Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 9, NWS Greenville-Spartanburg, SC

April 16, 2011Transylvania County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Apr 16, 2011, 4:54 AM EDT for Transylvania County, North Carolina. It was in force for 6 hr. 1 report 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, 4:54 AM EDT (08:54 UTC)
Expired: Apr 16, 2011, 10:30 AM EDT
In force: 6 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

County Transylvania County, NC

The radar

The Greer radar (KGSP), 66 km from the middle of the area, began a volume at 08:55 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, 5:20 AM EDT	FLASH FLOOD	Little River, NC	THE STAGE OF THE LITTLE RIVER WAS 9.06 FT. FLOOD STAGE IS 9 FT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.9 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-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: 406 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 373 m²/s²
0-3 km storm-relative helicity: 566 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 11.3

Open this sounding in Storm Lab

The text

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

450 
WGUS52 KGSP 160854
FFWGSP
NCC175-161430-
/O.NEW.KGSP.FF.W.0009.110416T0854Z-110416T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

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

* UNTIL 1030 AM EDT

* AT 444 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
  AREA OF VERY HEAVY RAINFALL ACROSS THE WARNED AREA. THROUGH 7      
  AM...AN ADDITIONAL ONE TO TWO INCHES OF RAIN IS EXPECTED ACROSS    
  TRANSYLVANIA COUNTY. AUTOMATED STREAM GAUGES ON THE LITTLE RIVER   
  NEAR PENROSE AND THE DAVIDSON RIVER INDICATE RAPIDLY RISING        
  WATER LEVELS. THE ADDITIONAL RAINFALL AND ONGOING RUNOFF WILL      
  RESULT IN FLOODING ON BOTH THE LITTLE AND DAVIDSON RIVERS.  

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...            
  BREVARD...LAKE TOXAWAY AND ROSMAN. THE LITTLE RIVER MAY FLOOD      
  CASCADE LAKE ROAD NEAR CRAB CREEK ROAD. TURKEY CREEK MAY FLOOD     
  TURKEY PEN GAP TRAILER PARK NEAR HIGHWAY 280 IN BREVARD...AND      
  ALONG DAVIDSON RIVER ROAD NEAR THE OLD HENDERSONVILLE HWY.         
  OTHER FLOOD PRONE ROADS INCLUDE HIGHWAY 276... MORNINGSIDE 
  DRIVE AND NEELY ROAD. 

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.

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.

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 3514 8298 3516 8300 3523 8293 3529 8292
      3531 8290 3532 8283 3542 8274 3530 8262
      3514 8258 3512 8267 3513 8268 3511 8269
      3503 8301 3505 8305

$$

NED

1 follow-up statement

361 
WGUS72 KGSP 161213
FFSGSP

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

NCC175-161430-
/O.CON.KGSP.FF.W.0009.000000T0000Z-110416T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRANSYLVANIA NC-
813 AM EDT SAT APR 16 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR TRANSYLVANIA COUNTY
UNTIL 1030 AM EDT...

AT 802 AM EDT...NATIONAL WEATHER SERVICE STREAM GAUGES INDICATED 
THAT FLASH FLOODING WAS OCCURRING ALONG THE LITTLE RIVER...WHILE 
OTHER STREAMS INCLUDING THE DAVIDSON RIVER AND THE HEADWATERS OF 
THE FRENCH BROAD RIVER WERE NEAR BANKFULL. 

SHOWERS PRODUCING MODERATE TO HEAVY RAIN WILL CONTINUE TO DEVELOP 
OVER SOUTH CAROLINA AND MOVE OVER THE WARNING AREA...AND ADDITIONAL 
RAINFALL AMOUNTS OF ONE HALF TO ONE INCH APPEAR LIKELY. THIS 
ADDITIONAL RAINFALL WILL CAUSE STREAMS AND RIVER THAT ARE NEAR 
BANKFULL TO OVERFLOW AND FLOOD SUCH ROADS AS HANNAH FORD 
ROAD...CASCADE LAKE ROAD...AND DAVIDSON RIVER ROAD. 

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
BREVARD...LAKE TOXAWAY AND ROSMAN.

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 3514 8298 3516 8300 3523 8293 3529 8292
      3531 8290 3532 8283 3542 8274 3530 8262
      3514 8258 3512 8267 3513 8268 3511 8269
      3503 8301 3505 8305

$$
LANE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 4:20 AM EDT	Flash Flood Warning	GSP	Henderson	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.