Alert archive / South Carolina / Flash Flood Warnings in 2003

Flash Flood Warning 20, NWS Charleston, SC

July 26, 2003Berkeley County, Charleston County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jul 26, 2003, 6:06 AM EDT for Berkeley County, Charleston County, South Carolina. It was in force for 3 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
Jul 26, 2003, 6:06 AM EDT (10:06 UTC)
Expired
Jul 26, 2003, 9:00 AM EDT
In force
3 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), 114 km from the middle of the area, began a volume at 10:09 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 00:00Z, 10.1 hours before the alert went out and 28 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 00:00Z on 2003-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1122 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 00:00Z on 2003-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1122 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
712 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KCHS 261013
FFWCHS
SCC015-019-261300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
606 AM EDT SAT JUL 26 2003

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

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

* UNTIL 900 AM EDT

* AT 606 AM EDT...RADAR INDICATED VERY HEAVY RAIN OCCURRING ALONG A
  LINE EXTENDING FROM CROSS TO 3 MILES WEST OF HUGER TO 13 MILES EAST
  OF ISLE OF PALMS. THE THUNDERSTORMS PRODUCING THE HEAVY RAIN ARE   
  MOVING NORTHEAST AT 10 MPH.  AREAS FROM AWENDAW...TO               
  MCCLELLANVILLE...AND INTO SOUTHERN BERKELEY COUNTY NEAR JAMESTOWN  
  TO BETHERA...WILL LIKELY EXPERIENCE FLOODING RAINS OVER THE        
  NEXT SEVERAL HOURS.  IN ADDITION...RAINS OFFSHORE OF CHARLESTON    
  COUNTY WILL MOVE INLAND...PRODUCING FLOODING NEAR DOWNTOWN         
  CHARLESTON.

* FLASH FLOODING WILL OCCUR IN AND AROUND...
  PINOPOLIS AND MONCKS CORNER...
  CROSS...
  HUGER...
  EADYTOWN AND BONNEAU BEACH...
  BONNEAU...
  DOWNTOWN CHARLESTON...

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

TO REPORT SIGNIFICANT FLOODING...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON AT 843-747-5046.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLOODING IS OBSERVED...ACT
QUICKLY. MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN
AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3326 8033 3291 8006 3267 7995 3313 7927
          3332 7973 3353 8012

$$

PY
3 follow-up statements
000 
WGUS72 KCHS 261138
FFSCHS
SCC015-019-261300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
732 AM EDT SAT JUL 26 2003

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR BERKELEY AND
CHARLESTON COUNTIES UNTIL 900 AM EDT...

AT 732 AM...CHARLESTON DOPPLER RADAR INDICATES STRONG THUNDERSTORMS 
OFF THE COAST OF CHARLESTON COUNTY...APPROACHING BULLS BAY.  THESE 
STORMS...WITH RAIN RATES NEAR 2 INCHES PER HOUR...WILL MOVE ACROSS 
NORTHEAST CHARLESTON COUNTY FROM AWENDAW TO MCCLELLANVILLE.  THIS 
AREA IN PARTICULAR HAS ALREADY HAD 2 TO 3 INCHES OF RAIN THIS 
MORNING.  ANY ADDITIONAL RAINS WILL LIKELY CAUSE FLASH FLOODING. 

A LARGE AREA OF SHOWERS AND THUNDERSTORMS WILL ALSO MOVE ACROSS 
PORTIONS OF BERKELEY COUNTY...AND OVER THE AREA FROM BEAUFORT TO 
DOWNTOWN CHARLESTON.  THE POSSIBILITY OF FLASH FLOODING WILL 
CONTINUE THROUGH THE MORNING HOURS AS SHOWERS AND STORMS ARE LINING 
UP OFFSHORE...MOVING NORTH TOWARD THE COAST.  

STAY TUNED TO NOAA WEATHER RADIO OR THE LOCAL MEDIA FOR ADDITIONAL
SEVERE WEATHER INFORMATION. REPORT ANY FLOODING OR DAMAGE CAUSED BY
FLOODING TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN
CHARLESTON.

A FLOOD WATCH REMAINS IN EFFECT UNTIL NOON. 

