Alert archive / West Virginia / Mesoscale Discussions in 2016
Mesoscale Discussion 484
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2016, 3:56 PM EDT for 5 states. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2016, 3:56 PM EDT (19:56 UTC)
- Expired
- Apr 28, 2016, 5:00 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 105 counties
Boyd County, KY, Greenup County, KY, Lawrence County, KY, Martin County, KY, Alamance County, NC, Alleghany County, NC, Ashe County, NC, Caswell County, NC, Chatham County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Granville County, NC, Guilford County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Rockingham County, NC, Rowan County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Alleghany County, VA, Amherst County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Campbell County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Pleasants County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 86 km from the middle of the area, began a volume at 19:57 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
Roanoke, VA (KRNK), launched 12:00Z, 7.9 hours before the alert went out and 146 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
- 1309 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
628
ACUS11 KWNS 281957
SWOMCD
SPC MCD 281956
VAZ000-NCZ000-WVZ000-OHZ000-TNZ000-KYZ000-282100-
MESOSCALE DISCUSSION 0484
NWS STORM PREDICTION CENTER NORMAN OK
0256 PM CDT THU APR 28 2016
AREAS AFFECTED...CNTRL WV SEWD INTO SW VA AND NC
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 281956Z - 282100Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...TSTMS EXPECTED TO INCREASE FROM CNTRL WV SEWD ACROSS THE
APPALACHIANS INTO WRN/NRN NC...POSING A THREAT FOR HAIL/LOCALLY DMGG
WIND.
DISCUSSION...SCTD TSTMS ARE FORMING OVER THE HIGHER TERRAIN OF WV/SW
VA AND WRN NC...IN LOBE OF ASCENT SPREADING EWD IN BASE OF WEAKENING
MIDWEST TROUGH. 40-50 UNIDIRECTIONAL WNWLY 700-500 MB FLOW COULD
SUPPORT A FEW SUSTAINED MULTICELLS AND SUPERCELLS WITH A RISK FOR
SVR HAIL AND WIND AS THEY GROW UPSCALE INTO TWO OR THREE ESE-MOVING
CLUSTERS THROUGH EARLY TNGT. SOME HAIL THREAT COULD ALSO EXTEND EWD
ATOP COOL BNDRY LYR AIR DAMMED AGAINST THE E SLOPES OF THE MTNS.
..CORFIDI.. 04/28/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...AKQ...LWX...RAH...RNK...PBZ...RLX...GSP...MRX...
JKL...ILN...
LAT...LON 35627886 36587856 38097935 39077974 39478066 39678155
39498245 39198297 38848315 38448303 37638242 36418170
35358014 35627886SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 8:24 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Barren, Bullitt, Cumberland, Green and 16 more | 2 hr |
| Apr 28, 4:21 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Alleghany, Ashe, Burke, Caldwell and 32 more | 7 hr |
| Apr 28, 7:03 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Camden, Caswell, Chatham and 34 more | 87 min |
| Apr 28, 3:53 PM EDT | Mesoscale Discussion | SPC | Butler, Clinton, Fayette, Greene, Hamilton, Montgomery and 2 more | 97 min |
Nearby
Mesoscale Discussions in West Virginia, 2016Mesoscale Discussions in Virginia, 2016Mesoscale Discussions in North Carolina, 2016Every mesoscale discussion in 2016
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.