Alert archive / North Carolina / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 129
The Storm Prediction Center issued this severe thunderstorm watch at Apr 12, 2007, 12:55 AM EDT for 46 counties in North Carolina; 5 counties in South Carolina; 15 counties in Virginia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2007, 12:55 AM EDT (04:55 UTC)
- Expired
- Apr 12, 2007, 3:57 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 66 counties
Alamance County, NC, Anson County, NC, Bertie County, NC, Bladen County, NC, Cabarrus County, NC, Caswell County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Marion County, SC, Marlboro County, SC, Brunswick County, VA, Charlotte County, VA, City of Danville, VA, City of Emporia, VA, City of Franklin, VA, Dinwiddie County, VA, Greensville County, VA, Halifax County, VA, Lunenburg County, VA, Mecklenburg County, VA, Nottoway County, VA, Pittsylvania County, VA, Prince Edward County, VA, Southampton County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 73 km from the middle of the area, began a volume at 04:58 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
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 12:57 AM EDT | Severe Thunderstorm Warning | RAH | Stanly | 33 min |
| Apr 12, 1:08 AM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg, Union | 37 min |
| Apr 12, 1:28 AM EDT | Severe Thunderstorm Warning | RAH | Montgomery | 47 min |
| Apr 12, 2:25 AM EDT | Severe Thunderstorm Warning | RAH | Moore | 21 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 00:00Z, 4.9 hours before the alert went out and 65 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 679 m²/s²
- 0-3 km storm-relative helicity
- 961 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 12, 12:16 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Bladen, Cabarrus, Chatham, Cumberland and 31 more | 89 min |
| Apr 12, 2:39 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 35 more | 66 min |
| Apr 12, 3:25 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 36 more | 8 hr |
| Apr 12, 6:18 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 20 more | 57 min |
| Apr 12, 8:25 AM EDT | Mesoscale Discussion | SPC | Beaufort, Camden, Carteret, Craven, Currituck, Dare and 6 more | 95 min |
| Apr 11, 9:39 PM EDT | Mesoscale Discussion | SPC | Allendale, Bamberg, Beaufort, Colleton, Hampton, Jasper | 96 min |
| Apr 11, 10:43 PM EDT | Mesoscale Discussion | SPC | Abbeville, Aiken, Anderson, Bamberg, Barnwell, Calhoun and 14 more | 62 min |
| Apr 11, 11:01 PM EDT | Severe Thunderstorm Watch | SPC | Abbeville, Aiken, Allendale, Bamberg, Barnwell, Calhoun and 20 more | 6 hr |
| Apr 12, 4:01 AM EDT | Mesoscale Discussion | SPC | Allendale, Bamberg, Beaufort, Berkeley, Charleston, Colleton and 4 more | 89 min |
Nearby
Severe Thunderstorm Watches in North Carolina, 2007Severe Thunderstorm Watches in Virginia, 2007Severe Thunderstorm Watches in South Carolina, 2007Every severe thunderstorm watch in 2007
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.