Alert archive / West Virginia / Mesoscale Discussions in 2011
Mesoscale Discussion 352
The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2011, 6:00 PM EDT for 8 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 4, 2011, 6:00 PM EDT (22:00 UTC)
- Expired
- Apr 4, 2011, 7:30 PM EDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 125 counties
Bell County, KY, Boyd County, KY, Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Lawrence County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Whitley County, KY, Garrett County, MD, Cherokee County, NC, Graham County, NC, Haywood County, NC, Macon County, NC, Madison County, NC, Mitchell County, NC, Swain County, NC, Yancey County, NC, Lawrence County, OH, Monroe County, OH, Washington County, OH, Allegheny County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Anderson County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Cumberland 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, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Bland County, VA, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Brooke 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, Marion County, WV, Marshall County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Nicholas County, WV, Ohio County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 75 km from the middle of the area, began a volume at 22:02 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, 10.0 hours before the alert went out and 210 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
- 2071 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 339 m²/s²
- 0-3 km storm-relative helicity
- 406 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
713
ACUS11 KWNS 042200
SWOMCD
SPC MCD 042200
MDZ000-PAZ000-WVZ000-VAZ000-OHZ000-NCZ000-TNZ000-KYZ000-042330-
MESOSCALE DISCUSSION 0352
NWS STORM PREDICTION CENTER NORMAN OK
0500 PM CDT MON APR 04 2011
AREAS AFFECTED...ERN TN...FAR WRN NC AND VA...ERN KY...WV...SWRN PA
CONCERNING...SEVERE THUNDERSTORM WATCH 94...
VALID 042200Z - 042330Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 94
CONTINUES.
FAST FORWARD PROPAGATING QLCS WILL APPROACH THE ERN EDGE OF WW 94 BY
23Z...WITH SCATTERED CONVECTION CONTINUING TO DEVELOP AHEAD OF THE
LINE ALONG THE CREST OF THE APPALACHIANS FROM WRN NC/ERN TN N-NEWD
INTO SWRN PA. THIS PRE SQUALL LINE CONVECTION IS FORMING ALONG THE
ERN EDGE OF THE MOISTURE/INSTABILITY AXIS...WHERE SURFACE DEWPOINTS
TRANSITION FROM THE MID-UPR 50S OVER THE TN/OH VALLEYS TO 40S ALONG
AND TO THE LEE OF THE APPALACHIANS. SHORT TERM MODEL GUIDANCE
INDICATES MOISTURE WILL NOT ADVECT NWD IN TIME TO SUPPORT ROBUST
DESTABILIZATION AND MCS MAINTENANCE E OF WW 94. THEREFORE...AN
ADDITIONAL WW DOES NOT APPEAR NECESSARY...THOUGH LOCAL WFO EXTENSION
OF WW 94 IN TIME AND SPACE MAY BE REQUIRED TO ADDRESS ANY LINGERING
SVR WEATHER THREAT.
..GARNER.. 04/04/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...GSP...MRX...JKL...
OHX...
LAT...LON 37598048 35778230 35108350 35078515 36148499 38358280
40478046 40687906 39657895 37598048SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 5:30 AM EDT | Severe Thunderstorm Watch | SPC | Boone, Campbell, Kenton | 8 hr |
| Apr 4, 7:53 AM EDT | Mesoscale Discussion | SPC | Boone, Breckinridge, Caldwell, Carroll, Crittenden, Daviess and 16 more | 2 hr |
| Apr 4, 8:22 AM EDT | Tornado Watch | SPC | Ballard, Breckinridge, Butler, Caldwell, Calloway, Carlisle and 24 more | 7 hr |
| Apr 4, 12:34 PM EDT | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 43 more | 5 hr |
| Apr 4, 12:50 PM EDT | Mesoscale Discussion | SPC | Boone, Campbell, Kenton | 25 min |
| Apr 4, 2:25 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 74 more | 65 min |
| Apr 4, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 33 more | 6 hr |
| Apr 4, 3:08 PM EDT | Mesoscale Discussion | SPC | Allen, Clinton, Cumberland, McCreary, Monroe, Russell and 2 more | 67 min |
| Apr 4, 4:49 PM EDT | Mesoscale Discussion | SPC | Bell, Boyd, Breathitt, Carter, Clay, Elliott and 21 more | 56 min |
| Apr 4, 5:20 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Crawford, Darke and 21 more | 25 min |
| Apr 4, 4:12 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Carroll, Columbiana, Coshocton, Guernsey and 12 more | 63 min |
| Apr 4, 11:25 AM EDT | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Davidson, Decatur, Dickson and 19 more | 2 hr |
| Apr 4, 2:03 PM EDT | Tornado Watch | SPC | Franklin, Lincoln, Moore | 7 hr |
Nearby
Mesoscale Discussions in West Virginia, 2011Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Kentucky, 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.