Alert archive / South Carolina / Flash Flood Warnings in 2014

Flash Flood Warning 9, NWS Charleston, SC

June 23, 2014Berkeley County, Charleston County, Dorchester County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jun 23, 2014, 4:01 PM EDT for Berkeley County, Charleston County, Dorchester County, South Carolina. It was in force for 119 min. 5 reports 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 23, 2014, 4:01 PM EDT (20:01 UTC)
Expired: Jun 23, 2014, 6:00 PM EDT
In force: 119 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Flood severity: None

Counties Berkeley County, SC, Charleston County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 99 km from the middle of the area, began a volume at 20:01 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 23, 4:09 PM EDT	HEAVY RAIN 4.03	3 Ssw Ladson, SC
Jun 23, 4:20 PM EDT	FLASH FLOOD	2 Nw Hanahan, SC	WARNING POINT REPORTED ROAD CLOSED AT NORTHWOODS BOULEVARD NEAR RIVERS AVENUE DUE TO FLOODING.
Jun 23, 4:37 PM EDT	FLASH FLOOD	3 S Ladson, SC	MEDIA REPORTED 2 PEOPLE RESCUED FROM CAR IN HIGH WATER NEAR MAPLE GROVE DRIVE AND PATRIOT BOULEVARD.
Jun 23, 4:41 PM EDT	HEAVY RAIN 0	2 Ne Archdale, SC	PUBLIC REPORTED 2 INCHES OF WATER ON ROAD AT ASHLEY PHOSPHATE ROAD NEAR CROSS COUNTY ROAD. REPORT VIA TWITTER.
Jun 23, 5:29 PM EDT	HEAVY RAIN 4.42	3 Ssw Ladson, SC

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, 8.0 hours before the alert went out and 11 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: 871 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 59 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.

673 
WGUS52 KCHS 232001
FFWCHS
SCC015-019-035-232200-
/O.NEW.KCHS.FF.W.0009.140623T2001Z-140623T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
401 PM EDT MON JUN 23 2014

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...
  SOUTHEASTERN DORCHESTER COUNTY IN SOUTHEAST SOUTH CAROLINA...

* UNTIL 600 PM EDT

* AT 357 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN OCCURRING ALONG A LINE EXTENDING FROM SLANDS BRIDGE
  TO HANAHAN TO 11 MILES NORTHEAST OF WANDO. THE AREA OF HEAVY RAIN  
  WAS NEARLY STATIONARY.

* FLASH FLOODING IS EXPECTED IN AND AROUND...
  CHARLESTON INTERNATIONAL AIRPORT...ARCHDALE...HANAHAN...SLANDS 
  BRIDGE...NAVAL WEAPONS STATION CHARLESTON...SUMMERVILLE...
  MIDDLETON PLACE...MAGNOLIA GARDENS...NORTH CHARLESTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WATER DEPTH IS NEARLY IMPOSSIBLE TO DETERMINE AT NIGHT. DO NOT
ATTEMPT TO CROSS WATER ON THE ROADWAY EVEN IF IT APPEARS SHALLOW.
FIND AN ALTERNATE ROUTE. A SHORT DELAY IN YOUR TRAVEL PLANS IS BETTER
THAN LOSING YOUR CAR...OR YOUR LIFE.

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

&&

LAT...LON 3306 8026 3302 8004 3305 7980 3297 7968
      3281 7998 3291 8039

$$

3 follow-up statements

287 
WGUS72 KCHS 232025
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
425 PM EDT MON JUN 23 2014

SCC015-019-035-232200-
/O.CON.KCHS.FF.W.0009.000000T0000Z-140623T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DORCHESTER SC-CHARLESTON SC-BERKELEY SC-
425 PM EDT MON JUN 23 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR SOUTH
CENTRAL BERKELEY...CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER
COUNTIES...

AT 420 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AREA OF HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING 
FROM SLANDS BRIDGE EAST TO NORTH CHARLESTON AND CAINHOY.
NEARLY 2 TO 5 INCHES OF RAIN HAS FALLEN ACROSS MUCH OF THIS AREA TODAY.
AN ADDITIONAL 1 TO 2 INCHES CAN BE EXPECTED THROUGH 6 PM. AT 420 PM...
LOCAL LAW ENFORCEMENT OFFICIALS REPORTED NORTHWOODS BOULEVARD WAS CLOSED
NEAR THE NORTHWOODS MALL DUE TO FLASH FLOODING. IN ADDITIONAL...AN 
OBSERVATION SITE NEAR LADSON HAS REPORTED 4.28 INCHES OF RAIN.

