Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 24, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 17, 2021, 4:08 PM EDT for Madison County, North Carolina. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2021, 4:08 PM EDT (20:08 UTC)
- Expired
- Aug 18, 2021, 1:08 AM EDT
- In force
- 9 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
County Madison County, NC
The radar
The Knoxville radar (KMRX), 71 km from the middle of the area, began a volume at 20:11 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.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.1 hours before the alert went out and 252 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.
758
WGUS52 KGSP 172008
FFWGSP
NCC115-180000-
/O.NEW.KGSP.FF.W.0024.210817T2008Z-210818T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
408 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Madison County in western North Carolina...
* Until 800 PM EDT.
* At 408 PM EDT, Additional heavy tropical-like thunderstorms will
continue to overspread Madison through late afternoon, with
localized rainfall totals nearing 5 inches across the favored
terrain. Flooding of select tributaries of the French Broad River
is likely along an increasing chance of mud and landslides.
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...
Marshall, Mars Hill, Hot Springs, Walnut, Allenstand, Spring
Creek, Faust, Luck, Wolf Ridge and Max Patch.
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.
&&
LAT...LON 3570 8281 3571 8284 3568 8288 3579 8295
3585 8290 3594 8288 3593 8284 3591 8284
3591 8279 3599 8276 3605 8264 3603 8260
3596 8261 3595 8257 3597 8250 3595 8249
3591 8250 3587 8243 3582 8242 3580 8252
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$2 follow-up statements
468
WGUS52 KGSP 172354
FFWGSP
NCC115-180600-
/O.EXT.KGSP.FF.W.0024.000000T0000Z-210818T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
754 PM EDT Tue Aug 17 2021
The National Weather Service in Greenville-Spartanburg has extended
the
* Flash Flood Warning for...
Madison County in western North Carolina...
* Until 200 AM EDT Wednesday.
* At 754 PM EDT, Heavy rain has ended across the warned area of
Madison County. However, excessive runoff continues and many area
streams continue to rise. Additional Minor flooding is likely
over the next few hours before streams start to crest and
conditions improve later tonight. Between 2 and 4 inches of
storm-total rain has fallen. Additional rainfall amounts up to 0.5
inches are possible in the warned area, but this will NOT cause
new flooding to develop. Flash flooding is ongoing! Please avoid
all flooded roadways and stay away from low-lying areas and
low-water crossings, as floodwaters can rise rapidly and without
warning.
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...
Marshall, Mars Hill, Hot Springs, Walnut, Allenstand, Spring
Creek, Faust, Luck, Wolf Ridge and Max Patch.
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.
&&
LAT...LON 3570 8281 3571 8284 3568 8288 3579 8295
3585 8290 3594 8288 3593 8284 3591 8284
3591 8279 3599 8276 3605 8264 3603 8260
3596 8261 3595 8257 3597 8250 3595 8249
3591 8250 3587 8243 3582 8242 3580 8252
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
JMP237
WGUS72 KGSP 180508
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
108 AM EDT Wed Aug 18 2021
NCC115-180518-
/O.CAN.KGSP.FF.W.0024.000000T0000Z-210818T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison NC-
108 AM EDT Wed Aug 18 2021
...FLASH FLOOD WARNING IS CANCELLED FOR MADISON COUNTY...
The heavy rain has ended across Madison County and small streams
across the area have crested and receded below critical levels. Ivy
Creek has fallen back below bankfull levels as well. However, Minor
to Moderate flooding continues for the French Broad River from
Marshall to Hot Springs and Flood Warnings for the river remain in
effect. 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 3570 8281 3571 8284 3568 8288 3579 8295
3585 8290 3594 8288 3593 8284 3591 8284
3591 8279 3599 8276 3605 8264 3603 8260
3596 8261 3595 8257 3597 8250 3595 8249
3591 8250 3587 8243 3582 8242 3580 8252
$$
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, 4:16 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, 6:00 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.