Alert archive / South Carolina / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 51, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Jul 20, 2023, 6:37 PM EDT for Berkeley County, South Carolina. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 20, 2023, 6:37 PM EDT (22:37 UTC)
- Expired
- Jul 20, 2023, 7:30 PM EDT
- In force
- 53 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Berkeley County, SC
The radar
The Charleston,SC radar (KCLX), 118 km from the middle of the area, began a volume at 22:37 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
Charleston AFB, SC (KCHS), launched 12:00Z, 10.6 hours before the alert went out and 33 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
- 569 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1067 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Charleston, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 5:56 PM EDT, 41 minutes earlier.
Area forecast discussion, Jul 20, 5:56 PM EDT, 41 minutes before
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</html>In the hours before
Special weather statement, Jul 20, 6:12 PM EDT, 25 minutes before
Special Weather Statement
National Weather Service Charleston SC
612 PM EDT Thu Jul 20 2023
SCZ045-202300-
Inland Berkeley-
612 PM EDT Thu Jul 20 2023
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY COUNTY...
...MARINERS ON LAKE MOULTRIE SHOULD SEEK SAFE HARBOR...
At 612 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from 8 miles northeast of
Eadytown to Gourdin, and moving southeast at 25 mph.
HAZARD...strong winds 45 to 55 mph.
SOURCE...Radar Indicated.
IMPACT...Expect minor damage to tree limbs and blowing around of
light, unsecured objects.
Some locations in the path of these storms include...
Moncks Corner, Saint Stephen, Bonneau, Jamestown, Southern Lake
Moultrie, Northern Lake Moultrie, Bonneau Beach, and Old Santee Canal
State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters on Lake Moultrie should seek safe harbor immediately. If
caught on the open water, stay as low as possible and wear a personal
flotation device. Remember, if you can hear thunder you are at risk
for being struck by lightning.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3350 7996 3343 7987 3343 7988 3340 7985
3337 7980 3338 7979 3332 7974 3332 7970
3328 7961 3315 8008 3349 8014 3350 8012
3350 8009 3351 8008 3350 8002 3351 7999
TIME...MOT...LOC 2212Z 324DEG 23KT 3352 8007 3350 7987
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPHThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:16 PM EDT | Special Weather Statement | CHS | Jasper | 44 min |
| Jul 20, 3:45 AM EDT | Heat Advisory | CHS | 14 hr | |
| Jul 20, 3:47 AM EDT | Small Craft Advisory | CHS | 24 hr | |
| Jul 20, 6:12 PM EDT | Special Weather Statement | CHS | Berkeley | 48 min |
| Jul 20, 7:29 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston | 61 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2023Every severe thunderstorm warning 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.