Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Raleigh, NC

April 25, 2011Lee County, Moore County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Apr 25, 2011, 12:34 PM EDT for Lee County, Moore County, North Carolina. It was in force for 88 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 25, 2011, 12:34 PM EDT (16:34 UTC)
Expired: Apr 25, 2011, 2:02 PM EDT
In force: 88 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: Minor

Counties Lee County, NC, Moore County, NC

The radar

The Raleigh/Durham radar (KRAX), 80 km from the middle of the area, began a volume at 16:35 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, 4.6 hours before the alert went out and 98 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: 593 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -61 m²/s²
0-3 km storm-relative helicity: -18 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.

737 
WGUS52 KRAH 251634
FFWRAH
NCC105-125-252130-
/O.NEW.KRAH.FF.W.0002.110425T1634Z-110425T2130Z/
/00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
1234 PM EDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR CAROLINA LAKE DAM NEAR HERDS CREEK IN 
  MOORE COUNTY.

* UNTIL 530 PM EDT.

* AT 1226 PM EDT...THE IMMINENT FAILURE OF CAROLINA LAKE DAM WAS 
  REPORTED BY NORTH CAROLINA EMERGENCY MANAGEMENT. THIS DAM IS 
  LOCATED IN THE CAROLINA LAKES SUBDIVISION NEAR CAMERON NORTH 
  CAROLINA... IN EASTERN MOORE COUNTY. 

LOCAL OFFICIALS REPORT THAT A 10 TO 12 FOOT WIDE BREACH HAS 
DEVELOPED ALONG THE SPILLWAY PIPE OF THE CAROLINA LAKE DAM... AND A 
DAM FAILURE IS IMMINENT. OFFICIALS FROM NORTH CAROLINA DAM SAFETY... 
NORTH CAROLINA WATER QUALITY... AND LOCAL EMERGENCY MANAGEMENT HAVE 
BEEN NOTIFIED AND ARE ON THE SCENE. AREAS AFFECTED WILL BE PRIMARILY 
FOREST LAND SOUTH AND EAST OF THE DAM. POTENTIAL LOCATIONS AFFECTED 
INCLUDE THE FOLLOWING: HERDS CREEK... LAKE REST LANE... CAROLINA 
LAKES ROAD... HEAVENWOOD ROAD... LAMMS GROVE ROAD... AND BAYWOOD 
LANE.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY 
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN 
RALEIGH.

THIS STATEMENT WILL BE UPDATED FREQUENTLY OR AS NEW INFORMATION 
BECOMES AVAILABLE. 

LAT...LON 3540 7929 3539 7921 3532 7922 3525 7928
      3531 7937 3539 7936

$$

GIH

1 follow-up statement

989 
WGUS72 KRAH 251802
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
202 PM EDT MON APR 25 2011

NCC105-125-251809-
/O.CAN.KRAH.FF.W.0002.000000T0000Z-110425T2130Z/
/00000.1.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LEE NC-MOORE NC-
202 PM EDT MON APR 25 2011

...THE FLASH FLOOD WARNING FOR THE IMMINENT FAILURE OF CAROLINA LAKE 
DAM NEAR HERDS CREEK HAS BEEN CANCELLED...

AT 157 PM...EMERGENCY SERVICES OFFICIALS NEAR CAROLINA LAKE DAM NEAR 
HERDS CREEK IN MOORE COUNTY REPORTED THAT THE LAKE HAS DRAINED 
SUFFICIENTLY...AND THE WATER LEVEL WAS RECEDING. AS A RESULT...THE 
THREAT TO WATER COVERING ROADS AND OTHER LOCATIONS HAS SIGNIFICANTLY 
DIMINISHED. BASED ON THE ASSESSMENT OF CONDITIONS FROM OFFICIALS ON 
SCENE...A FLASH FLOOD THREAT NO LONGER EXISTS. THEREFORE...THE FLASH 
FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 3540 7929 3539 7921 3532 7922 3525 7928
      3531 7937 3539 7936

$$

DJF

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.