Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 29, NWS Raleigh, NC

August 6, 2011Franklin County, Nash County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Aug 6, 2011, 8:09 AM EDT for Franklin County, Nash County, North Carolina. It was in force for 4 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 6, 2011, 8:09 AM EDT (12:09 UTC)
Expired: Aug 6, 2011, 12:00 PM EDT
In force: 4 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

Counties Franklin County, NC, Nash County, NC

The radar

The Raleigh/Durham radar (KRAX), 57 km from the middle of the area, began a volume at 12:10 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 6, 9:50 AM EDT	FLASH FLOOD	2 Ese Nashville, NC	WATER CROSSING OAK LEVEL RD. JUST SOUTH OF NASHVILLE
Aug 6, 9:50 AM EDT	FLASH FLOOD	2 Wnw Spring Hope, NC	WATER CROSSING SEVEN PASS RD. AT TURKEY CREEK

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, 0.2 hours before the alert went out and 159 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: 1058 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 94 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.

300 
WGUS52 KRAH 061209
FFWRAH
NCC069-127-061600-
/O.NEW.KRAH.FF.W.0029.110806T1209Z-110806T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
809 AM EDT SAT AUG 6 2011

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FRANKLIN COUNTY IN CENTRAL NORTH CAROLINA
  NASH COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL NOON EDT

* AT 805 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN MOVING OVER NASH AND FRANKLIN 
  COUNTIES. DOPPLER RADAR ESTIMATED THAT BETWEEN 1 AND 3 INCHES OF   
  RAIN HAS FALLEN ACROSS FAR SOUTHERN FRANKLIN AND SOUTHWESTERN NASH 
  COUNTIES DURING THE PAST 2 HOURS. 

* LOCATIONS THREATENED WITH FLOODING INCLUDE NASHVILLE...LOUISBURG...
  FRANKLINTON...DORTCHES...BUNN AND BAILEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXTREMELY DANGEROUS. NUMEROUS ROADS AND LOW LYING
AREAS WILL QUICKLY FLOOD. FLOOD WATERS WILL ALSO THREATEN SOME HOMES
AND BUSINESSES. IF YOU ARE EXPERIENCING FLOODING OR LIVE IN A FLOOD
PRONE AREA MOVE TO HIGHER GROUND.

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.

&&

LAT...LON 3625 7813 3621 7811 3621 7802 3617 7798
      3619 7797 3619 7792 3615 7789 3613 7772
      3615 7770 3584 7784 3584 7790 3573 7820
      3577 7825 3587 7828 3598 7844 3602 7855
      3618 7850 3616 7842 3623 7838 3627 7830

$$

BLAES

3 follow-up statements

023 
WGUS72 KRAH 061324
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
924 AM EDT SAT AUG 6 2011

NCC069-127-061600-
/O.CON.KRAH.FF.W.0029.000000T0000Z-110806T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN NC-NASH NC-
924 AM EDT SAT AUG 6 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR NASH
AND FRANKLIN COUNTIES...

AT 916 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH VERY HEAVY RAIN OVER NASH AND FRANKLIN 
COUNTIES. DOPPLER RADAR ESTIMATED THAT TWO TO THREE INCHES OF RAIN 
HAS FALLEN BETWEEN BUNN AND SPRING HOPE SINCE 7 AM THIS MORNING.

THE HEAVIEST RAIN IS MOVING FROM EASTERN WAKE COUNTY INTO THE 
SOUTHERN PORTIONS OF NASH AND FRANKLIN COUNTIES.  COMMUNITIES FROM 
PILOT TO BUNN AND SPRING HOPE CAN EXPECT ANOTHER ONE TO TWO INCHES 
OF RAIN OVER THE NEXT HOUR.

LOCATIONS THREATENED BY FLOODING INCLUDE BUT ARE NOT LIMITED TO
LOUISBURG AND FRANKLINTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
AS LITTLE AS 6 INCHES OF WATER CAN CAUSE YOU TO LOSE CONTROL OF YOUR
VEHICLE. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES
INCLUDING SPORT UTILITY VEHICLES AND PICKUP TRUCKS. TURN AROUND...
DONT DROWN.

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.

&&

LAT...LON 3625 7813 3621 7811 3621 7802 3617 7798
      3619 7797 3619 7792 3615 7789 3613 7772
      3615 7770 3584 7784 3584 7790 3573 7820
      3577 7825 3587 7828 3598 7844 3602 7855
      3618 7850 3616 7842 3623 7838 3627 7830

$$

22

864 
WGUS72 KRAH 061430
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1030 AM EDT SAT AUG 6 2011

NCC069-127-061600-
/O.CON.KRAH.FF.W.0029.000000T0000Z-110806T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN NC-NASH NC-
1030 AM EDT SAT AUG 6 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR NASH
AND SOUTHERN FRANKLIN COUNTIES...

