Alert archive / North Carolina / Tornado Watches in 2023
Tornado Watch 663
The Storm Prediction Center issued this tornado watch at Aug 30, 2023, 7:57 PM EDT for 12 counties in North Carolina. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2023, 7:57 PM EDT (23:57 UTC)
- Expired
- Aug 31, 2023, 7:00 AM EDT
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Strongest gust expected
- 50 kt
Counties Beaufort County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Dare County, NC, Hyde County, NC, Jones County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC
The radar
The Morehead City radar (KMHX), 60 km from the middle of the area, began a volume at 23:56 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 5%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 20%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:08 PM EDT | Tornado Warning | ILM | Brunswick | 13 min |
| Aug 30, 10:54 PM EDT | Flash Flood Warning | ILM | Brunswick, Columbus | 5 hr |
| Aug 31, 1:12 AM EDT | Flash Flood Warning | MHX | Duplin, Onslow | 10 hr |
| Aug 31, 1:15 AM EDT | Flash Flood Warning | MHX | Carteret | 10 hr |
| Aug 31, 1:29 AM EDT | Flash Flood Warning | ILM | Bladen, Brunswick, Columbus, New Hanover, Pender | 3 hr |
| Aug 31, 5:16 AM EDT | Flash Flood Warning | MHX | Carteret, Dare, Hyde | 7 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Newport, NC (KMHX), launched 12:00Z, 12.0 hours before the alert went out and 61 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
- 633 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:51 AM EDT | Tornado Watch | SPC | Brunswick, Columbus, New Hanover, Pender | 11 hr |
| Aug 30, 5:36 PM EDT | Mesoscale Discussion | SPC | Brunswick, Carteret, Columbus, Hyde, New Hanover, Onslow and 2 more | 54 min |
Nearby
Tornado Watches in North Carolina, 2023Every tornado watch in 2023
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.