Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 32, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 17, 2021, 6:00 PM EDT for Avery County, Burke County, Caldwell County, North Carolina. It was in force for 9 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, 6:00 PM EDT (22:00 UTC)
- Expired
- Aug 18, 2021, 2:49 AM EDT
- In force
- 9 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
Counties Avery County, NC, Burke County, NC, Caldwell County, NC
The radar
The Greer radar (KGSP), 127 km from the middle of the area, began a volume at 22:04 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, 10:17 PM EDT | FLOOD | 1 Wnw Collettsville, NC | JOHNS RIVER ROAD AT HWY 90 IMPASSABLE DUE TO RIVER OVERFLOW |
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, 10.0 hours before the alert went out and 179 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.
208
WGUS52 KGSP 172200
FFWGSP
NCC011-023-027-180200-
/O.NEW.KGSP.FF.W.0032.210817T2200Z-210818T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
600 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Avery County in western North Carolina...
Northwestern Burke County in western North Carolina...
Northwestern Caldwell County in western North Carolina...
* Until 1000 PM EDT.
* At 600 PM EDT, As heavy tropical-like thunderstorms continue to
develop across the warned area this evening, rainfall totals near
favored elevated locales may top out at 5 or 6 inches. Developing
flooding of streams and eventually larger rivers in the area is
likely as the evening wears on.
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...
Newland, Blowing Rock In Caldwell County, Banner Elk, Elk Park,
Beech Mountain In Avery County, Crossnore, Sugar Mountain, Seven
Devils, B.R. Parkway-Linville Falls To Grandfather, Linville
Falls, Grandfather Mountain State Park, Table Rock, B.R.
Parkway-Little Switzerland To Linville, Lake James State Park,
Lake James, Edgemont, Jonas Ridge, Pineola, Linville and Globe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3591 8198 3596 8204 3601 8203 3610 8208
3611 8203 3628 8192 3621 8191 3619 8189
3619 8186 3611 8181 3612 8163 3595 8158
3580 8169 3576 8177 3574 8189 3581 8198
3583 8192 3589 8189 3595 8192 3596 8194
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
191
WGUS52 KGSP 180132
FFWGSP
NCC011-023-027-180700-
/O.EXT.KGSP.FF.W.0032.000000T0000Z-210818T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
932 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has extended
the
* Flash Flood Warning for...
Avery County in western North Carolina...
Northwestern Burke County in western North Carolina...
Northwestern Caldwell County in western North Carolina...
* Until 300 AM EDT.
* At 932 PM EDT, Storm-total rainfall of 2-5 inches has occurred
across Avery, Burke, and Caldwell counties. The heavy rainfall
has left Avery and Burke counties, with no additional rainfall
expected. Heavy rainfall will continue across central and eastern
Caldwell County over the next 60 minutes with flash flooding
developing from Edgemont to Collettsville along the headwaters of
Johns River, Mulberry Creek, and Wilson Creek.
* Avery County Emergency Management is currently conducting
evacuations of low-lying areas. Moderate flooding of the North
Toe River near Newland is ongoing, which will cause flooding to
some structures near the river as well as extensive flooding of
low-lying areas including adjacent campgrounds. Residents near
the North Toe River, Linville River, and Wilson Creek, as well as
all other streams across Avery, Burke, and Caldwell counties are
urged to seek higher ground immediately.
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.
Significant flooding of campgrounds near streams is
expected. Some structural flooding is likely. A few
landslides are also possible.
* Some locations that may continue to experience flash flooding
include...
Newland, Blowing Rock In Caldwell County, Banner Elk, Elk Park,
Beech Mountain In Avery County, Crossnore, Sugar Mountain, Seven
Devils, Linville Falls, Table Rock, Lake James State Park, Lake
James, Edgemont, Jonas Ridge, Pineola, Linville and Globe.
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 3591 8198 3596 8204 3601 8203 3610 8208
3611 8203 3628 8192 3621 8191 3619 8189
3619 8186 3611 8181 3612 8163 3595 8158
3580 8169 3576 8177 3574 8189 3581 8198
3583 8192 3589 8189 3595 8192 3596 8194
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1 INCH IN 1 HOUR
$$
JMP534
WGUS72 KGSP 180649
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
249 AM EDT Wed Aug 18 2021
NCC011-023-027-180658-
/O.CAN.KGSP.FF.W.0032.000000T0000Z-210818T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caldwell NC-Avery NC-Burke NC-
249 AM EDT Wed Aug 18 2021
...THE FLASH FLOOD WARNING FOR NORTHWESTERN CALDWELL...AVERY AND
NORTHWESTERN BURKE COUNTIES IS CANCELLED...
Flash flooding has ended, but elevated river levels remain.
Therefore, the Flash Flood Warning has been replaced by a Flood
Advisory in Avery County and a Flood Warning in Caldwell and Burke
counties. Please continue to heed all evacuation orders and
barricades until officials have determined it is safe to return.
LAT...LON 3591 8198 3596 8204 3601 8203 3610 8208
3611 8203 3628 8192 3621 8191 3619 8189
3619 8186 3611 8181 3612 8163 3595 8158
3580 8169 3576 8177 3574 8189 3581 8198
3583 8192 3589 8189 3595 8192 3596 8194
$$
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, 4:50 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, 6:16 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.