Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Greenville-Spartanburg, SC

August 16, 2021Haywood County, Jackson County, Transylvania County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 16, 2021, 3:02 AM EDT for Haywood County, Jackson County, Transylvania County, North Carolina. It was in force for 5 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 16, 2021, 3:02 AM EDT (07:02 UTC)
Expired
Aug 16, 2021, 7:45 AM EDT
In force
5 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Haywood County, NC, Jackson County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 76 km from the middle of the area, began a volume at 07:03 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.0 hours before the alert went out and 254 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2021-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 919 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2021-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
919 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
972 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

329 
WGUS52 KGSP 160702
FFWGSP
NCC087-099-175-161015-
/O.NEW.KGSP.FF.W.0010.210816T0702Z-210816T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
302 AM EDT Mon Aug 16 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Flash Flood Warning for...
  Southeastern Haywood County in western North Carolina...
  Southeastern Jackson County in western North Carolina...
  Central Transylvania County in western North Carolina...

* Until 615 AM EDT.

* At 302 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Additional rainfall amounts up to 1 inch 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...
  Graveyard Fields, Black Balsam Area, B.R. Parkway-Black Balsam To 
  Mount Pisgah, Lake Toxaway, B.R. Parkway-Balsam Gap To Black 
  Balsam Area, Gorges State Park, Balsam Grove, Wolf Mountain, Cruso 
  and Sapphire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3511 8304 3516 8305 3526 8300 3536 8291
      3544 8285 3545 8283 3538 8272 3526 8280
      3511 8294 3509 8300

FLASH FLOOD...RADAR INDICATED

$$

Krentz
2 follow-up statements
073 
WGUS72 KGSP 160757
FFSGSP

Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
357 AM EDT Mon Aug 16 2021

NCC087-099-175-161015-
/O.CON.KGSP.FF.W.0010.000000T0000Z-210816T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Haywood NC-Jackson NC-Transylvania NC-
357 AM EDT Mon Aug 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM EDT THIS 
MORNING FOR SOUTHEASTERN HAYWOOD, SOUTHEASTERN JACKSON AND CENTRAL 
TRANSYLVANIA COUNTIES...

At 357 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 3 and 5 inches of rain have 
fallen. Additional rainfall amounts up 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...
  Graveyard Fields, Black Balsam Area, B.R. Parkway-Black Balsam To 
  Mount Pisgah, Lake Toxaway, B.R. Parkway-Balsam Gap To Black 
  Balsam Area, Gorges State Park, Balsam Grove, Wolf Mountain, Cruso 
  and Sapphire.

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.

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3511 8304 3516 8305 3526 8300 3536 8291
      3544 8285 3545 8283 3538 8272 3526 8280
      3511 8294 3509 8300

FLASH FLOOD...RADAR INDICATED

$$

Krentz
786 
WGUS52 KGSP 160959
FFWGSP
NCC087-099-175-161145-
/O.EXT.KGSP.FF.W.0010.000000T0000Z-210816T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
559 AM EDT Mon Aug 16 2021

The National Weather Service in Greenville-Spartanburg has extended 
the

* Flash Flood Warning for...
  Southeastern Haywood County in western North Carolina...
  Southeastern Jackson County in western North Carolina...
  Central Transylvania County in western North Carolina...

* Until 745 AM EDT.

* At 559 AM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  4 and 7 inches of rain have fallen since 1 am. Additional rainfall 
  amounts up to 1 inch are possible in the warned area. Flash 
  flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flash flooding of small creeks and streams, highways,
           streets and underpasses as well as other poor drainage
           and low-lying areas.

* Some locations that will experience flash flooding include...
  Graveyard Fields, Black Balsam Area, B.R. Parkway-Black Balsam To 
  Mount Pisgah, Lake Toxaway, B.R. Parkway-Balsam Gap To Black 
  Balsam Area, Gorges State Park, Balsam Grove, Wolf Mountain, Cruso 
  and Sapphire.

Rain will end temporarily across the Warned area by 630 am, but 
water will continue to rise on streams that drain into the French 
Broad River above Rosman and into Lake Toxaway and Lake Jocassee.

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.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 3511 8304 3516 8305 3526 8300 3536 8291
      3544 8285 3545 8283 3538 8272 3526 8280
      3511 8294 3509 8300

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Moore

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 15, 8:06 PM EDTSpecial Weather StatementGSPCleveland24 min
Aug 15, 8:07 PM EDTSpecial Weather StatementGSPTransylvania23 min
Aug 15, 8:09 PM EDTSpecial Weather StatementGSPMcDowell36 min
Aug 15, 8:18 PM EDTSpecial Weather StatementGSPRutherford27 min
Aug 15, 8:30 PM EDTSpecial Weather StatementGSPCatawba, Lincoln30 min
Aug 15, 8:53 PM EDTSpecial Weather StatementGSPTransylvania52 min
Aug 15, 9:05 PM EDTSpecial Weather StatementGSPCatawba25 min
Aug 15, 9:18 PM EDTSpecial Weather StatementGSPMcDowell27 min
Aug 15, 9:45 PM EDTSpecial Weather StatementGSPAvery30 min
Aug 16, 2:52 AM EDTAreal Flood AdvisoryGSPBuncombe, Haywood, Henderson, Jackson, Transylvania3 hr
Aug 16, 4:39 AM EDTFlash Flood WarningGSPJackson, Transylvania3 hr
Aug 16, 4:59 AM EDTFlash Flood WarningGSPHenderson, Transylvania3 hr
Aug 16, 7:43 AM EDTFlash Flood Warning Considerable damage threatGSPTransylvania4 hr
Aug 16, 8:51 AM EDTSpecial Weather StatementGSPCatawba39 min
Aug 16, 9:49 AM EDTSpecial Weather StatementGSPCatawba, Lincoln41 min
Aug 16, 10:24 AM EDTFlash Flood WarningGSPCatawba, Lincoln3 hr
Aug 16, 2:20 PM EDTFlash Flood WatchGSPAvery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more40 hr
Aug 16, 3:46 PM EDTSpecial Weather StatementGSPGaston, Mecklenburg59 min
Aug 16, 4:46 PM EDTSpecial Weather StatementGSPTransylvania59 min
Aug 16, 5:14 PM EDTSpecial Weather StatementGSPDavie, Iredell76 min
Aug 16, 6:53 PM EDTAreal Flood AdvisoryGSPJackson, Transylvania3 hr

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.