Alert archive / California / Flash Flood Warnings in 2015
Flash Flood Warning 21, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Jul 30, 2015, 2:29 PM PDT for Los Angeles County, California. It was in force for 2 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
- Jul 30, 2015, 2:29 PM PDT (21:29 UTC)
- Expired
- Jul 30, 2015, 4:30 PM PDT
- In force
- 2 hr
- Issued by
- NWS Los Angeles, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Los Angeles County, CA
The radar
The Los Angeles radar (KVTX), 78 km from the middle of the area, began a volume at 21:29 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, 9.5 hours before the alert went out and 200 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
- 1641 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
336
WGUS56 KLOX 302131
FFWLOX
CAC037-302330-
/O.NEW.KLOX.FF.W.0021.150730T2129Z-150730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OXNARD CA
229 PM PDT THU JUL 30 2015
THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL LOS ANGELES COUNTY IN SOUTHWESTERN CALIFORNIA...
* UNTIL 430 PM PDT
* AT 229 PM PDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
BEGIN SHORTLY. ANY THUNDERSTORM THAT FORMS WILL BE CAPABLE OF
PRODUCING DANGEROUS CLOUD TO GROUND LIGHTNING...SMALL HAIL AND
STRONG GUSTY WINDS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...ACTON...
SANTA CLARITA...HIGHWAY 14 AND THE POWERHOUSE BURN AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 3428 11822 3437 11851 3456 11864 3471 11852
3482 11830 3457 11794
$$
CS/RK/DG2 follow-up statements
798
WGUS76 KLOX 302229
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
319 PM PDT THU JUL 30 2015
CAC037-302330-
/O.CON.KLOX.FF.W.0021.000000T0000Z-150730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
319 PM PDT THU JUL 30 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM PDT FOR
NORTH CENTRAL LOS ANGELES COUNTY...
AT 319 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE THUNDERSTORMS
PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. LOCAL GAGES SHOW
RAINFALL TOTALS UP TO ONE AND ONE QUARTER INCHES OF RAIN...AND
DOPPLER RADAR ESIMATES UP TO TWO INCHES OF RAIN OVER HIGHWAY 14 WEST
OF ACTON. CALIFORNIA HIGHWAY PATROL HAS REPORTED HEAVY MUD AND
FLOODING ON HIGHWAY 14 BETWEEN ESCONDIDO AND RED ROVER MINE ROAD.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING IF THEY HAVE NOT
ALREADY INCLUDE...ACTON... SANTA CLARITA...HIGHWAY 14 AND THE
POWERHOUSE BURN AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 3428 11822 3437 11851 3456 11864 3471 11852
3482 11830 3457 11794
$$
SMITH/GOMBERG256
WGUS76 KLOX 302338
FFSLOX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
436 PM PDT THU JUL 30 2015
CAC037-302346-
/O.EXP.KLOX.FF.W.0021.000000T0000Z-150730T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOS ANGELES CA-
436 PM PDT THU JUL 30 2015
...THE FLASH FLOOD WARNING FOR NORTH CENTRAL LOS ANGELES COUNTY HAS
EXPIRED...
THE HEAVY RAIN HAS ENDED...BUT ADDITIONAL STORMS ARE STARTING TO
FORM IN THE WARNING AREA EAST OF ACTON. ANY THUNDERSTORMS THAT
DEVELOP IN THIS AREA WILL BE CAPABLE OF PRODUCING HEAVY
RAIN...LIGHTNING...STRONG GUSTY WINDS...HAIL...AND ROADWAY FLOODING.
LAT...LON 3428 11822 3437 11851 3456 11864 3471 11852
3482 11830 3457 11794
$$
SMITH/GOMBERGThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 5:43 PM PDT | Flash Flood Warning | LOX | Los Angeles | 107 min |
| Jul 29, 9:07 PM PDT | Flash Flood Watch | LOX | Los Angeles, Santa Barbara | 25 hr |
| Jul 30, 11:49 AM PDT | Flash Flood Warning | LOX | Santa Barbara, Ventura | 3 hr |
| Jul 30, 1:29 PM PDT | Areal Flood Advisory | LOX | Los Angeles | 3 hr |
| Jul 30, 1:48 PM PDT | Flash Flood Warning | LOX | Los Angeles, Ventura | 3 hr |
| Jul 30, 1:50 PM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Jul 30, 2:47 PM PDT | Flash Flood Warning | LOX | Santa Barbara | 3 hr |
| Jul 30, 2:47 PM PDT | Flash Flood Warning | LOX | Los Angeles, Ventura | 3 hr |
| Jul 30, 3:09 PM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Jul 30, 3:12 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles, Ventura | 48 min |
| Jul 30, 3:52 PM PDT | Severe Thunderstorm Warning | LOX | Ventura | 53 min |
| Jul 30, 3:55 PM PDT | Flash Flood Warning | LOX | Ventura | 3 hr |
Nearby
Flash Flood Warnings in California, 2015Every flash flood warning in 2015
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.