Alert archive / North Carolina / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 843
The Storm Prediction Center issued this severe thunderstorm watch at Aug 5, 2003, 6:50 PM EDT for 23 counties in North Carolina; 11 counties in Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2003, 6:50 PM EDT (22:50 UTC)
- Expired
- Aug 5, 2003, 11:00 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Anson 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, City of Newport News, VA, Dinwiddie County, 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), 33 km from the middle of the area, began a volume at 22:51 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.
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 10:27 PM EDT | Severe Thunderstorm Warning | AKQ | York, City of Newport News | 28 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.8 hours before the alert went out and 103 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
- 249 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 9:59 PM EDT | Mesoscale Discussion | SPC | Ashe, Avery, Buncombe, Cherokee, Clay, Graham and 10 more | 2 hr |
| Aug 5, 12:49 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Chatham, Cumberland and 30 more | 116 min |
| Aug 5, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Cabarrus, Caswell, Catawba, Chatham and 24 more | 6 hr |
| Aug 5, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | Anson, Richmond, Union | 4 hr |
| Aug 5, 6:01 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 35 more | 59 min |
Nearby
Severe Thunderstorm Watches in North Carolina, 2003Severe Thunderstorm Watches in Virginia, 2003Every severe thunderstorm watch 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.