Alert archive / Virginia / Flash Flood Warnings in 2011
Flash Flood Warning 13, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood warning at Apr 28, 2011, 3:22 AM EDT for 8 counties in Virginia. It was in force for 4 hr. 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
- Apr 28, 2011, 3:22 AM EDT (07:22 UTC)
- Expired
- Apr 28, 2011, 7:37 AM EDT
- In force
- 4 hr
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Alleghany County, VA, Botetourt County, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Franklin County, VA, Montgomery County, VA, Roanoke County, VA
The radar
The Roanoke radar (KFCX), 66 km from the middle of the area, began a volume at 07:22 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 |
|---|---|---|---|
| Apr 28, 3:30 AM EDT | FLASH FLOOD | Roanoke, VA | HEAVY RAIN PRODUCED STREET FLOODING ON LUCK AVENUE...FIRST AND SECOND STREETS...AND JEFFERSON AVE. 2 MANHOLE COVERS WERE FLOATED LOOSE. WATER QUICKLY RECEDED BY 400 AM. |
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 00:00Z, 7.4 hours before the alert went out and 50 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
- 372 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 226 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
618
WGUS51 KRNK 280722
FFWRNK
VAC005-023-045-067-121-161-770-775-281315-
/O.NEW.KRNK.FF.W.0013.110428T0722Z-110428T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
322 AM EDT THU APR 28 2011
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* FLASH FLOOD WARNING FOR...
ROANOKE COUNTY IN WEST CENTRAL VIRGINIA
CITY OF ROANOKE IN WEST CENTRAL VIRGINIA
CITY OF SALEM IN WEST CENTRAL VIRGINIA
NORTHWESTERN FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA
EASTERN CRAIG COUNTY IN SOUTHWEST VIRGINIA
BOTETOURT COUNTY IN WEST CENTRAL VIRGINIA
EAST CENTRAL ALLEGHANY COUNTY IN WEST CENTRAL VIRGINIA
MONTGOMERY COUNTY IN SOUTHWEST VIRGINIA
* UNTIL 915 AM EDT.
* AT 313 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A CLUSTER OF THUNDERSTORMS OVER THE WARNED
AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROANOKE
MOUNTAIN...HOLLINS...LONGDALE FURNACE...IRON GATE...VINTON...
ROANOKE AIRPORT...POAGES MILL...GLENVAR...CAVE SPRING...CATAWBA...
BRADSHAW...TROUTVILLE...SPRINGWOOD...ORISKANY...NACE...LITHIA...
LAYMANTOWN...GLEN WILTON...GALA...FINCASTLE...EAGLE ROCK...
DALEVILLE...CLOVERDALE...BLUE RIDGE...SINKING CREEK...NEW CASTLE...
ABBOTT...MERRIMAC...MC DONALDS MILL...ELLISTON-LAFAYETTE...
ELLISTON...BLACKSBURG...ROANOKE AND SALEM CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
PLEASE RELAY ANY REPORTS OF FLOODING INCLUDING MUDSLIDES...OR ROAD
CLOSURES TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
TOLL FREE...1...8 6 6...2 1 5...4 3 2 4. DELAYED REPORTS ARE WELCOME.
&&
LAT...LON 3784 7969 3786 7967 3786 7962 3774 7969
3768 7967 3746 7972 3740 7981 3738 7978
3732 7985 3714 7994 3703 8055 3708 8056
3739 8033 3788 7974
$$
JJ4 follow-up statements
300
WGUS71 KRNK 280811
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
411 AM EDT THU APR 28 2011
VAC005-023-045-067-121-161-770-775-281315-
/O.CON.KRNK.FF.W.0013.000000T0000Z-110428T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROANOKE VA-CITY OF ROANOKE VA-CITY OF SALEM VA-FRANKLIN VA-CRAIG VA-
BOTETOURT VA-ALLEGHANY VA-MONTGOMERY VA-
411 AM EDT THU APR 28 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM EDT FOR THE
CITY OF ROANOKE...THE CITY OF SALEM... MONTGOMERY...EASTERN
ALLEGHANY...BOTETOURT...EASTERN CRAIG...NORTHWESTERN FRANKLIN AND
ROANOKE COUNTIES...
