Alert archive / Virginia / Mesoscale Discussions in 2012
Mesoscale Discussion 1406
The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2012, 2:57 PM EDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 5, 2012, 2:57 PM EDT (18:57 UTC)
- Expired
- Jul 5, 2012, 5:00 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 84 counties
Bath County, KY, Bell County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Caldwell County, NC, Mitchell County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Carter County, TN, Claiborne County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Johnson County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Alleghany County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Covington, VA, City of Galax, VA, City of Norton, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Dickenson County, VA, Floyd County, VA, Giles County, VA, Grayson County, VA, Lee County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA, Roanoke County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Greenbrier County, WV, McDowell County, WV, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Jackson,KY radar (KJKL), 109 km from the middle of the area, began a volume at 18:58 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, 7.0 hours before the alert went out and 237 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
- 932 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1190 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
397
ACUS11 KWNS 051858
SWOMCD
SPC MCD 051857
VAZ000-WVZ000-NCZ000-TNZ000-KYZ000-052100-
MESOSCALE DISCUSSION 1406
NWS STORM PREDICTION CENTER NORMAN OK
0157 PM CDT THU JUL 05 2012
AREAS AFFECTED...ERN KY...WRN VA
CONCERNING...SEVERE THUNDERSTORM WATCH 469...
VALID 051857Z - 052100Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 469
CONTINUES.
SUMMARY...SEVERE THREAT CONTINUES FOR SRN PTN WW 469 FOR DAMAGING
WINDS AND ISOLATED LARGE HAIL AHEAD OF CONVECTIVE LINE DROPPING
S/SWD THROUGH WV AND INTO ERN KY...WRN VA AND EVENTUALLY NERN TN AND
NWRN NC.
DISCUSSION...ORGANIZED CONVECTION CONTINUE TO MOVE S/SWD INTO VERY
MOIST UNSTABLE AIR MASS WITH MLCAPE IN EXCESS OF 3000 J/KG OVER ERN
KY. ALSO... NEWER STORMS CONTINUE TO FIRE ALONG WESTERN SIDE OF
WATCH AS ENTIRE COMPLEX MOVES S/SWD. AS STORM COVERAGE CONTINUES TO
INCREASE...SEVERE THREAT IN WRN PTN WATCH MAY SHIFT MORE TO LARGE
HAIL WITH DAMAGING WINDS STILL MORE THE THREAT IN THE CNTRL/ERN PTN
OF THE WATCH. NEW WW MAY BE POSSIBLE GENERALLY SW OF WW 469 ACROSS
PTNS MIDDLE/ERN TN AND SCNTRL KY.
..BOTHWELL/THOMPSON.. 07/05/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RAH...RNK...RLX...GSP...MRX...JKL...LMK...
LAT...LON 36268400 36678427 37048431 37448420 37878414 38248396
38358342 38198314 37928286 37678252 37568225 37468195
37508136 37738096 38038037 38037991 37737974 37207987
36748014 36268028 36018045 35838094 36018218 36128314
36268400SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 11:14 AM EDT | Mesoscale Discussion | SPC | Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more | 91 min |
| Jul 5, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 31 more | 7 hr |
| Jul 5, 3:19 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Casey, Clinton, Cumberland, Green, Metcalfe and 3 more | 6 hr |
| Jul 5, 1:11 PM EDT | Mesoscale Discussion | SPC | Buncombe, Cherokee, Clay, Graham, Haywood, Henderson and 9 more | 94 min |
| Jul 5, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more | 8 hr |
| Jul 5, 1:40 PM EDT | Mesoscale Discussion | SPC | Anson, Beaufort, Bertie, Bladen, Brunswick, Chowan and 34 more | 95 min |
| Jul 5, 6:41 PM EDT | Mesoscale Discussion | SPC | Bladen, Columbus, Robeson, Scotland | 94 min |
| Jul 5, 7:20 PM EDT | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, Franklin and 13 more | 115 min |
| Jul 4, 8:05 PM EDT | Mesoscale Discussion | SPC | Clarke, Frederick, Loudoun, Rappahannock, Shenandoah, Warren and 1 more | 55 min |
| Jul 5, 3:29 AM EDT | Mesoscale Discussion | SPC | Essex, King George, Lancaster, Northumberland, Richmond, Stafford and 1 more | 91 min |
| Jul 4, 9:48 PM EDT | Mesoscale Discussion | SPC | Brooke, Hancock, Marshall, Ohio, Pleasants, Tyler | 87 min |
| Jul 4, 10:19 PM EDT | Severe Thunderstorm Watch | SPC | Brooke, Hancock, Marshall, Ohio, Wetzel | 4 hr |
| Jul 5, 8:00 AM EDT | Mesoscale Discussion | SPC | Brooke, Doddridge, Hancock, Marshall, Ohio, Pleasants and 4 more | 90 min |
Nearby
Mesoscale Discussions in Virginia, 2012Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Every mesoscale discussion in 2012
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.