Alert archive / South Carolina / Tornado Watches in 2023
Tornado Watch 662
The Storm Prediction Center issued this tornado watch at Aug 30, 2023, 10:51 AM EDT for 4 counties in North Carolina; 11 counties in South Carolina. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2023, 10:51 AM EDT (14:51 UTC)
- Expired
- Aug 30, 2023, 10:00 PM EDT
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
Counties Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Allendale County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Williamsburg County, SC
The radar
The Charleston,SC radar (KCLX), 141 km from the middle of the area, began a volume at 14:48 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- 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
- 30%
Warnings issued inside it
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 11:15 AM EDT | Tornado Warning | CHS | Charleston | 30 min |
| Aug 30, 11:43 AM EDT | Tornado Warning | CHS | Charleston, Dorchester | 11 min |
| Aug 30, 3:29 PM EDT | Tornado Warning | CHS | Berkeley, Charleston | 15 min |
| Aug 30, 3:35 PM EDT | Tornado Warning | CHS | Berkeley, Charleston | 25 min |
| Aug 30, 3:38 PM EDT | Tornado Warning | CHS | Charleston, Dorchester | 20 min |
| Aug 30, 3:52 PM EDT | Tornado Warning | CHS | Colleton, Dorchester | 23 min |
| Aug 30, 4:47 PM EDT | Flash Flood Warning | CHS | Allendale, Hampton, Jasper | 3 hr |
| Aug 30, 4:48 PM EDT | Tornado Warning | CHS | Berkeley, Charleston | 27 min |
| Aug 30, 5:16 PM EDT | Tornado Warning | CHS | Berkeley | 29 min |
| Aug 30, 5:19 PM EDT | Tornado Warning | ILM | Georgetown, Horry, Marion | 26 min |
| Aug 30, 5:20 PM EDT | Tornado Warning | CHS | Hampton, Jasper | 25 min |
| Aug 30, 6:14 PM EDT | Tornado Warning | ILM | Brunswick | 31 min |
| Aug 30, 6:26 PM EDT | Flash Flood Warning | CHS | Colleton, Hampton | 4 hr |
| Aug 30, 6:47 PM EDT | Tornado Warning | ILM | Brunswick | 28 min |
| Aug 30, 7:00 PM EDT | Tornado Warning | ILM | Brunswick | 30 min |
| Aug 30, 7:13 PM EDT | Tornado Warning | ILM | Brunswick | 32 min |
| Aug 30, 7:23 PM EDT | Tornado Warning | ILM | Brunswick, New Hanover | 37 min |
| Aug 30, 7:57 PM EDT | Flash Flood Warning | ILM | Georgetown, Horry, Marion | 7 hr |
| Aug 30, 9:25 PM EDT | Flash Flood Warning | ILM | Florence, Marion, Williamsburg | 4 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 2.9 hours before the alert went out and 309 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
- 169 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:36 PM EDT | Mesoscale Discussion | SPC | Brunswick, Carteret, Columbus, Hyde, New Hanover, Onslow and 2 more | 54 min |
| Aug 30, 7:57 PM EDT | Tornado Watch | SPC | Beaufort, Brunswick, Carteret, Columbus, Craven, Dare and 6 more | 11 hr |
| Aug 30, 4:23 AM EDT | Mesoscale Discussion | SPC | Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more | 2 hr |
| Aug 30, 10:11 AM EDT | Mesoscale Discussion | SPC | Beaufort, Berkeley, Charleston, Colleton, Dorchester, Georgetown and 1 more | 3 hr |
| Aug 30, 2:14 PM EDT | Mesoscale Discussion | SPC | Beaufort, Berkeley, Charleston, Colleton, Dorchester, Georgetown and 2 more | 2 hr |
Nearby
Tornado Watches in South Carolina, 2023Tornado 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.