Alert archive / South Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 33, NWS Greenville-Spartanburg, SC

October 2, 2012Anderson County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Oct 2, 2012, 6:05 AM EDT for Anderson County, South Carolina. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 2, 2012, 6:05 AM EDT (10:05 UTC)
Expired: Oct 2, 2012, 8:19 AM EDT
In force: 2 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

County Anderson County, SC

The radar

The Greer radar (KGSP), 51 km from the middle of the area, began a volume at 10:05 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, 10.1 hours before the alert went out and 219 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: 988 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

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

241 
WGUS52 KGSP 021005
FFWGSP
SCC007-021300-
/O.NEW.KGSP.FF.W.0033.121002T1005Z-121002T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
605 AM EDT TUE OCT 2 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL ANDERSON COUNTY IN UPSTATE SOUTH CAROLINA...

* UNTIL 900 AM EDT

* AT 603 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS WITH VERY HEAVY RAINFALL IN EXCESS OF 2 INCHES ACROSS 
THE WARNED AREA. LAW ENFORCEMENT ALSO REPORTED FLOODING IN SOME 
PARTS OF THE CITY OF ANDERSON...PARTICULARLY NEAR HIGHWAY 81.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ANDERSON.


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.

TO REPORT HIGH WATER...FLOODING...OR OTHER SEVERE WEATHER...CALL 
TOLL FREE... 1...800...2 6 7...8 1 0 1...AND LEAVE A MESSAGE 
EXPLAINING THE EVENT AND THE APPROXIMATE ADDRESS WHERE IT OCCURRED.

&&

LAT...LON 3455 8259 3442 8259 3443 8269 3457 8272
      3470 8256 3467 8253

$$
WIMBERLEY

1 follow-up statement

554 
WGUS72 KGSP 021219
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
819 AM EDT TUE OCT 2 2012

SCC007-021234-
/O.CAN.KGSP.FF.W.0033.000000T0000Z-121002T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ANDERSON SC-
819 AM EDT TUE OCT 2 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL ANDERSON
COUNTY IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3455 8259 3442 8259 3443 8269 3457 8272
      3470 8256 3467 8253

$$

MCAVOY

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 2, 4:59 AM EDT	Areal Flood Advisory	GSP	Anderson	3 hr
Oct 2, 5:43 AM EDT	Areal Flood Advisory	GSP	Greenville, Pickens	56 min
Oct 2, 6:13 AM EDT	Special Weather Statement	GSP	Greenville	47 min
Oct 2, 6:23 AM EDT	Areal Flood Advisory	GSP	Anderson, Greenville, Pickens	2 hr
Oct 2, 6:32 AM EDT	Flash Flood Warning	GSP	Greenville, Pickens	3 hr
Oct 2, 7:47 AM EDT	Special Weather Statement	GSP	Greenville	28 min
Oct 2, 7:59 AM EDT	Special Weather Statement	GSP	Laurens	31 min
Oct 2, 8:00 AM EDT	Areal Flood Advisory	GSP	Greenville	3 hr
Oct 2, 8:25 AM EDT	Special Weather Statement	GSP	Spartanburg	35 min
Oct 2, 9:00 AM EDT	Special Weather Statement	GSP	Cherokee, Union	45 min
Oct 2, 9:17 AM EDT	Tornado Warning	GSP	Cherokee	43 min
Oct 2, 10:45 AM EDT	Special Weather Statement	GSP	York	45 min
Oct 2, 6:56 PM EDT	Areal Flood Advisory	GSP	Anderson, Greenville, Pickens	6 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.