Alert archive / South Carolina / Flash Flood Warnings in 2002

Flash Flood Warning 2, NWS Charleston, SC

August 29, 2002Colleton County, South Carolina

NWS Charleston, SC issued this flash flood warning at Aug 29, 2002, 11:41 AM EDT for Colleton County, South Carolina. It was in force for 79 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 29, 2002, 11:41 AM EDT (15:41 UTC)
Expired
Aug 29, 2002, 1:00 PM EDT
In force
79 min
Issued by
NWS Charleston, SC
Area
Whole counties

County Colleton County, SC

The radar

The Charleston,SC radar (KCLX), 42 km from the middle of the area, began a volume at 15:41 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

Charleston AFB, SC (KCHS), launched 12:00Z, 3.7 hours before the alert went out and 61 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 2002-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2002-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 square meters per square second.1939Sfc1 km3 km6 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
38 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
181 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 
WGUS52 KCHS 291541
FFWCHS
SCC029-291700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
1141 AM EDT THU AUG 29 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COLLETON COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 100 PM EDT.

* AT 1141 AM EDT...RADAR INDICATED AN AREA OF PERSISTENT HEAVY RAIN 
  FROM CANADYS THROUGH WALTERBORO TO HENDERSONVILLE. THE AREA OF
  HEAVY RAIN IS NEARLY STATIONARY. RADAR ESTIMATES AS MUCH AS 3 TO
  5 INCHES OF RAIN HAS FALLEN OVER THIS AREA SINCE MID MORNING. 
  ADDITIONAL HEAVY RAINFALL WILL CAUSE FLASH FLOODING.

* FLOODING WILL OCCUR IN AND AROUND...
  CANADYS...
  WALTERBORO...
  INTERSTATE 95 BETWEEN MILE MARKERS 68 AND 53 
  RHODES CROSSROADS...
  SIDNEY...
  HENDERSONVILLE...

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
FOR HIGHER GROUND. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES.

$$

LAT...LON 3285 8082 3279 8063 3304 8051 3310 8068

ST
1 follow-up statement
000 
WGUS72 KCHS 291628
FFSCHS
SCC029-291700-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1227 PM EDT THU AUG 29 2002

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR COLLETON COUNTY
UNTIL 1 PM EDT...

AT 1225 PM...RADAR INDICATED VERY HEAVY RAIN PERSISTING ACROSS 
NORTHERN COLLETON COUNTY FROM CANADYS TO SIDNEY SOUTH TO WALTERBORO
AND HENDERSONVILLE. RADAR ESTIMATES AS MUCH AS 2 TO 4 INCHES OF
RAIN HAS FALLEN ACROSS IN THESE AREAS WITH AS MUCH AS 5 TO 6 INCHES
BETWEEN CANADYS AND SIDNEY. THE FLASH FLOOD WARNING WILL LIKELY BE 
EXTENDED BEYOND 1 PM.

DANGEROUS FLOODING IS LIKELY IN PROGRESS. DO NOT DRIVE INTO AREAS 
WHERE WATER COVERS THE ROAD MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

REPORT FLOODING TO LOCAL LAW ENFORCEMENT AND ASK THEM TO RELAY THIS
INFORMATION TO THE NATIONAL WEATHER SERVICE IN CHARLESTON.

$$


ST

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 12:14 PM EDTFlash Flood WarningCHSDorchester91 min
Aug 29, 12:47 PM EDTFlash Flood WarningCHSColleton3 hr
Aug 29, 1:36 PM EDTFlash Flood WarningCHSDorchester2 hr

Nearby

Flash Flood Warnings in South Carolina, 2002Every flash flood warning in 2002

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.