Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 15, NWS Greenville-Spartanburg, SC

August 16, 2021Catawba County, Lincoln County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 16, 2021, 10:24 AM EDT for Catawba County, Lincoln County, North Carolina. It was in force for 3 hr. 2 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 16, 2021, 10:24 AM EDT (14:24 UTC)
Expired: Aug 16, 2021, 1:30 PM EDT
In force: 3 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Catawba County, NC, Lincoln County, NC

The radar

The Greer radar (KGSP), 119 km from the middle of the area, began a volume at 14:23 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 16, 11:45 AM EDT	FLASH FLOOD	3 Nw Lincolnton, NC	RAIN GAGES REPORT NEARLY 6 INCHES OF RAIN RESULTING IN RUNOFF AND WATER COVERED AREAS ALONG RIVER ROAD.
Aug 16, 12:15 PM EDT	FLASH FLOOD	4 Nnw Lincolnton, NC	TRIBUTARY OF THE SOUTH FORK CATAWBA RIVER FLOWING OVER RIVER ROAD. EVENT TIME ESTIMATED.

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, 2.4 hours before the alert went out and 132 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: 635 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

661 
WGUS52 KGSP 161424
FFWGSP
NCC035-109-161730-
/O.NEW.KGSP.FF.W.0015.210816T1424Z-210816T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
1024 AM EDT Mon Aug 16 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Flash Flood Warning for...
  South Central Catawba County in the piedmont of North Carolina...
  Central Lincoln County in the piedmont of North Carolina...

* Until 130 PM EDT.

* At 1024 AM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms
  producing locally excessive rainfall lingering and redeveloping 
  from around Lincolnton and north to the Newton and Conover areas.
  Locally between 2 and 3 inches of rain have already fallen. 
  Additional rainfall amounts of 1 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 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...
  Newton, Lincolnton, Conover, Maiden, Claremont, Boger City and 
  Startown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3558 8127 3561 8128 3564 8128 3569 8130
      3571 8128 3571 8124 3572 8120 3572 8115
      3570 8114 3566 8117 3559 8118 3557 8117
      3554 8117 3552 8118 3548 8122 3542 8122
      3542 8126 3545 8133 3549 8132 3553 8129

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

CSH

1 follow-up statement

780 
WGUS72 KGSP 161531
FFSGSP

Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1131 AM EDT Mon Aug 16 2021

NCC035-109-161730-
/O.CON.KGSP.FF.W.0015.000000T0000Z-210816T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Catawba NC-Lincoln NC-
1131 AM EDT Mon Aug 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM EDT THIS 
AFTERNOON FOR SOUTH CENTRAL CATAWBA AND CENTRAL LINCOLN COUNTIES...

At 1131 AM EDT, Doppler radar indicated lingering torrential showers 
across the warned area.  About 3 or 4 inches of rain have fallen in 
parts of the region, especially North of Lincolnton, west of Maiden 
and south of Newton, where flash flooding is expected to develop and 
may be already occurring.


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...
  Newton, Lincolnton, Conover, Maiden, Claremont, Boger City and 
  Startown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

When it is safe to do so, please report flooding or landslides 
threatening roads or property to the National Weather Service 
Greenville-Spartanburg by calling toll free, 1, 800, 2 6 7, 8 1 0 1, 
by posting on our Facebook page, or via Twitter using hashtag 
NWSGSP. Your message should describe the specific location where 
impacts occurred and the depth of flooding observed.

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

&&

LAT...LON 3558 8127 3561 8128 3564 8128 3565 8126
      3568 8125 3571 8124 3572 8120 3572 8115
      3570 8114 3566 8117 3559 8118 3557 8117
      3554 8117 3552 8118 3548 8122 3542 8122
      3542 8126 3545 8133 3549 8132 3553 8129

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

CSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 8:06 PM EDT	Special Weather Statement	GSP	Cleveland	24 min
Aug 15, 8:07 PM EDT	Special Weather Statement	GSP	Transylvania	23 min
Aug 15, 8:09 PM EDT	Special Weather Statement	GSP	McDowell	36 min
Aug 15, 8:18 PM EDT	Special Weather Statement	GSP	Rutherford	27 min
Aug 15, 8:30 PM EDT	Special Weather Statement	GSP	Catawba, Lincoln	30 min
Aug 15, 8:53 PM EDT	Special Weather Statement	GSP	Transylvania	52 min
Aug 15, 9:05 PM EDT	Special Weather Statement	GSP	Catawba	25 min
Aug 15, 9:18 PM EDT	Special Weather Statement	GSP	McDowell	27 min
Aug 15, 9:45 PM EDT	Special Weather Statement	GSP	Avery	30 min
Aug 16, 2:52 AM EDT	Areal Flood Advisory	GSP	Buncombe, Haywood, Henderson, Jackson, Transylvania	3 hr
Aug 16, 3:02 AM EDT	Flash Flood Warning	GSP	Haywood, Jackson, Transylvania	5 hr
Aug 16, 4:39 AM EDT	Flash Flood Warning	GSP	Jackson, Transylvania	3 hr
Aug 16, 4:59 AM EDT	Flash Flood Warning	GSP	Henderson, Transylvania	3 hr
Aug 16, 7:43 AM EDT	Flash Flood Warning Considerable damage threat	GSP	Transylvania	4 hr
Aug 16, 8:51 AM EDT	Special Weather Statement	GSP	Catawba	39 min
Aug 16, 9:49 AM EDT	Special Weather Statement	GSP	Catawba, Lincoln	41 min
Aug 16, 2:20 PM EDT	Flash Flood Watch	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more	40 hr
Aug 16, 3:46 PM EDT	Special Weather Statement	GSP	Gaston, Mecklenburg	59 min
Aug 16, 4:46 PM EDT	Special Weather Statement	GSP	Transylvania	59 min
Aug 16, 5:14 PM EDT	Special Weather Statement	GSP	Davie, Iredell	76 min
Aug 16, 6:53 PM EDT	Areal Flood Advisory	GSP	Jackson, Transylvania	3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.