Alert archive / South Carolina / Flash Flood Warnings in 1992

Flash Flood Warning 1, NWS Charleston, SC

June 12, 1992Dorchester County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jun 12, 1992, 9:51 AM EDT for Dorchester County, South Carolina. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 12, 1992, 9:51 AM EDT (13:51 UTC)
Expired
Jun 12, 1992, 2:00 PM EDT
In force
4 hr
Issued by
NWS Charleston, SC
Area
Whole counties

County Dorchester County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 1.9 hours before the alert went out and 43 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, Charleston AFB, SC at 12:00Z on 1992-06-12Temperature 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, Charleston AFB, SC at 12:00Z on 1992-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.193958Sfc1 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
525 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCHS 121351
FFWCHS
SCC035-121800-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
951 AM EDT FRI JUN 12 1992
 
IN  SOUTH CAROLINA
 
   ...DORCHESTER COUNTY
 
FLOOD WARNING
NATIONAL WEATHER SERVICE OFFICE CHARLESTON SC
0945 AM EDT FRI JUN 12 1992
 
RUNOFF FROM THE PROLONGED HEAVY RAIN FALL IN THE SUMMERVILLE...
KNITSVILLE AND LADSON AREAS WILL CAUSE SMALL STREAMS TO OVERFLOW THEIR
BANKS IN THE LOWER PART OF DORCHESTER COUNTY AROUND THE OAKBROOK AREA
AND ON HIWAY 78.
 
OVERNIGHT RAINFALL AMOUNTS FROM 2.12 INCHES AT SUMMERVILLE TO OVCER 4
INCHES /4.05/ AT THE CRESTWOOD SUBDIVISION ON BACON BRIDGE ROAD.
HEAVY SHOWERS CONTINUE TO DEVELOP IN THIS AREA AND THEN MOVE SLOWLY
EASTWARD.
 
THERE HAVE BEEN REPORTS OF SOME FLOODING IN SUBDIVISONS...MAINLY THOSE
IN LOW LYING AREAS.
 
IF YOU LIVE OR WORK ALONG STREAMS IN THE SOUTH PART OF DORCHESTER
COUNTY...TAKE NECESSARY PRECAUTIONS NOW.
 
STAY TUNED TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO.  ADDITIONAL
STATEMENTS WILL BE ISSUED HOURLY.
 
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.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
SIMPSON

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, Jun 12, 9:49 AM EDT, 2 minutes before
SCZALL-121430-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE CHARLESTON SC
930 AM EDT FRI JUN 12 1992

...THUNDERSTORMS WITH VERY HEAVY RAINFALL IN THE SUMMERVILLE AREA...

VERY HEAVY RAINFALL CONTINUED FROM SUMMERVILLE TO HUGER SOUTH CAROLINA.

PERSONS IN THIS VICINITY SHOULD KEEP ALERT FOR OVERFLOWING SMALL
STREAMS AND DRAINAGE DITCHES. MOTORISTS TAKE EXTRA CARE AND ALLOW FOR
EXTRA TIME TRAVELING...FOR ROADWAYS AND DITCHES MAY FLOOD IN LOW LYING
AREAS.  DURING THE PAST 24 HOURS...RAINFALL TOTALS IN THE SUMMERVILLE
AREA RANGED FROM 2 TO 5 INCHES.

ELSEWHERE...MOSTLY LIGHT RAIN WAS OVER MUCH OF SOUTH CAROLINA AND
EXTENDED INTO EASTERN GEORGIA.

MOVEMENT WAS TO THE( EAST AT 25 MILES AN HOUR.
RAO

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 2:53 PM EDTFlash Flood WarningCHSBerkeley, Dorchester9 hr

Nearby

Flash Flood Warnings in South Carolina, 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.