Alert archive / South Carolina / Flash Flood Warnings in 2002

Flash Flood Warning 15, NWS Charleston, SC

October 11, 2002Berkeley County, Charleston County, South Carolina

NWS Charleston, SC issued this flash flood warning at Oct 11, 2002, 11:00 AM EDT for Berkeley County, Charleston County, South Carolina. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 11, 2002, 11:00 AM EDT (15:00 UTC)
Expired: Oct 11, 2002, 1:00 PM EDT
In force: 2 hr
Issued by: NWS Charleston, SC
Area: Counties, with a storm outline in the text

Counties Berkeley County, SC, Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 101 km from the middle of the area, began a volume at 15:09 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, 3.0 hours before the alert went out and 5 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2652 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 12.9

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KCHS 111500
FFWCHS
SCC015-019-111700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
1056 AM EDT FRI OCT 11 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL BERKELEY COUNTY IN SOUTHEAST SOUTH CAROLINA.
  CENTRAL CHARLESTON COUNTY IN SOUTHEAST SOUTH CAROLINA.

* UNTIL 100 PM EDT.

* AT 1056 AM EDT...RADAR INDICATED VERY HEAVY RAIN OCCURRING OVER    
  CHARLESTON AIRPORT.  RAINFALL TOTALS OF 3 TO 4 INCHES HAVE         
  OCCURRED THE PAST FEW HOURS. THE THUNDERSTORMS PRODUCING THE       
  FLOODING ARE MOVING NORTHEAST AT 20 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... CHARLESTON...CHARLESTON
  AIRPORT...DANIEL ISLAND...GOOSE CREEK...HANAHAN...JAMES ISLAND...
  MOUNT PLEASANT...NORTH CHARLESTON...SHADOWMOSS...SULLIVANS ISLAND
  AND WEST ASHLEY.

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE RAPID FLOODING OF
ROADWAYS...SMALL CREEKS AND STREAMS...LOW-LYING AREAS AND DITCHES.

LAT...LON 3287 8014 3267 7994 3282 7973 3307 7999

$$

1 follow-up statement

000 
WGUS72 KCHS 111707
FFSCHS
SCC015-019-111715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
102 PM EDT FRI OCT 11 2002

...FLASH FLOOD WARNING FOR CHARLESTON AND SOUTHERN BERKELEY COUNTIES 
ALLOWED TO EXPIRE AT 1 PM...

AT 102 PM...CHARLESTON NATIONAL WEATHER SERVICE DOPPLER RADAR 
INDICATES THAT RAINFALL ASSOCIATED WITH TROPICAL STORM KYLE HAS 
MOVED EAST OF THE AREA.  ADDITIONAL HEAVY RAINS ARE NOT EXPECTED 
THIS AFTERNOON ACROSS CHARLESTON AND SOUTHERN BERKELEY COUNTIES.  
THUS THE FLASH FLOOD WARNINGS THAT WERE IN EFFECT FOR CHARLESTON AND 
SOUTHERN BERKELEY COUNTIES HAVE BEEN ALLOWED TO EXPIRE.

WATER CURRENTLY ON ROADWAYS WILL CONTINUE TO SLOWLY RECEDE THROUGH 
THE AFTERNOON.  AREAS NEAR DOWNTOWN CHARLESTON WILL SEE FLOODED 
ROADS PERSIST A LITTLE LONGER AS THE HIGH TIDES ARE PREVENTING THE 
ROADS FROM DRAINING. 

STAY TUNED TO NOAA WEATHER RADIO AND THE NATIONAL WEATHER SERVICE IN 
CHARLESTON FOR FURTHER UPDATES.

$$

PY

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 10, 8:48 PM EDT	Special Marine Warning	CHS		42 min
Oct 10, 9:26 PM EDT	Flash Flood Warning	CHS	Charleston	3 hr
Oct 10, 9:33 PM EDT	Special Marine Warning	CHS		57 min
Oct 10, 9:55 PM EDT	Tornado Warning	CHS	Charleston	50 min
Oct 11, 3:05 AM EDT	Special Marine Warning	CHS		55 min
Oct 11, 6:25 AM EDT	Tornado Warning	CHS	Colleton	35 min
Oct 11, 10:43 AM EDT	Flash Flood Warning	CHS	Berkeley	2 hr
Oct 11, 11:42 AM EDT	Severe Thunderstorm Warning	CHS	Berkeley	63 min
Oct 11, 12:59 PM EDT	Flash Flood Warning	CHS	Berkeley	3 hr

Nearby

Flash Flood Warnings in South Carolina, 2002 Every 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.