Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 27, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 17, 2021, 4:35 PM EDT for 4 counties in North Carolina. It was in force for 8 hr. 1 report 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 17, 2021, 4:35 PM EDT (20:35 UTC)
- Expired
- Aug 18, 2021, 12:56 AM EDT
- In force
- 8 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
Counties Buncombe County, NC, Henderson County, NC, Polk County, NC, Rutherford County, NC
The radar
The Greer radar (KGSP), 50 km from the middle of the area, began a volume at 20:37 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 17, 5:34 PM EDT | FLASH FLOOD | Bat Cave, NC | SWIFT FLOODWATERS ENCROACHING ON HOMES |
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, 8.6 hours before the alert went out and 232 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
- 522 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted.
063
WGUS52 KGSP 172035
FFWGSP
NCC021-089-149-161-180030-
/O.NEW.KGSP.FF.W.0027.210817T2035Z-210818T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
435 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Southeastern Buncombe County in western North Carolina...
Eastern Henderson County in western North Carolina...
Northwestern Polk County in western North Carolina...
Northwestern Rutherford County in western North Carolina...
* Until 830 PM EDT.
* At 435 PM EDT, As the threat of tropical-like thunderstorms
continues across the headwaters of the Green and Broad Rivers into
this evening, locally as much as 5 on 6 inches of rain may
accumulate. This will result in fast river and stream rises
throughout the warned area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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...
Flat Rock, Lake Lure, Saluda, Chimney Rock Village, Chimney Rock
State Park, Bat Cave, Dupont State Forest, Lake Adger, Edneyville,
Dana, Gerton, Mill Spring, East Flat Rock, Tuxedo, Shingle Hollow
and Crab Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3518 8244 3517 8255 3519 8257 3542 8231
3546 8236 3558 8229 3551 8217 3553 8200
3541 8207 3536 8212 3532 8213 3529 8223
3525 8227 3521 8234 3523 8236 3522 8239
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$3 follow-up statements
959
WGUS52 KGSP 172328
FFWGSP
NCC021-089-149-161-180130-
/O.EXT.KGSP.FF.W.0027.000000T0000Z-210818T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
728 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has extended
the
* Flash Flood Warning for...
Southeastern Buncombe County in western North Carolina...
Eastern Henderson County in western North Carolina...
Northwestern Polk County in western North Carolina...
Northwestern Rutherford County in western North Carolina...
* Until 930 PM EDT.
* At 728 PM EDT, As the threat of tropical-like thunderstorms
continues across the headwaters of the Green and Broad Rivers into
this evening, locally as much as 5 on 6 inches of rain may
accumulate. This will result in fast river and stream rises
throughout the warned area.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Hendersonville, Flat Rock, Lake Lure, Saluda, Chimney Rock
Village, Chimney Rock State Park, Bat Cave, Dupont State Forest,
Lake Adger, Edneyville, Dana, Gerton, Mill Spring, East Flat Rock,
Tuxedo, Shingle Hollow and Crab Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3518 8244 3517 8255 3519 8257 3542 8231
3546 8236 3558 8229 3551 8217 3553 8200
3541 8207 3536 8212 3532 8213 3529 8223
3525 8227 3521 8234 3523 8236 3522 8239
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$366
WGUS52 KGSP 180122
FFWGSP
NCC021-089-149-161-180645-
/O.EXT.KGSP.FF.W.0027.000000T0000Z-210818T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
922 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has extended
the
* Flash Flood Warning for...
Southeastern Buncombe County in western North Carolina...
Eastern Henderson County in western North Carolina...
Northwestern Polk County in western North Carolina...
Northwestern Rutherford County in western North Carolina...
* Until 245 AM EDT.
* At 922 PM EDT, Heavy rainfall has ended across the region but
flash flooding is still ongoing. The most significant impacts are
occurring along the Rocky Broad River above Lake Lure, where the
floodwave is currently cresting. However, it will take several
hours for excessive runoff to subside and for all area streams to
crest and recede. Therefore, please do NOT let your guard down
and avoid all low-lying areas adjacent to streams. Do NOT cross
flooded roadways as those roadways may have been damaged by swift
currents. Avoid all low-water crossings as flood waters can rise
quickly and without warning.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that may continue to experience flooding include...
Hendersonville, Flat Rock, Lake Lure, Saluda, Chimney Rock
Village, Chimney Rock State Park, Bat Cave, Dupont State Forest,
Lake Adger, Edneyville, Dana, Gerton, Mill Spring, East Flat Rock,
Tuxedo, Shingle Hollow and Crab Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rain is increasing the risk of landslides, especially in areas
where slides have occurred in the past. Be especially alert if you
are near a stream, especially at the base of a mountain or in a
cove. Watch for loose-moving soil and rocks or a sudden increase in
streamflow. Leave the area quickly if this is observed. When driving
along roads where the terrain is steep or rocky, watch and listen
for falling rocks, mud, trees and other debris.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3518 8244 3517 8255 3519 8257 3542 8231
3546 8236 3558 8229 3551 8217 3553 8200
3541 8207 3536 8212 3532 8213 3529 8223
3525 8227 3521 8234 3523 8236 3522 8239
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JMP784
WGUS72 KGSP 180456
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1256 AM EDT Wed Aug 18 2021
NCC021-089-149-161-180506-
/O.CAN.KGSP.FF.W.0027.000000T0000Z-210818T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Buncombe NC-Henderson NC-Polk NC-Rutherford NC-
1256 AM EDT Wed Aug 18 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN BUNCOMBE,
EASTERN HENDERSON, NORTHWESTERN POLK AND NORTHWESTERN RUTHERFORD
COUNTIES...
