Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Mar 31, 2021, 7:54 PM EDT for Charleston County, Colleton County, Dorchester County, South Carolina. It was in force for 66 min. 2 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
- Mar 31, 2021, 7:54 PM EDT (23:54 UTC)
- Expired
- Mar 31, 2021, 9:00 PM EDT
- In force
- 66 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Charleston County, SC, Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 65 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 31, 8:54 PM EDT | TSTM WND GST 55 | 5 Sw Adams Run, SC | ACE BASIN RAWS REPORTED A 20 FOOT PEAK WIND GUST OF 55 MPH. |
| Mar 31, 8:55 PM EDT | TSTM WND GST 56 | 2 S West Ashley, SC |
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, 11.9 hours before the alert went out and 39 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
- 717 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
955
WUUS52 KCHS 312354
SVRCHS
SCC019-029-035-010100-
/O.NEW.KCHS.SV.W.0012.210331T2354Z-210401T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
754 PM EDT Wed Mar 31 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...
Dorchester County in southeastern South Carolina...
* Until 900 PM EDT.
* At 753 PM EDT, a severe thunderstorm was located near Jacksonboro,
moving east at 30 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, Hanahan, Downtown
Charleston, West Ashley, Fort Sumter, Johns Island, I-26/I-526
Interchange, Ladson, Hollywood, Ravenel, Meggett, Bears Bluff and
Wadmalaw Island.
This warning includes...
I-26 between mile markers 207 and 221.
I-526 between mile markers 11 and 19.
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 3273 7985 3256 8057 3256 8058 3258 8057
3259 8059 3275 8066 3289 8037 3299 8009
TIME...MOT...LOC 2353Z 248DEG 27KT 3272 8045
HAIL...1.00IN
WIND...60MPH
$$3 follow-up statements
241
WWUS52 KCHS 010013
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
813 PM EDT Wed Mar 31 2021
SCC019-029-035-010100-
/O.CON.KCHS.SV.W.0012.000000T0000Z-210401T0100Z/
Charleston SC-Colleton SC-Dorchester SC-
813 PM EDT Wed Mar 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CHARLESTON...COLLETON AND DORCHESTER COUNTIES...
At 812 PM EDT, a severe thunderstorm was located over Ravenel, moving
east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and powerlines.
Locations impacted include...
North Charleston, Mount Pleasant, Summerville, Hanahan, Downtown
Charleston, West Ashley, Fort Sumter, Johns Island, I-26/I-526
Interchange, Ladson, Hollywood, Ravenel, Meggett, Bears Bluff and
Wadmalaw Island.
This warning includes...
I-26 between mile markers 207 and 221.
I-526 between mile markers 11 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3273 7985 3256 8057 3256 8058 3258 8057
3259 8059 3275 8066 3289 8037 3299 8009
TIME...MOT...LOC 0012Z 249DEG 30KT 3278 8026
HAIL...1.00IN
WIND...60MPH
$$672
WWUS52 KCHS 010033
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
833 PM EDT Wed Mar 31 2021
SCC019-029-035-010100-
/O.CON.KCHS.SV.W.0012.000000T0000Z-210401T0100Z/
Charleston SC-Colleton SC-Dorchester SC-
833 PM EDT Wed Mar 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CHARLESTON...COLLETON AND DORCHESTER COUNTIES...
At 832 PM EDT, a severe thunderstorm was located over Magnolia
Gardens, moving east at 30 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, Hanahan, Downtown
Charleston, West Ashley, Fort Sumter, Johns Island, I-26/I-526
Interchange, Ladson, Hollywood, Ravenel, Meggett, Bears Bluff and
Wadmalaw Island.
This warning includes...
I-26 between mile markers 207 and 221.
I-526 between mile markers 11 and 19.
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 3273 7985 3256 8057 3256 8058 3258 8057
3259 8059 3275 8066 3289 8037 3299 8009
TIME...MOT...LOC 0032Z 248DEG 27KT 3284 8009
HAIL...1.00IN
WIND...60MPH
$$548
WWUS52 KCHS 010059
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
859 PM EDT Wed Mar 31 2021
SCC019-029-035-010108-
/O.EXP.KCHS.SV.W.0012.000000T0000Z-210401T0100Z/
Charleston SC-Colleton SC-Dorchester SC-
859 PM EDT Wed Mar 31 2021
...THE SEVERE THUNDERSTORM WARNING FOR CHARLESTON...COLLETON AND
DORCHESTER COUNTIES WILL EXPIRE AT 900 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.
Remember, a Severe Thunderstorm Warning still remains in effect for
coastal Charleston and coastal Colleton.
LAT...LON 3273 7985 3256 8057 3256 8058 3258 8057
3259 8059 3275 8066 3289 8037 3299 8009
TIME...MOT...LOC 0058Z 248DEG 27KT 3291 7988
$$The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 9:08 PM EDT | Coastal Flood Statement | CHS | 3 hr | |
| Mar 31, 3:17 AM EDT | Small Craft Advisory | CHS | 65 hr | |
| Mar 31, 11:32 AM EDT | Marine Dense Fog Advisory | CHS | 6 hr | |
| Mar 31, 2:05 PM EDT | Small Craft Advisory | CHS | 6 hr | |
| Mar 31, 4:04 PM EDT | Special Weather Statement | CHS | Allendale | 26 min |
| Mar 31, 4:26 PM EDT | Special Weather Statement | CHS | Allendale | 34 min |
| Mar 31, 4:57 PM EDT | Special Weather Statement | CHS | Dorchester | 33 min |
| Mar 31, 5:32 PM EDT | Severe Thunderstorm Warning | CHS | Colleton, Dorchester | 58 min |
| Mar 31, 5:58 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Colleton, Dorchester | 62 min |
| Mar 31, 6:37 PM EDT | Special Weather Statement | CHS | Berkeley | 23 min |
| Mar 31, 7:34 PM EDT | Special Weather Statement | CHS | Berkeley | 26 min |
| Mar 31, 7:37 PM EDT | Special Weather Statement | CHS | Colleton | 23 min |
| Mar 31, 7:53 PM EDT | Severe Thunderstorm Warning | CHS | Berkeley, Charleston | 67 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.