FLASH FLOODING IS EXPECTED IN AND AROUND CAINHOY...CHARLESTON INTL
AIRPORT...COLLEGE PARK...DANIEL ISLAND...GOOSE CREEK...HANAHAN...
JEDBURG...KNIGHTSVILLE...LADSON...NORTH CHARLESTON...SHADOWMOSS...
SUMMERVILLE...WANDO...ARCHDALE...CHARLESTON NAVAL COMPLEX...CROWFIELD
PLANTATION...DON HOLT BRIDGE...I-26/I-526 INTERCHANGE...MAGNOLIA
GARDENS...MIDDLETON PLACE...NAVAL WEAPONS STATION CHARLESTON AND
SLANDS BRIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE MAJORITY OF FLOOD DEATHS ARE DUE TO PEOPLE DRIVING INTO WATER OF
UNKNOWN DEPTH. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO
SWEEP VEHICLES OFF THE ROAD. EVEN MODERN SPORT UTILITY VEHICLES ARE
VULNERABLE TO FLOODING. TO AVOID THE RISK OF DEATH...FIND AN
ALTERNATE ROUTE IF THE ROAD IS FLOODED.

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 3306 8026 3302 8004 3305 7980 3297 7968
      3281 7998 3291 8039

$$

108 
WGUS72 KCHS 232118
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
518 PM EDT MON JUN 23 2014

SCC015-019-035-232200-
/O.CON.KCHS.FF.W.0009.000000T0000Z-140623T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DORCHESTER SC-CHARLESTON SC-BERKELEY SC-
518 PM EDT MON JUN 23 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR SOUTH
CENTRAL BERKELEY...CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER
COUNTIES...

AT 512 PM EDT...RADAR INDICATED MAINLY LIGHT TO OCCASIONALLY MODERATE
RAINFALL FALLING ACROSS THE FLASH FLOOD WARNING AREA. ALTHOUGH THE RISK
FOR ADDITIONAL FLOODING IS DIMINISHING...IT WILL TAKE SOME TIME FOR
FLOOD WATERS TO DIMINISH. THE FLASH FLOOD WARNING REMAINS IN EFFECT
UNTIL 6 PM.

FLASH FLOODING IS EXPECTED IN AND AROUND CAINHOY...CHARLESTON INTL
AIRPORT...COLLEGE PARK...DANIEL ISLAND...GOOSE CREEK...HANAHAN...
JEDBURG...KNIGHTSVILLE...LADSON...NORTH CHARLESTON...SHADOWMOSS...
SUMMERVILLE...WANDO...ARCHDALE...CHARLESTON NAVAL COMPLEX...CROWFIELD
PLANTATION...DON HOLT BRIDGE...I-26/I-526 INTERCHANGE...MAGNOLIA
GARDENS...MIDDLETON PLACE...NAVAL WEAPONS STATION CHARLESTON AND
SLANDS 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.

KEEP CHILDREN AWAY FROM STORM DRAINS...WATER CATCHMENTS...AND
STREAMS. ONLY A FEW INCHES OF MOVING WATER CAN KNOCK A CHILD OFF
THEIR FEET AND SWEEP THEM TO THEIR DEATH.

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 3306 8026 3302 8004 3305 7980 3297 7968
      3281 7998 3291 8039

$$

679 
WGUS72 KCHS 232151
FFSCHS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
551 PM EDT MON JUN 23 2014

SCC015-019-035-232202-
/O.EXP.KCHS.FF.W.0009.000000T0000Z-140623T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DORCHESTER SC-CHARLESTON SC-BERKELEY SC-
551 PM EDT MON JUN 23 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM EDT FOR FOR SOUTH
CENTRAL BERKELEY...CENTRAL CHARLESTON AND SOUTHEASTERN DORCHESTER
COUNTIES...

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 3306 8026 3302 8004 3305 7980 3297 7968
      3281 7998 3291 8039

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 8:10 PM EDT	Special Weather Statement	CHS	Dorchester	35 min
Jun 23, 5:44 AM EDT	Special Marine Warning	CHS		2 hr
Jun 23, 6:59 AM EDT	Special Marine Warning	CHS		2 hr
Jun 23, 8:57 AM EDT	Special Marine Warning	CHS		93 min
Jun 23, 10:28 AM EDT	Special Marine Warning	CHS		62 min
Jun 23, 12:23 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Dorchester	112 min
Jun 23, 2:06 PM EDT	Areal Flood Advisory	CHS	Beaufort, Colleton	84 min
Jun 23, 2:30 PM EDT	Special Weather Statement	CHS	Beaufort	30 min
Jun 23, 2:40 PM EDT	Areal Flood Advisory	CHS	Beaufort	95 min
Jun 23, 3:25 PM EDT	Special Weather Statement	CHS	Jasper	35 min
Jun 23, 3:33 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Dorchester	57 min
Jun 23, 3:52 PM EDT	Areal Flood Advisory	CHS	Beaufort, Jasper	53 min
Jun 23, 4:30 PM EDT	Areal Flood Advisory	CHS	Beaufort, Jasper	60 min
Jun 23, 5:16 PM EDT	Flash Flood Warning	CHS	Jasper	4 hr
Jun 23, 7:12 PM EDT	Special Marine Warning	CHS		2 hr

Nearby

Flash Flood Warnings in South Carolina, 2014 Every flash flood warning in 2014

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.