Alert archive / Virginia / Tornado Watches in 2010
Tornado Watch 69
The Storm Prediction Center issued this tornado watch at Apr 8, 2010, 7:12 PM EDT for 18 counties in North Carolina; 24 counties in Virginia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2010, 7:12 PM EDT (23:12 UTC)
- Expired
- Apr 8, 2010, 10:31 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 42 counties
Alamance County, NC, Anson County, NC, Caswell County, NC, Chatham County, NC, Davidson County, NC, Forsyth County, NC, Guilford County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Yadkin County, NC, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Danville, VA, City of Lynchburg, VA, City of Martinsville, VA, Cumberland County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Halifax County, VA, Henry County, VA, Louisa County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA
The radar
The Roanoke radar (KFCX), 108 km from the middle of the area, began a volume at 23:13 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 7:15 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth | 35 min |
| Apr 8, 7:27 PM EDT | Tornado Warning | RNK | Appomattox, Campbell, Charlotte, Pittsylvania | 33 min |
| Apr 8, 7:44 PM EDT | Tornado Warning | RNK | Charlotte, Halifax, Pittsylvania | 46 min |
| Apr 8, 7:58 PM EDT | Severe Thunderstorm Warning | RNK | Appomattox, Buckingham, Charlotte | 19 min |
| Apr 8, 8:04 PM EDT | Severe Thunderstorm Warning | RNK | Caswell, Rockingham | 46 min |
| Apr 8, 8:15 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Guilford | 45 min |
| Apr 8, 8:17 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax | 29 min |
| Apr 8, 8:25 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Orange, Person | 50 min |
| Apr 8, 8:45 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax | 43 min |
| Apr 8, 9:31 PM EDT | Tornado Warning | AKQ | Brunswick, Lunenburg, Mecklenburg | 29 min |
| Apr 8, 9:45 PM EDT | Severe Thunderstorm Warning | AKQ | Amelia, Chesterfield, Dinwiddie, Lunenburg, Nottoway, Prince Edward and 1 more | 45 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.2 hours before the alert went out and 4 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
- 7 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 4:28 PM EDT | Tornado Watch | SPC | Cabarrus, Davie, Gaston, Iredell, Mecklenburg, Rowan and 1 more | 7 hr |
| Apr 8, 6:37 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Catawba, Chatham and 23 more | 53 min |
Nearby
Tornado Watches in Virginia, 2010Tornado Watches in North Carolina, 2010Every tornado watch in 2010
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.