Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS Greenville-Spartanburg, SC

April 16, 2011Henderson County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Apr 16, 2011, 4:20 AM EDT for Henderson County, North Carolina. It was in force for 6 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: Apr 16, 2011, 4:20 AM EDT (08:20 UTC)
Expired: Apr 16, 2011, 10:00 AM EDT
In force: 6 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

County Henderson County, NC

The radar

The Greer radar (KGSP), 53 km from the middle of the area, began a volume at 08:21 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
Apr 16, 5:25 AM EDT	FLASH FLOOD	Hendersonville, NC	THE STAGE ON MUD CREEK WAS 7.52 FT. FLOOD STAGE IS 7.5 FT.
Apr 16, 5:45 AM EDT	FLASH FLOOD	Hendersonville, NC	THE STAGE ON BAT FORK CREEK WAS 7.18 FT. FLOOD STAGE IS 7 FT.

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 00:00Z, 8.3 hours before the alert went out and 246 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2387 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

701 
WGUS52 KGSP 160820
FFWGSP
NCC089-161400-
/O.NEW.KGSP.FF.W.0008.110416T0820Z-110416T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
420 AM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HENDERSON COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 1000 AM EDT

* AT 411 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
  AREA OF VERY HEAVY RAINFALL ACROSS THE WARNED AREA. HOURLY         
  RAINFALL RATES WILL RANGE FROM ONE TO TWO INCHES THROUGH 7 AM.     
  AUTOMATED STREAM GAUGES ALONG MUD CREEK AND BAT FORK               
  CREEKS INDICATED RAPIDLY RISING WATER LEVELS. BOTH MUD AND BAT     
  FORK CREEKS ARE FORECAST TO EXCEED FLOOD STAGE BY SUNRISE.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO   
  OCCUR. FLOODING IS EXPECTED ALONG BAT FORK CREEK IN THE            
  HENDERSONVILLE AIRPORT AREA ESPECIALLY ALONG SHEPHERD STREET AND   
  NEW HOPE ROAD. FLOODING ALONG MUD CREEK NEAR THE JUNCTION OF       
  HIGHWAY 25 AND 176...7TH AVENUE AND KING STREET. IN                
  ADDITION...FLOODING MAY OCCUR ALONG MUD CREEK NEAR THE BROOKSIDE   
  CAMP AND BALFOUR ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES OR OTHER
SEVERE WEATHER THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL
FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3548 8228 3539 8226 3528 8235 3519 8236
      3519 8238 3521 8239 3518 8243 3516 8255
      3515 8258 3529 8261 3543 8274 3544 8255
      3542 8254 3544 8253

$$

NED

1 follow-up statement

046 
WGUS72 KGSP 161155
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
755 AM EDT SAT APR 16 2011

NCC089-161400-
/O.CON.KGSP.FF.W.0008.000000T0000Z-110416T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HENDERSON NC-
755 AM EDT SAT APR 16 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR HENDERSON COUNTY UNTIL
1000 AM EDT...

AT 745 AM EDT...NATIONAL WEATHER SERVICE STREAM GAUGES INDICATED 
THAT FLASH FLOODING OF SMALL STREAMS WAS OCCURRING IN THE 
HENDERSONVILLE AREA...INCLUDING MUD CREEK AND BAT FORK CREEK. THESE 
STREAMS WILL LIKELY FLOOD ROADS ON THE SOUTH SIDE OF 
HENDERSONVILLE...INCLUDING AIRPORT ROAD...PORTIONS OF DANA ROAD... 
GROVE STREET...AND PORTIONS OF GREENVILLE HIGHWAY. 

SHOWERS PRODUCING MODERATE TO HEAVY RAIN WILL CONTINUE TO DEVELOP 
OVER SOUTH CAROLINA AND MOVE OVER THE WARNING AREA...AND ADDITIONAL 
RAINFALL AMOUNTS OF AROUND AN INCH APPEAR LIKELY. ADDITIONAL FLASH 
FLOODING WILL LIKELY OCCUR ACROSS THE SOUTHWEST PART OF THE 
COUNTY...INCLUDING ROCK CREEK AND OTHER SMALL TRIBUTARIES OF THE 
FRENCH BROAD RIVER.       

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
HENDERSONVILLE...BAT CAVE...EDNEYVILLE...ETOWAH...FLAT ROCK...
FLETCHER AND MOUNTAIN HOME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3548 8228 3539 8226 3528 8235 3519 8236
      3519 8238 3521 8239 3518 8243 3516 8255
      3515 8258 3529 8261 3543 8274 3544 8255
      3542 8254 3544 8253

$$
LANE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 4:54 AM EDT	Flash Flood Warning	GSP	Transylvania	6 hr
Apr 16, 7:23 AM EDT	River Flood Warning	GSP	Henderson, Transylvania	60 hr
Apr 16, 7:37 AM EDT	Areal Flood Advisory	GSP	Avery, Mitchell, Yancey	4 hr
Apr 16, 8:35 AM EDT	Flash Flood Warning	GSP	Avery, Burke, Caldwell, McDowell, Mitchell, Yancey	6 hr
Apr 16, 9:48 AM EDT	Areal Flood Warning	GSP	Henderson, Transylvania	6 hr
Apr 16, 10:23 AM EDT	Special Weather Statement	GSP	Cleveland	37 min
Apr 16, 11:01 AM EDT	Special Weather Statement	GSP	Catawba, Gaston, Lincoln	29 min
Apr 16, 11:31 AM EDT	Special Weather Statement	GSP	Alexander, Catawba, Gaston, Iredell, Lincoln, Mecklenburg	29 min
Apr 16, 11:50 AM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Davie, Gaston, Iredell, Lincoln, Mecklenburg and 1 more	40 min
Apr 16, 11:59 AM EDT	Special Weather Statement	GSP	Mecklenburg, Union	46 min
Apr 16, 12:30 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Davie, Rowan	45 min
Apr 16, 12:40 PM EDT	Tornado Warning	GSP	Davie, Rowan	18 min
Apr 16, 12:46 PM EDT	Special Weather Statement	GSP	Union	44 min
Apr 16, 1:00 PM EDT	Tornado Warning	GSP	Union	26 min
Apr 16, 2:16 PM EDT	Areal Flood Warning	GSP	Burke, Caldwell	6 hr
Apr 16, 3:31 PM EDT	Areal Flood Advisory	GSP	Henderson, Transylvania	119 min
Apr 16, 3:52 PM EDT	Lake Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	14 hr
Apr 16, 3:52 PM EDT	Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	4 hr
Apr 16, 7:53 PM EDT	Areal Flood Warning	GSP	Burke, Caldwell	6 hr

Nearby

Flash Flood Warnings in North Carolina, 2011 Every flash flood warning in 2011

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.