LAT...LON 3338 7988 3311 7933 3270 7997 3321 8025

$$

PY
000 
WGUS72 KCHS 261231
FFSCHS
SCC015-019-261300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
825 AM EDT SAT JUL 26 2003

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR BERKELEY AND
CHARLESTON COUNTIES UNTIL 900 AM EDT...

AT 825 AM...CHARLESTON NATIONAL WEATHER SERVICE DOPPLER RADAR 
CONTINUES TO INDICATE A LARGE AREA OF SHOWER AND THUNDERSTORM 
ACTIVITY FROM NEAR BEAUFORT...TO LAKE MOULTRIE...AND BACK DOWN 
TOWARD MCCLELLANVILLE.   SOME OF THE HEAVIEST RAINS OVER THE NEXT 
HALF HOUR WILL OCCUR NEAR MCCLELLANVILLE...WHERE RAIN TOTALS OF 2 TO 
3 INCHES HAVE ALREADY FALLEN OVERNIGHT.  WHILE THE THREAT OF 
IMMINENT FLASH FLOODING HAS DECREASED OVER THE PAST HOUR...RUNOFF 
FROM EARLIER RAINS HAS THE POTENTIAL TO FLOOD AREA ROADS ACROSS MUCH 
OF BERKELEY COUNTY...AND THE NORTHERN HALF OF CHARLESTON COUNTY.  
THERE ARE REPORTS OF HIGH WATER ON CAINHOY ROAD AT CHARITY CHURCH 
ROAD.

STAY TUNED TO NOAA WEATHER RADIO OR THE LOCAL MEDIA FOR ADDITIONAL 
SEVERE WEATHER INFORMATION. REPORT ANY FLOODING OR DAMAGE CAUSED BY 
FLOODING TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO 
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN 
CHARLESTON.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO DRIVE WHERE
WATER COVERS THE ROADWAY.

A FLOOD WATCH REMAINS IN EFFECT UNTIL NOON.

LAT...LON 3329 7966 3314 7928 3270 7996 3318 8019

$$

PY
000 
WGUS72 KCHS 261311
FFSCHS
SCC015-019-261330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
904 AM EDT SAT JUL 26 2003

...THE FLASH FLOOD WARNING FOR BERKELEY AND CHARLESTON COUNTIES HAS
BEEN ALLOWED TO EXPIRE...

AT 904 AM...LIGHT TO MODERATE RAINS CONTINUE TO FALL THROUGHOUT 
BERKELEY AND CHARLESTON COUNTIES.  THIS IS ALLOWING FOR WATER TO 
RECEDE ACROSS THESE COUNTIES FOR THE TIME BEING.  WHILE SOME RURAL 
AND CITY ROADS ACROSS SOUTHERN BERKELEY AND NORTHEAST CHARLESTON 
COUNTY MAY REMAIN FLOODED OVER THE NEXT FEW HOURS...THE IMMINENT 
DANGER OF FLASH FLOODING OVER CHARLESTON AND BERKELEY COUNTIES WAS 
DIMINISHED.  HOWEVER...ADDITIONAL STORMS ARE FORMING OFF THE SOUTH 
CAROLINA COAST AND WILL LIKELY MOVE INLAND LATE THIS MORNING INTO 
THE AFTERNOON.  A FLOOD WATCH WILL REMAIN IN EFFECT UNTIL NOON...AND 
MAY BE EXTENDED THROUGH THE AFTERNOON HOURS.  

RESIDENTS OF SOUTHEAST SOUTH CAROLINA SHOULD BE ON THE LOOKOUT FOR 
HEAVY DOWNPOURS THIS MORNING.  MINOR STREET FLOODING WILL OCCUR VERY 
QUICKLY AS THESE STORMS WILL PRODUCE RAIN RATES OF 1 TO 2 INCHES PER 
HOUR.  MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO 
DRIVE WHERE WATER COVERS THE ROADWAY.

STAY TUNED TO NOAA WEATHER RADIO OR THE LOCAL MEDIA FOR ADDITIONAL 
SEVERE WEATHER INFORMATION. 

$$

PY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 8:04 PM EDTSpecial Marine WarningCHS86 min
Jul 25, 9:35 PM EDTSpecial Marine WarningCHS115 min

Nearby

Flash Flood Warnings in South Carolina, 2003Every flash flood warning in 2003

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.