Alert archive / South Carolina / Flash Flood Warnings in 2016

Flash Flood Warning 10, NWS Columbia, SC

September 2, 20169 counties in South Carolina; Columbia County, Richmond County, Georgia

NWS Columbia, SC issued this flash flood warning at Sep 2, 2016, 3:07 PM EDT for 9 counties in South Carolina; Columbia County, Richmond County, Georgia. It was in force for 3 hr. 9 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
Sep 2, 2016, 3:07 PM EDT (19:07 UTC)
Expired
Sep 2, 2016, 6:00 PM EDT
In force
3 hr
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

Counties Columbia County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Clarendon County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 49 km from the middle of the area, began a volume at 19:08 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

TimeReportWhereRemark
Sep 2, 4:01 PM EDTFLASH FLOOD1 Se Irmo, SCSPOTTER REPORTS KINLEY CREEK IN SEVEN OAKS AREA EXCEEDING ITS BANKS, WATER RUNNING OVER ROADWAYS.
Sep 2, 4:08 PM EDTFLASH FLOOD2 Ssw Irmo, SCSPOTTER REPORTED RAWLS CREEK EXCEEDING ITS BANKS IN IRMO. WATER APPROACHING HOUSES.
Sep 2, 4:10 PM EDTFLASH FLOOD1 Ssw Forest Acres, SCTRENHOLM ROAD CLOSED BETWEEN WYNDHAM RD AND TANGLEWOOD RD DUE TO ROADWAY FLOODING.
Sep 2, 4:15 PM EDTFLASH FLOOD2 Ne Aiken, SCINTERSECTION OF RICHLAND AVE AND GASTON ROAD CLOSED DUE TO ROADWAY FLOODING.
Sep 2, 4:19 PM EDTHEAVY RAIN 52 N Aiken, SCSPOTTER IN AIKEN.
Sep 2, 5:06 PM EDTFLASH FLOOD1 Ese Sumter, SCTHE POND IN PALMETTO PARK HAS OVERFLOWED ITS BANKS AND SPILLED INTO THE PALMETTO POINTE APARTMENT COMPLEX PARKING LOT.
Sep 2, 5:10 PM EDTFLASH FLOODSumter, SCWATER COVERING THE ROADWAY NEAR CLEMATIS TRAIL AND SHADOW TRAIL. WATER IS 3 TO 4 FEET DEEP.
Sep 2, 5:43 PM EDTFLASH FLOOD1 Ne Sumter, SCLAW ENFORCEMENT CLOSED PORTION OF HWY 521 AT US 378 OVERPASS DUE TO FLOODING.
Sep 2, 6:05 PM EDTFLASH FLOOD5 Nw Summerton, SCROADWAY FLOODING PANOLA RD AND AT HARDWOOD DRIVE.

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, 7.1 hours before the alert went out and 117 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 12:00Z on 2016-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 253 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 12:00Z on 2016-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.193958Sfc1 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
253 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
476 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
362 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.9

Open this sounding in Storm Lab

The text

As transmitted.

878 
WGUS52 KCAE 021907
FFWCAE
GAC073-245-SCC003-009-011-017-027-063-075-079-085-022200-
/O.NEW.KCAE.FF.W.0010.160902T1907Z-160902T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
307 PM EDT FRI SEP 2 2016

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN COLUMBIA COUNTY IN EAST CENTRAL GEORGIA...
  RICHMOND COUNTY IN EAST CENTRAL GEORGIA...
  ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA...
  CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA...
  BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA...
  RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA...
  LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA...
  BAMBERG COUNTY IN CENTRAL SOUTH CAROLINA...
  AIKEN COUNTY IN CENTRAL SOUTH CAROLINA...
  CLARENDON COUNTY IN CENTRAL SOUTH CAROLINA...
  SUMTER COUNTY IN CENTRAL SOUTH CAROLINA...

* UNTIL 600 PM EDT

* AT 303 PM EDT...DOPPLER RADAR INDICATED MODERATE TO HEAVY RAIN
  ACROSS THE WARNED AREA. FLASH FLOODING HAS BEEN OBSERVED. MANY
  AREAS HAVE RECEIVED 2 TO 4 INCHES OF RAINFALL IN THE PAST 3 HOURS.
  MODERATE TO HEAVY RAIN WILL CONTINUE THROUGH THE REST OF THE
  AFTERNOON WITH ADDITIONAL RAINFALL AMOUNTS UP TO 3 INCHES. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  COLUMBIA...SUMTER...AIKEN...NORTH AUGUSTA...LEXINGTON...
  WEST COLUMBIA...ORANGEBURG...CAYCE...GROVETOWN...IRMO...
  FOREST ACRES...BARNWELL...MANNING...BAMBERG...DENMARK...
  SPRINGDALE...BELVEDERE...ST. ANDREWS...FORT GORDON AND DENTSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3345 8022 3330 8025 3326 8043 3333 8051
      3306 8090 3310 8094 3303 8108 3312 8119
      3316 8154 3309 8165 3326 8188 3326 8212
      3342 8222 3388 8157 3424 8132 3418 8118
      3424 8104 3407 8072 3410 8064 3383 7991

$$

LM

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 9:05 PM EDTHigh Wind WarningCAEAiken, Bamberg, Barnwell, Calhoun, Clarendon, Lee and 3 more25 hr
Sep 2, 12:31 AM EDTAreal Flood AdvisoryCAEFairfield, Kershaw, Lexington, Newberry, Richland, Saluda and 1 more119 min
Sep 2, 3:54 AM EDTWind AdvisoryCAEChesterfield, Edgefield, Fairfield, Kershaw, McCormick, Newberry and 1 more17 hr
Sep 2, 11:56 AM EDTFlash Flood WarningCAEBamberg, Barnwell, Calhoun, Clarendon, Orangeburg4 hr
Sep 2, 12:58 PM EDTTornado WarningCAELee, Sumter23 min
Sep 2, 1:24 PM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Lexington, Richland, Sumter111 min
Sep 2, 4:27 PM EDTRiver Flood WarningCAEOrangeburg4 days
Sep 2, 5:49 PM EDTFlash Flood WarningCAECalhoun, Clarendon, Kershaw, Lee, Lexington, Orangeburg and 2 more3 hr

Nearby

Flash Flood Warnings in South Carolina, 2016Flash Flood Warnings in Georgia, 2016Every flash flood warning in 2016

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.