Alert archive / North Carolina / Mesoscale Discussions in 2011
Mesoscale Discussion 716
The Storm Prediction Center issued this mesoscale discussion at May 10, 2011, 9:01 PM EDT for 5 states. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2011, 9:01 PM EDT (01:01 UTC)
- Expired
- May 10, 2011, 10:00 PM EDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 106 counties
Alexander County, NC, Alleghany County, NC, Anson County, NC, Ashe County, NC, Avery County, NC, Bladen County, NC, Brunswick County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Harnett County, NC, Haywood County, NC, Henderson County, NC, Hoke County, NC, Iredell County, NC, Lee County, NC, Lincoln County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Montgomery County, NC, Moore County, NC, Pender County, NC, Polk County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Rutherford County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Stokes County, NC, Surry County, NC, Transylvania County, NC, Union County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Yancey County, NC, Berkeley County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Richland County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC, Carter County, TN, Cocke County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN, Bland County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Galax, VA, City of Norton, VA, Dickenson County, VA, Grayson County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Logan County, WV, McDowell County, WV
The radar
The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 01:03 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.0 hours before the alert went out and 154 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
- 694 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 1286 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 420 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 11.6
The text
As transmitted, in the capitals the NWS used until 2016.
916 ACUS11 KWNS 110101 SWOMCD SPC MCD 110101 NCZ000-SCZ000-VAZ000-WVZ000-TNZ000-KYZ000-110200- MESOSCALE DISCUSSION 0716 NWS STORM PREDICTION CENTER NORMAN OK 0801 PM CDT TUE MAY 10 2011 AREAS AFFECTED...ERN KY/WRN VA...SWD INTO THE CAROLINAS CONCERNING...SEVERE THUNDERSTORM WATCH 269... VALID 110101Z - 110200Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 269 CONTINUES. CONVECTION HAS DISSIPATED OVER MUCH OF THE WW ALTHOUGH TWO AREAS OF CONCERN REMAIN. SEVERAL STRONG/SEVERE STORMS HAVE YET TO MOVE OFFSHORE ALONG THE SC/NC COAST...BUT THIS ACTIVITY WILL DO SO OVER THE NEXT HOUR. IN ITS WAKE...CONVECTION WILL STRUGGLE TO DEVELOP OVER THE CAROLINAS PRIOR TO WATCH EXPIRATION. THE PRIMARY SEVERE THREAT IS TRANSITIONING TO ERN KY AHEAD OF SWD SURGING MCS. THIS ACTIVITY IS SPREADING SOUTH AT ROUGHLY 25-30KT AND THE LEADING EDGE SHOULD APPROACH THE KY/VA/TN BORDER BY 03Z. LARGE HAIL AND DAMAGING WINDS CAN BE EXPECTED WITH THIS MCS. ..DARROW.. 05/11/2011 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MHX...RAH...ILM...RNK...CHS...RLX...CAE...GSP... MRX...JKL... LAT...LON 35898384 37858196 34507762 32557941 35898384
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 10:18 PM EDT | Mesoscale Discussion | SPC | Alexander, Ashe, Avery, Buncombe, Burke, Caldwell and 16 more | 27 min |
| May 10, 10:42 PM EDT | Severe Thunderstorm Watch | SPC | Alexander, Avery, Buncombe, Burke, Caldwell, Catawba and 13 more | 4 hr |
| May 11, 12:14 AM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 17 more | 61 min |
| May 11, 2:37 AM EDT | Mesoscale Discussion | SPC | Alexander, Ashe, Avery, Buncombe, Burke, Caldwell and 14 more | 23 min |
| May 11, 6:06 PM EDT | Mesoscale Discussion | SPC | Buncombe, Haywood, Henderson, Jackson, Polk, Transylvania | 54 min |
| May 11, 12:41 AM EDT | Severe Thunderstorm Watch | SPC | Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 11 more | 3 hr |
| May 11, 1:35 AM EDT | Mesoscale Discussion | SPC | Berkeley, Charleston, Darlington, Dorchester, Florence, Georgetown and 2 more | 25 min |
| May 11, 1:41 AM EDT | Severe Thunderstorm Watch | SPC | Berkeley, Charleston, Darlington, Dillon, Dorchester, Florence and 5 more | 3 hr |
| May 11, 3:34 AM EDT | Mesoscale Discussion | SPC | Berkeley, Charleston, Chesterfield, Colleton, Darlington, Dillon and 7 more | 56 min |
| May 10, 11:17 PM EDT | Mesoscale Discussion | SPC | Bland, Buchanan, Dickenson, Floyd, Giles, Montgomery and 7 more | 58 min |
| May 11, 12:37 AM EDT | Mesoscale Discussion | SPC | Cabell, Lincoln, Mingo, Wayne | 53 min |
Nearby
Mesoscale Discussions in North Carolina, 2011Mesoscale Discussions in South Carolina, 2011Mesoscale Discussions in Virginia, 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.