Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 17, NWS Greenville-Spartanburg, SC

August 7, 2012Mecklenburg County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 7, 2012, 7:43 PM EDT for Mecklenburg County, North Carolina. It was in force for 4 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 7, 2012, 7:43 PM EDT (23:43 UTC)
Expired
Aug 7, 2012, 11:15 PM EDT
In force
4 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County Mecklenburg County, NC

The radar

The Greer radar (KGSP), 130 km from the middle of the area, began a volume at 23:45 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.

What was reported inside it

TimeReportWhereRemark
Aug 7, 8:06 PM EDTFLASH FLOOD1 W Charlotte, NCTWO SWIFT WATER RESCUES OCCURRED ON CHARLOTTES WEST SIDE. ONE RESCUE WAS AT A LOW POINT IN THE ROAD NEAR THE INTERSECTION OF ASHLEY ROAD AND WILKINSON BLVD. THE OTHER RESCUE OCCURRED DUE TO A CLOGGED UP STORM DRAIN NEAR THE INTERSECTION OF WESLEY VILLAGE AND F
Aug 7, 8:10 PM EDTFLASH FLOODPineville, NCA FEW BACK ROADS CLOSED AROUND PINEVILLE DUE TO HIGH WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.7 hours before the alert went out and 134 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 12:00Z on 2012-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 984 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 12:00Z on 2012-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
984 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
5 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.

160 
WGUS52 KGSP 072343
FFWGSP
NCC119-080530-
/O.NEW.KGSP.FF.W.0017.120807T2343Z-120808T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
743 PM EDT TUE AUG 7 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MECKLENBURG COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 130 AM EDT

* AT 741 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CENTER CITY CHARLOTTE...UNC CHARLOTTE...EASTLAND MALL...I-77 AT
  I-85...MATTHEWS...MINT HILL...PAW CREEK...PINEVILLE AND SOUTHPARK
  MALL.

RAINFALL OF OVER TWO INCHES HAS BEEN MEASURED AT PARK SOUTH DRIVE IN 
SOUTH CHARLOTTE.

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.

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...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 3503 8077 3503 8080 3500 8084 3511 8094
      3508 8098 3510 8101 3521 8099 3530 8096
      3534 8069 3527 8066 3521 8055

$$

07
3 follow-up statements
472 
WGUS72 KGSP 080052
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
852 PM EDT TUE AUG 7 2012

NCC119-080530-
/O.CON.KGSP.FF.W.0017.000000T0000Z-120808T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
852 PM EDT TUE AUG 7 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MECKLENBURG
COUNTY UNTIL 130 AM EDT...

AT 849 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE MOVING OUT OF THE 
WARNED AREA. RAINFALL AMOUNTS OF AROUND THREE INCHES HAVE BEEN 
ESTIMATED IN THIS AREA. STREAM AND CREEK LEVELS WERE STILL RISING.

RUNOFF FROM EARLIER EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...CENTER CITY CHARLOTTE...I-77 AT I-85...PINEVILLE AND 
SOUTHPARK MALL.

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.

A FLASH FLOOD WARNING MEANS THAT FLASH 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.

&&

LAT...LON 3503 8077 3503 8080 3500 8084 3511 8094
      3508 8098 3510 8101 3521 8099 3530 8096
      3534 8069 3527 8066 3521 8055

$$

07
836 
WGUS72 KGSP 080217
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1017 PM EDT TUE AUG 7 2012

NCC119-080530-
/O.CON.KGSP.FF.W.0017.000000T0000Z-120808T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
1017 PM EDT TUE AUG 7 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MECKLENBURG
COUNTY UNTIL 130 AM EDT...

AT 1012 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THUNDERSTORMS WITH VERY HEAVY RAINFALL HAD MOVED OUT OF THE 
WARNED AREA. EARLIER THIS EVENING...THUNDERSTORMS PRODUCED AROUND 
THREE INCHES OF RAIN IN SOUTHERN MECKLENBURG COUNTY.

ALTHOUGH STREAM AND CREEK LEVELS ARE SUBSIDING...WATER LEVELS WILL 
REMAIN HIGH LATE THIS EVENING. SOME LOCATIONS THAT WILL EXPERIENCE 
FLASH FLOODING INCLUDE...CENTER CITY CHARLOTTE...I-77 AT I-85... 
PINEVILLE AND SOUTHPARK MALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR 
OCCURRING. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS 
OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE.

&&

LAT...LON 3503 8077 3503 8080 3500 8084 3511 8094
      3508 8098 3510 8101 3521 8099 3530 8096
      3534 8069 3527 8066 3521 8055

$$

07
342 
WGUS72 KGSP 080315
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1115 PM EDT TUE AUG 7 2012

NCC119-080328-
/O.CAN.KGSP.FF.W.0017.000000T0000Z-120808T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
1115 PM EDT TUE AUG 7 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN
MECKLENBURG COUNTY IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. MOST 
STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING 
TO RECEDE...ENDING THE FLOOD THREAT. THE FEW STREAMS AND CREEKS THAT 
WERE STILL RISING ARE NOT EXPECTED TO REACH FLOOD STAGE. IF FLOODING 
HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT 
AGENCY.

LAT...LON 3503 8077 3503 8080 3500 8084 3511 8094
      3508 8098 3510 8101 3521 8099 3530 8096
      3534 8069 3527 8066 3521 8055

$$
07

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 8:10 PM EDTAreal Flood AdvisoryGSPCabarrus, Mecklenburg110 min
Aug 6, 8:46 PM EDTFlash Flood WarningGSPCabarrus, Mecklenburg119 min
Aug 7, 6:12 PM EDTSpecial Weather StatementGSPCaldwell48 min
Aug 7, 6:30 PM EDTSpecial Weather StatementGSPMecklenburg45 min
Aug 7, 7:23 PM EDTSpecial Weather StatementGSPMecklenburg52 min
Aug 7, 7:32 PM EDTAreal Flood AdvisoryGSPMecklenburg118 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.