Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Mar 20, 2011, 3:00 PM PDT for Ventura County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2011, 3:00 PM PDT (22:00 UTC)
- Expired
- Mar 20, 2011, 5:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Ventura County, CA
The radar
The Los Angeles radar (KVTX), 34 km from the middle of the area, began a volume at 22:02 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
Vandenberg AFB, CA (KVBG), launched 12:00Z, 10.0 hours before the alert went out and 153 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 500 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
965
WGUS56 KLOX 202200
FFWLOX
CAC111-210045-
/O.NEW.KLOX.FF.W.0002.110320T2200Z-110321T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
300 PM PDT SUN MAR 20 2011
THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL VENTURA COUNTY IN SOUTHWEST CALIFORNIA...
THIS INCLUDES THE CITIES OF CAMARILLO...OXNARD...SOMIS...AND POINT MUGU
* UNTIL 545 PM PDT
* AT 250 PM PDT...DOPPLER RADAR INDICATED A BAND OF VERY HEAVY RAIN
FROM POINT MUGU...NORTHWARD THROUGH CAMARILLO INTO SANTA PAULA. THIS
LINE OF INTENSE STORMS HAS BEEN NEARLY STATIONARY...PRODUCING RAINFALL
RATES AS HIGH AS 1.2 INCHES PER HOUR. THIS LINE OF STORMS IS EXPECTED
TO MOVE SLOWLY EASTWARD ACROSS THE COUNTY...LIKELY BRINGING DANGEROUS
FLOODING OF ROADWAYS...STREAMS...AND CREEKS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CAMARILLO...
OXNARD...POINT MUGU...SOMIS....AND SANTA PAULA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3417 11880 3409 11893 3404 11896 3405 11896
3406 11901 3409 11909 3409 11912 3411 11916
3414 11920 3443 11917 3439 11884 3417 11875
$$
GOMBERG2 follow-up statements
198
WGUS76 KLOX 202333
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
433 PM PDT SUN MAR 20 2011
CAC111-210045-
/O.CON.KLOX.FF.W.0002.000000T0000Z-110321T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VENTURA CA-
433 PM PDT SUN MAR 20 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM PDT FOR SOUTH
CENTRAL VENTURA COUNTY...
AT 422 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A BAND OF VERY HEAVY RAIN EXTENDING FROM POINT MUGU NORTHWARD
THROUGH CAMARILLO. RAIN GAUGES INDICATED THAT RAINFALL RATES WERE STILL
UP NEAR 1 INCH PER HOUR ACROSS THE AREA...AND MORE THAN 2 INCHES OF RAIN
HAS FALLEN IN SOME AREAS IN TWO HOURS. THIS LINE OF SHOWERS WILL LINGER
ACROSS THE WARNING AREAS THROUGH 545 PM...LIKELY BRINGING DANGEROUS
FLOODING OF ROADWAYS...STREAMS...AND CREEKS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. MOVE
TO HIGHER GROUND. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND
IMMEDIATELY. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS
THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.
LAT...LON 3417 11880 3409 11893 3404 11896 3405 11896
3406 11901 3409 11909 3409 11912 3411 11916
3414 11920 3443 11917 3439 11884 3417 11875
$$
BRUNO731
WGUS76 KLOX 210040
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
540 PM PDT SUN MAR 20 2011
CAC111-210048-
/O.EXP.KLOX.FF.W.0002.000000T0000Z-110321T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VENTURA CA-
540 PM PDT SUN MAR 20 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM PDT FOR SOUTH
CENTRAL VENTURA COUNTY...
THE LATEST RAIN GAGE DATA ACROSS VENTURA COUNTY INDICATED THAT
RAINFALL RATES HAD DECREASED ACROSS THE WARNING AREA. THEREFORE THE
FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 545 PM PDT.
ALTHOUGH THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE...A FLOOD
ADVISORY REMAINS IN EFFECT FOR ALL OF VENTURA COUNTY UNTIL 730 PM
PDT.
LAT...LON 3417 11880 3409 11893 3404 11896 3405 11896
3406 11901 3409 11909 3409 11912 3411 11916
3414 11920 3443 11917 3439 11884 3417 11875
$$
RATThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 19, 10:15 PM PDT | Areal Flood Advisory | LOX | San Luis Obispo | 6 hr |
| Mar 19, 10:26 PM PDT | Areal Flood Advisory | LOX | Santa Barbara | 23 hr |
| Mar 20, 2:26 AM PDT | Special Marine Warning | LOX | 49 min | |
| Mar 20, 4:03 AM PDT | Areal Flood Advisory | LOX | San Luis Obispo | 6 hr |
| Mar 20, 7:34 AM PDT | Areal Flood Advisory | LOX | Ventura | 12 hr |
| Mar 20, 8:39 AM PDT | Small Craft Advisory for Hazardous Seas | LOX | 18 hr | |
| Mar 20, 10:03 AM PDT | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 117 min |
| Mar 20, 10:03 AM PDT | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Mar 20, 11:03 AM PDT | Areal Flood Advisory | LOX | Los Angeles | 14 hr |
| Mar 20, 11:46 AM PDT | River Flood Warning | LOX | Santa Barbara | 46 hr |
| Mar 20, 12:01 PM PDT | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 3 hr |
| Mar 20, 2:59 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 61 min |
| Mar 20, 3:02 PM PDT | River Flood Warning | LOX | Ventura | 6 hr |
| Mar 20, 3:07 PM PDT | Areal Flood Advisory | LOX | San Luis Obispo, Santa Barbara | 3 hr |
| Mar 20, 3:25 PM PDT | River Flood Warning | LOX | Ventura | 18 hr |
Nearby
Flash Flood Warnings in California, 2011Every flash flood warning in 2011
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.