Alert archive / North Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 40, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Sep 3, 2012, 1:01 PM EDT for Forsyth County, North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 3, 2012, 1:01 PM EDT (17:01 UTC)
- Expired
- Sep 3, 2012, 4:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
County Forsyth County, NC
The radar
The Roanoke radar (KFCX), 105 km from the middle of the area, began a volume at 17:04 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, 5.0 hours before the alert went out and 42 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.
- Mixed-layer CAPE
- 576 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 801 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
673
WGUS52 KRAH 031701
FFWRAH
NCC067-032000-
/O.NEW.KRAH.FF.W.0040.120903T1701Z-120903T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
101 PM EDT MON SEP 3 2012
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* FLASH FLOOD WARNING FOR...
FORSYTH COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 400 PM EDT
* AT 1256 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER
FORSYTH COUNTY. DOPPLER RADAR ESTIMATED THAT ONE TO TWO INCHES OF
RAIN HAS FALLEN OVER WINSTON SALEM.
* LOCATIONS THREATENED WITH FLOODING INCLUDE WINSTON-SALEM...
KERNERSVILLE...CLEMMONS.
AN ADDITIONAL ONE TO TWO INCHES OF RAINFALL ARE STILL POSSIBLE
RESULTING IN ADDITIONAL FLOODING.
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 3614 8044 3622 8044 3626 8045 3626 8003
3601 8005 3603 8021 3600 8022 3600 8032
3597 8040 3599 8043 3601 8042 3606 8047
3604 8048 3605 8051 3611 8051
$$
102 follow-up statements
567
WGUS72 KRAH 031813
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
213 PM EDT MON SEP 3 2012
NCC067-032000-
/O.CON.KRAH.FF.W.0040.000000T0000Z-120903T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FORSYTH NC-
213 PM EDT MON SEP 3 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR
FORSYTH COUNTY...
AT 208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED
THAT OVER 3 INCHES OF RAIN HAS FALLEN OVER WINSTON SALEM. ALTHOUGH
THE STORMS HAVE MOVED OUT OF THE AREA...ANOTHER ROUND OF STORMS WITH
HEAVY RAIN IS LIKELY OVER FORSYTH COUNTY THROUGH 4 PM.
LOCATIONS THREATENED BY FLOODING INCLUDE BUT ARE NOT LIMITED TO
WINSTON-SALEM AND KERNERSVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THE HEAVY RAIN WILL CAUSE FLASH FLOODING OF
CREEKS AND STREAMS...ROADS...LOW LYING AND POOR DRAINAGE AREAS. DO
NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. MANY
ROADS AND INTERSECTIONS IN THE AREA WILL QUICKLY FLOOD. WHEN
ENCOUNTERING FLOODED ROADS TURN AROUND...DONT DROWN.
PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.
&&
LAT...LON 3614 8044 3622 8044 3626 8045 3626 8003
3601 8005 3603 8021 3600 8022 3600 8032
3597 8040 3599 8043 3601 8042 3606 8047
3604 8048 3605 8051 3611 8051
$$
10415
WGUS72 KRAH 031954
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
354 PM EDT MON SEP 3 2012
NCC067-032003-
/O.EXP.KRAH.FF.W.0040.000000T0000Z-120903T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FORSYTH NC-
354 PM EDT MON SEP 3 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM EDT FOR FORSYTH
COUNTY...
AT 351 PM EDT...THE THUNDERSTORMS THAT WERE PRODUCING VERY HEAVY
RAIN OVER FORSYTH COUNTY HAVE WEAKENED AND MOVED OUT OF THE AREA.
THE FLOODING THREAT HAS ENDED AND THE WARNING WILL BE ALLOWED TO
EXPIRE.
LAT...LON 3614 8044 3622 8044 3626 8045 3626 8003
3601 8005 3603 8021 3600 8022 3600 8032
3597 8040 3599 8043 3601 8042 3606 8047
3604 8048 3605 8051 3611 8051
$$
10The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 8:20 PM EDT | Special Weather Statement | RAH | Alamance, Orange | 85 min |
| Sep 2, 8:28 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Durham, Orange, Person | 53 min |
| Sep 2, 8:42 PM EDT | Tornado Warning | RAH | Durham, Orange, Person | 33 min |
| Sep 2, 9:20 PM EDT | Special Weather Statement | RAH | Granville, Vance | 55 min |
| Sep 2, 9:43 PM EDT | Special Weather Statement | RAH | Chatham, Durham, Lee, Moore, Orange | 62 min |
| Sep 2, 10:26 PM EDT | Special Weather Statement | RAH | Lee, Wake | 94 min |
| Sep 2, 11:09 PM EDT | Special Weather Statement | RAH | Franklin, Granville, Nash, Wake | 51 min |
| Sep 2, 11:42 PM EDT | Areal Flood Advisory | RAH | Wake | 108 min |
| Sep 3, 2:35 AM EDT | Areal Flood Advisory | RAH | Montgomery, Richmond | 99 min |
| Sep 3, 1:00 PM EDT | Special Weather Statement | RAH | Davidson, Forsyth, Guilford, Randolph | 90 min |
| Sep 3, 1:06 PM EDT | Special Weather Statement | RAH | Anson, Montgomery, Stanly | 84 min |
| Sep 3, 1:09 PM EDT | Areal Flood Advisory | RAH | Stanly | 3 hr |
| Sep 3, 1:18 PM EDT | Flash Flood Warning | RAH | Stanly | 3 hr |
| Sep 3, 1:21 PM EDT | Severe Thunderstorm Warning | RAH | Forsyth, Guilford | 39 min |
| Sep 3, 1:27 PM EDT | Severe Thunderstorm Warning | RAH | Montgomery, Randolph, Stanly | 48 min |
| Sep 3, 2:23 PM EDT | Areal Flood Advisory | RAH | Guilford | 3 hr |
| Sep 3, 2:35 PM EDT | Special Weather Statement | RAH | Anson, Montgomery, Moore, Richmond, Stanly | 85 min |
| Sep 3, 2:38 PM EDT | Special Weather Statement | RAH | Davidson, Forsyth, Guilford, Randolph | 97 min |
| Sep 3, 2:53 PM EDT | Flash Flood Warning | RAH | Guilford | 3 hr |
| Sep 3, 3:34 PM EDT | Areal Flood Advisory | RAH | Randolph | 2 hr |
| Sep 3, 3:59 PM EDT | Special Weather Statement | RAH | Hoke, Lee, Moore, Richmond, Scotland | 91 min |
| Sep 3, 4:03 PM EDT | Special Weather Statement | RAH | Alamance, Chatham, Orange | 87 min |
| Sep 3, 4:14 PM EDT | Flash Flood Warning | RAH | Stanly | 2 hr |
| Sep 3, 4:17 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Orange | 58 min |
| Sep 3, 4:52 PM EDT | Areal Flood Advisory | RAH | Alamance, Orange | 2 hr |
| Sep 3, 4:57 PM EDT | Severe Thunderstorm Warning | RAH | Richmond, Scotland | 48 min |
| Sep 3, 5:40 PM EDT | Areal Flood Advisory | RAH | Durham, Orange | 3 hr |
| Sep 3, 5:41 PM EDT | Special Weather Statement | RAH | Wake | 64 min |
| Sep 3, 5:49 PM EDT | Special Weather Statement | RAH | Wilson | 56 min |
| Sep 3, 6:21 PM EDT | Special Weather Statement | RAH | Durham | 54 min |
| Sep 3, 7:41 PM EDT | Special Weather Statement | RAH | Wake | 64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.