Alert archive / South Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 3, NWS Charleston, SC
NWS Charleston, SC issued this flash flood warning at May 29, 2012, 10:36 PM EDT for Beaufort County, Jasper County, South Carolina. It was in force for 2 hr. 2 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
- May 29, 2012, 10:36 PM EDT (02:36 UTC)
- Expired
- May 30, 2012, 12:40 AM EDT
- In force
- 2 hr
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Flood severity
- None
Counties Beaufort County, SC, Jasper County, SC
The radar
The Charleston,SC radar (KCLX), 11 km from the middle of the area, began a volume at 02:37 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 |
|---|---|---|---|
| May 29, 10:45 PM EDT | HEAVY RAIN 6 | 1 Sw Grahamville, SC | TOTAL RAINFALL HAD OCCURRED SINCE 6 PM. MOST OF THIS RAIN HAD FALLEN SINCE 830 PM. |
| May 29, 11:43 PM EDT | HEAVY RAIN 0 | Ridgeland, SC | LAW ENFORCEMENT REPORTED STANDING WATER ON ROUTE 17 ABOUT ONE-HALF MILE WEST OF THE ROUTE 336 INTERSECTION. ROUTE 17 WAS STILL OPEN TO TRAFFIC. |
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 00:00Z, 2.6 hours before the alert went out and 98 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.
- Mixed-layer CAPE
- 907 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
355
WGUS52 KCHS 300236
FFWCHS
SCC013-053-300530-
/O.NEW.KCHS.FF.W.0003.120530T0236Z-120530T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
1036 PM EDT TUE MAY 29 2012
THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN BEAUFORT COUNTY IN SOUTHEAST SOUTH CAROLINA...
CENTRAL JASPER COUNTY IN SOUTHEAST SOUTH CAROLINA...
* UNTIL 130 AM EDT
* AT 1032 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OCCURRING NEAR GRAHAMVILLE...OR ABOUT OVER
RIDGELAND...MOVING NORTHEAST AT 5 MPH.
TORRENTIAL RAINFALL NOT FAR THE CENTER OF TROPICAL DEPRESSION BERYL
WAS FALLING OVER THE AREA. RADAR ESTIMATED 2 TO 3 INCHES OF RAIN
HAD FALLEN AND AN ADDITIONAL 2 INCHES OR MORE IS POSSIBLE.
* FLASH FLOODING IS EXPECTED IN AND AROUND...
GRAHAMVILLE...RIDGELAND...LAUREL BAY...BURTON...CLARENDON...
GILLISONVILLE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU CAN NOT SEE THE ROAD DUE TO INTENSE NIGHT RAINFALL...YOU
SHOULD NOT DRIVE.
&&
LAT...LON 3265 8111 3266 8096 3265 8096 3262 8090
3267 8087 3267 8077 3245 8070 3228 8092
3242 8116 3257 8125
$$3 follow-up statements
978
WGUS72 KCHS 300313
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1113 PM EDT TUE MAY 29 2012
SCC013-053-300530-
/O.CON.KCHS.FF.W.0003.000000T0000Z-120530T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER SC-BEAUFORT SC-
1113 PM EDT TUE MAY 29 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM EDT FOR
NORTHWESTERN BEAUFORT AND CENTRAL JASPER COUNTIES...
AT 1110 PM EDT...DOPPLER RADAR INDICATED INTENSE RAINFALL CONTINUING
OVER JASPER COUNTY FROM RIDGELAND TO COOSAWHATCHIE...MOVING VERY
LITTLE. A TRAINED WEATHER SPOTTER NEAR GRAHAMVILLE REPORTED FLASH
FLOODING WITH OVER 6 INCHES OF RAIN THIS EVENING. THIS TORRENTIAL
RAINFALL WAS ASSOCIATED WITH TROPICAL DEPRESSION BERYL AND WILL BE
CAPABLE OF DUMPING ANOTHER 2-4 INCHES OVER PARTS OF THE WARNING AREA
PRODUCING SUBSTANTIAL FLASH FLOODING.
FLASH FLOODING IS EXPECTED IN AND AROUND BURTON...CLARENDON...
