Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 8, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 11, 2021, 8:27 PM EDT for Mecklenburg County, North Carolina. It was in force for 3 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 11, 2021, 8:27 PM EDT (00:27 UTC)
- Expired
- Aug 11, 2021, 11:13 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), 130 km from the middle of the area, began a volume at 00:29 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 |
|---|---|---|---|
| Aug 11, 8:32 PM EDT | FLASH FLOOD | 3 Nnw Charlotte, NC | BROADCAST MEDIA REPORTED WEST MOREHEAD STREET BECOMING IMPASSABLE NEAR IRWIN CREEK. |
| Aug 11, 8:35 PM EDT | FLASH FLOOD | Charlotte, NC | OFFICIAL NWS OBS REPORTED LITTLE SUGAR CREEK AT MEDICAL CENTER #6510 WENT ABOVE FLOOD STAGE AT 8:35PM. |
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 00:00Z, 0.5 hours before the alert went out and 131 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
- 405 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1623 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
644
WGUS52 KGSP 120027
FFWGSP
NCC119-120330-
/O.NEW.KGSP.FF.W.0008.210812T0027Z-210812T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
827 PM EDT Wed Aug 11 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Southern Mecklenburg County in the piedmont of North Carolina...
* Until 1130 PM EDT.
* At 827 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen, with isolated higher amounts. Additional rainfall
amounts of 1 to 2 inches are possible in the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Uptown Charlotte, Central Charlotte, South Charlotte, East
Charlotte, Southwest Charlotte, Northeast Charlotte, Northwest
Charlotte, Matthews, Mint Hill, Pineville, Freedom Park, Southpark
Mall, The Plaza, The Arboretum, Hidden Valley, Charlotte Douglas
Airport, Reedy Creek Park, Paw Creek and Carowinds.
This includes the following streams and drainages...
McAlpine Creek, Little Sugar Creek, Briar Creek, Doby Creek, Irwin
Creek, and any small branches and tributaries that feed into these
creeks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
When it is safe to do so, please report flooding or landslides
threatening roads or property to the National Weather Service
Greenville-Spartanburg by calling toll free, 1, 800, 2 6 7, 8 1 0 1,
by posting on our Facebook page, or via Twitter using hashtag
NWSGSP. Your message should describe the specific location where
impacts occurred and the depth of flooding observed.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3509 8098 3510 8099 3521 8098 3524 8095
3528 8091 3531 8089 3532 8084 3532 8081
3531 8078 3529 8077 3528 8072 3524 8073
3522 8069 3517 8064 3510 8071 3508 8073
3506 8081 3503 8086 3508 8090 3511 8093
FLASH FLOOD...RADAR INDICATED
$$
TDP2 follow-up statements
121
WGUS72 KGSP 120138
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
938 PM EDT Wed Aug 11 2021
NCC119-120330-
/O.CON.KGSP.FF.W.0008.000000T0000Z-210812T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mecklenburg NC-
938 PM EDT Wed Aug 11 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS
EVENING FOR SOUTHERN MECKLENBURG COUNTY...
At 938 PM EDT, Between 2 and 4 inches of rain have fallen across the
Greater Charlotte area this evening. While the heavy rain has ended
across the Greater Charlotte area, some creeks are still rising.
Creeks in Charlotte should be cresting soon, but creeks on the
southern end of Mecklenburg county will still be rising over the
next hour or two.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Uptown Charlotte, Central Charlotte, South Charlotte, East
Charlotte, Southwest Charlotte, Northeast Charlotte, Northwest
Charlotte, Matthews, Mint Hill, Pineville, Freedom Park, Southpark
Mall, The Plaza, The Arboretum, Hidden Valley, Charlotte Douglas
Airport, Reedy Creek Park, Paw Creek and Carowinds.
This includes the following streams and drainages...
Little Sugar Creek, Doby Creek, McAlpine Creek, Irwin Creek, Briar
Creek, and the various branches and streams that feed into these
creeks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
When it is safe to do so, please report flooding or landslides
threatening roads or property to the National Weather Service
Greenville-Spartanburg by calling toll free, 1, 800, 2 6 7, 8 1 0 1,
by posting on our Facebook page, or via Twitter using hashtag
NWSGSP. Your message should describe the specific location where
impacts occurred and the depth of flooding observed.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3509 8098 3510 8099 3521 8098 3524 8095
3528 8091 3531 8089 3532 8084 3532 8081
3531 8078 3529 8077 3528 8072 3524 8073
3522 8069 3517 8064 3510 8071 3508 8073
3506 8081 3503 8086 3508 8090 3511 8093
FLASH FLOOD...RADAR INDICATED
$$
TDP743
WGUS72 KGSP 120313
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1113 PM EDT Wed Aug 11 2021
NCC119-120323-
/O.CAN.KGSP.FF.W.0008.000000T0000Z-210812T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mecklenburg NC-
1113 PM EDT Wed Aug 11 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN MECKLENBURG
COUNTY...
Flood waters are receding and the heavy rain has ended. Flooding is
no longer expected to pose a threat. Please continue to heed
remaining road closures.
LAT...LON 3509 8098 3510 8099 3521 8098 3524 8095
3528 8091 3531 8089 3532 8084 3532 8081
3531 8078 3529 8077 3528 8072 3524 8073
3522 8069 3517 8064 3510 8071 3508 8073
3506 8081 3503 8086 3508 8090 3511 8093
$$
ARKThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 8:09 PM EDT | Special Weather Statement | GSP | Graham | 36 min |
| Aug 12, 1:34 PM EDT | Special Weather Statement | GSP | Jackson | 26 min |
| Aug 12, 2:46 PM EDT | Special Weather Statement | GSP | Caldwell | 44 min |
| Aug 12, 2:48 PM EDT | Special Weather Statement | GSP | Transylvania | 27 min |
| Aug 12, 3:23 PM EDT | Special Weather Statement | GSP | Transylvania | 37 min |
| Aug 12, 3:45 PM EDT | Special Weather Statement | GSP | Caldwell | 30 min |
| Aug 12, 3:47 PM EDT | Special Weather Statement | GSP | Alexander | 28 min |
| Aug 12, 4:10 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Burke, Caldwell, Catawba | 50 min |
| Aug 12, 4:13 PM EDT | Special Weather Statement | GSP | Iredell | 32 min |
| Aug 12, 4:26 PM EDT | Special Weather Statement | GSP | Rutherford | 34 min |
| Aug 12, 4:55 PM EDT | Special Weather Statement | GSP | Rowan | 35 min |
| Aug 12, 5:06 PM EDT | Severe Thunderstorm Warning | GSP | Iredell, Rowan | 23 min |
| Aug 12, 5:18 PM EDT | Special Weather Statement | GSP | Burke | 27 min |
| Aug 12, 5:30 PM EDT | Special Weather Statement | GSP | Davie, Rowan | 30 min |
| Aug 12, 6:12 PM EDT | Special Weather Statement | GSP | Polk | 33 min |
Nearby
Flash Flood Warnings in North Carolina, 2021Every flash flood warning in 2021
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.