Alert archive / California / Flash Flood Warnings in 2008
Flash Flood Warning 21, NWS Los Angeles, CA
NWS Los Angeles, CA issued this flash flood warning at Jul 13, 2008, 2:03 PM PDT for Ventura County, California. It was in force for 117 min. 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
- Jul 13, 2008, 2:03 PM PDT (21:03 UTC)
- Expired
- Jul 13, 2008, 4:00 PM PDT
- In force
- 117 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), 37 km from the middle of the area, began a volume at 21:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 13, 2:38 PM PDT | FLASH FLOOD | Lockwood Valley, CA | MUD AND DEBRIS REPORTED ACROSS LOCKWOOD VALLEY ROAD AT MILE MARKER 13 WITH HEAVY RAINFALL IN VICINITY. |
| Jul 13, 2:38 PM PDT | HEAVY RAIN 2.21 | Lockwood Valley, CA | 2.21 INCHES OF RAIN MEASURED IN ONE HOUR AND 15 MINUTES AT LOCKWOOD VALLEY YARD. |
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, 9.1 hours before the alert went out and 124 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
- 1112 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS56 KLOX 132106 FFWLOX CAC111-132300- /O.NEW.KLOX.FF.W.0021.080713T2103Z-080713T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OXNARD CA 203 PM PDT SUN JUL 13 2008 THE NATIONAL WEATHER SERVICE IN OXNARD HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL VENTURA COUNTY IN SOUTHWEST CALIFORNIA... * UNTIL 400 PM PDT * AT 155 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A NEARLY STATIONARY THUNDERSTORM NEAR LOCKWOOD VALLEY...OR ABOUT 33 MILES NORTH OF VENTURA. 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. MOVE TO HIGHER GROUND. LAT...LON 3480 11923 3481 11903 3468 11898 3463 11923 $$ WOFFORD
2 follow-up statements
000 WGUS76 KLOX 132115 FFSLOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 208 PM PDT SUN JUL 13 2008 CAC111-132300- /O.CON.KLOX.FF.W.0021.000000T0000Z-080713T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ VENTURA CA- 208 PM PDT SUN JUL 13 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR NORTH CENTRAL VENTURA COUNTY... AT 200 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING IN LOCKWOOD VALLEY. RAIN GAGES AND WEATHER SPOTTERS IN THE AREA HAVE REPORTED OVER ONE INCH OF RAIN SINCE 130 PM. FLASH FLOODING IS LIKELY IN THIS AREA...WHICH INCLUDES LOCKWOOD VALLEY ROAD. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. LAT...LON 3480 11923 3481 11903 3468 11898 3463 11923 $$ WOFFORD
000 WGUS76 KLOX 132255 FFSLOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE OXNARD CA 351 PM PDT SUN JUL 13 2008 CAC111-132301- /O.EXP.KLOX.FF.W.0021.000000T0000Z-080713T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ VENTURA CA- 351 PM PDT SUN JUL 13 2008 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM PDT FOR NORTH CENTRAL VENTURA COUNTY... AT 350 PM...DOPPLER RADAR INDICATED THE HEAVY RAIN THAT PRODUCED FLASH FLOODING IN THE LOCKWOOD VALLEY HAD DECREASED IN INTENSITY. A RAIN GAGE IN LOCKWOOD VALLEY REPORTED 2.48 INCHES OF RAIN BETWEEN 130 PM AND 3 PM AND WEATHER SPOTTERS IN THE AREA REPORTED MUD AND DEBRIS ACROSS LOCKWOOD VALLEY ROAD AT THE 13 MILE MARKER. THUNDERSTORMS ARE STILL POSSIBLE ACROSS VENTURA COUNTY THIS AFTERNOON AND EVENING AND A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE MOUNTAINS AND VALLEYS UNTIL 11 PM. LAT...LON 3480 11923 3481 11903 3468 11898 3463 11923 $$ WOFFORD
The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:34 PM PDT | Flash Flood Warning | LOX | Los Angeles | 3 hr |
| Jul 12, 9:12 PM PDT | Flash Flood Warning | LOX | Los Angeles | 112 min |
| Jul 13, 1:00 AM PDT | Flash Flood Watch | LOX | Los Angeles, Santa Barbara | 21 hr |
Nearby
Flash Flood Warnings in California, 2008Every flash flood warning in 2008
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; radar from the NEXRAD Level II archive.