDATE FOR NEW AVIATION DISCUSSION

.SYNOPSIS...

AN UPPER LOW CENTER NEAR SAN DIEGO WILL MOVE INTO BAJA...THEN
NORTHEAST INTO ARIZONA BY MIDWEEK FOR A CHANCE OF SHOWERS AND A
SLIGHT CHANCE OF THUNDERSTORMS...WITH POSSIBLE WRAP AROUND MOISTURE
ON WEDNESDAY EVENING. A LOW PRESSURE AREA APPROACHES ON FRIDAY FOR A
SLIGHT CHANCE OF SHOWERS NORTH OF SANTA BARBARA. PARTLY CLOUDY SKIES
ARE EXPECTED WITH LITTLE TEMPERATURE CHANGE INTO SATURDAY...THEN
HIGH PRESSURE OFF THE COAST WILL NUDGE INTO THE REGION BY EARLY
NEXT WEEK...FOR A WARMING TREND.

&&

.SHORT TERM (TODAY-FRI)...CUTOFF LOW FUN CONTINUES THIS AFTERNOON.
LATEST RADAR CONTINUES TO SHOW SCATTERED SHOWERS AND THUNDERSTORMS
MOVING WEST ACROSS THE AREA...AS THE UPPER LOW SPINS ABOUT 250 MILES
SOUTH OF CATALINA ISLAND. SO FAR...SHOWERS/THUNDERSTORMS HAVE BEEN
MOVING PRETTY QUICKLY...ABOUT 30 MPH...SO THERE HAVE BEEN NO
SIGNIFICANT FLOODING ISSUES. HOWEVER...THE STORMS HAVE PRODUCED
MANY LIGHTNING STRIKES AS WELL AS SMALL HAIL AND SOME GUSTY WINDS.
EXPECT THIS ACTIVITY TO CONTINUE THROUGH THIS EVENING AS INSTABILITY
REMAINS DECENT OVER THE AREA. MAIN FOCUS OF THE PRECIP WILL BE
ACROSS SBA/VTU/LAX COUNTIES.

FORECAST WISE...MAIN CONCERN IN THE SHORT TERM WILL CONTINUE TO
BE THE TRACK OF THE UPPER LOW. 12Z MODELS MOVE THE UPPER LOW INLAND
ACROSS NORTHERN BAJA TONIGHT...THEN CONTINUE TO MOVE IT SLOWLY
EASTWARD WITH THE LOW EXITING THE AREA ON THURSDAY. THE NAM IS
SLOWER WITH THE MOVEMENT THAN THE GFS. WITH THIS PATTERN...WRAP
AROUND MOISTURE WILL CONTINUE ACROSS THE AREA THROUGH WEDNESDAY
NIGHT. HOWEVER...THE ACTIVITY WILL GRADUALLY END FROM THE NORTHWEST.
PER STABILITY PROGS...THERE IS ENOUGH INSTABILITY TO WARRANT SOME
THREAT OF THUNDERSTORMS THROUGH AT LEAST WEDNESDAY MORNING. NAM
QPF PROGS MUCH MORE ROBUST WITH WRAP AROUND PRECIP THAN THE GFS.
HOWEVER EACH SOLUTION INDICATES SOME THREAT OF PRECIP THROUGH
WEDNESDAY NIGHT ACROSS VTU/LAX COUNTIES.

FOR THE BALANCE OF THE DAY ON THURSDAY...CONDITIONS SHOULD BE
DRY...PARTLY CLOUDY AND COOL.

ON FRIDAY...ANOTHER SYSTEM MAY IMPACT NORTHERN SECTIONS OF THE
FORECAST AREA. 12Z GFS CONTINUES TO BACK OFF WITH THIS SYSTEM
INDICATING VERY LITTLE...IF ANY...PRECIP ACROSS SLO/SBA COUNTIES.
HOWEVER...THE 12Z NAM SPITS OUT QUITE A BIT OF PRECIP (UP TO
ONE HALF INCH) ACROSS SLO/SBA COUNTIES. AT THIS TIME...GIVEN THE
DIFFERENCE IN THESE SOLUTIONS...WILL KEEP MENTION OF SLIGHT CHANCE
POPS FOR THE CENTRAL COAST.

.LONG TERM (SAT-TUE)...FOR THE EXTENDED...MODELS HAVE SAME GENERAL
IDEA. AT UPPER LEVELS...RIDGE WILL BUILD OVER THE EASTERN PACIFIC.
WITH THIS PATTERN...THE AREA WILL BE UNDER A GENERAL NORTHWESTERLY
FLOW WILL SHOULD ALLOW FOR SOME MID/HIGH CLOUDS TO DRIFT OVER THE
AREA. NEAR THE SURFACE...VARYING DEGREES OF ONSHORE FLOW WILL
CONTINUE ACROSS THE AREA.

FORECAST WISE...THE ABOVE PATTERN SHOULD RESULT IN PARTLY CLOUDY
BUT DRY CONDITIONS ACROSS THE DISTRICT. TEMPS WILL BE WARMER BUT
STILL BELOW SEASONAL NORMS.

