Alert archive / North Carolina / Mesoscale Discussions in 2008
Mesoscale Discussion 2000
The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2008, 6:26 PM EDT for 62 counties in North Carolina; 34 counties in South Carolina. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2008, 6:26 PM EDT (22:26 UTC)
- Expired
- Aug 2, 2008, 8:00 PM EDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 96 counties
Alamance County, NC, Alexander County, NC, Alleghany County, NC, Anson County, NC, Ashe County, NC, Avery County, NC, Bladen County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Caswell County, NC, Catawba County, NC, Chatham County, NC, Cleveland County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Duplin County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Gaston County, NC, Granville County, NC, Guilford County, NC, Harnett County, NC, Henderson County, NC, Hoke County, NC, Iredell County, NC, Johnston 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, Orange County, NC, Person County, NC, Polk County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham 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, Wake County, NC, Watauga County, NC, Wayne County, NC, Wilkes County, NC, Wilson County, NC, Yadkin County, NC, Yancey County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Bamberg County, SC, Calhoun County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenville County, SC, Greenwood County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC
The radar
The Columbia radar (KCAE), 103 km from the middle of the area, began a volume at 22:29 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 12:00Z, 10.4 hours before the alert went out and 169 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
- 617 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1463 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 022226 SWOMCD SPC MCD 022226 NCZ000-SCZ000-TNZ000-030000- MESOSCALE DISCUSSION 2000 NWS STORM PREDICTION CENTER NORMAN OK 0526 PM CDT SAT AUG 02 2008 AREAS AFFECTED...PORTIONS SC/NC. CONCERNING...SEVERE THUNDERSTORM WATCH 792...795... VALID 022226Z - 030000Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 792...795...CONTINUES. TSTMS ARE EXPECTED TO CONTINUE MOVING SEWD ACROSS WW 792 AND ERN PORTIONS NEW WW 795 ACROSS CAROLINAS...WITH INCREASING CONVECTIVE COVERAGE OVER AREAS FARTHER SE IN LOWER PIEDMONT AND COASTAL PLAIN. MULTICELLULAR HAIL/DOWNBURST POTENTIAL WILL CONTINUE FOR A FEW MORE HOURS...THEREFORE ANOTHER WW MAY BE REQUIRED. SFC MESOANALYSIS SHOWS TWO PRIMARY LOW LEVEL CONVERGENCE ZONES -- MAIN ONE BEING OVER APPALACHIANS/FOOTHILLS FROM GSO SWWD BETWEEN CHA-ATL...AND SMALLER/SHORTER BOUNDARY FROM WARREN COUNTY NC SWWD ACROSS LANCASTER COUNTY SC. SCATTERED TSTMS HAVE DEVELOPED ALONG LATTER BOUNDARY...WHICH SHOULD MOVE SLOWLY SEWD WITH AID FROM OUTFLOW PRODUCED BY CONVECTION THEREWITH. PRECONVECTIVE BOUNDARY LAYER WILL REMAIN WARM AND WELL-MIXED FOR ANOTHER COUPLE HOURS...WITH SFC TEMPS GENERALLY 90S AND DEW POINTS INCREASING FROM MID 60S IN WRN CAROLINAS TO 70S COASTAL PLAIN. ACCORDINGLY MODIFIED RAOBS AND RUC SOUNDINGS YIELD MLCAPES 1000-2000 J/KG...ATOP VERY STEEP SUBCLOUD LAPSE RATES SUPPORTING STG-SVR GUST THREAT. BUOYANCY WILL REMAIN NEARLY CONSTANT OUTSIDE OUTFLOW AREAS THROUGH ABOUT 01Z...AS DECREASE IN TEMPS IS OFFSET BY INCREASING SFC DEW POINTS IN AREAS OF PRIOR STG MIXING. DURING EVENING...EXPECT CONTINUED SFC COOLING TO BEGIN LOWERING BUOYANCY AND DIMINISHING POTENTIAL UPDRAFT/DOWNDRAFT VIGOR...WITH SVR THREAT SLOWLY BECOMING MORE ISOLATED/CONDITIONAL. WEAK LOW LEVEL WINDS AND LACK OF MORE ROBUST DEEP-LAYER SHEAR OVER THIS REGION SHOULD MAINTAIN PREDOMINANT MULTICELL MODE...WITH SOME CLUSTERING AND AMALGAMATED COLD POOLS POSSIBLY ENHANCING POTENTIAL FOR LOCAL CONCENTRATIONS OF DAMAGING WIND. ..EDWARDS.. 08/02/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MHX...RAH...ILM...RNK...CHS...CAE...GSP...MRX... 33538197 34638274 35748299 36518155 36477857 35557774 34617778 34137843 33807900 33547989 33168116
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 11:45 AM EDT | Mesoscale Discussion | SPC | Alamance, Cabarrus, Chatham, Davidson, Durham, Guilford and 12 more | 30 min |
| Aug 2, 12:02 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Alleghany, Anson, Ashe, Burke and 50 more | 8 hr |
| Aug 2, 2:30 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Alleghany, Anson, Ashe, Avery and 55 more | 90 min |
| Aug 2, 7:22 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 25 more | 6 hr |
| Aug 2, 5:51 PM EDT | Severe Thunderstorm Watch | SPC | Abbeville, Anderson, Cherokee, Chester, Greenville, Greenwood and 6 more | 5 hr |
Nearby
Mesoscale Discussions in North Carolina, 2008Mesoscale Discussions in South Carolina, 2008Every mesoscale discussion in 2008
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.