Alert archive / Virginia / Flash Flood Watches in 2013
Flash Flood Watch 10, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood watch at Jul 11, 2013, 4:48 AM EDT for 33 counties in Virginia; 9 counties in North Carolina. It took effect at Jul 11, 2013, 10:00 AM EDT. It was in force for 39 hr.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2013, 4:48 AM EDT (08:48 UTC)
- In effect from
- Jul 11, 2013, 10:00 AM EDT
- Expired
- Jul 13, 2013, 12:37 AM EDT
- In force
- 39 hr
- Issued by
- NWS Blacksburg, VA
- Flood severity
- None
All 42 counties
Alleghany County, NC, Ashe County, NC, Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Grayson County, VA, Halifax County, VA, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Wythe County, VA
The radar
The Roanoke radar (KFCX), 19 km from the middle of the area, began a volume at 08:51 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
Roanoke, VA (KRNK), launched 00:00Z, 8.8 hours before the alert went out and 55 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
- 335 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Blacksburg, VA wrote its last area forecast discussion before this flash flood watch went out at Jul 11, 2:08 AM EDT, 2 hours 40 minutes earlier.
Area forecast discussion, Jul 11, 2:08 AM EDT, 2 hours 40 minutes before
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</html>Hazardous weather outlook, Jul 10, 3:32 PM EDT, 13 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BLACKSBURG VA 332 PM EDT WED JUL 10 2013 NCZ004>006-020-VAZ033>035-043>047-058-059-111945- STOKES-ROCKINGHAM-CASWELL-YADKIN-FRANKLIN-BEDFORD-AMHERST-HENRY- PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE- 332 PM EDT WED JUL 10 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH CAROLINA...NORTHWEST NORTH CAROLINA...CENTRAL VIRGINIA...SOUTH CENTRAL VIRGINIA AND WEST CENTRAL VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. A FEW SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT. THE MAIN THREAT WILL BE DAMAGING DOWNBURST WINDS. LOCALIZED FLOODING AND FLASH FLOODING WILL ALSO BE POSSIBLE WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THURSDAY... MAINLY ACROSS THE PIEDMONT AREA OF SOUTH CENTRAL VIRGINIA AND NORTH CENTRAL NORTH CAROLINA. HEAVY RAIN WILL BE POSSIBLE THURSDAY...WITH LOCALIZED FLOODING OR FLASH FLOODING POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. NCZ001>003-018-019-VAZ007-009>020-022>024-032-WVZ042>045-111945- ASHE-ALLEGHANY NC-SURRY-WATAUGA-WILKES-TAZEWELL-SMYTH-BLAND-GILES- WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-ALLEGHANY VA- BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-MERCER-SUMMERS-MONROE- GREENBRIER- 332 PM EDT WED JUL 10 2013 ...FLASH FLOOD WATCH IN EFFECT UNTIL 2 AM EDT THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH CAROLINA...NORTHWEST NORTH CAROLINA...SOUTHWEST VIRGINIA...WEST CENTRAL VIRGINIA AND SOUTHEAST WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. A FEW SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND TONIGHT. THE MAIN THREAT WILL BE DAMAGING DOWNBURST WINDS. FLASH FLOODING IS LIKELY WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THURSDAY... MAINLY ACROSS THE PIEDMONT AREA OF SOUTH CENTRAL VIRGINIA AND NORTH CENTRAL NORTH CAROLINA. HEAVY RAIN WILL BE POSSIBLE THURSDAY...WITH LOCALIZED FLOODING OR FLASH FLOODING POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
In the hours before
Special weather statement, Jul 10, 10:52 PM EDT, 5 hours 56 minutes before
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</html>Local storm report, Jul 10, 11:49 PM EDT, 4 hours 59 minutes before
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</html>Local storm report, Jul 11, 1:19 AM EDT, 3 hours 29 minutes before
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</html>The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 8:01 PM EDT | Special Weather Statement | RNK | Pittsylvania | 29 min |
