Alert archive / West Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 453
The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2011, 10:43 AM EDT for Fayette County, Greene County, Washington County, Pennsylvania; 19 counties in West Virginia. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 2011, 10:43 AM EDT (14:43 UTC)
- Expired
- Apr 16, 2011, 11:45 AM EDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 22 counties
Fayette County, PA, Greene County, PA, Washington County, PA, Barbour County, WV, Braxton County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Nicholas County, WV, Pocahontas County, WV, Preston County, WV, Randolph County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Webster County, WV, Wetzel County, WV
The radar
The Pittsburgh radar (KPBZ), 146 km from the middle of the area, began a volume at 14:44 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
Roanoke, VA (KRNK), launched 12:00Z, 2.7 hours before the alert went out and 235 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 480 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 747 m²/s²
- 0-3 km storm-relative helicity
- 975 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 |
|---|---|---|---|---|
| Apr 16, 1:34 PM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Lawrence, Mercer, Washington | 116 min |
| Apr 16, 2:05 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 6 more | 55 min |
| Apr 16, 4:29 PM EDT | Mesoscale Discussion | SPC | Adams, Chester, Franklin, Fulton, Lancaster, York | 31 min |
| Apr 16, 4:41 PM EDT | Tornado Watch | SPC | Adams, Bedford, Berks, Blair, Chester, Cumberland and 13 more | 6 hr |
| Apr 16, 6:38 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Chester, Cumberland, Dauphin, Delaware and 13 more | 97 min |
| Apr 16, 12:52 PM EDT | Mesoscale Discussion | SPC | Berkeley, Hampshire, Hardy, Jefferson, Morgan, Pendleton | 113 min |
| Apr 16, 1:29 PM EDT | Tornado Watch | SPC | Berkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more | 8 hr |
Nearby
Mesoscale Discussions in West Virginia, 2011Mesoscale Discussions in Pennsylvania, 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.