The heavy rain has ended and area streams have crested and receded
back below bankfull levels. Therefore, the Flash Flood Warning will
be discontinued. Please continue to heed all barricades and
evacuation orders which remain in place to ensure areas and roadways
are safe to return to.
LAT...LON 3518 8244 3517 8255 3519 8257 3542 8231
3546 8236 3558 8229 3551 8217 3553 8200
3541 8207 3536 8212 3532 8213 3529 8223
3525 8227 3521 8234 3523 8236 3522 8239
$$
JMPThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 2:22 AM EDT | River Flood Warning | GSP | Henderson, Transylvania | 4 days |
| Aug 17, 3:01 AM EDT | River Flood Advisory | GSP | Buncombe, Henderson | 79 min |
| Aug 17, 3:27 AM EDT | River Flood Advisory | GSP | Buncombe | 26 hr |
| Aug 17, 3:59 AM EDT | River Flood Warning | GSP | Madison | 40 hr |
| Aug 17, 4:12 AM EDT | River Flood Warning | GSP | Buncombe | 31 hr |
| Aug 17, 4:20 AM EDT | River Flood Warning | GSP | Buncombe, Henderson | 4 days |
| Aug 17, 11:36 AM EDT | Tornado Warning | GSP | Alexander, Iredell | 39 min |
| Aug 17, 12:05 PM EDT | Special Weather Statement | GSP | Iredell | 25 min |
| Aug 17, 12:06 PM EDT | Tornado Warning | GSP | Iredell | 39 min |
| Aug 17, 12:33 PM EDT | Tornado Warning | GSP | Alexander | 12 min |
| Aug 17, 12:42 PM EDT | Tornado Warning | GSP | Iredell | 18 min |
| Aug 17, 1:09 PM EDT | Flash Flood Warning | GSP | Jackson, Macon, Transylvania | 5 hr |
| Aug 17, 1:25 PM EDT | Flash Flood Warning | GSP | Transylvania | 4 hr |
| Aug 17, 1:56 PM EDT | Special Weather Statement | GSP | Transylvania | 34 min |
| Aug 17, 2:01 PM EDT | Special Weather Statement | GSP | Catawba, Lincoln | 29 min |
| Aug 17, 2:02 PM EDT | Special Weather Statement | GSP | Iredell | 28 min |
| Aug 17, 2:02 PM EDT | Special Weather Statement | GSP | Alexander | 28 min |
| Aug 17, 2:31 PM EDT | Tornado Warning | GSP | Burke, Caldwell | 44 min |
| Aug 17, 2:31 PM EDT | Tornado Warning | GSP | Macon | 19 min |
| Aug 17, 3:02 PM EDT | Tornado Warning | GSP | Caldwell | 43 min |
| Aug 17, 3:06 PM EDT | Tornado Warning | GSP | Alexander, Caldwell | 39 min |
| Aug 17, 3:12 PM EDT | Flash Flood Warning | GSP | Haywood | 3 hr |
| Aug 17, 3:41 PM EDT | Flash Flood Warning | GSP | Buncombe | 5 hr |
| Aug 17, 3:48 PM EDT | Tornado Warning | GSP | Alexander, Burke, Caldwell, Catawba | 42 min |
| Aug 17, 4:07 PM EDT | Tornado Warning | GSP | Avery, Burke, McDowell, Mitchell | 53 min |
| Aug 17, 4:08 PM EDT | Flash Flood Warning | GSP | Madison | 9 hr |
| Aug 17, 4:16 PM EDT | Flash Flood Warning | GSP | Buncombe, Henderson | 5 hr |
| Aug 17, 4:17 PM EDT | Tornado Warning | GSP | Avery, Burke, Caldwell | 43 min |
| Aug 17, 4:20 PM EDT | Tornado Warning | GSP | Henderson, Polk, Rutherford | 12 min |
| Aug 17, 4:24 PM EDT | Flash Flood Warning | GSP | Haywood | 4 hr |
| Aug 17, 4:50 PM EDT | Flash Flood Warning | GSP | McDowell | 9 hr |
| Aug 17, 4:58 PM EDT | Flash Flood Warning | GSP | Yancey | 4 hr |
| Aug 17, 4:59 PM EDT | Tornado Warning | GSP | Avery, Burke, McDowell, Mitchell, Yancey | 46 min |
| Aug 17, 5:14 PM EDT | Flash Flood Warning | GSP | Transylvania | 4 hr |
| Aug 17, 5:17 PM EDT | River Flood Warning | GSP | Haywood | 12 hr |
| Aug 17, 5:26 PM EDT | Tornado Warning | GSP | Avery, McDowell, Mitchell, Rutherford, Yancey | 49 min |
| Aug 17, 5:28 PM EDT | Tornado Warning | GSP | Avery, Burke, Caldwell | 47 min |
| Aug 17, 5:32 PM EDT | Flash Flood Warning | GSP | Mitchell | 4 hr |
| Aug 17, 5:48 PM EDT | River Flood Warning | GSP | Buncombe | 26 hr |
| Aug 17, 6:00 PM EDT | Flash Flood Warning | GSP | Avery, Burke, Caldwell | 9 hr |
| Aug 17, 6:16 PM EDT | Flash Flood Warning | GSP | Henderson, Polk, Rutherford | 3 hr |
| Aug 17, 6:42 PM EDT | Tornado Warning | GSP | Polk, Rutherford | 48 min |
| Aug 17, 6:57 PM EDT | Flash Flood Warning | GSP | Burke, McDowell | 6 hr |
| Aug 17, 7:59 PM EDT | Tornado Warning | GSP | Cleveland | 46 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.