AT 405 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THUNDERSTORMS WITH VERY HEAVY RAINFALL HAVE EXITED THE WARNED
AREA. HOWEVER...ADDITIONAL MODERATE TO HEAVY SHOWERS WERE MOVING
BACK IN...AND THERE IS STILL A THREAT OF SCATTERED THUNDERSTORMS
WITH VERY HEAVY RAINFALL. RADAR ESTIMATES THAT LOCALLY HEAVY
RAINFALL OF 1.5 TO 2.0 INCHES HAS FALLEN IN PARTS OF THE WARNED
AREA. THE HEAVY RAIN CAUSED STREET FLOODING IN THE CITY OF ROANOKE
EARLIER...BUT THE WATER HAS ALREADY RECEDED. ANY ADDITIONAL HEAVY
RAINFALL WOULD LIKELY CAUSE FLOODING ADDITIONAL URBAN FLOODING...AND
FLOODING ON CREEKS AND SMALL STREAMS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LONGDALE
FURNACE...IRON GATE...SPRINGWOOD...ORISKANY...GLEN WILTON...GALA AND
EAGLE ROCK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM EDT THURSDAY MORNING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.
&&
LAT...LON 3784 7969 3786 7967 3786 7962 3774 7969
3768 7967 3746 7972 3740 7981 3738 7978
3732 7985 3714 7994 3703 8055 3708 8056
3739 8033 3788 7974
$$
JJ650
WGUS71 KRNK 280911
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
511 AM EDT THU APR 28 2011
VAC005-023-045-067-121-161-770-775-281315-
/O.CON.KRNK.FF.W.0013.000000T0000Z-110428T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROANOKE VA-CITY OF ROANOKE VA-CITY OF SALEM VA-FRANKLIN VA-CRAIG VA-
BOTETOURT VA-ALLEGHANY VA-MONTGOMERY VA-
511 AM EDT THU APR 28 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM EDT FOR THE
CITY OF ROANOKE...THE CITY OF SALEM... MONTGOMERY...EASTERN
ALLEGHANY...BOTETOURT...EASTERN CRAIG...NORTHWESTERN FRANKLIN AND
ROANOKE COUNTIES...
AT 504 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ADDITIONAL SCATTERED THUNDERSTORMS WITH HEAVY RAIN MOVING BACK INTO
THE WARNED AREA. RADAR ESTIMATES THESE STORMS MAY BRING A QUICK
INCH OF RAIN IN LESS THAN AN HOUR. THIS ADDITIONAL HEAVY RAIN MAY
CAUSE LOCALIZED FLASH FLOODING.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LONGDALE
FURNACE...IRON GATE...SPRINGWOOD...ORISKANY...GLEN WILTON...GALA AND
EAGLE ROCK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM EDT THURSDAY MORNING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.
&&
LAT...LON 3784 7969 3786 7967 3786 7962 3774 7969
3768 7967 3746 7972 3740 7981 3738 7978
3732 7985 3714 7994 3703 8055 3708 8056
3739 8033 3788 7974
$$
JJ282
WGUS71 KRNK 280949
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
549 AM EDT THU APR 28 2011
VAC005-023-045-067-121-161-770-775-281315-
/O.CON.KRNK.FF.W.0013.000000T0000Z-110428T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROANOKE VA-CITY OF ROANOKE VA-CITY OF SALEM VA-FRANKLIN VA-CRAIG VA-
BOTETOURT VA-ALLEGHANY VA-MONTGOMERY VA-
549 AM EDT THU APR 28 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM EDT FOR THE
CITY OF ROANOKE...THE CITY OF SALEM... MONTGOMERY...EASTERN
ALLEGHANY...BOTETOURT...EASTERN CRAIG...NORTHWESTERN FRANKLIN AND
ROANOKE COUNTIES...
