Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 21, NWS Raleigh, NC

July 21, 2012Halifax County, Warren County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 21, 2012, 7:20 PM EDT for Halifax County, Warren County, North Carolina. It was in force for 3 hr. 3 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
Jul 21, 2012, 7:20 PM EDT (23:20 UTC)
Expired
Jul 21, 2012, 10:15 PM EDT
In force
3 hr
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Flood severity
None

Counties Halifax County, NC, Warren County, NC

The radar

The Norfolk radar (KAKQ), 96 km from the middle of the area, began a volume at 23:23 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

TimeReportWhereRemark
Jul 21, 8:26 PM EDTFLASH FLOODRoanoke Rapids, NCMULTIPLE ROADS WITH AT LEAST 6-8 INCHES OF WATER COVERING THEM...OFFICERS ON THE SCENE
Jul 21, 8:50 PM EDTFLASH FLOOD2 W Littleton, NCENTERPRISE ROAD FLOODED 1 MILE FROM HIGHWAY 158
Jul 21, 8:50 PM EDTFLASH FLOOD3 Nnw Arcola, NCREDMAN ROAD AND HIGHWAY 43 FLOODED

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

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 11.3 hours before the alert went out and 180 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2012-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 622 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2012-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
622 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
29 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.

396 
WGUS52 KRAH 212320
FFWRAH
NCC083-185-220215-
/O.NEW.KRAH.FF.W.0021.120721T2320Z-120722T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
720 PM EDT SAT JUL 21 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HALIFAX COUNTY IN CENTRAL NORTH CAROLINA
  WARREN COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 1015 PM EDT

* AT 718 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER 
WARREN   AND NORTHERN HALIFAX COUNTIES. DOPPLER RADAR ESTIMATED THAT 
2-3 INCHES OF RAIN HAS FALLEN OVER EASTERN WARREN AND NORTHERN 
HALIFAX COUNTIES.

* LOCATIONS THREATENED WITH FLOODING INCLUDE ROANOKE RAPIDS...
  LITTLETON AND HALIFAX.

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3651 7788 3648 7776 3649 7764 3645 7762
      3641 7754 3637 7754 3635 7758 3632 7757
      3633 7744 3624 7737 3622 7738 3621 7806
      3621 7811 3625 7814 3627 7829 3654 7800
      3653 7789

$$

ELLIS
3 follow-up statements
583 
WGUS72 KRAH 220031
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
831 PM EDT SAT JUL 21 2012

NCC083-185-220215-
/O.CON.KRAH.FF.W.0021.000000T0000Z-120722T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HALIFAX NC-WARREN NC-
831 PM EDT SAT JUL 21 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
WARREN AND NORTHERN HALIFAX COUNTIES...

AT 827 PM EDT...LOCAL LAW ENFORCEMENT REPORTED THUNDERSTORMS WITH
VERY HEAVY RAIN OVER WARREN AND NORTHERN HALIFAX COUNTIES. DOPPLER 
RADAR ESTIMATED THAT 4-6 INCHES OF RAIN HAS FALLEN OVER NORTHERN 
HALIFAX COUNTY.

MULTIPLE ROADS IN ROANOKE RAPIDS COVERED BY 6-8 INCHES OF WATER. 
OFFICERS ON THE SCENE. MOTORISTS SHOULD USE EXTREME CAUTION IS THESE 
AREAS.

LOCATIONS THREATENED BY FLOODING INCLUDE BUT ARE NOT LIMITED TO
ROANOKE RAPIDS AND LITTLETON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3651 7788 3648 7776 3649 7764 3645 7762
      3641 7754 3637 7754 3635 7758 3632 7757
      3633 7744 3624 7737 3622 7738 3621 7806
      3621 7811 3625 7814 3627 7829 3654 7800
      3653 7789

$$

ELLIS
914 
WGUS72 KRAH 220119
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
919 PM EDT SAT JUL 21 2012

NCC083-185-220215-
/O.CON.KRAH.FF.W.0021.000000T0000Z-120722T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HALIFAX NC-WARREN NC-
919 PM EDT SAT JUL 21 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
WARREN AND NORTHERN HALIFAX COUNTIES...

AT 913 PM EDT...LOCAL LAW ENFORCEMENT REPORTED THUNDERSTORMS WITH
VERY HEAVY RAIN OVER WARREN AND NORTHERN HALIFAX COUNTIES. DOPPLER 
RADAR ESTIMATED THAT 4-6 INCHES OF RAIN HAS FALLEN OVER EASTERN 
WARREN AND NORTHERN HALIFAX COUNTIES.

EMERGENCY MANAGERS REPORTED FLOODING IN WARREN COUNTY AT REDMAN ROAD 
AND HIGHWAY 43 AND ALSO ON ENTERPRISE ROAD NEAR HIGHWAY 158.