| Jul 10, 8:12 PM EDT | Special Weather Statement | RNK | Charlotte | 18 min |
| Jul 10, 8:32 PM EDT | Special Weather Statement | RNK | Pittsylvania | 28 min |
| Jul 10, 9:02 PM EDT | Special Weather Statement | RNK | Halifax | 28 min |
| Jul 10, 9:27 PM EDT | Special Weather Statement | RNK | Charlotte, Halifax | 48 min |
| Jul 10, 9:29 PM EDT | Special Weather Statement | RNK | City of Danville | 46 min |
| Jul 10, 10:02 PM EDT | Special Weather Statement | RNK | Halifax | 28 min |
| Jul 10, 10:04 PM EDT | Special Weather Statement | RNK | Charlotte | 26 min |
| Jul 10, 10:23 PM EDT | Special Weather Statement | RNK | Halifax | 52 min |
| Jul 10, 10:32 PM EDT | Special Weather Statement | RNK | Halifax | 58 min |
| Jul 10, 10:52 PM EDT | Special Weather Statement | RNK | Charlotte | 23 min |
| Jul 10, 11:54 PM EDT | Areal Flood Advisory | RNK | Pulaski | 3 hr |
| Jul 11, 10:00 AM EDT | Special Weather Statement | RNK | Halifax | 60 min |
| Jul 11, 3:11 PM EDT | Areal Flood Advisory | RNK | Carroll, Grayson, City of Galax | 3 hr |
| Jul 11, 3:26 PM EDT | Areal Flood Advisory | RNK | Appomattox | 3 hr |
| Jul 11, 3:28 PM EDT | Areal Flood Advisory | RNK | Pittsylvania | 3 hr |
| Jul 11, 3:28 PM EDT | Special Weather Statement | RNK | Pittsylvania | 32 min |
| Jul 11, 3:31 PM EDT | Areal Flood Advisory | RNK | Buckingham | 3 hr |
| Jul 11, 3:40 PM EDT | Special Weather Statement | RNK | Patrick | 35 min |
| Jul 11, 4:00 PM EDT | Areal Flood Advisory | RNK | Patrick | 3 hr |
| Jul 11, 4:10 PM EDT | Special Weather Statement | RNK | Appomattox, Buckingham | 35 min |
| Jul 11, 4:53 PM EDT | Areal Flood Advisory | RNK | Appomattox, Campbell | 3 hr |
| Jul 11, 4:57 PM EDT | Special Weather Statement | RNK | Henry | 33 min |
| Jul 11, 5:16 PM EDT | Special Weather Statement | RNK | Amherst | 29 min |
| Jul 11, 5:33 PM EDT | Flash Flood Warning | RNK | Appomattox, Campbell, City of Lynchburg | 3 hr |
| Jul 11, 5:50 PM EDT | Areal Flood Advisory | RNK | Rockbridge | 3 hr |
| Jul 11, 6:24 PM EDT | Special Weather Statement | RNK | City of Buena Vista | 36 min |
| Jul 11, 6:39 PM EDT | Areal Flood Advisory | RNK | Amherst, Rockbridge | 3 hr |
| Jul 11, 7:26 PM EDT | Flash Flood Warning | RNK | Amherst, Rockbridge | 4 hr |
| Jul 11, 7:39 PM EDT | Special Weather Statement | RNK | Pittsylvania | 36 min |
| Jul 11, 7:47 PM EDT | Areal Flood Advisory | RNK | Halifax, Pittsylvania | 17 hr |
| Jul 10, 9:01 PM EDT | Special Weather Statement | RNK | Caswell | 29 min |
| Jul 10, 9:08 PM EDT | Special Weather Statement | RNK | Caswell | 22 min |
| Jul 10, 10:37 PM EDT | Areal Flood Advisory | RNK | Caswell | 3 hr |
| Jul 11, 4:24 PM EDT | Special Weather Statement | RNK | Stokes | 36 min |
| Jul 11, 4:33 PM EDT | Special Weather Statement | RNK | Surry | 27 min |
| Jul 11, 5:11 PM EDT | Special Weather Statement | RNK | Surry | 34 min |
| Jul 11, 5:12 PM EDT | Special Weather Statement | RNK | Stokes | 33 min |
| Jul 11, 5:34 PM EDT | Special Weather Statement | RNK | Rockingham | 26 min |
| Jul 11, 5:55 PM EDT | Special Weather Statement | RNK | Yadkin | 35 min |
| Jul 11, 6:15 PM EDT | Special Weather Statement | RNK | Yadkin | 30 min |
| Jul 11, 6:21 PM EDT | Special Weather Statement | RNK | Rockingham | 24 min |
| Jul 11, 6:32 PM EDT | Special Weather Statement | RNK | Yadkin | 28 min |
| Jul 11, 6:47 PM EDT | Special Weather Statement | RNK | Yadkin | 28 min |
| Jul 11, 7:13 PM EDT | Special Weather Statement | RNK | Yadkin | 32 min |
| Jul 10, 9:20 PM EDT | Special Weather Statement | RNK | Greenbrier | 25 min |
| Jul 10, 9:21 PM EDT | Special Weather Statement | RNK | Summers | 24 min |
| Jul 10, 9:46 PM EDT | Special Weather Statement | RNK | Summers | 44 min |
| Jul 10, 10:36 PM EDT | Special Weather Statement | RNK | Greenbrier | 54 min |
Nearby
Flash Flood Watches in Virginia, 2013Flash Flood Watches in North Carolina, 2013Every flash flood watch in 2013
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.