Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 8, NWS Columbia, SC

July 9, 2013McCormick County, South Carolina; Columbia County, Lincoln County, Georgia

NWS Columbia, SC issued this flash flood warning at Jul 9, 2013, 10:03 PM EDT for McCormick County, South Carolina; Columbia County, Lincoln County, Georgia. It was in force for 87 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 9, 2013, 10:03 PM EDT (02:03 UTC)
Expired: Jul 9, 2013, 11:30 PM EDT
In force: 87 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Flood severity: None

Counties Columbia County, GA, Lincoln County, GA, McCormick County, SC

The radar

The Columbia radar (KCAE), 104 km from the middle of the area, began a volume at 02:05 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.1 hours before the alert went out and 216 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: 1342 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1182 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 20 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.

555 
WGUS52 KCAE 100203
FFWCAE
GAC073-181-SCC065-100330-
/O.NEW.KCAE.FF.W.0008.130710T0203Z-130710T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1003 PM EDT TUE JUL 9 2013

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN MCCORMICK COUNTY IN CENTRAL SOUTH CAROLINA...
  NORTHERN COLUMBIA COUNTY IN EAST CENTRAL GEORGIA...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL GEORGIA...

* UNTIL 1130 PM EDT

* AT 1000 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED   FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED 
  AREA. AN ESTIMATED TWO TO THREE INCHES OF RAIN HAS FALLEN WITHIN 
  THE PAST HOUR AND HEAVY RAINFALL WILL CONTINUE. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PLUM BRANCH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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

&&

LAT...LON 3391 8226 3374 8216 3373 8218 3369 8217
      3369 8215 3368 8215 3365 8211 3364 8210
      3365 8239 3387 8242

$$

LM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:59 PM EDT	Areal Flood Advisory	CAE	Edgefield, McCormick	61 min
Jul 10, 1:37 AM EDT	Areal Flood Advisory	CAE	Aiken	113 min
Jul 10, 11:02 AM EDT	River Flood Warning	CAE	Clarendon	6 days
Jul 10, 3:09 PM EDT	Areal Flood Advisory	CAE	McCormick	51 min
Jul 10, 3:37 PM EDT	Areal Flood Advisory	CAE	Lexington, Richland	53 min
Jul 10, 6:37 PM EDT	River Flood Warning	CAE	Greenwood, Newberry, Saluda	44 hr
Jul 10, 8:56 AM EDT	Areal Flood Advisory	CAE	Burke, Richmond	2 hr
Jul 10, 1:50 PM EDT	Areal Flood Advisory	CAE	Columbia, McDuffie, Richmond	55 min
Jul 10, 2:11 PM EDT	Flash Flood Warning	CAE	Columbia, Richmond	94 min

Nearby

Flash Flood Warnings in Georgia, 2013 Flash Flood Warnings in South Carolina, 2013 Every 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.