Alert archive / North Carolina / Flash Flood Warnings in 2012

Flash Flood Warning 46, NWS Raleigh, NC

September 6, 2012Cumberland County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Sep 6, 2012, 7:43 PM EDT for Cumberland County, North Carolina. It was in force for 76 min. 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: Sep 6, 2012, 7:43 PM EDT (23:43 UTC)
Expired: Sep 6, 2012, 8:59 PM EDT
In force: 76 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

County Cumberland County, NC

The radar

The Raleigh/Durham radar (KRAX), 81 km from the middle of the area, began a volume at 23:43 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
Sep 6, 7:50 PM EDT	FLASH FLOOD	2 S Bonnie Doone, NC	STANDING WATER FORCED VEHICLES TO STOP ON MORGANTON ROAD.

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, 11.7 hours before the alert went out and 158 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: 843 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

852 
WGUS52 KRAH 062343
FFWRAH
NCC051-070145-
/O.NEW.KRAH.FF.W.0046.120906T2343Z-120907T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
743 PM EDT THU SEP 6 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CUMBERLAND COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 945 PM EDT

* AT 739 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER SOUTHERN
  CUMBERLAND COUNTY. DOPPLER RADAR ESTIMATED THAT UP TO TWO INCHES 
OF RAIN HAS FALLEN OVER FAYETTEVILLE AND AREAS JUST TO THE NORTHWEST 
OF THE CITY SINCE 700 PM.  THESE RAINFALL RATES CAN CAUSE FLOODING 
IN FAYETTEVILLE...ESPECIALLY ALONG CROSS CREEK.

* LOCATIONS THREATENED WITH FLOODING INCLUDE FAYETTEVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THE HEAVY RAIN WILL CAUSE FLASH FLOODING OF
CREEKS AND STREAMS...ROADS...LOW LYING AND POOR DRAINAGE AREAS. DO
NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. MANY
ROADS AND INTERSECTIONS IN THE AREA WILL QUICKLY FLOOD. WHEN
ENCOUNTERING FLOODED ROADS 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 3488 7893 3495 7904 3505 7909 3509 7909
      3515 7864 3513 7865 3512 7864 3509 7867
      3499 7865 3491 7854 3486 7850 3484 7885
      3483 7890

$$

22

1 follow-up statement

267 
WGUS72 KRAH 070059
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
859 PM EDT THU SEP 6 2012

NCC051-070108-
/O.CAN.KRAH.FF.W.0046.000000T0000Z-120907T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CUMBERLAND NC-
859 PM EDT THU SEP 6 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHERN CUMBERLAND
COUNTY...

THE HEAVY RAIN THAT PROMPTED THE WARNING HAS MOVED OUT OF THE AREA 
AND LAW ENFORCEMENT IN FAYETTEVILLE HAVE NOT REPORTED ANY 
SIGNIFICANT FLOODING.  THUS...THE FLASH FLOOD WARNING HAS BEEN 
CANCELED.

LAT...LON 3488 7893 3495 7904 3505 7909 3509 7909
      3515 7864 3513 7865 3512 7864 3509 7867
      3499 7865 3491 7854 3486 7850 3484 7885
      3483 7890

$$

22

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 1:18 PM EDT	Special Weather Statement	RAH	Granville, Halifax, Person, Vance, Warren	57 min
Sep 6, 1:37 PM EDT	Special Weather Statement	RAH	Granville, Halifax, Person, Vance, Warren	53 min
Sep 6, 2:24 PM EDT	Special Weather Statement	RAH	Granville, Halifax, Vance, Warren	96 min
Sep 6, 2:39 PM EDT	Areal Flood Advisory	RAH	Halifax	3 hr
Sep 6, 3:42 PM EDT	Special Weather Statement	RAH	Wake	63 min
Sep 6, 4:05 PM EDT	Areal Flood Advisory	RAH	Durham, Orange	3 hr
Sep 6, 4:22 PM EDT	Areal Flood Advisory	RAH	Wake	3 hr
Sep 6, 4:22 PM EDT	Flash Flood Warning	RAH	Orange	2 hr
Sep 6, 4:29 PM EDT	Flash Flood Warning	RAH	Franklin, Wake	3 hr
Sep 6, 4:30 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wake	60 min
Sep 6, 4:43 PM EDT	Special Weather Statement	RAH	Chatham	17 min
Sep 6, 4:50 PM EDT	Special Weather Statement	RAH	Lee	10 min
Sep 6, 5:34 PM EDT	Special Weather Statement	RAH	Johnston	56 min
Sep 6, 5:40 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne	52 min
Sep 6, 6:37 PM EDT	Special Weather Statement	RAH	Cumberland	53 min
Sep 6, 7:23 PM EDT	Areal Flood Advisory	RAH	Cumberland	3 hr

Nearby

Flash Flood Warnings in North Carolina, 2012 Every 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.