Alert archive / North Carolina / Mesoscale Discussions in 2005
Mesoscale Discussion 2243
The Storm Prediction Center issued this mesoscale discussion at Sep 20, 2005, 6:52 PM EDT for 23 counties in North Carolina; Mecklenburg County, Virginia. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Sep 20, 2005, 6:52 PM EDT (22:52 UTC)
- Expired
- Sep 20, 2005, 8:15 PM EDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 24 counties
Alamance County, NC, Caswell County, NC, Chatham County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wilson County, NC, Mecklenburg County, VA
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.9 hours before the alert went out and 92 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
- 1232 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 722 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 |
|---|---|---|---|---|
| Sep 20, 12:39 PM EDT | Mesoscale Discussion | SPC | Caswell, Granville, Guilford, Person, Rockingham | 96 min |
| Sep 20, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Bertie, Caswell, Chatham, Durham, Edgecombe and 16 more | 7 hr |
Nearby
Mesoscale Discussions in North Carolina, 2005Mesoscale Discussions in Virginia, 2005Every mesoscale discussion in 2005
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.