COOSAWHATCHIE...GARDENS CORNER...GILLISONVILLE... GRAHAMVILLE...
JASPER...LAUREL BAY...LEMON ISLAND...OLD HOUSE...PINELAND...
POCOTALIGO...RIDGELAND...ROBERTVILLE...SHELDON...AND SWITZERLAND.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE MAJORITY OF FLOOD DEATHS ARE DUE TO PEOPLE DRIVING INTO WATER OF
UNKNOWN DEPTH. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO
SWEEP VEHICLES OFF THE ROAD. EVEN MODERN SPORT UTILITY VEHICLES ARE
VULNERABLE TO FLOODING. TO AVOID THE RISK OF DEATH...FIND AN
ALTERNATE ROUTE IF THE ROAD IS FLOODED.
&&
LAT...LON 3265 8111 3266 8096 3265 8096 3262 8090
3267 8087 3267 8077 3245 8070 3228 8092
3242 8116 3257 8125
$$149
WGUS72 KCHS 300401
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1201 AM EDT WED MAY 30 2012
SCC013-053-300530-
/O.CON.KCHS.FF.W.0003.000000T0000Z-120530T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER SC-BEAUFORT SC-
1201 AM EDT WED MAY 30 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM EDT FOR
NORTHWESTERN BEAUFORT AND CENTRAL JASPER COUNTIES...
AT 1155 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING OVER THE
WARNED AREA. THE INTENSITY OF THE RAIN WAS DIMINISHING AS TROPICAL
DEPRESSION BERYL SLOWLY MOVES BY.
FLASH FLOODING IS EXPECTED IN AND AROUND CLARENDON...
COOSAWHATCHIE...GARDENS CORNER...GILLISONVILLE... GRAHAMVILLE...
JASPER...LAUREL BAY...LEMON ISLAND...OLD HOUSE...PINELAND...
POCOTALIGO...RIDGELAND...ROBERTVILLE...SHELDON...SWITZERLAND...
TARBORO AND TILLMAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3265 8111 3266 8096 3265 8096 3262 8090
3267 8087 3267 8077 3245 8070 3228 8092
3242 8116 3257 8125
$$528
WGUS72 KCHS 300440
FFSCHS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1240 AM EDT WED MAY 30 2012
SCC013-053-300449-
/O.CAN.KCHS.FF.W.0003.000000T0000Z-120530T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER SC-BEAUFORT SC-
1240 AM EDT WED MAY 30 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
BEAUFORT AND CENTRAL JASPER COUNTIES...
ALTHOUGH THE SIGNIFICANT FLOODING HAS ENDED...DRAINAGE SYSTEMS AND
CULVERTS WILL REMAIN FULL. PONDING WATER WILL PERSIST IN LOW-LYING
AREAS AND MAY POSE A HAZARD TO MOTORISTS. STAY TUNED TO NOAA WEATHER
RADIO ALL-HAZARDS FOR THE LATEST WEATHER INFORMATION.
LAT...LON 3265 8111 3266 8096 3265 8096 3262 8090
3267 8087 3267 8077 3245 8070 3228 8092
3242 8116 3257 8125
$$The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 9:00 PM EDT | Areal Flood Advisory | CHS | Berkeley, Dorchester | 3 hr |
| May 29, 9:08 PM EDT | Areal Flood Advisory | CHS | Allendale | 112 min |
| May 29, 9:59 PM EDT | Areal Flood Advisory | CHS | Beaufort, Hampton, Jasper | 2 hr |
| May 29, 11:28 PM EDT | Areal Flood Advisory | CHS | Berkeley, Charleston, Dorchester | 3 hr |
| May 29, 11:51 PM EDT | Flash Flood Warning | CHS | Beaufort, Berkeley, Charleston, Colleton, Dorchester | 3 hr |
| May 30, 12:05 AM EDT | Special Weather Statement | CHS | Berkeley, Charleston | 85 min |
| May 30, 6:42 AM EDT | Lake Wind Advisory | CHS | Berkeley | 4 hr |
Nearby
Flash Flood Warnings in South Carolina, 2012Every flash flood warning in 2012
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.