Alert archive / California / Flash Flood Warnings in 1992

Flash Flood Warning 5, NWS San Diego, CA

August 13, 1992Imperial County, California

NWS San Diego, CA issued this flash flood warning at Aug 13, 1992, 3:35 PM PDT for Imperial County, California. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Aug 13, 1992, 3:35 PM PDT (22:35 UTC)
Expired
Aug 13, 1992, 4:30 PM PDT
In force
55 min
Issued by
NWS San Diego, CA
Area
Whole counties

County Imperial County, CA

The nearest sounding before it

Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 10.6 hours before the alert went out and 84 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, Yuma Intl Airpor, AZ at 12:00Z on 1992-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Yuma Intl Airpor, AZ at 12:00Z on 1992-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
280 J/kg
Mixed-layer CIN
-289 J/kg
Mixed-layer LCL
2459 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 13, 12:30 PM PDT, 3 hours 5 minutes before
CAC073-140130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
1230 PM PDT THU AUG 13 1992

...THUNDERSTORMS AND HEAVY RAIN IN AND NEAR THE MOUNTAINS...

AT 12 NOON RADAR...SATELLITE AND REMOTE RAIN GAUGES INDICATED LOCAL
HEAVY RAIN NEAR CUYAMACA AND DULZURA.  THE HEAVY RAIN WAS ASSOCIATED
WITH THUNDERSTORMS.  THUNDERSTORMS WILL CONTINUE IN THE MOUNTAINS OF
SAN DIEGO COUNTY THIS AFTERNOON AND EVENING.  SOME THUNDERSTORMS WILL
DRIFT WEST OF THE MOUNTAINS AND WILL MAINLY AFFECT THE INLAND VALLEYS
...BUT SOME COULD EVEN REACH THE COAST.  AT NOON THERE WAS A
THUNDERSTORM JUST EAST OF GILLESPIE FIELD.  THERE WILL ALSO BE SOME
THUNDERSTORMS IN THE DESERTS.

SOME THUNDERSTORMS MAY HAVE HEAVY RAIN...STRONG GUSTY
WINDS...DANGEROUS LIGHTNING AND SMALL HAIL.  IF THREATENING WEATHER
APPROACHES SEEK SHELTER INDOORS.  AVOID SHELTER UNDER ISOLATED TREES
OR OTHER TALL OBJECTS OR IN LOW LYING AREAS SUBJECT TO FLOODING.

MOIST UNSTABLE AIR IS FLOWING AROUND HIGH PRESSURE CENTERED OVER
NEVADA.  THIS WILL CONTINUE SCATTERED THUNDERSTORMS IN THE MOUNTAINS
AND DESERTS WITH SOME DRIFTING WEST OF THE MOUNTAINS.  THUNDERSTORMS
WILL CONTINUE INTO THIS EVENING AND THEN TAPER LATE TONIGHT.

ATKIN
Local storm report, Aug 13, 2:07 PM PDT, 1 hour 28 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO
205 PM PDT THU AUG 13 1992

...SEVERE THUNDERSTORM AND FLASH FLOODING IN SAN DIEGO COUNTY...

PALOMAR MOUNTAIN OBSERVATORY REPORTED THREE QUARTER INCH HAIL AT
2PM PDT THURSDAY ACCOMPANIED BY HEAVY RAIN AND LIGHTNING.

HEAVY FLOODING OVER THE HIGHWAY NEAR HIGHWAY 8 AND HIGHWAY 78 JUNCTION.
FOREST SERVICE REPORTS HEAVY WATER RUNNING OVER THE HIGHWAYS AT
1:50 PM PDT.

NUMEROUS POWER OUTAGES THROUGHOUT SAN DIEGO.  SAN DIEGO NWR OUT OF
SERVICE 1:45 PM AND STILL OUT DUE TO LIGHTNING STRIKE.

SHIGEHARA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 12:36 PM PDTFlash Flood WarningSGXSan Diego69 min
Aug 13, 1:33 PM PDTFlash Flood WarningSGXSan Diego57 min
Aug 13, 1:33 PM PDTSevere Thunderstorm WarningSGXSan Diego57 min
Aug 13, 3:35 PM PDTSevere Thunderstorm WarningSGXImperial55 min

Nearby

Flash Flood Warnings in California, 1992Every flash flood warning in 1992

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.