Alert archive / North Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 596
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2003, 1:45 PM EDT for 40 counties in North Carolina; 6 counties in South Carolina; 8 counties in Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2003, 1:45 PM EDT (17:45 UTC)
- Expired
- Apr 26, 2003, 3:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Edgecombe County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, City of Chesapeake, VA, City of Franklin, VA, City of Newport News, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, Isle of Wight County, VA, Southampton County, VA
The radar
The Raleigh/Durham radar (KRAX), 79 km from the middle of the area, began a volume at 17:48 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 12:00Z, 5.8 hours before the alert went out and 105 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
- 54 J/kg
- Mixed-layer CIN
- -207 J/kg
- Mixed-layer LCL
- 947 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
749 ACUS11 KWNS 261745 SWOMCD SPC MCD 261745 NCZ000-VAZ000-SCZ000-261945- MESOSCALE DISCUSSION 0596 NWS STORM PREDICTION CENTER NORMAN OK 1245 PM CDT SAT APR 26 2003 AREAS AFFECTED...SERN VA/ERN NC/NERN SC CONCERNING...SEVERE THUNDERSTORM WATCH 174... VALID 261745Z - 261945Z THE THREAT OF LARGE HAIL AND ISOLATED WIND DAMAGE CONTINUES ACROSS WW174. REGIONAL RADAR DATA SHOW A CLUSTER OF TSTMS CONTINUING TO INTENSIFY ACROSS PORTIONS OF WW174 FROM RWI SWD TO NEAR ILM AND CRE. BREAKS IN THE CLOUDS AHEAD OF THESE STORMS HAS ALLOWED TEMPERATURES TO WARM INTO THE MID AND UPPER 70S ACROSS ERN NC. THESE TEMPERATURES...IN COMBINATION WITH DEWPOINTS AROUND 65F...ARE CONTRIBUTING TO SBCAPES OF 1000-2000 J/KG. DEEP-LAYER SHEAR REMAINS MARGINALLY STRONG ACROSS THE WARM SECTOR WITH 35-40KTS THROUGH THE LOWEST 6KM AGL. GIVEN THE MODERATE DEGREE OF INSTABILITY AND SHEAR...ONGOING TSTMS WILL LIKELY CONTINUE TO INTENSIFY AS THEY MOVE NEWD ACROSS ERN NC/SERN VA. LARGE HAIL WILL REMAIN THE PRIMARY SEVERE WEATHER THREAT...HOWEVER ISOLATED WIND DAMAGE IS POSSIBLE AS WELL. ..MEAD.. 04/26/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...AKQ...MHX...RAH...ILM...CAE... 34757961 35437880 36167800 36807723 37287658 37097636 36377564 35987522 35567569 34507701 33497823 33057878 33167896 33797956 34187996 34348012
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 10:03 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 54 more | 117 min |
| Apr 26, 11:30 AM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 35 more | 6 hr |
| Apr 26, 2:04 PM EDT | Mesoscale Discussion | SPC | Alexander, Anson, Avery, Burke, Cabarrus, Caldwell and 20 more | 116 min |
| Apr 26, 4:11 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 34 more | 64 min |
Nearby
Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in Virginia, 2003Mesoscale Discussions in South 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.