Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 13, NWS Greenville-Spartanburg, SC

August 2, 2012Catawba County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 2, 2012, 3:04 AM EDT for Catawba County, North Carolina. It was in force for 70 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
Aug 2, 2012, 3:04 AM EDT (07:04 UTC)
Expired
Aug 2, 2012, 4:14 AM EDT
In force
70 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County Catawba County, NC

The radar

The Greer radar (KGSP), 133 km from the middle of the area, began a volume at 07:05 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.1 hours before the alert went out and 122 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, Greensboro/Hi Pt, NC at 00:00Z on 2012-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 737 joules per kilogram.LCLLFCEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 2012-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 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
737 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1975 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
29 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.

260 
WGUS52 KGSP 020704
FFWGSP
NCC035-021000-
/O.NEW.KGSP.FF.W.0013.120802T0704Z-120802T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
304 AM EDT THU AUG 2 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CATAWBA COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 600 AM EDT

* AT 302 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
SLOWLY MOVING AND BACKBUILDING THUNDERSTORMS WITH VERY HEAVY 
RAINFALL ACROSS CENTRAL CATAWBA COUNTY. RADAR ESTIMATES THAT IN 
EXCESS OF 3 INCHES OF RAIN HAS FALLEN OVER THE PAST COUPLE OF 
HOURS...AND AN ADDITIONAL INCH OR TWO IS POSSIBLE THROUGH 4 AM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO  
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...  
NEWTON...CLAREMONT...AND CONOVER.

FLOODING IS ESPECIALLY LIKELY ALONG LYLE CREEK...MULLER CREEK...AND 
MILLER BRANCH. SERIOUS FLOODING OF LOW LYING AND POOR DRAINAGE AREAS 
WILL ALSO OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. TURN AROUND AND FIND ANOTHER ROUTE.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES OR OTHER
SEVERE WEATHER THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL
FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3578 8112 3574 8109 3567 8109 3565 8117
      3567 8127 3573 8130 3576 8127

$$

HG
1 follow-up statement
778 
WGUS72 KGSP 020814
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
414 AM EDT THU AUG 2 2012

NCC035-020829-
/O.CAN.KGSP.FF.W.0013.000000T0000Z-120802T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CATAWBA NC-
414 AM EDT THU AUG 2 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL CATAWBA
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 3578 8112 3574 8109 3567 8109 3565 8117
      3567 8127 3573 8130 3576 8127

$$

HG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 10:34 PM EDTSpecial Weather StatementGSPGraham41 min
Aug 2, 1:15 AM EDTSpecial Weather StatementGSPAlexander45 min
Aug 2, 1:25 AM EDTSevere Thunderstorm WarningGSPAlexander, Caldwell, Catawba, Iredell65 min
Aug 2, 1:54 AM EDTSevere Thunderstorm WarningGSPCatawba, Iredell, Rowan66 min
Aug 2, 2:12 AM EDTAreal Flood AdvisoryGSPAlexander80 min
Aug 2, 2:33 AM EDTAreal Flood AdvisoryGSPCatawba91 min
Aug 2, 2:48 AM EDTSpecial Weather StatementGSPCabarrus, Lincoln, Rowan72 min
Aug 2, 3:07 AM EDTSpecial Weather StatementGSPCatawba23 min
Aug 2, 1:11 PM EDTSpecial Weather StatementGSPMcDowell49 min
Aug 2, 1:48 PM EDTSevere Thunderstorm WarningGSPBurke, McDowell57 min
Aug 2, 1:52 PM EDTSpecial Weather StatementGSPCleveland23 min
Aug 2, 2:30 PM EDTSevere Thunderstorm WarningGSPMcDowell, Rutherford60 min
Aug 2, 3:10 PM EDTSevere Thunderstorm WarningGSPBuncombe, Henderson, Transylvania65 min
Aug 2, 3:13 PM EDTSpecial Weather StatementGSPTransylvania47 min
Aug 2, 3:28 PM EDTSpecial Weather StatementGSPTransylvania47 min
Aug 2, 5:51 PM EDTSpecial Weather StatementGSPUnion39 min
Aug 2, 6:00 PM EDTSevere Thunderstorm WarningGSPUnion60 min
Aug 2, 6:37 PM EDTSpecial Weather StatementGSPCabarrus38 min
Aug 2, 7:04 PM EDTAreal Flood AdvisoryGSPCabarrus, Mecklenburg116 min
Aug 2, 7:06 PM EDTSpecial Weather StatementGSPUnion39 min
Aug 2, 7:19 PM EDTSevere Thunderstorm WarningGSPMecklenburg, Union56 min
Aug 2, 7:48 PM EDTSevere Thunderstorm WarningGSPMecklenburg19 min

Nearby

Flash 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.