Alert archive / Georgia / Flash Flood Warnings in 2012

Flash Flood Warning 10, NWS Columbia, SC

August 7, 2012Columbia County, McDuffie County, Richmond County, Georgia

NWS Columbia, SC issued this flash flood warning at Aug 7, 2012, 7:45 PM EDT for Columbia County, McDuffie County, Richmond County, Georgia. It was in force for 2 hr. 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
Aug 7, 2012, 7:45 PM EDT (23:45 UTC)
Expired
Aug 7, 2012, 9:45 PM EDT
In force
2 hr
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

Counties Columbia County, GA, McDuffie County, GA, Richmond County, GA

The radar

The Columbia radar (KCAE), 112 km from the middle of the area, began a volume at 23:47 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
Aug 7, 7:53 PM EDTFLASH FLOOD2 Ene Martinez, GA3 1/2 FEET OF WATER COVERING HABERSHAM RD IN THE WATERVALE SUBDIVISION.
Aug 7, 7:54 PM EDTFLASH FLOOD5 Nw Augusta, GAWATER INSIDE AN APARTMENT COMPLEX ON STEVENS CREEK RD.
Aug 7, 7:56 PM EDTFLASH FLOOD2 N Augusta, GAWATER INSIDE A PERSONAL CARE HOME ON DIVISION ST.
Aug 7, 7:59 PM EDTFLASH FLOOD2 N Augusta, GAVEHICLE FLOODED IN THE 100 BLOCK OF WOOD ST WITH A PERSON INSIDE, WATER RESCUE IN PROGRESS.
Aug 7, 7:59 PM EDTFLASH FLOOD2 Ssw Augusta, GAFLOODING AT BUNGALOW RD AND PEACH ORCHARD RD, ROAD CLOSED

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, 11.8 hours before the alert went out and 208 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 2012-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2260 joules per kilogram.LCLEL10008507005003002001001 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 2012-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939Sfc1 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
2260 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
63 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.

489 
WGUS52 KCAE 072345
FFWCAE
GAC073-189-245-080145-
/O.NEW.KCAE.FF.W.0010.120807T2345Z-120808T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
745 PM EDT TUE AUG 7 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN COLUMBIA COUNTY IN EAST CENTRAL GEORGIA...
  THIS INCLUDES THE CITIES OF...MARTINEZ...GROVETOWN...EVANS...
  SOUTHERN MCDUFFIE COUNTY IN EAST CENTRAL GEORGIA...
  NORTHERN RICHMOND COUNTY IN EAST CENTRAL GEORGIA...
  THIS INCLUDES THE CITIES OF...FORT GORDON...AUGUSTA...

* UNTIL 945 PM EDT

* AT 736 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  BAND OF NEARLY STATIONARY SHOWERS AND THUNDERSTORMS PRODUCING VERY
  HEAVY RAIN THAT STRETCHED OVER THE WARNED AREA. RADAR ESTIMATED
  THAT UP TO 3 INCHES OF RAIN HAD FALLEN IN SOME LOCATIONS IN THE
  PAST 60 TO 90 MINUTES...AND ADDITIONAL RAINFALL AMOUNT OF 2 INCHES
  OR MORE WILL BE POSSIBLE. 

AREAS VULNERABLE TO FLASH FLOODING INCLUDE THE REED CREEK BASIN IN 
EASTERN COLUMBIA COUNTY GEORGIA...RAES CREEK BASIN AND FOX CREEK 
BASIN IN NORTHERN RICHMOND COUNTY GEORGIA. URBAN STREET FLOODING IS 
EXPECTED THROUGHOUT THE GREATER AUGUSTA METROPOLITAN AREA...AND 
ALONG INTERSTATE 20. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

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 3359 8209 3353 8201 3349 8199 3346 8192
      3344 8191 3342 8193 3342 8191 3341 8195
      3338 8193 3337 8195 3335 8194 3328 8230
      3331 8234 3331 8239 3334 8245 3335 8256
      3341 8255 3344 8258

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 7:10 PM EDTAreal Flood AdvisoryCAEColumbia, Richmond110 min

Nearby

Flash Flood Warnings in Georgia, 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.