Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 28, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 17, 2021, 4:50 PM EDT for McDowell County, North Carolina. It was in force for 9 hr. 4 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 17, 2021, 4:50 PM EDT (20:50 UTC)
- Expired
- Aug 18, 2021, 1:21 AM EDT
- In force
- 9 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
County McDowell County, NC
The radar
The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 20:49 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, 6:25 PM EDT | FLASH FLOOD | 1 Wnw Old Fort, NC | FLASH FLOODING UNDERWAY ON MILL CREEK NEAR SIMMONS ROAD |
| Aug 17, 7:39 PM EDT | FLASH FLOOD | 5 Ssw Old Fort, NC | FLASH FLOODING ALONG CROOKED CREEK NEAR MURPHYS DRIVE |
| Aug 17, 8:20 PM EDT | FLASH FLOOD | 1 Ne Woodlawn, NC | FLASH FLOODING ONSET NEAR AMERICAN THREAD ROAD |
| Aug 17, 8:37 PM EDT | FLASH FLOOD | 2 N Woodlawn, NC | FLASH FLOODING IN PROGRESS ON COX CREEK |
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, 8.8 hours before the alert went out and 202 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.
565
WGUS52 KGSP 172050
FFWGSP
NCC111-180045-
/O.NEW.KGSP.FF.W.0028.210817T2050Z-210818T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
450 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Central McDowell County in western North Carolina...
* Until 845 PM EDT.
* At 450 PM EDT, As much as 5 or 6 inches of rain may accumulate by
this evening in the higher terrain above the Catawba River
headwaters in western McDowell County. Remain wary of quickly
rising stream levels and the possibility of a few mud or
landslides.
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...
Marion, Old Fort, Lake James, B.R. Parkway-Little Switzerland To
Linville, Pleasant Gardens, Woodlawn, Little Switzerland, North
Cove and Ashford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3588 8202 3587 8200 3589 8197 3589 8193
3586 8193 3582 8199 3576 8199 3572 8196
3567 8203 3562 8206 3554 8212 3553 8215
3556 8223 3559 8229 3561 8226 3563 8225
3569 8228 3569 8225 3573 8218 3584 8210
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
911
WGUS52 KGSP 180043
FFWGSP
NCC111-180630-
/O.EXT.KGSP.FF.W.0028.000000T0000Z-210818T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
843 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has extended
the
* Flash Flood Warning for...
Central McDowell County in western North Carolina...
* Until 230 AM EDT.
* At 843 PM EDT, McDowell County Emergency Management reporting
expanding flooding issues across the county. A few landslides have
been reported and several roads are closed. Additional road
closures are expected. Between 2 and 4 inches of rain have
fallen, but very little additional rainfall is expected. However,
it will take several hours for excessive runoff to subside and for
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...Emergency management reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses. A few
structures may experience flooding and a few roadways
may be damaged or washed out from strong flood waters.
A few landslides may also occur.
* Some locations that may experience increasing flash flooding
include...
Marion, Old Fort, Lake James, Pleasant Gardens, Woodlawn, Little
Switzerland, North Cove and Ashford.
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.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
&&
LAT...LON 3588 8202 3587 8200 3589 8197 3589 8193
3586 8193 3582 8199 3576 8199 3572 8196
3567 8203 3562 8206 3554 8212 3553 8215
3556 8223 3559 8229 3561 8226 3563 8225
3569 8228 3569 8225 3573 8218 3584 8210
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.5 INCHES IN 2 HOURS
$$
JMP898
WGUS72 KGSP 180521
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
121 AM EDT Wed Aug 18 2021
NCC111-180531-
/O.CAN.KGSP.FF.W.0028.000000T0000Z-210818T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McDowell NC-
121 AM EDT Wed Aug 18 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL MCDOWELL COUNTY...
The heavy rain has ended across McDowell County and small streams
across the area have crested and receded below critical levels.
However, nuisance flooding continues for the Catawba River from
Pleasant Gardens to Lake James. Therefore, a Flood Advisory will
remain in effect for the Catawba River until levels recede below
bankfull. Please continue to heed all barricades which remain in
place to ensure roadway safety.
LAT...LON 3588 8202 3587 8200 3589 8197 3589 8193
3586 8193 3582 8199 3576 8199 3572 8196
3567 8203 3562 8206 3554 8212 3553 8215
3556 8223 3559 8229 3561 8226 3563 8225
3569 8228 3569 8225 3573 8218 3584 8210
$$
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, 4:35 PM EDT | Flash Flood Warning | GSP | Buncombe, Henderson, Polk, Rutherford | 8 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.