Alert archive / North Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 893
The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 9:45 PM EDT for 9 counties in North Carolina. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2003, 9:45 PM EDT (01:45 UTC)
- Expired
- May 9, 2003, 10:45 PM EDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
Counties Carteret County, NC, Craven County, NC, Duplin County, NC, Greene County, NC, Jones County, NC, Lenoir County, NC, Onslow County, NC, Pitt County, NC, Wayne County, NC
The radar
The Morehead City radar (KMHX), 53 km from the middle of the area, began a volume at 01:49 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 nearest sounding before it
Newport, NC (KMHX), launched 00:00Z, 1.8 hours before the alert went out and 52 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
- 1942 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1143 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 100146 SWOMCD SPC MCD 100145 NCZ000-100245- MESOSCALE DISCUSSION 0893 NWS STORM PREDICTION CENTER NORMAN OK 0845 PM CDT FRI MAY 09 2003 AREAS AFFECTED...ERN NC CONCERNING...TORNADO WATCH 325... VALID 100145Z - 100245Z COVERAGE OF THUNDERSTORMS IS CURRENTLY DECREASING ACROSS WW 325. WATCH MAY BE CANCELLED EARLY. A STRONG OUTFLOW BOUNDARY PRODUCED BY STORMS THAT MOVED ACROSS THE OUTER BANKS OF NC HAS PROGRESSED RAPIDLY SWWD ACROSS JONES AND WRN ONSLOW COUNTIES IN ERN NC AT 0135Z. ONE STRONG STORM REMAINS OVER CRAVEN COUNTY AT THE PRESENT TIME MOVING SEWD...HOWEVER...STABLE BOUNDARY LAYER AIR BEHIND THE OUTFLOW BOUNDARY WILL LIKELY LEAD TO A CONTINUED WEAKENING OF THIS REMAINING STORM DURING THE NEXT HOUR. IF THIS TREND CONTINUES...THE TORNADO WATCH WILL LIKELY BE CANCELLED PRIOR TO WATCH EXPIRATION TIME AT 10/03Z. WITH STRONG CONVECTIVE INHIBITION ACROSS THE REMAINDER OF THE REGION...ADDITIONAL THUNDERSTORM DEVELOPMENT IS NOT ANTICIPATED. ..BANACOS.. 05/10/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MHX...RAH...ILM... 34747812 35707812 35687733 35057669 34657626 34537701
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 12:41 PM EDT | Mesoscale Discussion | SPC | Alleghany, Ashe, Avery, Mitchell, Rockingham, Stokes and 4 more | 2 hr |
| May 10, 2:31 PM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Caswell, Chowan, Durham and 19 more | 89 min |
| May 10, 3:15 PM EDT | Tornado Watch | SPC | Alamance, Caswell, Durham, Edgecombe, Franklin, Granville and 11 more | 6 hr |
| May 10, 4:46 PM EDT | Mesoscale Discussion | SPC | Alamance, Caswell, Durham, Edgecombe, Franklin, Granville and 11 more | 89 min |
| May 10, 7:10 PM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 20 more | 6 hr |
Nearby
Mesoscale Discussions in North Carolina, 2003Every mesoscale discussion in 2003
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.