Alert archive / Virginia / Mesoscale Discussions in 2008
Mesoscale Discussion 267
The Storm Prediction Center issued this mesoscale discussion at Feb 18, 2008, 3:45 AM EST for 8 counties in North Carolina; 21 counties in Virginia. It was in force for 30 min.
The area
The outline as issued.
The facts
- Issued
- Feb 18, 2008, 3:45 AM EST (08:45 UTC)
- Expired
- Feb 18, 2008, 4:15 AM EST
- In force
- 30 min
- Issued by
- the Storm Prediction Center
All 29 counties
Camden County, NC, Chowan County, NC, Currituck County, NC, Gates County, NC, Hertford County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Gloucester County, VA, Greensville County, VA, Isle of Wight County, VA, James City County, VA, Mathews County, VA, Northampton County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA
The radar
The Norfolk radar (KAKQ), 71 km from the middle of the area, began a volume at 08:47 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 8.8 hours before the alert went out and 169 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
- 458 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 359 m²/s²
- 0-3 km storm-relative helicity
- 421 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Feb 18, 2:04 AM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Carteret, Chowan and 22 more | 26 min |
| Feb 18, 2:30 AM EST | Tornado Watch | SPC | Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 26 more | 7 hr |
| Feb 18, 3:59 AM EST | Tornado Watch | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more | 6 hr |
| Feb 18, 6:18 AM EST | Mesoscale Discussion | SPC | Beaufort, Brunswick, Camden, Carteret, Chowan, Craven and 12 more | 57 min |
Nearby
Mesoscale Discussions in Virginia, 2008Mesoscale Discussions in North Carolina, 2008Every mesoscale discussion in 2008
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.