Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 158
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2012, 3:24 PM EST for 6 states. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2012, 3:24 PM EST (20:24 UTC)
- Expired
- Feb 24, 2012, 4:30 PM EST
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 82 counties
Fannin County, GA, Rabun County, GA, Towns County, GA, Union County, GA, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Cherokee County, NC, Clay County, NC, Cleveland County, NC, Davie County, NC, Forsyth County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Stokes County, NC, Surry County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Yancey County, NC, Cherokee County, SC, Greenville County, SC, Pickens County, SC, Spartanburg County, SC, Carter County, TN, Cocke County, TN, Greene County, TN, Johnson County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, City of Bristol, VA, City of Buena Vista, VA, City of Galax, 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, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wythe County, VA, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Greer radar (KGSP), 124 km from the middle of the area, began a volume at 20:26 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 12:00Z, 8.4 hours before the alert went out and 192 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
- 150 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 271 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
722 ACUS11 KWNS 242025 SWOMCD SPC MCD 242024 VAZ000-NCZ000-WVZ000-SCZ000-TNZ000-GAZ000-242130- MESOSCALE DISCUSSION 0158 NWS STORM PREDICTION CENTER NORMAN OK 0224 PM CST FRI FEB 24 2012 AREAS AFFECTED...WRN VA...WRN NC...NWRN SC CONCERNING...TORNADO WATCH 36... VALID 242024Z - 242130Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 36 CONTINUES. CONVECTION APPEARS TO BE INCREASING ALONG THE ADVANCING COLD FRONT AS IT APPROACHES THE ERN EDGE OF WW36. GIVEN THE SPEED/MOVEMENT OF THIS ACTIVITY IT SHOULD QUICKLY SPREAD INTO WRN PORTIONS OF WW38 OVER THE NEXT HOUR. HOWEVER...SRN PORTION OF THE STRONGER LINE SEGMENTS MAY LINGER ACROSS THE NC COUNTIES OF WW36 BEYOND 21Z. FOR THIS REASON A LOCAL EXTENSION IN TIME MAY BE REQUIRED TO ACCOUNT FOR THIS THREAT. ..DARROW.. 02/24/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...AKQ...LWX...RAH...RNK...RLX...GSP...MRX...FFC... LAT...LON 34808470 37788089 37787799 34808189 34808470
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 6:56 AM EST | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bartow, Bibb, Butts and 79 more | 94 min |
| Feb 24, 8:48 AM EST | Tornado Watch | SPC | Baldwin, Banks, Barrow, Bibb, Bleckley, Burke and 64 more | 7 hr |
| Feb 24, 9:17 AM EST | Tornado Watch | SPC | Franklin, Habersham, Hart, Rabun, Stephens | 7 hr |
| Feb 24, 10:49 AM EST | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Burke, Butts, Calhoun and 57 more | 56 min |
| Feb 24, 12:00 PM EST | Mesoscale Discussion | SPC | Fannin, Rabun, Towns, Union | 60 min |
| Feb 24, 12:04 PM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 52 more | 7 hr |
| Feb 24, 1:50 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 86 more | 85 min |
| Feb 24, 4:11 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 56 more | 64 min |
| Feb 24, 9:05 AM EST | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 29 more | 25 min |
| Feb 24, 11:10 AM EST | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, New Hanover, Onslow, Pender and 1 more | 65 min |
| Feb 24, 12:43 PM EST | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 51 more | 92 min |
| Feb 24, 1:19 PM EST | Tornado Watch | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 55 more | 7 hr |
| Feb 24, 4:45 PM EST | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 51 more | 90 min |
| Feb 23, 10:46 PM EST | Mesoscale Discussion | SPC | Cheatham, Clay, Jackson, Macon, Overton, Pickett and 5 more | 89 min |
| Feb 24, 2:00 AM EST | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 31 more | 2 hr |
Nearby
Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in Virginia, 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.