Alert archive / North Carolina / Tornado Watches in 2010
Tornado Watch 763
The Storm Prediction Center issued this tornado watch at Dec 1, 2010, 6:12 AM EST for 4 counties in Maryland; 13 counties in North Carolina; 11 counties in Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 1, 2010, 6:12 AM EST (11:12 UTC)
- Expired
- Dec 1, 2010, 10:00 AM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 28 counties
Dorchester County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Beaufort County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Currituck County, NC, Dare County, NC, Gates County, NC, Hyde County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Tyrrell County, NC, Washington County, NC, Accomack County, VA, City of Chesapeake, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA, Mathews County, VA, Northampton County, VA
The radar
The Norfolk radar (KAKQ), 96 km from the middle of the area, began a volume at 11:12 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 30%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 11.2 hours before the alert went out and 247 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
- 671 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 416 m²/s²
- 0-3 km storm-relative helicity
- 505 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 |
|---|---|---|---|---|
| Dec 1, 3:48 AM EST | Tornado Watch | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 7 more | 7 hr |
| Dec 1, 5:18 AM EST | Mesoscale Discussion | SPC | Saint Mary's, Somerset, Wicomico, Worcester | 117 min |
| Dec 1, 7:51 AM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 15 more | 84 min |
| Nov 30, 7:47 PM EST | Mesoscale Discussion | SPC | Alexander, Alleghany, Avery, Burke, Caldwell, Catawba and 11 more | 88 min |
| Nov 30, 9:29 PM EST | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Catawba, Chatham and 23 more | 91 min |
| Nov 30, 9:56 PM EST | Tornado Watch | SPC | Alamance, Alexander, Alleghany, Anson, Cabarrus, Caswell and 25 more | 6 hr |
| Dec 1, 12:48 AM EST | Mesoscale Discussion | SPC | Alamance, Caswell, Chatham, Davidson, Durham, Forsyth and 13 more | 117 min |
| Dec 1, 1:02 AM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Carteret, Columbus and 28 more | 118 min |
| Dec 1, 2:13 AM EST | Tornado Watch | SPC | Alamance, Bertie, Bladen, Brunswick, Chatham, Columbus and 36 more | 8 hr |
| Dec 1, 4:25 AM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Chowan, Columbus and 29 more | 2 hr |
Nearby
Tornado Watches in North Carolina, 2010Tornado Watches in Virginia, 2010Tornado Watches in Maryland, 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.