Alert archive / North Carolina / Flash Flood Warnings in 2011
Flash Flood Warning 10, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Jun 11, 2011, 5:40 PM EDT for Guilford County, North Carolina. It was in force for 2 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
- Jun 11, 2011, 5:40 PM EDT (21:40 UTC)
- Expired
- Jun 11, 2011, 7:45 PM EDT
- In force
- 2 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
County Guilford County, NC
The radar
The Roanoke radar (KFCX), 116 km from the middle of the area, began a volume at 21:42 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 |
|---|---|---|---|
| Jun 11, 5:50 PM EDT | FLASH FLOOD | Greensboro, NC | WIDESPREAD FLASH FLOODING IN EAST GREENSBORO. AT LEAST 15 WATER RESCUES UNDERWAY. A COUPLE OF APARTMENT COMPLEXES ALSO BEING EVACUATED. |
| Jun 11, 6:45 PM EDT | FLASH FLOOD | Greensboro, NC | ENDING OF FLASH FLOODING IN GREENSBORO. EMERGENCY MANAGEMENT REPORTED URBAN FLOODING ABATED AROUND THIS TIME. |
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, 9.7 hours before the alert went out and 16 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
- 574 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1033 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
542
WGUS52 KRAH 112140
FFWRAH
NCC081-112345-
/O.NEW.KRAH.FF.W.0010.110611T2140Z-110611T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
540 PM EDT SAT JUN 11 2011
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* FLASH FLOOD WARNING FOR...
GUILFORD COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 745 PM EDT
* AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER GUILFORD
COUNTY. DOPPLER RADAR ESTIMATED THAT AROUND TWO INCHES OF RAIN HAS
FALLEN QUICKLY IN PARTS OF GREENSBORO NEAR THE DOWNTOWN. ANOTHER
TWO INCHES IS POSSIBLE QUICKLY BETWEEN 545 PM AND 630 PM.
* LOCATIONS THREATENED WITH FLOODING INCLUDE MCLEANSVILLE...HIGH
POINT AND GREENSBORO.
A REPORT FROM A SPOTTER NOTED THAT SOME WATER WAS STARTED TO
THREATEN A RESIDENCE OR TWO IN GREENSBORO.
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 7954 3590 7954 3590 7964 3592 8004
3626 8003
$$
DJF2 follow-up statements
195
WGUS72 KRAH 112211
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
611 PM EDT SAT JUN 11 2011
NCC081-112345-
/O.CON.KRAH.FF.W.0010.000000T0000Z-110611T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUILFORD NC-
611 PM EDT SAT JUN 11 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
GUILFORD COUNTY...
AT 606 PM EDT...LOCAL EMERGENCY MANAGEMENT REPORTED THUNDERSTORMS
WITH VERY HEAVY RAIN PRODUCING FLASH FLOODING OVER GUILFORD COUNTY.
AN ESTIMATED FIFTEEN WATER RESCUES HAD OCCURRED FROM PERSONS
STRANDED IN HIGH WATER IN GREENSBORO...AND A COUPLE OF APARTMENT
COMPLEXES WERE BEING EVACUATED DUE TO RISING WATER. DOPPLER RADAR
ESTIMATED THAT THREE TO POSSIBLY FOUR INCHES OF RAIN LIKELY HAD
OCCURRED ON THE EAST SIDE OF GREENSBORO...AND TOWARD
MCLEANSVILLE...BETWEEN 5 PM AND 6 PM.
AN ADDITIONAL INCH OF RAIN MAY OCCUR BETWEEN 615 PM AND 7 PM. THE
DANGERS OF FLASH FLOODING WILL CONTINUE EARLY THIS EVENING AT LEAST
THROUGH 730 PM. AGAIN...LOCATIONS THREATENED BY FLOODING INCLUDE BUT
ARE NOT LIMITED TO MCLEANSVILLE AND GREENSBORO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WAS CAUSING FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO
NOT DRIVE WHERE WATER COVERS THE ROAD. AVOID STREAMS AND DITCHES
RUNNING HIGH AND FLOWING FAST.
&&
LAT...LON 3625 7954 3590 7954 3590 7964 3592 8004
3626 8003
$$
DJF134
WGUS72 KRAH 112343
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
743 PM EDT SAT JUN 11 2011
NCC081-112350-
/O.EXP.KRAH.FF.W.0010.000000T0000Z-110611T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUILFORD NC-
743 PM EDT SAT JUN 11 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM EDT FOR GUILFORD
COUNTY...
AT 737 PM EDT...GUILFORD COUNTY EMERGENCY MANAGEMENT REPORTED THAT
FLASH FLOODING HAD ABATED IN THE CITY OF GREENSBORO. IN ADDITION...
