Alert archive / North Carolina / Flash Flood Warnings in 2011
Flash Flood Warning 22, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Jul 8, 2011, 9:33 PM EDT for Davidson County, Forsyth County, North Carolina. It was in force for 3 hr. 5 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 8, 2011, 9:33 PM EDT (01:33 UTC)
- Expired
- Jul 9, 2011, 12:30 AM EDT
- In force
- 3 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
Counties Davidson County, NC, Forsyth County, NC
The radar
The Roanoke radar (KFCX), 119 km from the middle of the area, began a volume at 01:33 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 |
|---|---|---|---|
| Jul 8, 10:10 PM EDT | FLASH FLOOD | 4 E Clemmons, NC | ROAD CLOSED DUE TO FLOODING AT GRIFFITH RD AND WEST CLEMMONSVILLE RD. |
| Jul 8, 11:45 PM EDT | FLASH FLOOD | 2 Ne Welcome, NC | OLD MOUNTAIN ROAD CLOSED NORTH OF LEXINGTON DUE TO FLASH FLOODING 2-3 FEET OF WATER CROSSING ROAD. |
| Jul 8, 11:45 PM EDT | FLASH FLOOD | 2 Nne Lexington, NC | FLASH FLOODING ON MAIN STREET IN LEXINGTON. SEVERAL INTERSECTIONS CLOSED. |
| Jul 8, 11:45 PM EDT | FLASH FLOOD | Lexington, NC | FLASH FLOODING HAS CLOSED BENLEE ROAD IN LEXINGTON. |
| Jul 9, 12:40 AM EDT | FLASH FLOOD | Gordontown, NC | FIRE DEPARTMENT REPORTED NEW CUT ROAD CLOSED DUE TO FLOODING. |
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 00:00Z, 1.6 hours before the alert went out and 44 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
- 884 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
The text
As transmitted, in the capitals the NWS used until 2016.
856
WGUS52 KRAH 090133
FFWRAH
NCC057-067-090430-
/O.NEW.KRAH.FF.W.0022.110709T0133Z-110709T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
933 PM EDT FRI JUL 8 2011
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* FLASH FLOOD WARNING FOR...
DAVIDSON COUNTY IN CENTRAL NORTH CAROLINA
FORSYTH COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 1230 AM EDT
* AT 931 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER FORSYTH
AND NORTHERN DAVIDSON COUNTIES. RAINFALL RATES IN EXCESS OF 3 INCHES
PER HOUR WILL PRODUCE FLASH FLOODING.
* LOCATIONS THREATENED WITH FLOODING INCLUDE WINSTON-SALEM...
THOMASVILLE...LINWOOD...LEXINGTON...KERNERSVILLE...CLEMMONS AND
BELEWS CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
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.
&&
LAT...LON 3585 8039 3589 8042 3590 8039 3589 8037
3596 8038 3599 8043 3601 8042 3606 8047
3605 8048 3612 8047 3614 8044 3626 8046
3626 8004 3626 8003 3566 8006 3568 8034
3572 8033 3573 8045 3584 8049
$$
BADGETT2 follow-up statements
483
WGUS72 KRAH 090218
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1018 PM EDT FRI JUL 8 2011
NCC057-067-090430-
/O.CON.KRAH.FF.W.0022.000000T0000Z-110709T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON NC-FORSYTH NC-
1018 PM EDT FRI JUL 8 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR
FORSYTH AND DAVIDSON COUNTIES...
AT 1017 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS THAT WERE CONTINUOUSLY MOVING OVER THE SAME
AREAS. THIS TRAINING OF THE STORMS HAS ALREADY PRODUCED 2 TO LOCALLY
5 INCHES OF RAIN ACROSS PORTIONS OF WESTERN AND NORTHERN DAVIDSON
COUNTY INTO CENTRAL FORSYTH COUNTY. AN ADDITIONAL 1 TO 2 INCHES OF
RAIN MAY FALL FROM WEST END TO ARCADIA TO WINSTON-SALEM BEFORE THE
STORMS END.
THIS WILL PRODUCE AN EXTREMELY DANGEROUS NIGHTTIME FLOODING EPISODE
ESPECIALLY FROM THE YADKIN RIVER TO LINWOOD NORTHEAST TO MIDWAY...
ARCADIA... AND WINSTON-SALEM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THE HEAVY RAIN WILL CAUSE FLASH FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD
WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS
RISING.
&&
LAT...LON 3585 8039 3589 8042 3590 8039 3589 8037
3596 8038 3599 8043 3601 8042 3606 8047
3605 8048 3612 8047 3614 8044 3626 8046
3626 8004 3626 8003 3566 8006 3568 8034
3572 8033 3573 8045 3584 8049
$$
BADGETT112
WGUS72 KRAH 090339
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1139 PM EDT FRI JUL 8 2011
NCC057-067-090430-
/O.CON.KRAH.FF.W.0022.000000T0000Z-110709T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON NC-FORSYTH NC-
1139 PM EDT FRI JUL 8 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR
FORSYTH AND DAVIDSON COUNTIES...
AT 1135 PM EDT...THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUE TO
AFFECT DAVIDSON COUNTY. NUMEROUS THUNDERSTORMS HAVE PRODUCED LOCALLY
UP TO 5 INCHES OF RAIN THUS FAR. AN ADDITIONAL INCH MAY FALL BEFORE
THE RAIN TAPERS OFF.
SEVERAL ROADS HAVE BEEN FLOODED AND AT LEAST ONE ROAD CLOSED AT
GRIFFITH AND WEST CLEMMONSVILLE IN WINSTON-SALEM DUE TO FLOODING.
LOCATIONS THREATENED BY FLOODING INCLUDE BUT ARE NOT LIMITED TO
RURAL DAVIDSON AND FORSYTH COUNTIES INCLUDING US-52 AND INTERSTATE
85 THROUGH THE REGION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DANGEROUS FLASH FLOODING IS OCCURRING ACROSS THE AREA.
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.
&&
LAT...LON 3585 8039 3589 8042 3590 8039 3589 8037
3596 8038 3599 8043 3601 8042 3606 8047
3605 8048 3612 8047 3614 8044 3626 8046
3626 8004 3626 8003 3566 8006 3568 8034
3572 8033 3573 8045 3584 8049
$$
BADGETTThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 8:28 PM EDT | Areal Flood Advisory | RAH | Durham, Orange | 52 min |
| Jul 8, 8:31 PM EDT | Special Weather Statement | RAH | Durham, Orange | 59 min |
| Jul 8, 8:40 PM EDT | Special Weather Statement | RAH | Davidson, Forsyth, Guilford | 80 min |
| Jul 8, 9:05 PM EDT | Areal Flood Advisory | RAH | Davidson, Forsyth, Guilford, Randolph | 3 hr |
| Jul 8, 9:25 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth | 65 min |
| Jul 8, 9:28 PM EDT | Severe Thunderstorm Warning | RAH | Guilford, Randolph | 60 min |
| Jul 8, 9:37 PM EDT | Flash Flood Warning | RAH | Guilford, Randolph | 3 hr |
| Jul 9, 12:19 AM EDT | Flash Flood Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 3 hr |
| Jul 9, 5:16 PM EDT | Special Weather Statement | RAH | Scotland | 59 min |
Nearby
Flash Flood Warnings in North Carolina, 2011Every 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.