AT 536 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN HAD RE-DEVELOPED
ACROSS SOUTHEAST MONTGOMERY COUNTY...AND WAS MOVING INTO ROANOKE
COUNTY AND THE CITIES OF SALEM AND ROANOKE. RAINFALL RATES FROM THIS
LINE WERE UP TO 3.5 INCHES AN HOUR. THIS ADDITIONAL HEAVY RAIN IS
EXPECTED TO CAUSE FLASH FLOODING ALONG CREEKS AND STREAMS...AND IN
FLOOD PRONE URBAN AREAS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LONGDALE
FURNACE...IRON GATE...SPRINGWOOD...ORISKANY...GLEN WILTON...GALA AND
EAGLE ROCK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM EDT THURSDAY MORNING
FOR NORTHWESTERN NORTH CAROLINA AND SOUTHWESTERN VIRGINIA AND
SOUTHEAST WEST VIRGINIA.
&&
LAT...LON 3784 7969 3786 7967 3786 7962 3774 7969
3768 7967 3746 7972 3740 7981 3738 7978
3732 7985 3714 7994 3703 8055 3708 8056
3739 8033 3788 7974
$$
JJ726
WGUS71 KRNK 281137
FFSRNK
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
737 AM EDT THU APR 28 2011
VAC005-023-045-067-121-161-770-775-281145-
/O.CAN.KRNK.FF.W.0013.000000T0000Z-110428T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROANOKE VA-CITY OF ROANOKE VA-CITY OF SALEM VA-FRANKLIN VA-CRAIG VA-
BOTETOURT VA-ALLEGHANY VA-MONTGOMERY VA-
737 AM EDT THU APR 28 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR THE CITY OF
ROANOKE...THE CITY OF SALEM...MONTGOMERY...EASTERN ALLEGHANY...
BOTETOURT...EASTERN CRAIG...NORTHWESTERN FRANKLIN AND ROANOKE
COUNTIES...
NATIONAL WEATHER SERVICE RADAR INDICATES THAT HEAVY RAIN HAS EXITED
THE WARNED AREA. THERE HAVE BEEN NO REPORTS OF FLOODING. ANY HIGH
WATER IN THE WARNED AREA SHOULD BE RECEDING...THUS THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 3784 7969 3786 7967 3786 7962 3774 7969
3768 7967 3746 7972 3740 7981 3738 7978
3732 7985 3714 7994 3703 8055 3708 8056
3739 8033 3788 7974
$$
JJThe office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 8:01 PM EDT | Tornado Warning | RNK | Halifax, Pittsylvania, City of Danville | 44 min |
| Apr 27, 8:09 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Buckingham, Campbell | 66 min |
| Apr 27, 8:32 PM EDT | Tornado Warning | RNK | Campbell, Charlotte, Halifax, Pittsylvania | 43 min |
| Apr 27, 8:45 PM EDT | Severe Thunderstorm Warning | RNK | Halifax, Pittsylvania, City of Danville | 45 min |
| Apr 27, 9:06 PM EDT | Flash Flood Watch | RNK | Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 21 more | 13 hr |
| Apr 27, 9:11 PM EDT | Tornado Warning | RNK | Charlotte, Halifax | 34 min |
| Apr 27, 10:12 PM EDT | Tornado Warning | RNK | Bland, Smyth, Tazewell | 48 min |
| Apr 27, 10:26 PM EDT | Tornado Warning | RNK | Bland, Smyth, Tazewell, Wythe | 49 min |
| Apr 27, 10:39 PM EDT | Flash Flood Warning | RNK | Bland, Smyth, Tazewell | 6 hr |
| Apr 27, 11:09 PM EDT | Tornado Warning | RNK | Bland, Giles, Tazewell | 51 min |
| Apr 27, 11:12 PM EDT | Tornado Warning | RNK | Bland, Grayson, Smyth, Tazewell, Wythe | 48 min |
| Apr 27, 11:19 PM EDT | Flash Flood Warning | RNK | Carroll, Giles, Grayson, Montgomery, Pulaski, Wythe and 2 more | 6 hr |
| Apr 27, 11:53 PM EDT | Tornado Warning | RNK | Bland, Giles, Montgomery, Pulaski, Tazewell, Wythe | 52 min |
