Alert archive / South Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 34, NWS Greenville-Spartanburg, SC

October 2, 2012Greenville County, Pickens County, South Carolina; Henderson County, Transylvania County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Oct 2, 2012, 6:32 AM EDT for Greenville County, Pickens County, South Carolina; Henderson County, Transylvania County, North Carolina. It was in force for 3 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, 6:32 AM EDT (10:32 UTC)
Expired
Oct 2, 2012, 9:30 AM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Henderson County, NC, Transylvania County, NC, Greenville County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 37 km from the middle of the area, began a volume at 10:35 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, 10.5 hours before the alert went out and 255 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, Peachtre/Fal Fld, GA at 00:00Z on 2012-10-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 988 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, Peachtre/Fal Fld, GA at 00:00Z on 2012-10-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 263 square meters per square second.19395878Sfc1 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
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.

843 
WGUS52 KGSP 021032
FFWGSP
NCC089-175-SCC045-077-021330-
/O.NEW.KGSP.FF.W.0034.121002T1032Z-121002T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PICKENS COUNTY IN UPSTATE SOUTH CAROLINA...
  NORTHWESTERN GREENVILLE COUNTY IN UPSTATE SOUTH CAROLINA...
  SOUTH CENTRAL HENDERSON COUNTY IN WESTERN NORTH CAROLINA...
  SOUTHEASTERN TRANSYLVANIA COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 930 AM EDT

* AT 631 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
A SERIES OF THUNDERSTORMS WITH VERY HEAVY RAINFALL MOVING ACROSS THE 
WARNED AREA. 2 INCHES OF RAIN OR MORE HAVE FALLEN IN THE WARNED AREA 
SINCE MONDAY AND AREA RIVERS WILL CONTINUE TO RISE FOR SOME TIME.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CAESARS HEAD...FURMAN UNIVERSITY...JONES GAP STATE PARK...   
MARIETTA...TABLE ROCK RESERVOIR AND TRAVELERS REST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES 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 3479 8254 3502 8276 3507 8276 3511 8271
      3526 8267 3528 8255 3518 8245 3497 8242
      3484 8243

$$
WIMBERLEY
1 follow-up statement
287 
WGUS72 KGSP 021251
FFSGSP

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

NCC089-175-SCC045-077-021330-
/O.CON.KGSP.FF.W.0034.000000T0000Z-121002T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENDERSON NC-TRANSYLVANIA NC-GREENVILLE SC-PICKENS SC-
851 AM EDT TUE OCT 2 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN PICKENS...
NORTHWESTERN GREENVILLE...EAST CENTRAL TRANSYLVANIA AND SOUTH CENTRAL
HENDERSON COUNTIES UNTIL 930 AM EDT...

AT 847 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT MODERATE TO HEAVY RAIN HAD MOVED BACK INTO THE WARNED AREA. 

SO FAR COUNTY OFFICIALS HAVE NOT REPORTED ANY FLOODING IN WESTERN 
GREENVILLE...EASTERN PICKENS OR SOUTHWEST HENDERSON COUNTIES. 
HOWEVER...THE ADDITIONAL HEAVY RAIN MAY CAUSE SOME CREEKS TO BRIEFLY 
LEAVE THEIR BANKS AND THE WARNING WILL BE ALLOWED TO RUN THROUGH 930 
AM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES 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 3479 8254 3502 8276 3507 8276 3511 8271
      3526 8267 3528 8255 3518 8245 3497 8242
      3484 8243

$$

MCAVOY

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 2, 4:59 AM EDTAreal Flood AdvisoryGSPAnderson3 hr
Oct 2, 5:43 AM EDTAreal Flood AdvisoryGSPGreenville, Pickens56 min
Oct 2, 6:05 AM EDTFlash Flood WarningGSPAnderson2 hr
Oct 2, 6:13 AM EDTSpecial Weather StatementGSPGreenville47 min
Oct 2, 6:23 AM EDTAreal Flood AdvisoryGSPAnderson, Greenville, Pickens2 hr
Oct 2, 7:47 AM EDTSpecial Weather StatementGSPGreenville28 min
Oct 2, 7:59 AM EDTSpecial Weather StatementGSPLaurens31 min
Oct 2, 8:00 AM EDTAreal Flood AdvisoryGSPGreenville3 hr
Oct 2, 8:25 AM EDTSpecial Weather StatementGSPSpartanburg35 min
Oct 2, 9:00 AM EDTSpecial Weather StatementGSPCherokee, Union45 min
Oct 2, 9:17 AM EDTTornado WarningGSPCherokee43 min
Oct 2, 10:45 AM EDTSpecial Weather StatementGSPYork45 min
Oct 2, 6:56 PM EDTAreal Flood AdvisoryGSPAnderson, Greenville, Pickens6 hr
Oct 2, 3:39 AM EDTAreal Flood AdvisoryGSPMacon111 min
Oct 2, 10:04 AM EDTSpecial Weather StatementGSPGaston, Lincoln41 min
Oct 2, 10:59 AM EDTTornado WarningGSPCatawba, Iredell, Lincoln31 min
Oct 2, 11:15 AM EDTAreal Flood AdvisoryGSPHenderson, Transylvania8 hr

Nearby

Flash Flood Warnings in South Carolina, 2012Flash Flood Warnings in North Carolina, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.