Alert archive / South Carolina / Flash Flood Warnings in 2013

Flash Flood Warning 13, NWS Charleston, SC

June 30, 2013Berkeley County, Charleston County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jun 30, 2013, 2:50 PM EDT for Berkeley County, Charleston County, South Carolina. It was in force for 115 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 30, 2013, 2:50 PM EDT (18:50 UTC)
Expired: Jun 30, 2013, 4:45 PM EDT
In force: 115 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Flood severity: None

Counties Berkeley County, SC, Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 106 km from the middle of the area, began a volume at 18:49 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.

What was reported inside it

Time	Report	Where	Remark
Jun 30, 3:10 PM EDT	FLASH FLOOD	2 Nw Charleston, SC	DUNNEMAN AVENUE AT 10TH STREET IS UNDER WATER AND IMPASSABLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.8 hours before the alert went out and 18 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: 1458 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

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

828 
WGUS52 KCHS 301850
FFWCHS
SCC015-019-302045-
/O.NEW.KCHS.FF.W.0013.130630T1850Z-130630T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
250 PM EDT SUN JUN 30 2013

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

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

* UNTIL 445 PM EDT

* AT 244 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN OCCURRING FROM MOUNT PLEASANT TO JOHNS ISLAND.
  BETWEEN 2 AND 3 INCHES OF RAIN HAS FALLEN IN SOME AREAS
  SINCE EARLY AFTERNOON. AN ADDITIONAL 1 TO 2 INCHES COULD FALL
  THROUGH 445 PM. FLASH FLOODING IS ALREADY OCCURRING
  IN PARTS OF MOUNT PLEASANT AND DOWNTOWN CHARLESTON. THE RISK
  FOR ADDITIONAL FLASH FLOODING REMAINS HIGH THROUGHOUT THE
  WARNED AREA.

* FLASH FLOODING IS EXPECTED IN AND AROUND...
  DOWNTOWN CHARLESTON...WEST ASHLEY...DANIEL ISLAND...MOUNT
  PLEASANT...JAMES ISLAND...JOHNS ISLAND...SULLIVANS ISLAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AVOID DRIVING INTO WATER ON THE ROAD. THE WATER IS USUALLY DEEPER
THAN IT APPEARS AND THE ROAD MAY BE WASHED OUT. ONLY ONE FOOT OF
WATER WILL STALL A VEHICLE AND LESS THAN TWO FEET OF WATER CAN FLOAT
AND CARRY AWAY A VEHICLE. FLOODING IS THE NUMBER ONE WEATHER-RELATED
CAUSE OF DEATH IN THE UNITED STATES. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT FLOODING...CONTACT THE NATIONAL WEATHER SERVICE IN
CHARLESTON TOLL FREE AT 1-888-383-2024.

&&

LAT...LON 3275 7986 3277 7987 3277 7989 3278 7990
      3277 7991 3277 7992 3275 7991 3276 7989
      3276 7987 3274 7987 3274 7988 3273 7989
      3264 8010 3276 8017 3290 7991 3277 7981

$$

3 follow-up statements

107 
WGUS72 KCHS 301932
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
332 PM EDT SUN JUN 30 2013

SCC015-019-302045-
/O.CON.KCHS.FF.W.0013.000000T0000Z-130630T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-BERKELEY SC-
332 PM EDT SUN JUN 30 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR
EXTREME SOUTH CENTRAL BERKELEY AND CENTRAL CHARLESTON COUNTIES...

AT 319 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AREA OF BAND OF THUNDERSTORMS WITH HEAVY RAIN CAPABLE OF 
PRODUCING FLASH FLOODING. THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM MOUNT PLEASANT TO JOHNS ISLAND...OR ALONG A LINE 
EXTENDING FROM MOUNT PLEASANT TO 8 MILES SOUTH OF MAGNOLIA 
GARDENS...MOVING NORTH AT 15 MPH.

NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED THAT 1 TO 3 INCHES 
OF RAIN HAS FALLEN IN THIS AREA. MEDIA REPORTED THAT DUNNEMAN AVENUE 
AT 10TH STREET IN CHARLESTON...NEAR HAMPTON PARK...WAS FLOODED AND 
IMPASSABLE.   

HEAVIEST RAIN WILL SHIFT NORTH OF THE WARNED AREA BY 4 PM. HOWEVER...
STANDING WATER PRODUCED BY PREVIOUS HEAVY RAIN WILL CONTINUE TO 
RENDER SOME ROADS IMPASSABLE THROUGH 445 PM EDT. 

FLASH FLOODING IS EXPECTED IN AND AROUND DOWNTOWN CHARLESTON...
CHARLESTON...DANIEL ISLAND...JAMES ISLAND...JOHNS ISLAND...MOUNT
PLEASANT...NORTH CHARLESTON...SULLIVANS ISLAND...WEST ASHLEY...
CHARLES TOWNE LANDING...CHARLESTON NAVAL COMPLEX...FORT JOHNSON...
FORT SUMTER...JAMES ISLAND COUNTY PARK AND MAYBANK BRIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AVOID DRIVING INTO WATER ON THE ROAD. THE WATER IS USUALLY DEEPER
THAN IT APPEARS AND THE ROAD MAY BE WASHED OUT. ONLY ONE FOOT OF
WATER WILL STALL A VEHICLE AND LESS THAN TWO FEET OF WATER CAN FLOAT
AND CARRY AWAY A VEHICLE. FLOODING IS THE NUMBER ONE WEATHER-RELATED
CAUSE OF DEATH IN THE UNITED STATES. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT SIGNIFICANT FLOODING...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH
TWITTER USING #WXREPORT.

