Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at May 4, 2021, 6:59 PM EDT for Colleton County, Dorchester County, South Carolina. It was in force for 46 min. 11 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, 6:59 PM EDT (22:59 UTC)
- Expired
- May 4, 2021, 7:45 PM EDT
- In force
- 46 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 70 km from the middle of the area, began a volume at 23:00 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, 7:00 PM EDT | TSTM WND DMG | 5 Sse Ruffin, SC | TREE IN ROADWAY AT TABOR ROAD AND BELLS HIGHWAY. 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, 7:13 PM EDT | TSTM WND DMG | 3 Nne Walterboro, SC | TREE IN ROADWAY AT COUGAR NATION DR AND JEFFERIES HIGHWAY. |
| May 4, 7:13 PM EDT | TSTM WND DMG | 3 Nne Walterboro, SC | TREE IN ROADWAY AT INDUSTRIAL ROAD AND US15. TIME ESTIMATED BY RADAR. |
| May 4, 7:14 PM EDT | TSTM WND DMG | 4 Nne Walterboro, SC | TREE DOWN AT JEFFERIES HWY AND LAKESHORE DR. TIME ESTIMATED FROM REPORT TIME AND RADAR. |
| May 4, 7:15 PM EDT | TSTM WND DMG | 4 Ssw Canadys, SC | TREE DOWN AT PLEASANT GROVE RD AND MAPLE RIDGE RD. TIME ESTIMATED FROM TIME OF REPORT AND RADAR. |
| May 4, 7:16 PM EDT | TSTM WND DMG | 1 Nne Walterboro, SC | TREE IN ROADWAY AT US15 AND ROBERTSON BLVD. TIME ESTIMATED FROM RADAR. |
| May 4, 7:19 PM EDT | TSTM WND DMG | 3 Wnw Round O, SC | TREE IN ROADWAY AT WELCH CREEK AND COOLERS DAIRY ROAD. VEHICLE COLLIDED WITH THE DOWNED TREE. 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. |
| May 4, 7:28 PM EDT | TSTM WND DMG | 5 N Cottageville, SC | TREE IN ROADWAY AT REHOBOTH ROAD AND MUCKENFUS ROAD. 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, 11.0 hours before the alert went out and 59 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.
916
WUUS52 KCHS 042259
SVRCHS
SCC029-035-042345-
/O.NEW.KCHS.SV.W.0025.210504T2259Z-210504T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
659 PM EDT Tue May 4 2021
The National Weather Service in Charleston has issued a
* Severe Thunderstorm Warning for portions of...
Colleton County in southeastern South Carolina...
Dorchester County in southeastern South Carolina...
* Until 745 PM EDT.
* At 659 PM EDT, severe thunderstorms were located along a line
extending from near Lodge to near Walterboro, moving northeast at
35 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...
Walterboro, Saint George, Givhans Ferry State Park, Dorchester,
Colleton, Ridgeville, Cottageville, Harleyville, Reevesville,
Smoaks, Lodge, Williams, Givhans, Ruffin and Jedburg.
This warning includes...
I-26 between mile markers 171 and 189.
I-95 in South Carolina between mile markers 53 and 85.
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 3327 8047 3326 8043 3326 8037 3325 8035
3320 8033 3318 8030 3315 8032 3306 8020
3291 8044 3285 8073 3305 8104 3310 8095
3306 8090 3309 8088 3313 8089 3333 8051
TIME...MOT...LOC 2259Z 246DEG 30KT 3311 8095 3290 8061
HAIL...1.00IN
WIND...60MPH
$$2 follow-up statements
040
WWUS52 KCHS 042306
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
706 PM EDT Tue May 4 2021
SCC029-035-042345-
/O.CON.KCHS.SV.W.0025.000000T0000Z-210504T2345Z/
Colleton SC-Dorchester SC-
706 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR COLLETON AND DORCHESTER COUNTIES...
At 705 PM EDT, severe thunderstorms were located along a line
extending from near Padgetts to near Ruffin to near Cottageville,
moving northeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and powerlines.
Locations impacted include...
Walterboro, Saint George, Givhans Ferry State Park, Dorchester,
Colleton, Ridgeville, Cottageville, Harleyville, Reevesville, Smoaks,
Lodge, Williams, Givhans, Ruffin and Jedburg.
This warning includes...
I-26 between mile markers 171 and 189.
I-95 in South Carolina between mile markers 53 and 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 3327 8047 3326 8043 3326 8037 3325 8035
3320 8033 3318 8030 3315 8032 3306 8020
3291 8044 3285 8073 3305 8104 3310 8095
3306 8090 3309 8088 3313 8089 3333 8051
TIME...MOT...LOC 2305Z 242DEG 23KT 3312 8091 3296 8079 3291 8051
HAIL...1.25IN
WIND...60MPH
$$853
WWUS52 KCHS 042323
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
723 PM EDT Tue May 4 2021
SCC029-035-042345-
/O.CON.KCHS.SV.W.0025.000000T0000Z-210504T2345Z/
Colleton SC-Dorchester SC-
723 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR COLLETON AND DORCHESTER COUNTIES...
At 722 PM EDT, severe thunderstorms were located along a line
extending from near Reevesville to near Canadys to Walterboro, moving
northeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated. These storms have a history of producing
tree damage across portions of Colleton County.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
Walterboro, Saint George, Givhans Ferry State Park, Dorchester,
Ridgeville, Cottageville, Harleyville, Reevesville, Round O, Givhans,
Jedburg and Canadys.
This warning includes...
I-26 between mile markers 171 and 189.
I-95 in South Carolina between mile markers 53 and 85.
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 3286 8074 3301 8068 3319 8077 3333 8051
3327 8047 3326 8043 3326 8037 3325 8035
3320 8033 3318 8030 3315 8032 3306 8020
3291 8044 3285 8073
TIME...MOT...LOC 2322Z 245DEG 34KT 3323 8069 3303 8060 3289 8067
HAIL...0.75IN
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, 6:17 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston, Colleton, Dorchester | 58 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.