Alert archive / Virginia / Mesoscale Discussions in 2012
Mesoscale Discussion 1007
The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2012, 3:35 PM EDT for 5 states. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2012, 3:35 PM EDT (19:35 UTC)
- Expired
- Jun 1, 2012, 4:30 PM EDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 86 counties
Allegany County, MD, Frederick County, MD, Garrett County, MD, Washington County, MD, Alleghany County, NC, Ashe County, NC, Forsyth County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cumberland County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA, Somerset County, PA, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Campbell County, VA, Carroll County, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Danville, VA, City of Galax, VA, City of Harrisonburg, 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, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Henry County, VA, Highland County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Wythe County, VA, Berkeley County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Monroe County, WV, Morgan County, WV, Pendleton County, WV, Pocahontas County, WV, Randolph County, WV, Tucker County, WV
The radar
The Roanoke radar (KFCX), 112 km from the middle of the area, began a volume at 19:37 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, 7.6 hours before the alert went out and 82 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
- 347 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
189 ACUS11 KWNS 011935 SWOMCD SPC MCD 011935 PAZ000-MDZ000-VAZ000-WVZ000-NCZ000-012030- MESOSCALE DISCUSSION 1007 NWS STORM PREDICTION CENTER NORMAN OK 0235 PM CDT FRI JUN 01 2012 AREAS AFFECTED...SRN PA...WRN MD...ERN WV...WRN VA...NWRN NC CONCERNING...TORNADO WATCH 332... VALID 011935Z - 012030Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 332 CONTINUES. SUMMARY...COLD FRONT WILL SPREAD INTO THE WRN PORTIONS OF WW 332 SHORTLY WITH AN INCREASED RISK FOR SEVERE TSTMS. PRE-FRONTAL ISOLATED SUPERCELLS SHOULD LINGER ALONG ERN EDGE OF WW 332. DISCUSSION...FRONTAL CONVECTION IS PROGRESSING EWD AT ROUGHLY 25-30KT AND IS CRESTING THE APPALACHIANS AS IT MOVES INTO THE WRN PARTS OF WW 332. THIS ACTIVITY WILL LIKELY INCREASE IN INTENSITY AS IT APPROACHES CNTRL PORTIONS OF THE WATCH DUE TO MORE FAVORABLE THERMODYNAMIC ENVIRONMENT CHARACTERIZED BY 1500-2000 J/KG MUCAPE. GIVEN THE CURRENT SPEED OF THE COLD FRONT IT SHOULD APPROACH THE ERN-MOST PART OF THE WATCH AROUND 23-00Z TIME FRAME. TORNADO THREAT REMAINS HIGHEST WITH PRE-FRONTAL SUPERCELLS. ..DARROW.. 06/01/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CTP...LWX...RAH...RNK...PBZ...RLX...GSP... LAT...LON 36088173 40687891 40697662 36087955 36088173
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 12:29 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Calvert, Carroll, Charles, Frederick, Howard and 5 more | 61 min |
| Jun 1, 1:03 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 11 more | 87 min |
| Jun 1, 1:28 PM EDT | Tornado Watch | SPC | Allegany, Frederick, Garrett, Washington | 8 hr |
| Jun 1, 1:50 PM EDT | Tornado Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 7 hr |
| Jun 1, 3:49 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 56 min |
| Jun 1, 6:54 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 2 hr |
| Jun 1, 1:54 PM EDT | Mesoscale Discussion | SPC | Anson, Bladen, Brunswick, Chatham, Columbus, Craven and 23 more | 66 min |
| Jun 1, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Beaufort, Bladen, Brunswick, Carteret and 41 more | 8 hr |
| Jun 1, 4:31 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 44 more | 59 min |
| Jun 1, 7:42 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 40 more | 2 hr |
| Jun 1, 4:25 PM EDT | Mesoscale Discussion | SPC | Berks, Chester, Delaware, Montgomery, Philadelphia | 65 min |
| Jun 1, 5:46 PM EDT | Mesoscale Discussion | SPC | Cameron, Centre, Clearfield, Clinton, Elk, Forest and 10 more | 89 min |
| Jun 1, 6:04 PM EDT | Tornado Watch | SPC | Cameron, Centre, Clearfield, Clinton, Columbia, Elk and 10 more | 5 hr |
Nearby
Mesoscale Discussions in Virginia, 2012Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Pennsylvania, 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.