Alert archive / California / Flash Flood Warnings in 2016

Flash Flood Warning 13, NWS Los Angeles, CA

March 7, 2016Ventura County, California

NWS Los Angeles, CA issued this flash flood warning at Mar 7, 2016, 4:44 AM PST for Ventura County, California. It was in force for 91 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
Mar 7, 2016, 4:44 AM PST (12:44 UTC)
Expired
Mar 7, 2016, 6:15 AM PST
In force
91 min
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon
Flood severity
None

County Ventura County, CA

The radar

The Los Angeles radar (KVTX), 19 km from the middle of the area, began a volume at 12:44 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, 0.7 hours before the alert went out and 117 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, Vandenberg AFB, CA at 12:00Z on 2016-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Vandenberg AFB, CA at 12:00Z on 2016-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -187 square meters per square second.19395878Sfc1 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
17 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
477 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-187 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

545 
WGUS56 KLOX 071244
FFWLOX
CAC111-071415-
/O.NEW.KLOX.FF.W.0013.160307T1244Z-160307T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
444 AM PST MON MAR 7 2016

THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE SOLIMAR BURN AREA IN 
  WESTERN VENTURA COUNTY IN SOUTHWESTERN CALIFORNIA...

* UNTIL 615 AM PST

* AT 440 AM PST...DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY 
  HEAVY RAIN MOVING TOWARD THE BURN AREA. FLASH FLOODING AND DEBRIS
  FLOWS ARE LIKELY FROM THESE STORMS.

* SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE...
  HIGHWAY 101 AND SOLIMAR BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF DRIVING ON HIGHWAY 101 BE PREPARED FOR THE POTENTIAL OF FAST
MOVING WATER WITH MUD AND DEBRIS MOVING ACROSS THE HIGHWAY. DO NOT
ATTEMPT TO CROSS THIS RUSHING WATER MUD AND DEBRIS.

&&

LAT...LON 3428 11932 3429 11933 3431 11936 3433 11935
      3430 11931

$$

DB/ASR

MORE INFORMATION FROM THE USGS ON DEBRIS FLOWS AND THEIR IMPACTS
CAN BE FOUND AT HTTP://LANDSLIDES.USGS.GOV/RESEARCH/WILDFIRE
2 follow-up statements
873 
WGUS76 KLOX 071336
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
536 AM PST MON MAR 7 2016

CAC111-071415-
/O.CON.KLOX.FF.W.0013.000000T0000Z-160307T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VENTURA CA-
536 AM PST MON MAR 7 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM PST FOR
THE SOLIMAR BURN AREA IN WESTERN VENTURA COUNTY...

AT 534 AM PST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES CONTINUED
TO INDICATE VERY HEAVY RAIN WAS FALLING OVER THE AREA. FLASH
FLOODING AND DEBRIS FLOWS ARE EXPECTED. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
HIGHWAY 101 AND SOLIMAR BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF DRIVING ON HIGHWAY 101 BE PREPARED FOR THE POTENTIAL OF FAST
MOVING WATER WITH MUD AND DEBRIS MOVING ACROSS THE HIGHWAY. DO NOT
ATTEMPT TO CROSS THIS RUSHING WATER MUD AND DEBRIS.

&&

LAT...LON 3428 11932 3429 11933 3431 11936 3433 11935
      3430 11931

$$

DB/ASR
672 
WGUS76 KLOX 071415
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
615 AM PST MON MAR 7 2016

CAC111-071424-
/O.EXP.KLOX.FF.W.0013.000000T0000Z-160307T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VENTURA CA-
615 AM PST MON MAR 7 2016

...THE FLASH FLOOD WARNING FOR THE SOLIMAR BURN AREA IN WESTERN VENTURA COUNTY WILL
EXPIRE AT 615 AM PST...

THE HEAVIEST SHOWERS HAVE MOVED EAST OF THE BURN AREA...SO THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 3428 11932 3429 11933 3431 11936 3433 11935
      3430 11931

$$

DB

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 7, 12:33 AM PSTSpecial Marine WarningLOX57 min
Mar 7, 1:33 AM PSTHigh Wind WarningLOX24 hr
Mar 7, 1:33 AM PSTWind AdvisoryLOXLos Angeles, Santa Barbara31 hr
Mar 7, 2:37 AM PSTAreal Flood AdvisoryLOXSan Luis Obispo, Santa Barbara3 hr
Mar 7, 4:49 AM PSTAreal Flood AdvisoryLOXVentura3 hr
Mar 7, 5:25 AM PSTSevere Thunderstorm WarningLOXLos Angeles, Santa Barbara, Ventura65 min
Mar 7, 5:31 AM PSTSpecial Marine WarningLOX59 min
Mar 7, 6:13 AM PSTSpecial Weather StatementLOXLos Angeles62 min
Mar 7, 6:22 AM PSTSpecial Marine WarningLOX23 min
Mar 7, 6:46 AM PSTSevere Thunderstorm WarningLOXLos Angeles45 min
Mar 7, 6:50 AM PSTSpecial Marine WarningLOX25 min

Nearby

Flash Flood Warnings in California, 2016Every flash flood warning 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.