Alert archive / North Carolina / Mesoscale Discussions in 2009
Mesoscale Discussion 890
The Storm Prediction Center issued this mesoscale discussion at May 29, 2009, 2:22 PM EDT for 53 counties in North Carolina; 24 counties in South Carolina; 12 counties in Virginia. It was in force for 23 min.
The area
The outline as issued.
The facts
- Issued
- May 29, 2009, 2:22 PM EDT (18:22 UTC)
- Expired
- May 29, 2009, 2:45 PM EDT
- In force
- 23 min
- Issued by
- the Storm Prediction Center
All 89 counties
Alamance County, NC, Anson County, NC, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Caswell County, NC, Chatham County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Martin County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Orange County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Allendale County, SC, Bamberg County, SC, Beaufort 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, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC, Brunswick County, VA, Charlotte County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Suffolk, VA, Greensville County, VA, Halifax County, VA, Lunenburg County, VA, Mecklenburg County, VA, Southampton County, VA, Sussex County, VA
The radar
The Wilmington radar (KLTX), 110 km from the middle of the area, began a volume at 18:22 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
Charleston AFB, SC (KCHS), launched 12:00Z, 6.4 hours before the alert went out and 152 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
- 2514 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 668 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 56 more | 8 hr |
| May 29, 6:01 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 46 more | 59 min |
| May 29, 12:20 PM EDT | Mesoscale Discussion | SPC | Albemarle, Arlington, Caroline, Clarke, Culpeper, Essex and 26 more | 55 min |
| May 29, 1:26 PM EDT | Severe Thunderstorm Watch | SPC | Accomack, Albemarle, Amherst, Arlington, Buckingham, Caroline and 37 more | 8 hr |
| May 29, 4:30 PM EDT | Mesoscale Discussion | SPC | Albemarle, Amherst, Arlington, Buckingham, Caroline, Culpeper and 35 more | 60 min |
| May 29, 6:20 PM EDT | Mesoscale Discussion | SPC | Arlington, Buckingham, Caroline, Cumberland, Essex, Fairfax and 24 more | 55 min |
Nearby
Mesoscale Discussions in North Carolina, 2009Mesoscale Discussions in South Carolina, 2009Mesoscale Discussions in Virginia, 2009Every mesoscale discussion in 2009
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.