HALIFAX COUNTY 911 REPORTED MULTIPLE ROADS FLOODED IN AND AROUND 
ROANOKE RAPIDS.

LOCATIONS THREATENED BY FLOODING INCLUDE BUT ARE NOT LIMITED TO
ROANOKE RAPIDS AND LITTLETON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3651 7788 3648 7776 3649 7764 3645 7762
      3641 7754 3637 7754 3635 7758 3632 7757
      3633 7744 3624 7737 3622 7738 3621 7806
      3621 7811 3625 7814 3627 7829 3654 7800
      3653 7789

$$

ELLIS
549 
WGUS72 KRAH 220207
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1007 PM EDT SAT JUL 21 2012

NCC083-185-220216-
/O.EXP.KRAH.FF.W.0021.000000T0000Z-120722T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HALIFAX NC-WARREN NC-
1007 PM EDT SAT JUL 21 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM EDT FOR WARREN AND 
NORTHERN HALIFAX COUNTIES...

THE THUNDERSTORMS THAT PRODUCED THE FLOODING HAVE MOVED OUT OF THE 
AREA.

HIGH WATER MAY STILL BE IN LOW LYING AREAS. MOTORISTS ARE URGED TO 
CONTINUE TO EXERCISE CAUTION IN THESE LOCATIONS.

LAT...LON 3651 7788 3648 7776 3649 7764 3645 7762
      3641 7754 3637 7754 3635 7758 3632 7757
      3633 7744 3624 7737 3622 7738 3621 7806
      3621 7811 3625 7814 3627 7829 3654 7800
      3653 7789

$$

ELLIS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 1:13 AM EDTSpecial Weather StatementRAHSampson47 min
Jul 21, 1:21 PM EDTSpecial Weather StatementRAHPerson54 min
Jul 21, 1:46 PM EDTSpecial Weather StatementRAHWake44 min
Jul 21, 2:08 PM EDTSpecial Weather StatementRAHAnson, Cumberland, Hoke, Richmond, Scotland37 min
Jul 21, 2:20 PM EDTSpecial Weather StatementRAHHoke40 min
Jul 21, 2:45 PM EDTSpecial Weather StatementRAHJohnston30 min
Jul 21, 3:10 PM EDTSpecial Weather StatementRAHHoke35 min
Jul 21, 3:24 PM EDTSpecial Weather StatementRAHRichmond51 min
Jul 21, 3:33 PM EDTSpecial Weather StatementRAHWayne57 min
Jul 21, 3:40 PM EDTSevere Thunderstorm WarningRAHJohnston, Sampson, Wayne65 min
Jul 21, 3:43 PM EDTSpecial Weather StatementRAHMoore47 min
Jul 21, 3:47 PM EDTSpecial Weather StatementRAHHoke43 min
Jul 21, 3:50 PM EDTSpecial Weather StatementRAHJohnston55 min
Jul 21, 4:12 PM EDTSpecial Weather StatementRAHHalifax48 min
Jul 21, 4:25 PM EDTSpecial Weather StatementRAHChatham, Harnett, Lee65 min
Jul 21, 4:39 PM EDTSpecial Weather StatementRAHEdgecombe, Wilson66 min
Jul 21, 4:51 PM EDTSpecial Weather StatementRAHNash39 min
Jul 21, 5:14 PM EDTSpecial Weather StatementRAHGranville, Person61 min
Jul 21, 5:20 PM EDTSevere Thunderstorm WarningRAHEdgecombe, Halifax, Nash17 min
Jul 21, 6:02 PM EDTSevere Thunderstorm WarningRAHAlamance, Orange, Person58 min
Jul 21, 6:08 PM EDTSpecial Weather StatementRAHSampson52 min
Jul 21, 6:17 PM EDTSpecial Weather StatementRAHStanly43 min
Jul 21, 6:32 PM EDTSpecial Weather StatementRAHGuilford58 min
Jul 21, 6:36 PM EDTSpecial Weather StatementRAHHalifax, Warren54 min
Jul 21, 6:38 PM EDTSevere Thunderstorm WarningRAHAlamance, Guilford52 min
Jul 21, 6:49 PM EDTSpecial Weather StatementRAHForsyth41 min
Jul 21, 6:52 PM EDTAreal Flood AdvisoryRAHHalifax39 min
Jul 21, 7:12 PM EDTSpecial Weather StatementRAHFranklin, Halifax, Warren63 min
Jul 21, 7:21 PM EDTSevere Thunderstorm WarningRAHFranklin, Vance, Warren39 min
Jul 21, 7:35 PM EDTSpecial Weather StatementRAHGuilford55 min
Jul 21, 7:46 PM EDTSpecial Weather StatementRAHDurham, Orange, Wake59 min

Nearby

Flash Flood Warnings in North Carolina, 2012Every flash flood warning in 2012

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.