&&

.AVIATION...19/2355Z...LOW TO MODERATE CONFIDENCE IN THE CURRENT TAF
PACKAGE DUE TO UNCERTAINTIES IN TIMING AND EXTENT OF SHOWERS AND
THUNDERSTORMS AT THE INDIVIDUAL TAF SITES OVER VTU/L.A.
COUNTIES...AND OVERALL UNCERTAINTIES WITH REGARD TO LOW CLOUDS AND
LIFR/IFR/MVFR CONDITIONS AT MANY AIRFIELDS TONIGHT INTO WED.
HOWEVER...THERE WILL LIKELY BE PERIODS OF IFR/MVFR CONDITIONS THRU
THE PERIOD AT MOST TAF SITES.

KLAX AND KBUR...LOW TO MODERATE CONFIDENCE IN THE CURRENT TAFS DUE
TO UNCERTAINTIES WITH TIMING OF SHOWERS...AND LOW CLOUDS WITH MVFR
CONDITIONS. IT IS LIKELY THOUGH THAT MVFR CONDITIONS WILL AFFECT THE
AIRFIELDS AT TIMES THRU WED EVENING. THERE IS ALSO A SLIGHT CHANCE
OF THUNDERSTORMS TONIGHT INTO EARLY WED.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
MARINE WEATHER STATEMENT (SEE LAXMWSLOX).
SPECIAL WEATHER STATEMENT (SEE LAXSPSLOX).

&&

PUBLIC...THOMPSON
AVIATION...SIRARD
SYNOPSIS...SETO

WWW.WEATHER.GOV/LOSANGELES

Hazardous weather outlook, Oct 19, 6:00 AM PDT, 13 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PDT TUE OCT 19 2010

CAZ034>041-044>046-051>054-059-087-088-547-548-201300-
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 AM PDT TUE OCT 19 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

SCATTERED THUNDERSTORMS WILL CREATE DRIVING AND LIGHTNING HAZARDS
TODAY AND THIS EVENING ACROSS THE LAND AND THE SEA. THE

* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEDNESDAY ACROSS THE LAND
AND THE SEA SOUTH OF POINT CONCEPTION.

* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

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

RORKE

In the hours before

Special weather statement, Oct 19, 5:24 PM PDT, 2 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
524 PM PDT TUE OCT 19 2010

CAZ00-040-044>046-054-547-200100-
CA-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE
CA-LOS ANGELES COUNTY SAN FERNANDO VALLEY CA-SANTA MONICA MOUNTAINS
RECREATIONAL AREA CA-VENTURA COUNTY COAST CA-VENTURA COUNTY COASTAL
VALLEYS CA-VENTURA COUNTY INTERIOR VALLEYS CA-
524 PM PDT TUE OCT 19 2010

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN VENTURA AND WESTERN LOS
ANGELES COUNTIES UNTIL 600 PM PDT...

AT 515 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR SIMI VALLEY...OR 13 MILES NORTHEAST OF
THOUSAND OAKS...MOVING WEST AT 35 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER WAS CONFIRMED BY A LOCAL
SPOTTER. WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS
STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   WESTLAKE VILLAGE...
   MOORPARK AND  THOUSAND OAKS...
   CAMARILLO AND  SANTA PAULA...
   POINT MUGU...
   OXNARD AND  PORT HUENEME...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3407 11904 3409 11912 3415 11923 3401 11936
      3402 11944 3403 11944 3403 11935 3415 11923
      3424 11928 3426 11927 3431 11939 3435 11943
      3435 11942 3437 11864 3419 11860
TIME...MOT...LOC 0022Z 080DEG 31KT 3426 11874

DANIELSON/MEIER

Local storm report, Oct 19, 5:48 PM PDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OXNARD CA
548 PM PDT TUE OCT 19 2010

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

0525 PM     HAIL             3 NE SIMI VALLEY        34.29N 118.71W
10/19/2010  M1.00 INCH       VENTURA            CA   TRAINED SPOTTER

            TRAINED WEATHER SPOTTER MEASURED A HAILSTONE 1 INCH IN
            DIAMETER.

&&

MEIER

Special weather statement, Oct 19, 6:08 PM PDT, 1 hour 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
608 PM PDT TUE OCT 19 2010

CAZ041-045-046-054-059-088-547-200145-
ANTELOPE VALLEY CA-LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS
ANGELES CA-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA
RANGE CA-LOS ANGELES COUNTY SAN FERNANDO VALLEY CA-SANTA CLARITA
VALLEY CA-SANTA MONICA MOUNTAINS RECREATIONAL AREA CA-VENTURA COUNTY
COASTAL VALLEYS CA-
608 PM PDT TUE OCT 19 2010

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME EASTERN VENTURA AND
CENTRAL LOS ANGELES COUNTIES UNTIL 645 PM PDT...