| Apr 27, 11:56 PM EDT | Tornado Warning | RNK | Alleghany, City of Covington | 49 min |
| Apr 28, 12:01 AM EDT | Tornado Warning | RNK | Bland, Carroll, Grayson, Smyth, Wythe | 44 min |
| Apr 28, 12:40 AM EDT | Tornado Warning | RNK | Bath | 35 min |
| Apr 28, 12:45 AM EDT | Tornado Warning | RNK | Bland, Giles, Montgomery, Pulaski, Wythe, City of Radford | 45 min |
| Apr 28, 12:48 AM EDT | Flash Flood Warning | RNK | Alleghany, Bath, Craig, Giles, City of Covington | 6 hr |
| Apr 28, 1:03 AM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Bath, Rockbridge, City of Covington | 57 min |
| Apr 28, 1:12 AM EDT | Tornado Warning | RNK | Bland, Smyth, Tazewell, Wythe | 33 min |
| Apr 28, 1:19 AM EDT | Tornado Warning | RNK | Craig, Giles, Montgomery, Roanoke | 26 min |
| Apr 28, 1:20 AM EDT | Tornado Warning | RNK | Bland, Smyth, Tazewell, Wythe | 25 min |
| Apr 28, 1:28 AM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Botetourt, Rockbridge, City of Lexington | 21 min |
| Apr 28, 1:34 AM EDT | Tornado Warning | RNK | Alleghany, Bath, Botetourt, Rockbridge, City of Lexington | 41 min |
| Apr 28, 1:39 AM EDT | Flash Flood Warning | RNK | Bland | 3 hr |
| Apr 28, 1:43 AM EDT | Tornado Warning | RNK | Alleghany, Botetourt, Craig, Montgomery | 19 min |
| Apr 28, 1:47 AM EDT | Tornado Warning | RNK | Bland, Giles, Tazewell, Wythe | 9 min |
| Apr 28, 2:17 AM EDT | Tornado Warning | RNK | Craig, Giles | 28 min |
| Apr 28, 4:17 AM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax, Pittsylvania, City of Danville | 30 min |
| Apr 28, 5:32 AM EDT | Flash Flood Warning | RNK | Carroll, Floyd, Grayson, Montgomery, City of Galax | 3 hr |
| Apr 28, 5:51 AM EDT | Severe Thunderstorm Warning | RNK | Carroll, Floyd, Franklin, Patrick | 54 min |
| Apr 28, 6:40 AM EDT | Special Weather Statement | RNK | Amherst, Appomattox, Bedford, Buckingham, Campbell, City of Buena Vista and 1 more | 65 min |
| Apr 28, 6:46 AM EDT | Special Weather Statement | RNK | Patrick | 29 min |
| Apr 28, 6:47 AM EDT | Areal Flood Warning | RNK | Alleghany, Bath, Craig, City of Covington | 6 hr |
| Apr 28, 6:48 AM EDT | Severe Thunderstorm Warning | RNK | Carroll, Henry, Patrick | 24 min |
| Apr 28, 7:13 AM EDT | Special Weather Statement | RNK | Patrick | 32 min |
| Apr 28, 7:44 AM EDT | Special Weather Statement | RNK | Appomattox, Bedford, Buckingham, City of Lynchburg | 76 min |
| Apr 28, 7:48 AM EDT | Special Weather Statement | RNK | Campbell | 72 min |
| Apr 28, 8:09 AM EDT | Areal Flood Warning | RNK | Alleghany, Botetourt, Craig | 10 hr |
| Apr 28, 8:56 AM EDT | Special Weather Statement | RNK | Appomattox, Buckingham, Campbell, Charlotte, City of Lynchburg | 64 min |
| Apr 28, 10:06 AM EDT | Special Weather Statement | RNK | Halifax | 39 min |
| Apr 28, 12:38 PM EDT | Special Weather Statement | RNK | City of Danville | 52 min |
| Apr 28, 12:44 PM EDT | Areal Flood Warning | RNK | Bath | 6 hr |
| Apr 28, 6:33 PM EDT | Areal Flood Warning | RNK | Alleghany, Botetourt, Craig | 6 hr |
Nearby
Flash Flood Warnings in Virginia, 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.