Alert archive / North Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 9, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Jul 20, 2012, 4:54 PM EDT for Mecklenburg County, North Carolina. It was in force for 3 hr. 3 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
- Jul 20, 2012, 4:54 PM EDT (20:54 UTC)
- Expired
- Jul 20, 2012, 8:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
County Mecklenburg County, NC
The radar
The Greer radar (KGSP), 129 km from the middle of the area, began a volume at 20:54 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 5:00 PM EDT | HEAVY RAIN 3 | 3 S Charlotte, NC | HEAVY RAIN CAUSED A PARTIAL ROOF COLLAPSE AT SOUTH PARK MALL |
| Jul 20, 5:15 PM EDT | FLASH FLOOD | 3 Ese Charlotte, NC | MCMULLEN CREEK OVERTOPPED AND FLOODED ADDISON DRIVE |
| Jul 20, 6:00 PM EDT | FLASH FLOOD | 4 S Charlotte, NC | MCMULLEN CREEK OVERFLOWED AND FLOOD WATERS ENTERED 4 HOUSES ALONG JOHNNY CAKE LANE. TIME ESTIMATED |
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, 8.9 hours before the alert went out and 135 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.
- Mixed-layer CAPE
- 629 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 765 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
926
WGUS52 KGSP 202054
FFWGSP
NCC119-210000-
/O.NEW.KGSP.FF.W.0009.120720T2054Z-120721T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
454 PM EDT FRI JUL 20 2012
THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL MECKLENBURG COUNTY IN THE PIEDMONT OF NORTH
CAROLINA...
* UNTIL 800 PM EDT
* AT 451 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SERIES OF THUNDERSTORMS MOVING EAST ACROSS THE WARNED
AREA...PRODUCING RAINFALL AT RATES IN EXCESS OF 2 INCHES PER HOUR.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
PINEVILLE AND SOUTHPARK MALL. STREAM FLOODING IS LIKELY ALONG
MCMULLEN CREEK...SUGAR CREEK...BRIAR CREEK...MCALPINE CREEK...AND
NEARBY TRIBUTARIES. SERIOUS STREET FLOODING WILL LIKELY ALSO DEVELOP
IN LOW LYING AND POOR DRAINAGE AREAS.
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. 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 3520 8074 3512 8080 3506 8085 3506 8089
3510 8093 3518 8089
$$
HG3 follow-up statements
502
WGUS72 KGSP 202200
FFSGSP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
600 PM EDT FRI JUL 20 2012
NCC119-210000-
/O.CON.KGSP.FF.W.0009.000000T0000Z-120721T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
600 PM EDT FRI JUL 20 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MECKLENBURG COUNTY UNTIL 800 PM EDT...
AT 554 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
RAINFALL RATES TAPERING OFF TO LIGHT TO MODERATE VALUES ACROSS THE
REGION. HOWEVER...RAINFALL AMOUNTS OF 1 TO 3 INCHES HAVE IMPACTED
THE AREA OVER THE PAST THREE HOURS...WITH ISOLATED REPORTS OF NEARLY
4 INCHES WITHIN THE FLASH FLOOD WARNING AREA. IN ADDITION...LOCAL
LAW ENFORCEMENT...FIRE DEPARTMENT...AND MEDIA SOURCES HAVE REPORTED
SEVERE STREET FLOODING ON ADDISON DRIVE AT MCMULLEN CREEK AND ALONG
PARK SOUTH DRIVE.
RUNOFF FROM THIS EXCESSIVE RAINFALL MAY CAUSE ADDITIONAL FLASH
FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH
FLOODING INCLUDE UPPER LITTLE SUGAR CREEK...BRIAR CREEK...LITTLE
SUGAR CREEK...IRWIN CREEK...AND MCALPINE CREEK. DEEP PONDING OF
WATER IN LOW LYING AREAS IS EXPECTED AS WELL.
ADDITIONAL THUNDERSTORMS COULD REDEVELOP FROM THE WEST THROUGH THE
EVENING HOURS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS
WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3520 8074 3512 8080 3506 8085 3506 8089
3510 8093 3518 8089
$$
HG722
WGUS72 KGSP 202325
FFSGSP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
725 PM EDT FRI JUL 20 2012
NCC119-210000-
/O.CON.KGSP.FF.W.0009.000000T0000Z-120721T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
725 PM EDT FRI JUL 20 2012
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
MECKLENBURG COUNTY UNTIL 800 PM EDT...
