Alert archive / West Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 2370
The Storm Prediction Center issued this mesoscale discussion at Dec 7, 2011, 2:44 PM EST for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 7, 2011, 2:44 PM EST (19:44 UTC)
- Expired
- Dec 7, 2011, 5:45 PM EST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Allegany County, MD, Garrett County, MD, Bedford County, PA, Fayette County, PA, Somerset County, PA, Highland County, VA, Barbour County, WV, Braxton County, WV, Fayette County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Lewis County, WV, Mineral County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV
The radar
The Pittsburgh radar (KPBZ), 172 km from the middle of the area, began a volume at 19:48 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
Pittsburgh, PA (KPIT), launched 12:00Z, 7.7 hours before the alert went out and 156 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
- 3 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 432 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 126 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 |
|---|---|---|---|---|
| Dec 7, 5:56 PM EST | Severe Thunderstorm Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 4 hr |
| Dec 7, 6:21 PM EST | Mesoscale Discussion | SPC | Bradford, Carbon, Columbia, Cumberland, Dauphin, Franklin and 20 more | 4 hr |
| Dec 7, 4:56 PM EST | Mesoscale Discussion | SPC | Brunswick, Charles City, Chesterfield, Dinwiddie, Greensville, Henrico and 18 more | 94 min |
| Dec 7, 5:42 PM EST | Mesoscale Discussion | SPC | Brunswick, Charles City, Chesterfield, Dinwiddie, Gloucester, Greensville and 32 more | 33 min |
Nearby
Mesoscale Discussions in West Virginia, 2011Mesoscale Discussions in Pennsylvania, 2011Mesoscale Discussions in Maryland, 2011Every mesoscale discussion in 2011
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.