Alert archive / West Virginia / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 333
The Storm Prediction Center issued this severe thunderstorm watch at May 22, 2011, 5:40 PM EDT for 5 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 22, 2011, 5:40 PM EDT (21:40 UTC)
- Expired
- May 22, 2011, 11:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 79 counties
Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Wilkes County, NC, Yancey County, NC, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Morgan County, OH, Perry County, OH, Vinton County, OH, Washington County, OH, Bland County, VA, Buchanan County, VA, Carroll County, VA, City of Galax, VA, Dickenson County, VA, Giles County, VA, Grayson County, VA, Pulaski County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Pleasants County, WV, Putnam County, WV, Raleigh County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Tyler County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 72 km from the middle of the area, began a volume at 21:41 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
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 5:49 PM EDT | Severe Thunderstorm Warning | RLX | Lawrence | 56 min |
| May 22, 5:52 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Gallia, Jackson, Meigs, Vinton, Washington | 53 min |
| May 22, 6:03 PM EDT | Severe Thunderstorm Warning | RLX | Boyd, Carter, Greenup, Lawrence | 57 min |
| May 22, 6:03 PM EDT | Severe Thunderstorm Warning | GSP | Buncombe, Madison, Yancey | 57 min |
| May 22, 6:11 PM EDT | Severe Thunderstorm Warning | RNK | Ashe, Watauga | 49 min |
| May 22, 6:13 PM EDT | Severe Thunderstorm Warning | GSP | Buncombe, Madison | 62 min |
| May 22, 6:19 PM EDT | Severe Thunderstorm Warning | RLX | Lawrence | 26 min |
| May 22, 6:46 PM EDT | Severe Thunderstorm Warning | GSP | Avery, Caldwell | 44 min |
| May 22, 6:47 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Ashe | 43 min |
| May 22, 6:56 PM EDT | Severe Thunderstorm Warning | RNK | Ashe, Watauga, Wilkes | 64 min |
| May 22, 7:02 PM EDT | Severe Thunderstorm Warning | GSP | Buncombe, Madison, Yancey | 58 min |
| May 22, 7:04 PM EDT | Severe Thunderstorm Warning | RLX | Boone, Fayette, Kanawha, Lincoln, Logan, Raleigh and 2 more | 56 min |
| May 22, 7:08 PM EDT | Severe Thunderstorm Warning | RLX | Gallia, Jackson, Lawrence, Vinton | 37 min |
| May 22, 7:29 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Jackson, Vinton | 31 min |
| May 22, 7:41 PM EDT | Severe Thunderstorm Warning | GSP | Henderson, Transylvania | 43 min |
| May 22, 7:44 PM EDT | Severe Thunderstorm Warning | RNK | Carroll, Pulaski, Wythe | 61 min |
| May 22, 7:47 PM EDT | Severe Thunderstorm Warning | GSP | Burke, McDowell, Yancey | 58 min |
| May 22, 8:02 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Ashe | 58 min |
| May 22, 8:17 PM EDT | Flash Flood Warning | RNK | Ashe, Watauga, Wilkes | 4 hr |
| May 22, 8:20 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Burke, Caldwell, Catawba | 55 min |
| May 22, 8:20 PM EDT | Severe Thunderstorm Warning | RNK | Craig, Giles, Montgomery, Pulaski, City of Radford | 55 min |
| May 22, 8:28 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Pulaski, Smyth, Tazewell, Wythe | 32 min |
| May 22, 8:33 PM EDT | Flash Flood Warning | RNK | Ashe | 4 hr |
| May 22, 8:48 PM EDT | Flash Flood Warning | RNK | Bland, Craig, Giles, Montgomery, Pulaski | 4 hr |
| May 22, 8:54 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Burke, Caldwell, Catawba, Iredell | 66 min |
| May 22, 9:11 PM EDT | Severe Thunderstorm Warning | RNK | Botetourt, Craig, Giles, Montgomery, Pulaski, Roanoke and 3 more | 64 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, 9.7 hours before the alert went out and 222 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
- 130 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:55 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 64 more | 65 min |
| May 22, 2:18 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 76 more | 7 hr |
| May 22, 2:51 PM EDT | Mesoscale Discussion | SPC | Boone, Boyd, Bracken, Campbell, Carroll, Carter and 8 more | 54 min |
| May 22, 4:44 PM EDT | Mesoscale Discussion | SPC | Bath, Bell, Bourbon, Boyd, Bracken, Breathitt and 44 more | 61 min |
| May 22, 7:26 PM EDT | Mesoscale Discussion | SPC | Boyd, Carter, Elliott, Floyd, Greenup, Johnson and 4 more | 2 hr |
| May 22, 3:15 PM EDT | Mesoscale Discussion | SPC | Fulton, Lucas, Williams | 60 min |
| May 22, 6:18 AM EDT | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Hardeman, Haywood, Lake and 3 more | 57 min |
| May 22, 8:03 AM EDT | Severe Thunderstorm Watch | SPC | Chester, Crockett, Decatur, Fayette, Hardeman, Hardin and 7 more | 7 hr |
| May 22, 2:09 PM EDT | Mesoscale Discussion | SPC | Chester, Fayette, Hardeman, Hardin, Haywood, McNairy and 3 more | 66 min |
Nearby
Severe Thunderstorm Watches in West Virginia, 2011Severe Thunderstorm Watches in North Carolina, 2011Severe Thunderstorm Watches in Virginia, 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.