Alert archive / North Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 2102
The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2003, 9:20 PM EDT for 23 counties in North Carolina; 9 counties in Virginia. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2003, 9:20 PM EDT (01:20 UTC)
- Expired
- Aug 5, 2003, 10:15 PM EDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 32 counties
Alamance County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville 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, Northampton County, NC, Orange County, NC, Person County, NC, Richmond County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wilson County, NC, Brunswick County, VA, City of Emporia, VA, City of Franklin, VA, Greensville County, VA, Isle of Wight County, VA, Lunenburg County, VA, Mecklenburg County, VA, Southampton County, VA, Sussex County, VA
The radar
The Raleigh/Durham radar (KRAX), 38 km from the middle of the area, began a volume at 01:20 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.3 hours before the alert went out and 98 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
- 1051 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
775 ACUS11 KWNS 060121 SWOMCD SPC MCD 060120 VAZ000-NCZ000-060215- MESOSCALE DISCUSSION 2102 NWS STORM PREDICTION CENTER NORMAN OK 0820 PM CDT TUE AUG 05 2003 AREAS AFFECTED...SERN VA/CNTRL NC CONCERNING...SEVERE THUNDERSTORM WATCH 843... VALID 060120Z - 060215Z ...OVERALL SEVERE THREAT SEEMS TO BE DIMINISHING... WITH THE LOSS OF DAYTIME HEATING...STORMS ARE GRADUALLY WEAKENING. ALTHOUGH LARGE SCALE ASCENT REMAINS STRONG...LOW LEVEL LAPSE RATES HAVE WEAKENED AND LATEST RADAR TRENDS INDICATE THE CLUSTER OF STORMS FROM TDF/RDU/GSB IS MOVING THROUGH A RAIN-COOLED AIRMASS WHICH HAS BEEN OVERTURNED PREVIOUSLY. HOWEVER...FARTHER EAST...STORMS FORMING FROM SFQ SWWD TO ISO HAVE SOME POTENTIAL TO PRODUCE ISOLATED SEVERE WEATHER INCLUDING SOME HAIL AND/OR WINDS WITHIN THE NEXT 1-2 HOURS. ..TAYLOR.. 08/06/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...AKQ...RAH...RNK... 34987994 35438011 37037837 36907662 35007848
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 8:32 PM EDT | Mesoscale Discussion | SPC | Arlington, Fairfax, Prince William, City of Alexandria, City of Fairfax, City of Falls Church and 2 more | 88 min |
Nearby
Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in Virginia, 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.