Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 41, NWS Greenville-Spartanburg, SC

October 7, 2021Henderson County, Rutherford County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Oct 7, 2021, 8:10 AM EDT for Henderson County, Rutherford County, North Carolina. It was in force for 3 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: Oct 7, 2021, 8:10 AM EDT (12:10 UTC)
Expired: Oct 7, 2021, 11:15 AM EDT
In force: 3 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Henderson County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 63 km from the middle of the area, began a volume at 12:14 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, 0.2 hours before the alert went out and 225 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 12 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

916 
WGUS52 KGSP 071210
FFWGSP
NCC089-161-071515-
/O.NEW.KGSP.FF.W.0041.211007T1210Z-211007T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
810 AM EDT Thu Oct 7 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Flash Flood Warning for...
  Northeastern Henderson County in western North Carolina...
  Western Rutherford County in western North Carolina...

* Until 1115 AM EDT.

* At 810 AM EDT, A stream gauge on the Rocky Broad River at Bat Cave 
  indicated flash flooding was occurring along the stream. Between 1 
  and 3 inches of rain have fallen. Additional rainfall amounts up 
  to 1 inch are possible in the warned area. Flash flooding is 
  already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Gauges reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas. The Rocky
           Broad River will overflow its banks between Bat Cave
           and Lake Lure, flooding campgrounds and possibly
           structures immediately along the river.

* Some locations that will experience flash flooding include...
  Lake Lure, Chimney Rock Village, Bat Cave and Chimney Rock State 
  Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3544 8228 3545 8231 3547 8230 3547 8228
      3546 8225 3545 8225 3545 8222 3542 8223

FLASH FLOOD...GAUGE INDICATED

$$

Lane

1 follow-up statement

015 
WGUS72 KGSP 071520
FFSGSP

Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1120 AM EDT Thu Oct 7 2021

NCC089-161-071530-
/O.EXP.KGSP.FF.W.0041.000000T0000Z-211007T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Henderson NC-Rutherford NC-
1120 AM EDT Thu Oct 7 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN HENDERSON AND 
WESTERN RUTHERFORD COUNTIES...

The Flash Flood Warning has been replaced by a Flood Warning for 
ongoing flooding.  Please continue to heed all road closures and 
avoid flooded areas.

LAT...LON 3544 8228 3545 8231 3547 8230 3547 8228
      3546 8225 3545 8225 3545 8222 3542 8223

$$

JMP

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 12:20 AM EDT	Areal Flood Advisory	GSP	Avery, Caldwell	2 hr
Oct 7, 6:40 AM EDT	Areal Flood Advisory	GSP	Buncombe, Haywood, Henderson, Transylvania	3 hr
Oct 7, 6:59 AM EDT	Areal Flood Advisory	GSP	Transylvania	5 hr
Oct 7, 7:08 AM EDT	Areal Flood Advisory	GSP	Jackson, Macon, Transylvania	3 hr
Oct 7, 7:34 AM EDT	Flash Flood Warning	GSP	Buncombe, McDowell, Rutherford	7 hr
Oct 7, 9:05 AM EDT	Special Weather Statement	GSP	Burke	55 min
Oct 7, 9:25 AM EDT	Flash Flood Warning Considerable damage threat	GSP	Burke, McDowell	5 hr
Oct 7, 9:41 AM EDT	River Flood Advisory	GSP	Buncombe, Henderson	3 days
Oct 7, 9:41 AM EDT	River Flood Advisory	GSP	Buncombe	17 hr
Oct 7, 9:46 AM EDT	River Flood Warning	GSP	Henderson, Transylvania	68 hr
Oct 7, 10:53 AM EDT	Areal Flood Advisory	GSP	Transylvania	6 hr
Oct 7, 11:03 AM EDT	Flash Flood Warning	GSP	Burke	6 hr
Oct 7, 11:19 AM EDT	Areal Flood Warning	GSP	Henderson, Rutherford	6 hr
Oct 7, 11:49 AM EDT	Areal Flood Advisory	GSP	Henderson, Polk	8 hr
Oct 7, 1:02 PM EDT	Areal Flood Advisory	GSP	Macon, Swain	8 hr
Oct 7, 2:01 PM EDT	Areal Flood Warning	GSP	Burke, McDowell	4 hr

Nearby

Flash Flood Warnings in North Carolina, 2021 Every 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.