Alert archive / California / Flash Flood Warnings in 2011
Flash Flood Warning 21, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Sep 13, 2011, 4:40 PM PDT for San Luis Obispo County, Santa Barbara 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
- Sep 13, 2011, 4:40 PM PDT (23:40 UTC)
- Expired
- Sep 13, 2011, 7:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
Counties San Luis Obispo County, CA, Santa Barbara County, CA
The nearest sounding before it
Vandenberg AFB, CA (KVBG), launched 12:00Z, 11.7 hours before the alert went out and 78 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
- 1388 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
149
WGUS56 KLOX 132340
FFWLOX
CAC079-083-140230-
/O.NEW.KLOX.FF.W.0021.110913T2340Z-110914T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
440 PM PDT TUE SEP 13 2011
THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN SAN LUIS OBISPO COUNTY IN SOUTHWEST CALIFORNIA...
NORTH CENTRAL SANTA BARBARA COUNTY IN SOUTHWEST CALIFORNIA...
* UNTIL 730 PM PDT
* AT 430 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR
RAINFALL RATES WITH THIS STORM EXCEED 2 INCHES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CALIFORNIA VALLEY...CUYAMA VALLEY AND HIGHWAY 166.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.
&&
LAT...LON 3535 11980 3527 11980 3526 11967 3476 11959
3478 12004 3539 12011
$$
DANIELSON2 follow-up statements
730
WGUS76 KLOX 140106
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
606 PM PDT TUE SEP 13 2011
CAC079-083-140230-
/O.CON.KLOX.FF.W.0021.000000T0000Z-110914T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA BARBARA CA-SAN LUIS OBISPO CA-
606 PM PDT TUE SEP 13 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR
SOUTHEASTERN SAN LUIS OBISPO AND NORTH CENTRAL SANTA BARBARA
COUNTIES...
AT 550 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT
THUNDERSTORMS OVER THE REGION HAVE DIMINISHED GREATLY. HOWEVER...
SHOWERS AND THUNDERSTORMS CONTINUE OVER THE SANTA BARBARA COUNTY
PORTIONS OF THE WARNED AREA. DUE TO THE THREAT OF FLOODING FROM
THESE STORMS AND THOSE THAT OCCURRED EARLIER...THE FLASH FLOOD
WARNING REMAINS IN EFFECT OVER THE WARNED AREA UNTIL 730 PM.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CALIFORNIA
VALLEY AND CUYAMA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...
RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS
AND HIKERS SHOULD AVOID STREAMS OR CREEKS.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
OXNARD.
&&
LAT...LON 3535 11980 3527 11980 3526 11967 3476 11959
3478 12004 3539 12011
$$
DANIELSON037
WGUS76 KLOX 140225
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
725 PM PDT TUE SEP 13 2011
CAC079-083-140232-
/O.EXP.KLOX.FF.W.0021.000000T0000Z-110914T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA BARBARA CA-SAN LUIS OBISPO CA-
725 PM PDT TUE SEP 13 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM PDT FOR SOUTHEASTERN
SAN LUIS OBISPO AND NORTH CENTRAL SANTA BARBARA COUNTIES...
THUNDERSTORM ACTIVITY HAS DIMINISHED OVER THE SANTA BARBARA AND SAN
LUIS OBISPO COUNTY MOUNTAINS AND INTERIOR VALLEYS. THERE COULD BE A
FEW MORE STORM CELLS MOVE THROUGH THE EASTERN PORTION OF THESE
COUNTIES. BUT ANY THUNDERSTORMS THAT DO DEVELOP SHOULD BE MUCH
WEAKER IN INTENSITY.
LAT...LON 3535 11980 3527 11980 3526 11967 3476 11959
3478 12004 3539 12011
$$
KAPLANThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 1:18 PM PDT | Areal Flood Advisory | LOX | Los Angeles | 2 hr |
| Sep 13, 2:47 PM PDT | Special Weather Statement | LOX | Los Angeles | 58 min |
| Sep 13, 3:11 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 64 min |
| Sep 13, 3:34 PM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Sep 13, 4:08 PM PDT | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Sep 13, 4:50 PM PDT | Special Weather Statement | LOX | San Luis Obispo | 55 min |
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.