Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 13, NWS Columbia, SC

July 11, 2013Columbia County, Georgia

NWS Columbia, SC issued this flash flood warning at Jul 11, 2013, 6:21 PM EDT for Columbia County, Georgia. It was in force for 84 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 11, 2013, 6:21 PM EDT (22:21 UTC)
Expired
Jul 11, 2013, 7:45 PM EDT
In force
84 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

County Columbia County, GA

The radar

The Columbia radar (KCAE), 107 km from the middle of the area, began a volume at 22:23 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.4 hours before the alert went out and 212 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 2013-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 902 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2013-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -58 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
902 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-58 m²/s²
0-3 km storm-relative helicity
-28 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.

527 
WGUS52 KCAE 112221
FFWCAE
GAC073-112345-
/O.NEW.KCAE.FF.W.0013.130711T2221Z-130711T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
621 PM EDT THU JUL 11 2013

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN COLUMBIA COUNTY IN EAST CENTRAL GEORGIA...
  THIS INCLUDES THE CITIES OF...MARTINEZ...EVANS...

* UNTIL 745 PM EDT

* AT 614 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  NEARLY STATIONARY THUNDERSTORM OVER EVANS...PRODUCING VERY HEAVY
  RAIN OVER SOME OF THE AREA THAT EXPERIENCED FLOODING ON WEDNESDAY.
  RUNOFF OVER ALREADY SATURATED GROUND WILL LEAD TO SIGNIFICANT
  STREET FLOODING...INCLUDING ROADS THAT MAY BECOME IMPASSABLE...AND
  FLOODING OF OTHER LOW LYING FLOOD PRONE AREAS. VULNERABLE AREAS
  INCLUDE THE REED CREEK BASIN ANS SURROUNDING AREAS. MOTORISTS
  SHOULD USE EXTREME CAUTION.

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 USE
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.COLUMBIA.GOV TO RELAY
SEVERE WEATHER REPORTS.

&&

LAT...LON 3353 8221 3357 8212 3354 8203 3346 8215
      3347 8222

$$
2 follow-up statements
916 
WGUS72 KCAE 112251
FFSCAE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
651 PM EDT THU JUL 11 2013

GAC073-112345-
/O.CON.KCAE.FF.W.0013.000000T0000Z-130711T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLUMBIA GA-
651 PM EDT THU JUL 11 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
COLUMBIA COUNTY...

AT 646 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
RAIN ACTIVITY HAD DIMINISHED OVER THE WARNED AREA. 
HOWEVER...CONTINUED RUNOFF FROM PREVIOUS HEAVY RAINS WILL CONTINUE 
TO POSE A SIGNIFICANT STREET FLOODING THREAT...ESPECIALLY NEAR THE 
REED CREEK BASIN IN EVANS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. 

REPORT FLOODING TO YOUR COUNTY SHERIFF...OR USE
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.COLUMBIA.GOV TO RELAY
SEVERE WEATHER REPORTS.

&&

LAT...LON 3353 8221 3357 8212 3354 8203 3346 8215
      3347 8222

$$
482 
WGUS72 KCAE 112315
FFSCAE

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
715 PM EDT THU JUL 11 2013

GAC073-112323-
/O.CAN.KCAE.FF.W.0013.000000T0000Z-130711T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLUMBIA GA-
715 PM EDT THU JUL 11 2013

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

RADAR INDICATED RAIN HAD DISSIPATED. 

LAT...LON 3353 8221 3357 8212 3354 8203 3346 8215
      3347 8222

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 3:40 AM EDTFlash Flood WatchCAEBurke, Columbia, Lincoln, McDuffie, Richmond32 hr
Jul 11, 9:30 AM EDTRiver Flood WarningCAERichmond3 days
Jul 11, 5:32 PM EDTAreal Flood AdvisoryCAEColumbia, Richmond118 min
Jul 11, 5:53 PM EDTFlash Flood WarningCAERichmond82 min

Nearby

Flash Flood Warnings in Georgia, 2013Every flash flood warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.