Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 24, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at May 4, 2021, 6:17 PM EDT for 4 counties in South Carolina. It was in force for 58 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 4, 2021, 6:17 PM EDT (22:17 UTC)
- Expired
- May 4, 2021, 7:15 PM EDT
- In force
- 58 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 84 km from the middle of the area, began a volume at 22:18 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 4, 6:18 PM EDT | TSTM WND DMG | 2 Nnw Ashepoo, SC | TREE IN ROADWAY AT WEE HOPE LOOP AND BONNIE DOON ROAD. TIME ESTIMATED FROM RADAR. |
| May 4, 7:03 PM EDT | TSTM WND DMG | 2 Ene Cottageville, SC | TREE IN ROADWAY AT PEIRCE ROAD AND RHODE DRIVE. TIME ESTIMATED FROM RADAR. |
| May 4, 7:03 PM EDT | TSTM WND DMG | 2 Ne Cottageville, SC | TREE IN ROADWAY AT PEIRCE ROAD AND WHITES AVE. TIME ESTIMATED FROM RADAR. |
| May 4, 7:25 PM EDT | TSTM WND DMG | 1 N Round O, SC | TREE IN ROADWAY AT ROUND O ROAD AND FENNEL DRIVE. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 10.3 hours before the alert went out and 24 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
- 573 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
319
WUUS52 KCHS 042217
SVRCHS
SCC015-019-029-035-042315-
/O.NEW.KCHS.SV.W.0024.210504T2217Z-210504T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
617 PM EDT Tue May 4 2021
The National Weather Service in Charleston has issued a
* Severe Thunderstorm Warning for portions of...
Charleston County in southeastern South Carolina...
Colleton County in southeastern South Carolina...
Berkeley County in southeastern South Carolina...
Dorchester County in southeastern South Carolina...
* Until 715 PM EDT.
* At 617 PM EDT, severe thunderstorms were located along a line
extending from Ritter to near Ashepoo to near Bennetts Point,
moving northeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and powerlines.
* Locations impacted include...
North Charleston, Mount Pleasant, Summerville, Goose Creek,
Hanahan, Walterboro, Edisto Beach, Fort Sumter, Downtown
Charleston, West Ashley, Daniel Island, Givhans Ferry State Park,
Naval Weapons Station Charleston, Johns Island and Ladson.
This warning includes...
I-26 between mile markers 190 and 221.
I-526 between mile markers 11 and 31.
I-95 in South Carolina between mile markers 47 and 50.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3302 7988 3278 7974 3273 7985 3268 7986
3259 7998 3252 8015 3253 8021 3241 8036
3246 8045 3264 8056 3279 8081 3318 8021
TIME...MOT...LOC 2217Z 236DEG 36KT 3280 8066 3269 8048 3259 8042
HAIL...1.00IN
WIND...60MPH
$$2 follow-up statements
088
WWUS52 KCHS 042240
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
640 PM EDT Tue May 4 2021
SCC015-019-029-035-042315-
/O.CON.KCHS.SV.W.0024.000000T0000Z-210504T2315Z/
Charleston SC-Colleton SC-Berkeley SC-Dorchester SC-
640 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CHARLESTON...COLLETON...BERKELEY AND DORCHESTER COUNTIES...
At 639 PM EDT, severe thunderstorms were located along a line
extending from near Cottageville to near Delemar Crossroads to Yonges
Island, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
North Charleston, Mount Pleasant, Summerville, Goose Creek, Hanahan,
Walterboro, Fort Sumter, Downtown Charleston, West Ashley, Daniel
Island, Givhans Ferry State Park, Naval Weapons Station Charleston,
Johns Island, Ladson and I-26/I-526 Interchange.
This warning includes...
I-26 between mile markers 190 and 221.
I-526 between mile markers 11 and 31.
I-95 in South Carolina between mile markers 47 and 50.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3302 7988 3278 7974 3273 7985 3268 7986
3259 7998 3252 8015 3253 8021 3249 8027
3256 8036 3267 8046 3279 8081 3318 8021
TIME...MOT...LOC 2239Z 236DEG 36KT 3291 8047 3280 8029 3270 8023
HAIL...<.75IN
WIND...60MPH
$$029
WWUS52 KCHS 042252
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
652 PM EDT Tue May 4 2021
SCC015-019-029-035-042315-
/O.CON.KCHS.SV.W.0024.000000T0000Z-210504T2315Z/
Charleston SC-Colleton SC-Berkeley SC-Dorchester SC-
652 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CHARLESTON...COLLETON...BERKELEY AND DORCHESTER COUNTIES...
At 651 PM EDT, severe thunderstorms were located along a line
extending from near Givhans to near Delemar Crossroads to near
Hollywood, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
North Charleston, Summerville, Goose Creek, Hanahan, Naval Weapons
Station Charleston, Ladson, Givhans Ferry State Park, Ravenel,
Ridgeville, Cottageville, Givhans, Crowfield Plantation, Jedburg,
Charleston Airport and College Park.
This warning includes I-26 between mile markers 190 and 211.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3302 7988 3288 8006 3275 8035 3284 8073
3318 8021
TIME...MOT...LOC 2251Z 236DEG 36KT 3296 8038 3285 8020 3275 8014
HAIL...<.75IN
WIND...60MPH
$$The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:15 PM EDT | Areal Flood Advisory | CHS | Allendale, Berkeley, Colleton, Dorchester, Hampton | 2 hr |
| May 3, 8:26 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston | 38 min |
| May 3, 9:15 PM EDT | Special Marine Warning | CHS | 60 min | |
| May 3, 10:00 PM EDT | Special Marine Warning | CHS | 2 hr | |
| May 4, 3:38 PM EDT | Special Weather Statement | CHS | Charleston | 37 min |
| May 4, 4:08 PM EDT | Special Weather Statement | CHS | Berkeley | 37 min |
| May 4, 4:15 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley | 25 min |
| May 4, 4:30 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley | 20 min |
| May 4, 4:32 PM EDT | Special Weather Statement | CHS | Dorchester | 28 min |
| May 4, 6:11 PM EDT | Special Weather Statement | CHS | Colleton | 49 min |
| May 4, 6:59 PM EDT | Severe Thunderstorm Warning | CHS | Colleton, Dorchester | 46 min |
| May 4, 7:07 PM EDT | Special Weather Statement | CHS | Berkeley | 38 min |
| May 4, 7:40 PM EDT | Special Weather Statement | CHS | Berkeley, Dorchester | 35 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.