Alert archive / North Carolina / Mesoscale Discussions in 2012
Mesoscale Discussion 1005
The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2012, 1:54 PM EDT for 29 counties in North Carolina; 20 counties in South Carolina. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2012, 1:54 PM EDT (17:54 UTC)
- Expired
- Jun 1, 2012, 3:00 PM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 49 counties
Anson County, NC, Bladen County, NC, Brunswick County, NC, Chatham County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Greene County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Montgomery County, NC, Moore County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wake County, NC, Wayne County, NC, Wilson County, NC, Bamberg County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Kershaw County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 5.9 hours before the alert went out and 137 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
- 415 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
772 ACUS11 KWNS 011755 SWOMCD SPC MCD 011754 NCZ000-SCZ000-011900- MESOSCALE DISCUSSION 1005 NWS STORM PREDICTION CENTER NORMAN OK 1254 PM CDT FRI JUN 01 2012 AREAS AFFECTED...MUCH OF ERN NC AND ERN SC CONCERNING...SEVERE POTENTIAL...WATCH LIKELY VALID 011754Z - 011900Z PROBABILITY OF WATCH ISSUANCE...95 PERCENT SUMMARY...SEVERE THUNDERSTORM WATCH WILL BE ISSUED SHORTLY FOR MUCH OF COASTAL NC/SC. DISCUSSION...BROKEN LINE OF STRONG/SEVERE THUNDERSTORMS IS DEVELOPING FROM NEAR GSO IN NC...SWWD TO THE SC/GA BORDER EAST OF AGS. THIS ACTIVITY SHOULD CONTINUE TO INCREASE IN INTENSITY AS IT ENCOUNTERS AN ENVIRONMENT CHARACTERIZED BY STEEP LOW LEVEL LAPSE RATES AND SBCAPE APPROACHING 2500-3000 J/KG. DEEP LAYER SHEAR ON THE ORDER OF 35KT SUGGESTS ORGANIZED MULTI-CELL UPDRAFTS AND PERHAPS EVEN A FEW SUPERCELLS WILL BE COMMON. ..DARROW/CARBIN.. 06/01/2012 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MHX...RAH...ILM...CHS...CAE...GSP... LAT...LON 33088141 35927985 35707697 34467691 32088025 33088141
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:03 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Edgecombe, Franklin and 13 more | 87 min |
| Jun 1, 1:28 PM EDT | Tornado Watch | SPC | Alleghany, Ashe, Caswell, Rockingham, Stokes, Surry and 3 more | 8 hr |
| Jun 1, 1:50 PM EDT | Tornado Watch | SPC | Bertie, Camden, Chowan, Currituck, Gates, Granville and 8 more | 7 hr |
| Jun 1, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Beaufort, Bladen, Brunswick, Carteret and 41 more | 8 hr |
| Jun 1, 3:35 PM EDT | Mesoscale Discussion | SPC | Alleghany, Ashe, Forsyth, Rockingham, Stokes, Surry and 2 more | 55 min |
| Jun 1, 3:49 PM EDT | Mesoscale Discussion | SPC | Granville, Halifax, Northampton, Person, Vance, Warren | 56 min |
| Jun 1, 4:31 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 44 more | 59 min |
| Jun 1, 6:54 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Gates, Granville and 8 more | 2 hr |
| Jun 1, 7:42 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 40 more | 2 hr |
Nearby
Mesoscale Discussions in North Carolina, 2012Mesoscale Discussions in South Carolina, 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.