Alert archive / Virginia / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 214
The Storm Prediction Center issued this severe thunderstorm watch at Apr 26, 2011, 2:09 PM EDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2011, 2:09 PM EDT (18:09 UTC)
- Expired
- Apr 26, 2011, 9:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 107 counties
Allegany County, MD, Washington County, MD, Caswell County, NC, Rockingham County, NC, Stokes County, NC, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Harrisonburg, 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, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Dickenson County, VA, Floyd County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Smyth County, VA, Tazewell County, VA, Warren County, VA, Wythe County, VA, Barbour County, WV, Berkeley County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Jefferson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mineral County, WV, Mingo County, WV, Monroe County, WV, Morgan County, WV, Nicholas County, WV, Pendleton County, WV, Pleasants County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 108 km from the middle of the area, began a volume at 18:09 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 2:14 PM EDT | Severe Thunderstorm Warning | RLX | Pleasants, Ritchie, Tyler, Wood | 46 min |
| Apr 26, 2:30 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington | 60 min |
| Apr 26, 4:11 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax | 49 min |
| Apr 26, 5:02 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Grayson | 43 min |
| Apr 26, 5:29 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Nelson | 46 min |
| Apr 26, 5:29 PM EDT | Severe Thunderstorm Warning | RNK | Amherst | 21 min |
| Apr 26, 6:29 PM EDT | Severe Thunderstorm Warning | RLX | Randolph | 46 min |
| Apr 26, 6:31 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Patrick | 44 min |
| Apr 26, 6:36 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Culpeper, Greene, Madison, Orange, City of Charlottesville | 39 min |
| Apr 26, 6:43 PM EDT | Severe Thunderstorm Warning | RNK | Campbell, Pittsylvania, City of Lynchburg | 47 min |
| Apr 26, 6:56 PM EDT | Severe Thunderstorm Warning | RNK | Franklin, Patrick | 49 min |
| Apr 26, 7:04 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Appomattox, Buckingham, Campbell, City of Lynchburg | 41 min |
| Apr 26, 7:08 PM EDT | Tornado Warning | RNK | Franklin | 29 min |
| Apr 26, 7:19 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Nelson | 26 min |
| Apr 26, 7:50 PM EDT | Severe Thunderstorm Warning | RLX | Pocahontas, Randolph | 40 min |
| Apr 26, 7:51 PM EDT | Severe Thunderstorm Warning | LWX | Highland | 39 min |
| Apr 26, 7:56 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, City of Charlottesville | 49 min |
| Apr 26, 8:01 PM EDT | Severe Thunderstorm Warning | LWX | Grant, Hardy, Pendleton | 44 min |
| Apr 26, 8:45 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Rockingham, Shenandoah | 45 min |
| Apr 26, 8:50 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 22 min |
| Apr 26, 8:52 PM EDT | Tornado Warning | LWX | Allegany | 19 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 6.2 hours before the alert went out and 162 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
- 106 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:34 PM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 9 more | 116 min |
| Apr 26, 12:05 AM EDT | Mesoscale Discussion | SPC | Ballard, Butler, Caldwell, Calloway, Carlisle, Christian and 19 more | 115 min |
| Apr 26, 12:42 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Barren, Breckinridge, Butler, Caldwell, Calloway and 19 more | 7 hr |
| Apr 26, 3:04 AM EDT | Mesoscale Discussion | SPC | Allen, Barren, Breckinridge, Edmonson, Grayson, Hardin and 5 more | 56 min |
| Apr 26, 1:49 PM EDT | Mesoscale Discussion | SPC | Martin | 56 min |
| Apr 26, 3:41 PM EDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Fulton, Graves, Hickman and 2 more | 94 min |
| Apr 26, 4:02 PM EDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 7 hr |
| Apr 26, 5:38 PM EDT | Mesoscale Discussion | SPC | Breckinridge, Bullitt, Hancock, Henderson, Jefferson, Meade and 2 more | 37 min |
| Apr 26, 5:50 PM EDT | Tornado Watch | SPC | Allen, Anderson, Barren, Breckinridge, Bullitt, Butler and 25 more | 5 hr |
| Apr 26, 7:17 PM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 118 min |
| Apr 26, 1:18 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 57 min |
| Apr 26, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | Garrett | 7 hr |
| Apr 26, 4:34 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 56 min |
| Apr 26, 7:44 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 61 min |
| Apr 26, 2:16 PM EDT | Mesoscale Discussion | SPC | Anson, Beaufort, Bertie, Bladen, Camden, Chatham and 43 more | 59 min |
| Apr 26, 1:26 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Darke, Defiance, Fulton, Hancock and 11 more | 94 min |
| Apr 26, 3:02 PM EDT | Tornado Watch | SPC | Allen, Defiance, Fulton, Hancock, Henry, Lucas and 5 more | 7 hr |
| Apr 26, 11:51 AM EDT | Mesoscale Discussion | SPC | Fayette, Haywood, Lauderdale, Shelby, Tipton | 54 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2011Severe Thunderstorm Watches in West Virginia, 2011Severe Thunderstorm Watches in North Carolina, 2011Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.