AT 1021 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE SLOW MOVING THUNDERSTORMS PRODUCING FLOODING OVER NASH AND 
SOUTHEASTERN FRANKLIN COUNTIES. DOPPLER RADAR ESTIMATES THAT BETWEEN 
1 AND 3 INCHES OF RAIN HAS FALLEN NEAR BUNN...SPRING HOPE AND 
NASHVILLE SINCE 700 AM. 

ANOTHER 1 TO 2 INCHES OF RAIN IS POSSIBLE IN SOUTHEASTERN FRANKLIN 
AND NASH COUNTIES THROUGH NOON WHICH COULD RESULT IN ADDITIONAL 
FLOODING. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING 
OF SMALL CREEKS AND STREAMS...STREETS AND UNDERPASSES AS WELL AS 
OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
AS LITTLE AS 6 INCHES OF WATER CAN CAUSE YOU TO LOSE CONTROL OF YOUR
VEHICLE. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES
INCLUDING SPORT UTILITY VEHICLES AND PICKUP TRUCKS. TURN AROUND...
DONT DROWN.

PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.

&&

LAT...LON 3617 7792 3615 7789 3613 7772 3615 7770
      3584 7784 3584 7790 3573 7820 3577 7825
      3587 7828 3598 7844 3605 7837 3609 7816
      3618 7799 3617 7798 3619 7796 3619 7792

$$

BLAES

218 
WGUS72 KRAH 061600
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1200 PM EDT SAT AUG 6 2011

NCC069-127-061606-
/O.EXP.KRAH.FF.W.0029.000000T0000Z-110806T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRANKLIN NC-NASH NC-
1200 PM EDT SAT AUG 6 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT NOON EDT FOR NASH AND
SOUTHERN FRANKLIN COUNTIES...

WIDESPREAD HEAVY RAIN HAS ENDED ACROSS NASH AND FRANKLIN COUNTIES 
BUT SCATTERED RAIN SHOWERS WILL CONTINUE INTO EARLY THIS AFTERNOON. 
DESPITE THE END OF THE WIDESPREAD HEAVY RAIN...CREEKS AND STREAMS IN 
THE AREA WILL REMAIN HIGH AND SWIFT THROUGH THIS AFTERNOON.

BETWEEN 2 AND 4 INCHES OF RAIN FELL ACROSS PARTS OF NASH AND 
FRANKLIN COUNTIES THIS MORNING WITH THE HEAVIEST RAIN FALLING NEAR 
BUNN...SPRING HOPE AND NASHVILLE.

&&

LAT...LON 3617 7792 3615 7789 3613 7772 3615 7770
      3584 7784 3584 7790 3573 7820 3577 7825
      3587 7828 3598 7844 3605 7837 3609 7816
      3618 7799 3617 7798 3619 7796 3619 7792

$$

BLAES

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 5:01 AM EDT	Special Weather Statement	RAH	Wake	89 min
Aug 6, 5:14 AM EDT	Areal Flood Advisory	RAH	Wake	3 hr
Aug 6, 6:24 AM EDT	Flash Flood Warning	RAH	Wake	3 hr
Aug 6, 7:31 AM EDT	Areal Flood Advisory	RAH	Chatham, Durham, Granville, Orange	119 min
Aug 6, 8:02 AM EDT	Areal Flood Advisory	RAH	Franklin, Nash	3 hr
Aug 6, 8:49 AM EDT	Flash Flood Warning	RAH	Wake	3 hr
Aug 6, 11:16 AM EDT	Tornado Warning	RAH	Wilson	44 min
Aug 6, 4:36 PM EDT	Severe Thunderstorm Warning	RAH	Davidson	32 min
Aug 6, 6:48 PM EDT	Areal Flood Advisory	RAH	Sampson	102 min
Aug 6, 6:55 PM EDT	Special Weather Statement	RAH	Montgomery, Randolph, Stanly	110 min
Aug 6, 6:56 PM EDT	Special Weather Statement	RAH	Montgomery, Randolph, Stanly	109 min
Aug 6, 7:24 PM EDT	Special Weather Statement	RAH	Person	51 min
Aug 6, 7:30 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Stanly	46 min

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.