Alert archive / Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 136
The Storm Prediction Center issued this mesoscale discussion at Feb 25, 2011, 1:48 AM EST for 5 states. It was in force for 27 min.
The area
The outline as issued.
The facts
- Issued
- Feb 25, 2011, 1:48 AM EST (06:48 UTC)
- Expired
- Feb 25, 2011, 2:15 AM EST
- In force
- 27 min
- Issued by
- the Storm Prediction Center
All 76 counties
Bell County, KY, Floyd County, KY, Harlan County, KY, Johnson County, KY, Knott County, KY, Lawrence County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Perry County, KY, Pike County, KY, Alleghany County, NC, Ashe County, NC, Avery County, NC, Caldwell County, NC, Madison County, NC, Mitchell County, NC, Watauga County, NC, Wilkes County, NC, Yancey County, NC, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Alleghany County, VA, Bland County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Galax, VA, City of Norton, VA, City of Radford, VA, Craig County, VA, Dickenson County, VA, Giles County, VA, Grayson County, VA, Lee County, VA, Montgomery County, VA, Pulaski County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Boone County, WV, Cabell County, WV, Clay County, WV, Fayette County, WV, Greenbrier County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Summers County, WV, Wayne County, WV, Wyoming County, WV
The radar
The Jackson,KY radar (KJKL), 131 km from the middle of the area, began a volume at 06:48 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 6.8 hours before the alert went out and 217 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
- 871 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 387 m²/s²
- 0-3 km storm-relative helicity
- 711 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 24, 8:22 PM EST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Caldwell, Calloway and 32 more | 83 min |
| Feb 24, 8:41 PM EST | Tornado Watch | SPC | Adair, Allen, Barren, Boyle, Butler, Casey and 17 more | 5 hr |
| Feb 24, 11:59 PM EST | Severe Thunderstorm Watch | SPC | Bell, Breathitt, Clay, Harlan, Jackson, Knott and 12 more | 5 hr |
| Feb 25, 2:35 AM EST | Mesoscale Discussion | SPC | Cherokee, Clay, Graham, Macon, Swain | 55 min |
| Feb 24, 9:11 PM EST | Mesoscale Discussion | SPC | Giles, Hardin, Lawrence, Lewis, Lincoln, McNairy and 4 more | 64 min |
| Feb 24, 9:30 PM EST | Tornado Watch | SPC | Franklin, Lincoln, Moore | 6 hr |
| Feb 24, 11:38 PM EST | Mesoscale Discussion | SPC | Giles, Hardin, Lawrence, Lewis, Lincoln, McNairy and 4 more | 97 min |
| Feb 25, 11:36 AM EST | Mesoscale Discussion | SPC | Accomack, Caroline, Essex, Gloucester, Hanover, King and Queen and 9 more | 84 min |
| Feb 25, 12:19 PM EST | Severe Thunderstorm Watch | SPC | Arlington, Fairfax, King George, Prince William, Spotsylvania, Stafford and 4 more | 3 hr |
| Feb 25, 2:40 PM EST | Mesoscale Discussion | SPC | Arlington, King George, Stafford, City of Alexandria, City of Falls Church, City of Fredericksburg | 65 min |
Nearby
Mesoscale Discussions in Virginia, 2011Mesoscale Discussions in West Virginia, 2011Mesoscale Discussions in Tennessee, 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.