Alert archive / South Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 5, NWS Columbia, SC

June 11, 2012Richland County, South Carolina

NWS Columbia, SC issued this flash flood warning at Jun 11, 2012, 12:32 PM EDT for Richland County, South Carolina. It was in force for 50 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 11, 2012, 12:32 PM EDT (16:32 UTC)
Expired: Jun 11, 2012, 1:22 PM EDT
In force: 50 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Flood severity: None

County Richland County, SC

The radar

The Columbia radar (KCAE), 9 km from the middle of the area, began a volume at 16:33 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 11, 12:49 PM EDT	FLASH FLOOD	3 Ne Cayce, SC	KANGAROO GAS STATION REPORTED ROAD CLOSED AT WHALEY AND MAIN STREET INTERSECTION IN COLUMBIA 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, 4.5 hours before the alert went out and 151 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: 389 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

506 
WGUS52 KCAE 111632
FFWCAE
SCC079-111730-
/O.NEW.KCAE.FF.W.0005.120611T1632Z-120611T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1232 PM EDT MON JUN 11 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA...
  THIS INCLUDES THE CITIES OF...FOREST ACRES...COLUMBIA...

* UNTIL 130 PM EDT

* AT 1220 PM EDT...HEAVY RAIN FROM RAIN SHOWERS WILL CAUSE FLASH 
  FLOODING IN THE METROPOLITAN AREA OF COLUMBIA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FIVE POINTS
  AND ARCADIA LAKES

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF THE FIVE 
POINTS AREA EXTENDING DOWNSTREAM ALONG ROCKY BRANCH CREEK. THIS 
INCLUDES MAXCY GREGG PARK...THE PICKENS BLOSSOM STREET INTERSECTION 
AND THE WHALEY MAIN STREET INTERSECTION.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

REPORT FLOODING TO YOUR COUNTY SHERIFF...OR CALL THE NATIONAL WEATHER
SERVICE...TOLL FREE 1 877 6 3 3...6 7 7 2.


REPORT FLOODING TO YOUR COUNTY SHERIFF...OR CALL THE NATIONAL WEATHER
SERVICE...TOLL FREE 1 877 6 3 3...6 7 7 2.

LAT...LON 3389 8102 3390 8101 3391 8103 3393 8102
      3398 8105 3399 8105 3402 8110 3403 8111
      3411 8098 3392 8087

$$

1 follow-up statement

961 
WGUS72 KCAE 111722
FFSCAE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
122 PM EDT MON JUN 11 2012

SCC079-111731-
/O.CAN.KCAE.FF.W.0005.000000T0000Z-120611T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RICHLAND SC-
122 PM EDT MON JUN 11 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR RICHLAND COUNTY...

THE HEAVY RAIN THAT CAUSED FLOODING ALONG ROCKY BRANCH CREEK HAS 
MOVED EAST OF THE AREA AND WATER IS RECEDING ALONG THE CREEK.

REPORT FLOODING TO YOUR COUNTY SHERIFF...OR CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 877 6 3 3...6 7 7 2.

LAT...LON 3389 8102 3390 8101 3391 8103 3393 8102
      3398 8105 3399 8105 3402 8110 3403 8111
      3411 8098 3392 8087

$$

LAMBERTY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 9:30 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	45 min
Jun 10, 9:34 PM EDT	Tornado Warning	CAE	Newberry	26 min
Jun 10, 9:57 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	78 min
Jun 11, 11:57 AM EDT	Areal Flood Advisory	CAE	Aiken, Barnwell	108 min
Jun 11, 12:10 PM EDT	Areal Flood Advisory	CAE	Lexington, Richland	65 min
Jun 11, 12:39 PM EDT	Flood Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	39 hr
Jun 11, 12:39 PM EDT	Areal Flood Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Clarendon, Fairfield and 7 more	111 min
Jun 11, 1:09 PM EDT	Tornado Warning	CAE	Calhoun, Orangeburg	36 min
Jun 11, 1:59 PM EDT	Areal Flood Advisory	CAE	Chesterfield, Kershaw, Lancaster	2 hr
Jun 11, 2:53 PM EDT	Areal Flood Advisory	CAE	Bamberg, Clarendon, Lee, Orangeburg, Sumter	112 min

Nearby

Flash Flood Warnings in South Carolina, 2012 Every 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.