OBSERVATIONS FROM CREEKS RUNNING HIGH...SUCH AS NORTH BUFFALO
CREEK...SHOWED RISES SLOWING BELOW THE LOCAL FLOOD STAGE. WHILE
SCATTERED SHOWERS AND POSSIBLY A THUNDERSTORM OR TWO ARE STILL
POSSIBLE THIS EVENING...FLASH FLOODING IS NO LONGER EXPECTED. AS A
RESULT...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION.
LAT...LON 3625 7954 3590 7954 3590 7964 3592 8004
3626 8003
$$
DJFThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 8:45 PM EDT | Special Weather Statement | RAH | Durham | 45 min |
| Jun 10, 8:54 PM EDT | Special Weather Statement | RAH | Randolph | 66 min |
| Jun 10, 9:07 PM EDT | Special Weather Statement | RAH | Johnston | 38 min |
| Jun 10, 9:09 PM EDT | Special Weather Statement | RAH | Randolph | 66 min |
| Jun 10, 9:40 PM EDT | Special Weather Statement | RAH | Franklin | 80 min |
| Jun 10, 9:51 PM EDT | Areal Flood Advisory | RAH | Edgecombe, Johnston, Wilson | 3 hr |
| Jun 10, 10:01 PM EDT | Areal Flood Advisory | RAH | Durham, Franklin, Granville, Wake | 3 hr |
| Jun 10, 10:45 PM EDT | Special Weather Statement | RAH | Durham | 60 min |
| Jun 10, 10:50 PM EDT | Special Weather Statement | RAH | Moore | 55 min |
| Jun 10, 11:08 PM EDT | Special Weather Statement | RAH | Lee | 67 min |
| Jun 10, 11:26 PM EDT | Special Weather Statement | RAH | Wake | 64 min |
| Jun 10, 11:41 PM EDT | Special Weather Statement | RAH | Lee | 64 min |
| Jun 11, 2:34 PM EDT | Special Weather Statement | RAH | Davidson | 41 min |
| Jun 11, 3:12 PM EDT | Special Weather Statement | RAH | Davidson | 48 min |
| Jun 11, 3:26 PM EDT | Special Weather Statement | RAH | Montgomery | 49 min |
| Jun 11, 3:38 PM EDT | Special Weather Statement | RAH | Forsyth | 112 min |
| Jun 11, 3:58 PM EDT | Special Weather Statement | RAH | Montgomery, Stanly | 62 min |
| Jun 11, 4:09 PM EDT | Severe Thunderstorm Warning | RAH | Montgomery, Stanly | 51 min |
| Jun 11, 4:34 PM EDT | Special Weather Statement | RAH | Davidson | 56 min |
| Jun 11, 4:36 PM EDT | Special Weather Statement | RAH | Forsyth | 54 min |
| Jun 11, 5:06 PM EDT | Special Weather Statement | RAH | Montgomery | 54 min |
| Jun 11, 5:21 PM EDT | Severe Thunderstorm Warning | RAH | Guilford | 38 min |
| Jun 11, 5:29 PM EDT | Areal Flood Advisory | RAH | Guilford | 2 hr |
| Jun 11, 5:45 PM EDT | Special Weather Statement | RAH | Moore | 60 min |
| Jun 11, 5:53 PM EDT | Special Weather Statement | RAH | Alamance | 52 min |
| Jun 11, 5:55 PM EDT | Areal Flood Advisory | RAH | Alamance, Orange, Person | 3 hr |
| Jun 11, 6:15 PM EDT | Special Weather Statement | RAH | Person | 60 min |
| Jun 11, 6:17 PM EDT | Special Weather Statement | RAH | Durham, Orange | 58 min |
| Jun 11, 6:25 PM EDT | Areal Flood Advisory | RAH | Moore | 48 min |
| Jun 11, 6:35 PM EDT | Special Weather Statement | RAH | Granville | 55 min |
| Jun 11, 6:39 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Orange | 39 min |
| Jun 11, 6:42 PM EDT | Severe Thunderstorm Warning | RAH | Chatham | 42 min |
| Jun 11, 6:45 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Granville, Person | 45 min |
| Jun 11, 6:59 PM EDT | Special Weather Statement | RAH | Wake | 61 min |
| Jun 11, 7:21 PM EDT | Special Weather Statement | RAH | Vance | 54 min |
| Jun 11, 7:34 PM EDT | Special Weather Statement | RAH | Franklin | 56 min |
| Jun 11, 7:45 PM EDT | Special Weather Statement | RAH | Warren | 60 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.