Alert archive / California / Flash Flood Warnings in 2006

Flash Flood Warning 13, NWS San Diego, CA

July 4, 2006San Diego County, California

NWS San Diego, CA issued this flash flood warning at Jul 4, 2006, 3:18 PM PDT for San Diego County, California. It was in force for 57 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
Jul 4, 2006, 3:18 PM PDT (22:18 UTC)
Expired
Jul 4, 2006, 4:15 PM PDT
In force
57 min
Issued by
NWS San Diego, CA
Area
Counties, with a storm outline in the text

County San Diego County, CA

The radar

The San Diego radar (KNKX), 68 km from the middle of the area, began a volume at 22:20 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

San Diego, CA (KNKX), launched 12:00Z, 10.3 hours before the alert went out and 87 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, San Diego, CA at 12:00Z on 2006-07-04Temperature 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, San Diego, CA at 12:00Z on 2006-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
1681 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS56 KSGX 042218
FFWSGX
CAC073-042315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
318 PM PDT TUE JUL 4 2006

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN SAN DIEGO COUNTY IN SOUTHWEST CALIFORNIA

* UNTIL 415 PM PDT

* AT 311 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BORREGO
  SPRINGS

THUNDERSTORMS WITH HEAVY RAINS WERE OCCURRING OVER THE MOUNTAINS 
JUST WEST OF BORREGO SPRINGS SINCE 230 PM. NATIONAL WEATHER SERVICE 
DOPPLER RADAR INDICATES THAT ONE AND ONE-HALF INCHES OF RAIN HAVE 
FALLEN ABOUT 5 MILES WEST OF BORREGO SPRINGS OR NEAR MOUNT SAN 
YSIDRO. THIS WILL RESULT IN RAPID RISES OF WATER IN BORREGO PALM 
CANYON AND OTHER NEARBY CANYONS. PEOPLE IN BORREGO PALM CANYON 
SHOULD CLIMB TO SAFETY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3311 11648 3302 11629 3342 11624 3342 11656

$$

MAXWELL
1 follow-up statement
000 
WGUS76 KSGX 042232
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
330 PM PDT TUE JUL 4 2006

CAC073-042315-
SAN DIEGO CA-
330 PM PDT TUE JUL 4 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM PDT FOR
NORTHEASTERN SAN DIEGO COUNTY...

AT 325 PM...THUNDERSTORMS CONTINUED SOUTH AND SOUTHWEST OF BORREGO 
SPRINGS. THE HEAVIEST RAINS WERE GENERALLY 5 TO 10 MILES SOUTH AND 
SOUTHWEST OF BORREGO SPRINGS. THIS INCLUDES AREAS ALONG HIGHWAY 78 
EAST OF SCISSORS JUNCTION. HIGHWAY 78 WILL BE PRONE TO FLASH 
FLOODING THROUGH 415 PM...ESPECIALLY NEAR THE INTERSECTION OF 
HIGHWAY S 3 WHICH GOES TO BORREGO SPRINGS. ALSO...BECAUSE OF THE 
HEAVY RAINS THAT OCCURRED SINCE 230 PM...CANYONS JUST WEST OF 
BORREGO SPRINGS WILL BE PRONE TO FLOODING.

IF WATERS RISE IN A CANYON...CLIMB TO SAFETY. DO NOT DRIVE INTO 
FLOOD WATERS.

LAT...LON 3311 11648 3302 11629 3342 11624 3342 11656

$$

MAXWELL

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 4, 4:11 PM PDTFlash Flood WarningSGXSan Diego64 min
Jul 4, 4:25 PM PDTFlash Flood WarningSGXSan Bernardino65 min

Nearby

Flash Flood Warnings in California, 2006Every flash flood warning in 2006

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.