Alert archive / Virginia / Mesoscale Discussions in 2008
Mesoscale Discussion 2226
The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2008, 8:40 AM EDT for 4 counties in Maryland; Currituck County, North Carolina; 16 counties in Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2008, 8:40 AM EDT (12:40 UTC)
- Expired
- Sep 6, 2008, 10:45 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Dorchester County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Currituck County, NC, Accomack County, VA, City of Chesapeake, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Gloucester County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, Northampton County, VA, Northumberland County, VA, York County, VA
The radar
The Norfolk radar (KAKQ), 107 km from the middle of the area, began a volume at 12:40 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 0.7 hours before the alert went out and 240 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
- 439 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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 |
|---|---|---|---|---|
| Sep 6, 4:22 AM EDT | Mesoscale Discussion | SPC | Frederick | 3 hr |
| Sep 6, 4:45 AM EDT | Tornado Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 8 hr |
| Sep 6, 11:09 AM EDT | Mesoscale Discussion | SPC | Caroline, Dorchester, Somerset, Wicomico, Worcester | 66 min |
| Sep 5, 9:06 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 35 more | 114 min |
| Sep 6, 3:33 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 21 more | 87 min |
Nearby
Mesoscale Discussions in Virginia, 2008Mesoscale Discussions in Maryland, 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.