Alert archive / North Carolina / Mesoscale Discussions in 2008
Mesoscale Discussion 2221
The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2008, 4:00 PM EDT for 19 counties in North Carolina; 6 counties in South Carolina. It was in force for 30 min.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2008, 4:00 PM EDT (20:00 UTC)
- Expired
- Sep 5, 2008, 4:30 PM EDT
- In force
- 30 min
- Issued by
- the Storm Prediction Center
All 25 counties
Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Dare County, NC, Duplin County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Sampson County, NC, Wayne County, NC, Berkeley County, SC, Charleston County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 28 km from the middle of the area, began a volume at 20:03 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
Newport, NC (KMHX), launched 12:00Z, 8.0 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
- 5 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 651 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 052001 SWOMCD SPC MCD 052000 NCZ000-SCZ000-052030- MESOSCALE DISCUSSION 2221 NWS STORM PREDICTION CENTER NORMAN OK 0300 PM CDT FRI SEP 05 2008 AREAS AFFECTED...ERN NC/PART OF ERN SC CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON VALID 052000Z - 052030Z ENVIRONMENTAL CONDITIONS ARE BECOMING MORE CONDUCIVE FOR AN INCREASING TORNADO THREAT AS HANNA APPROACHES THE CAROLINAS. A TORNADO WATCH ISSUANCE WILL BE COORDINATED BETWEEN THE SPC AND THE AFFECTED LOCAL NATIONAL WEATHER SERVICE OFFICES DURING THE NEXT HOUR. 18Z SOUNDINGS ALONG THE SC/NC COAST INDICATED STRENGTHENING ELY WINDS IN THE LOWER-MID LEVELS DURING THE LAST 6 HOURS....WITH OBJECTIVE ANALYSES SHOWING AN EFFECTIVE SRH VALUES OF 100-200 M2/S2 FROM THE GA COAST NEWD ALONG THE COASTAL AREAS OF SC/NC. SURFACE HEATING COMBINED WITH THE INFLUX OF TROPICAL MOISTURE NOW INTO THE COASTAL AREAS OF SC/NC WITH SURFACE DEWPOINTS IN THE MIDDLE 70S IS RESULTING IN GREATER INSTABILITY. ..PETERS.. 09/05/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MHX...RAH...ILM...CHS... 31938037 32698041 33847977 34917871 35627761 35837645 35467510 34697538 34017665 33337781 32307923
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:15 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 12 more | 60 min |
| Sep 5, 4:39 PM EDT | Tornado Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 35 more | 12 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.