AT 721 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE BACK EDGE OF LIGHT RAINFALL IS MOVING EAST OF THE FLASH
FLOOD WARNING AREA. STREAM GAGES SHOW THAT WATER LEVELS AROUND THE
AREA HAVE LARGELY CRESTED AND ARE STARTING TO
RECEDE...HOWEVER...ISOLATED FLOODING OF LOW LYING AND POOR DRAINAGE
AREAS MAY LINGER UNTIL 8 PM. UNLESS ANY ADDITIONAL THUNDERSTORMS
AFFECT THE WARNING AREA...THE FLASH FLOOD WARNING WILL LIKELY BE
ALLOWED TO EXPIRE ON SCHEDULE AT 8 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CONTINUE TO CAUSE MINOR
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. TURN AROUND AND FIND ANOTHER ROUTE.
&&
LAT...LON 3520 8074 3512 8080 3506 8085 3506 8089
3510 8093 3518 8089
$$
HG985
WGUS72 KGSP 202355
FFSGSP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
755 PM EDT FRI JUL 20 2012
NCC119-210007-
/O.EXP.KGSP.FF.W.0009.000000T0000Z-120721T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MECKLENBURG NC-
755 PM EDT FRI JUL 20 2012
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTH CENTRAL
MECKLENBURG COUNTY WILL BE ALLOWED TO EXPIRE AT 800 PM EDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS LARGELY ENDED OVER SOUTHERN PARTS
OF THE CHARLOTTE AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE
RECEDED...ENDING THE FLOOD THREAT. ONE EXCEPTION IS THAT MALLARD
CREEK AT HARRISBURG CONTINUES TO SLOWLY RISE...HOWEVER...ADDITIONAL
FLOODING IS NOT LIKELY AT THIS LOCATION. THE FLASH FLOOD WARNING
WILL BE ALLOWED TO EXPIRE ON SCHEDULE AT 8 PM...HOWEVER...STANDING
WATER MAY PERSIST IN THE NORMALLY POOR DRAINAGE LOCATIONS INTO THE
EVENING HOURS.
LAT...LON 3520 8074 3512 8080 3506 8085 3506 8089
3510 8093 3518 8089
$$
HGThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:24 PM EDT | Special Weather Statement | GSP | Alexander, Avery, Burke, Caldwell, McDowell, Mitchell and 1 more | 51 min |
| Jul 19, 8:55 PM EDT | Special Weather Statement | GSP | Buncombe, Haywood, Madison | 65 min |
| Jul 19, 9:04 PM EDT | Special Weather Statement | GSP | Union | 26 min |
| Jul 19, 9:27 PM EDT | Special Weather Statement | GSP | Alexander, Burke, Caldwell, Catawba, Davie, Iredell | 63 min |
| Jul 19, 9:55 PM EDT | Special Weather Statement | GSP | Alexander, Burke, Catawba, Cleveland, Lincoln, McDowell and 2 more | 65 min |
| Jul 19, 10:15 PM EDT | Special Weather Statement | GSP | Graham, Swain | 60 min |
| Jul 19, 10:49 PM EDT | Special Weather Statement | GSP | Buncombe | 26 min |
| Jul 19, 10:54 PM EDT | Special Weather Statement | GSP | Catawba, Cleveland, Gaston, Lincoln, Rutherford | 51 min |
| Jul 19, 11:40 PM EDT | Special Weather Statement | GSP | Henderson | 35 min |
| Jul 20, 3:10 PM EDT | Special Weather Statement | GSP | Union | 35 min |
| Jul 20, 3:29 PM EDT | Special Weather Statement | GSP | Mecklenburg | 31 min |
| Jul 20, 4:20 PM EDT | Special Weather Statement | GSP | Mecklenburg, Union | 25 min |
| Jul 20, 4:32 PM EDT | Areal Flood Advisory | GSP | Mecklenburg | 118 min |
| Jul 20, 4:39 PM EDT | Special Weather Statement | GSP | Mecklenburg | 36 min |
| Jul 20, 5:17 PM EDT | Special Weather Statement | GSP | Cabarrus, Rowan | 28 min |
| Jul 20, 5:39 PM EDT | Special Weather Statement | GSP | Rowan | 36 min |
| Jul 20, 5:42 PM EDT | Severe Thunderstorm Warning | GSP | Davie, Rowan | 48 min |
| Jul 20, 6:37 PM EDT | Special Weather Statement | GSP | Cabarrus, Mecklenburg, Rowan, Union | 53 min |
| Jul 20, 7:46 PM EDT | Special Weather Statement | GSP | Union | 44 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.