Alert archive / California / Flash Flood Warnings in 2004

Flash Flood Warning 40, NWS San Diego, CA

August 13, 2004San Bernardino County, California

NWS San Diego, CA issued this flash flood warning at Aug 13, 2004, 12:00 PM PDT for San Bernardino County, California. It was in force for 60 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
Aug 13, 2004, 12:00 PM PDT (19:00 UTC)
Expired
Aug 13, 2004, 1:00 PM PDT
In force
60 min
Issued by
NWS San Diego, CA
Area
Counties, with a storm outline in the text

County San Bernardino County, CA

The radar

The Santa Ana Mts radar (KSOX), 50 km from the middle of the area, began a volume at 19:03 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

Edwards AFB, CA (KEDW), launched 12:00Z, 7.0 hours before the alert went out and 95 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, Edwards AFB, CA at 12:00Z on 2004-08-13Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Edwards AFB, CA at 12:00Z on 2004-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
3442 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
30 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 131905
FFWSGX
CAC071-132000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
1200 PM PDT FRI AUG 13 2004

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS EXTENDED THE 

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN SAN BERNARDINO COUNTY IN SOUTHEAST CALIFORNIA.    
THIS INCLUDES THE LOCATIONS OF...CRESTLINE...ARROWHEAD 
SPRINGS...DEVORE...FOREST FALLS...BIG BEAR LAKE...RUNNING 
SPRINGS...OAK GLEN EN...HIGHLAND...ANGELUS OAKS ....HIGHWAY 
38...HIGHWAY 18...AND HIGHWAY 330.  

* UNTIL 100 PM PDT

* AT 1200 PM... HEAVY RAIN CONTINUES ACROSS THE SAN BERNARDINO 
COUNTY MOUNTAINS. CONDITIONS WILL REMAIN FAVORABLE FOR FLASH 
FLOODING THROUGH 1 PM. 

* RESIDENTS AND MOTORISTS IN AND BELOW RECENTLY BURNED AREAS SHOULD 
BE ALERT TO HEAVY MUD AND DEBRIS FLOWS WHICH MAY BLOCK ROADS AND 
CULVERTS. POTENTIALLY DANGEROUS FLOODING AND PROPERTY LOSS COULD 
RESULT IN AREAS WHERE RUNOFF IS RESTRICTED OR BLOCKED.



LAT...LON 3404 11764 3404 11671 3430 11681 3436 11760

$$

PURPURA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:32 AM PDTFlash Flood WarningSGXRiverside118 min
Aug 13, 9:38 AM PDTFlash Flood WarningSGXRiverside, San Bernardino2 hr
Aug 13, 10:44 AM PDTFlash Flood WarningSGXSan Diego2 hr
Aug 13, 12:18 PM PDTFlash Flood WarningSGXRiverside, San Diego2 hr
Aug 13, 12:53 PM PDTSevere Thunderstorm WarningSGXSan Diego57 min
Aug 13, 2:00 PM PDTFlash Flood WarningSGXSan Diego2 hr

Nearby

Flash Flood Warnings in California, 2004Every flash flood warning in 2004

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.