Alert archive / California / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Los Angeles, CA

January 31, 2016Santa Barbara County, Ventura County, California

NWS Los Angeles, CA issued this flash flood warning at Jan 31, 2016, 10:57 AM PST for Santa Barbara County, Ventura County, California. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jan 31, 2016, 10:57 AM PST (18:57 UTC)
Expired
Jan 31, 2016, 1:45 PM PST
In force
3 hr
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon
Flood severity
None

Counties Santa Barbara County, CA, Ventura County, CA

What was reported inside it

TimeReportWhereRemark
Jan 31, 11:09 AM PSTHEAVY RAIN 1.467 E Refugio State Beach, CA1.46 INCHES OF RAIN IN ONE HOUR AT DOS PUEBLOS.
Jan 31, 11:12 AM PSTFLASH FLOOD4 Nw Santa Barbara, CAFLASH FLOODING WITH MUD AND ROCKS ACROSS HIGHWAY 154 NEAR SANTA ANTONIO CREEK RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Vandenberg AFB, CA (KVBG), launched 12:00Z, 7.0 hours before the alert went out and 45 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 2016-01-31Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Vandenberg AFB, CA at 12:00Z on 2016-01-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 272 square meters per square second.1939587897117136156Sfc1 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
1036 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
272 m²/s²
0-3 km storm-relative helicity
399 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

789 
WGUS56 KLOX 311857
FFWLOX
CAC083-111-312145-
/O.NEW.KLOX.FF.W.0009.160131T1857Z-160131T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
1057 AM PST SUN JAN 31 2016

THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN VENTURA COUNTY IN SOUTHWESTERN CALIFORNIA...
  NORTHWESTERN SANTA BARBARA COUNTY IN SOUTHWESTERN CALIFORNIA...

* UNTIL 145 PM PST

* AT 1052 AM PST...DOPPLER RADAR AND AUTOMATED GAGES INDICATED
  MODERATE TO HEAVY RAIN FALLING ACROSS THE WARNED AREA. RAIN RATES
  OF THREE QUARTERS TO ONE INCH PER HOUR WERE OBSERVED AT NORDHOFF
  RIDGE AND SAN MARCOS PASS. RAIN RATES OVER ONE HALF INCH PER HOUR
  WERE OBSERVED IN SUMMERLAND. FLASH FLOODING IS IMMINENT OR
  OCCURRING IN THESE AREAS. MODERATE TO HEAVY RAIN IS EXPECTED TO
  CONTINUE THROUGH 145 PM THIS AFTERNOON. 

* SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... SANTA
  BARBARA...LOMPOC...MONTECITO...SANTA YNEZ...SOLVANG...VANDENBERG
  VILLAGE... EL CAPITAN AND REFUGIO STATE BEACHES...ISLA
  VISTA...SUMMERLAND...GOLETA... BUELLTON...FIGUEROA
  MOUNTAIN...HIGHWAY 101 THROUGH GAVIOTA STATE PARK...AND HIGHWAY
  154 OVER SAN MARCOS PASS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3486 12024 3466 11924 3444 11934 3442 11990
      3446 12001 3447 12013 3447 12030 3444 12046
      3469 12060

$$

SMITH/HALL
1 follow-up statement
083 
WGUS76 KLOX 312142
FFSLOX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
142 PM PST SUN JAN 31 2016

CAC083-111-312151-
/O.EXP.KLOX.FF.W.0009.000000T0000Z-160131T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VENTURA CA-SANTA BARBARA CA-
142 PM PST SUN JAN 31 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN VENTURA AND NORTHWESTERN
SANTA BARBARA COUNTIES WILL EXPIRE AT 145 PM PST...

RAIN HAS ENDED IN THE WARNED AREAS. FLOOD WATERS HAVE RECEDED...AND
ARE NO LONGER EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE
CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 3486 12024 3466 11924 3444 11934 3442 11990
      3446 12001 3447 12013 3447 12030 3444 12046
      3469 12060

$$

SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 30, 8:12 PM PSTWind AdvisoryLOXLos Angeles49 hr
Jan 31, 2:22 AM PSTHigh Wind WarningLOXLos Angeles, Santa Barbara34 hr
Jan 31, 3:30 AM PSTSmall Craft AdvisoryLOX11 hr
Jan 31, 3:47 AM PSTHigh Surf AdvisoryLOXLos Angeles53 hr
Jan 31, 6:46 AM PSTAreal Flood AdvisoryLOXSanta Barbara3 hr
Jan 31, 7:59 AM PSTAreal Flood AdvisoryLOXVentura3 hr
Jan 31, 9:05 AM PSTSpecial Marine WarningLOX55 min
Jan 31, 9:10 AM PSTAreal Flood AdvisoryLOXSan Luis Obispo3 hr
Jan 31, 9:16 AM PSTFlash Flood WarningLOXSan Luis Obispo3 hr
Jan 31, 9:16 AM PSTSpecial Weather StatementLOXSanta Barbara44 min
Jan 31, 9:18 AM PSTFlash Flood WarningLOXSan Luis Obispo3 hr
Jan 31, 9:44 AM PSTAreal Flood AdvisoryLOXSanta Barbara3 hr
Jan 31, 10:17 AM PSTSpecial Marine WarningLOX58 min
Jan 31, 10:52 AM PSTSpecial Weather StatementLOXSanta Barbara23 min
Jan 31, 11:14 AM PSTAreal Flood AdvisoryLOXVentura3 hr
Jan 31, 11:20 AM PSTSevere Thunderstorm WarningLOXSanta Barbara55 min
Jan 31, 11:34 AM PSTFlash Flood WarningLOXSanta Barbara, Ventura3 hr
Jan 31, 12:09 PM PSTSpecial Weather StatementLOXVentura51 min
Jan 31, 12:15 PM PSTSpecial Weather StatementLOXVentura45 min
Jan 31, 12:24 PM PSTAreal Flood AdvisoryLOXLos Angeles3 hr
Jan 31, 12:34 PM PSTSevere Thunderstorm WarningLOXLos Angeles, Ventura56 min
Jan 31, 12:54 PM PSTFlash Flood WarningLOXLos Angeles3 hr
Jan 31, 1:08 PM PSTSevere Thunderstorm WarningLOXLos Angeles37 min
Jan 31, 1:35 PM PSTSpecial Marine WarningLOX25 min
Jan 31, 1:50 PM PSTSevere Thunderstorm WarningLOXLos Angeles25 min
Jan 31, 3:09 PM PSTWind AdvisoryLOX30 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.