AT 602 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES EAST OF ACTON...MOVING SOUTHWEST AT 30
MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   SUNLAND AND  TUJUNGA...
   LAKE VIEW TERRACE AND  BURBANK...
   SAN FERNANDO...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3408 11852 3430 11867 3455 11807 3440 11796
TIME...MOT...LOC 0106Z 059DEG 27KT 3443 11811

DANIELSON

Local storm report, Oct 19, 6:20 PM PDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE OXNARD CA
620 PM PDT TUE OCT 19 2010

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

0515 PM     HEAVY RAIN       3 W WOODLAND HILLS      34.17N 118.65W
10/19/2010  U0.00 INCH       LOS ANGELES        CA   TRAINED SPOTTER

            0.13 INCHES RAIN IN 5 MINUTES NEAR CHATSWORTH

0525 PM     HAIL             3 NE SIMI VALLEY        34.29N 118.71W
10/19/2010  M1.00 INCH       VENTURA            CA   TRAINED SPOTTER

            TRAINED WEATHER SPOTTER MEASURED A HAILSTONE 1 INCH IN
            DIAMETER.

0545 PM     HAIL             5 WNW SIMI VALLEY       34.29N 118.84W
10/19/2010  M0.50 INCH       VENTURA            CA   TRAINED SPOTTER

            MARBLE-SIZED HAIL REPORTED NEAR MOORPARK COLLEGE.

0605 PM     HAIL             OXNARD                  34.20N 119.21W
10/19/2010  M0.25 INCH       VENTURA            CA   OFFICIAL NWS OBS

            PEA-SIZED HAIL REPORTED AT NWS WFO-LOX

&&

MEIER

Special weather statement, Oct 19, 6:38 PM PDT, 1 hour 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
638 PM PDT TUE OCT 19 2010

CAZ054-059-200230-
ANTELOPE VALLEY CA-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA
MONICA RANGE CA-
638 PM PDT TUE OCT 19 2010

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LOS ANGELES COUNTY UNTIL
730 PM PDT...

AT 629 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WRIGHTWOOD...MOVING WEST AT 30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

MOTORISTS TRAVELING ALONG HIGHWAYS 2...N4...18 AND 138 SHOULD BE
PREPARED FOR STRONG CROSSWINDS...LOCAL PONDING ON ROADWAYS...AND
HAIL COVERED ROADWAYS.

* LOCATIONS IMPACTED INCLUDE...
   BIG PINES...
   FALLING SPRINGS...
   PEARBLOSSOM...
   LITTLEROCK...
   PALMDALE...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3425 11764 3433 11831 3465 11825 3460 11766
      3457 11766 3456 11765 3434 11763 3427 11763
TIME...MOT...LOC 0133Z 102DEG 27KT 3435 11760

DANIELSON

Special weather statement, Oct 19, 7:28 PM PDT, 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
728 PM PDT TUE OCT 19 2010

CAZ054-059-200300-
ANTELOPE VALLEY CA-LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA
MONICA RANGE CA-
728 PM PDT TUE OCT 19 2010

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LOS ANGELES COUNTY UNTIL
800 PM PDT...

AT 722 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES EAST OF LAKE LOS ANGELES...OR 27 MILES
EAST OF LANCASTER...MOVING WEST AT 30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   LAKE LOS ANGELES AND  SADDLEBACK BUTTE STATE PA...
   PEARBLOSSOM...
   LITTLEROCK...
   PALMDALE...
   LANCASTER...
   ACTON...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3423 11783 3425 11815 3434 11841 3444 11833
      3481 11888 3483 11767 3438 11764
TIME...MOT...LOC 0228Z 091DEG 28KT 3464 11776

 $$

ASR/DD

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 19, 5:31 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles, Ventura	29 min
Oct 19, 5:36 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	39 min
Oct 19, 5:59 PM PDT	Severe Thunderstorm Warning	LOX	Ventura	20 min
Oct 19, 6:08 PM PDT	Special Weather Statement	LOX	Los Angeles	37 min
Oct 19, 6:10 PM PDT	Special Marine Warning	LOX		35 min
Oct 19, 6:38 PM PDT	Special Weather Statement	LOX	Los Angeles	52 min
Oct 19, 7:28 PM PDT	Special Weather Statement	LOX	Los Angeles	32 min
Oct 19, 8:16 PM PDT	Severe Thunderstorm Warning	LOX	Los Angeles	29 min
Oct 19, 8:20 PM PDT	Areal Flood Advisory	LOX	Los Angeles	4 hr
Oct 19, 8:46 PM PDT	Special Weather Statement	LOX	Ventura	44 min
Oct 19, 9:28 PM PDT	Special Weather Statement	LOX	Ventura	62 min
Oct 19, 11:18 PM PDT	Special Weather Statement	LOX	Los Angeles	42 min
Oct 20, 12:24 AM PDT	Areal Flood Advisory	LOX	Los Angeles	3 hr

Nearby

Severe Thunderstorm Warnings in California, 2010 Every severe thunderstorm warning in 2010

Sources

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