&&

LAT...LON 3275 7986 3277 7987 3277 7989 3278 7990
      3277 7991 3277 7996 3275 7991 3276 7989
      3276 7987 3274 7987 3274 7988 3273 7989
      3264 8010 3276 8017 3290 7991 3277 7981

$$

811 
WGUS72 KCHS 302024
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
424 PM EDT SUN JUN 30 2013

SCC015-019-302045-
/O.CON.KCHS.FF.W.0013.000000T0000Z-130630T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-BERKELEY SC-
424 PM EDT SUN JUN 30 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR
EXTREME SOUTH CENTRAL BERKELEY AND CENTRAL CHARLESTON COUNTIES...

AT 419 PM EDT...THE MEDIA REPORTED A FEW STREETS IN DOWNTOWN 
CHARLESTON IMPASSABLE DUE TO STANDING WATER PRODUCED BY PREVIOUS 
HEAVY RAIN. 

FLASH FLOODING IS EXPECTED IN AND AROUND DOWNTOWN CHARLESTON...
CHARLESTON...DANIEL ISLAND...MOUNT PLEASANT...NORTH CHARLESTON...
CHARLES TOWNE LANDING...CHARLESTON NAVAL COMPLEX...FORT JOHNSON AND
FORT SUMTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AVOID DRIVING INTO WATER ON THE ROAD. THE WATER IS USUALLY DEEPER
THAN IT APPEARS AND THE ROAD MAY BE WASHED OUT. ONLY ONE FOOT OF
WATER WILL STALL A VEHICLE AND LESS THAN TWO FEET OF WATER CAN FLOAT
AND CARRY AWAY A VEHICLE. FLOODING IS THE NUMBER ONE WEATHER-RELATED
CAUSE OF DEATH IN THE UNITED STATES. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT SIGNIFICANT FLOODING...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH
TWITTER USING #WXREPORT.

&&

LAT...LON 3280 7986 3275 7986 3277 7987 3277 7989
      3278 7990 3277 7991 3277 7996 3275 7991
      3276 7989 3276 7987 3274 7987 3274 7988
      3273 7989 3274 7997 3284 8003 3289 7993

$$

784 
WGUS72 KCHS 302041
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
441 PM EDT SUN JUN 30 2013

SCC015-019-302051-
/O.EXP.KCHS.FF.W.0013.000000T0000Z-130630T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHARLESTON SC-BERKELEY SC-
441 PM EDT SUN JUN 30 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM EDT FOR FOR EXTREME
SOUTH CENTRAL BERKELEY AND CENTRAL CHARLESTON COUNTIES...

ALTHOUGH THE SIGNIFICANT FLOODING HAS ENDED...DRAINAGE SYSTEMS AND
CULVERTS WILL REMAIN FULL. PONDING WATER WILL PERSIST IN LOW-LYING
AREAS AND MAY POSE A HAZARD TO MOTORISTS. STAY TUNED TO NOAA WEATHER
RADIO ALL-HAZARDS FOR THE LATEST WEATHER INFORMATION.

TO REPORT SIGNIFICANT FLOODING...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN CHARLESTON TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR
REPORTS TO CHS.SKYWARN@NOAA.GOV. REPORTS CAN ALSO BE SENT THROUGH
TWITTER USING #WXREPORT.

LAT...LON 3280 7986 3275 7986 3277 7987 3277 7989
      3278 7990 3277 7991 3277 7996 3275 7991
      3276 7989 3276 7987 3274 7987 3274 7988
      3273 7989 3274 7997 3284 8003 3289 7993

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 11:31 AM EDT	Special Marine Warning	CHS		29 min
Jun 30, 12:02 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Colleton, Dorchester	88 min
Jun 30, 12:58 PM EDT	Flash Flood Warning	CHS	Berkeley, Charleston	2 hr
Jun 30, 1:19 PM EDT	Flash Flood Watch	CHS	Allendale, Berkeley, Colleton, Dorchester, Hampton	70 hr
Jun 30, 2:24 PM EDT	Flash Flood Warning	CHS	Berkeley, Charleston	2 hr
Jun 30, 2:33 PM EDT	Special Weather Statement	CHS	Hampton	27 min
Jun 30, 2:39 PM EDT	Special Marine Warning	CHS		2 hr
Jun 30, 3:36 PM EDT	Special Weather Statement	CHS	Colleton	24 min
Jun 30, 3:42 PM EDT	Special Weather Statement	CHS	Jasper	48 min
Jun 30, 4:15 PM EDT	Special Weather Statement	CHS	Colleton, Dorchester	30 min
Jun 30, 4:20 PM EDT	Special Weather Statement	CHS	Hampton	40 min
Jun 30, 4:27 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Colleton, Dorchester	63 min
Jun 30, 4:30 PM EDT	Tornado Warning	CHS	Berkeley, Dorchester	45 min
Jun 30, 4:51 PM EDT	Special Weather Statement	CHS	Berkeley	24 min
Jun 30, 5:10 PM EDT	Areal Flood Advisory	CHS	Beaufort, Berkeley, Charleston, Colleton, Dorchester	2 hr
Jun 30, 5:29 PM EDT	Flash Flood Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	3 hr
Jun 30, 5:35 PM EDT	Special Weather Statement	CHS	Berkeley	40 min
Jun 30, 5:55 PM EDT	Tornado Warning	CHS	Berkeley	50 min
Jun 30, 6:02 PM EDT	Areal Flood Advisory	CHS	Allendale, Hampton	118 min

Nearby

Flash Flood Warnings in South Carolina, 2013 Every flash flood warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.