Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 9, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Mar 31, 2021, 5:32 PM EDT for Colleton County, Dorchester County, South Carolina. It was in force for 58 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, 5:32 PM EDT (21:32 UTC)
- Expired
- Mar 31, 2021, 6:30 PM EDT
- In force
- 58 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), 77 km from the middle of the area, began a volume at 21:36 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, 5:54 PM EDT | HAIL 1 | Canadys, SC | CANADYS FIRE DEPARTMENT REPORTS QUARTER SIZED HAIL. |
| Mar 31, 6:34 PM EDT | HAIL 0.75 | 3 S Dorchester, SC | PEA TO DIME SIZED HAIL REPORTED OFF ZION ROAD. |
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, 9.5 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
- 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.
585
WUUS52 KCHS 312132
SVRCHS
SCC029-035-312230-
/O.NEW.KCHS.SV.W.0009.210331T2132Z-210331T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
532 PM EDT Wed Mar 31 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 630 PM EDT.
* At 532 PM EDT, a severe thunderstorm was located over Smoaks,
moving northeast 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...
Saint George, Dorchester, Harleyville, Reevesville, Smoaks,
Williams, Ruffin and Canadys.
This warning includes...
I-26 between mile markers 171 and 188.
I-95 in South Carolina between mile markers 64 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 3333 8050 3328 8049 3326 8043 3326 8036
3325 8035 3320 8033 3318 8030 3315 8032
3312 8029 3295 8084 3309 8089 3310 8088
3313 8089 3333 8051
TIME...MOT...LOC 2132Z 240DEG 24KT 3306 8080
HAIL...1.00IN
WIND...60MPH
$$
SPR3 follow-up statements
834
WWUS52 KCHS 312144
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
544 PM EDT Wed Mar 31 2021
SCC029-035-312230-
/O.CON.KCHS.SV.W.0009.000000T0000Z-210331T2230Z/
Colleton SC-Dorchester SC-
544 PM EDT Wed Mar 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR COLLETON AND DORCHESTER COUNTIES...
At 544 PM EDT, a severe thunderstorm was located near Canadys, moving
northeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and powerlines.
Locations impacted include...
Saint George, Dorchester, Harleyville, Reevesville and Canadys.
This warning includes...
I-26 between mile markers 171 and 188.
I-95 in South Carolina between mile markers 64 and 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3333 8050 3328 8049 3326 8043 3326 8036
3325 8035 3320 8033 3318 8030 3315 8032
3312 8029 3299 8073 3316 8081 3333 8051
TIME...MOT...LOC 2144Z 243DEG 24KT 3309 8071
HAIL...1.00IN
WIND...60MPH
$$
SPR001
WWUS52 KCHS 312200
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
600 PM EDT Wed Mar 31 2021
SCC029-035-312230-
/O.CON.KCHS.SV.W.0009.000000T0000Z-210331T2230Z/
Colleton SC-Dorchester SC-
600 PM EDT Wed Mar 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR COLLETON AND DORCHESTER COUNTIES...
At 559 PM EDT, a severe thunderstorm was located over Canadys, moving
east at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated. At 554 pm EDT quarter sized hail was
reported near Canadys.
IMPACT...Minor hail damage to
vehicles is possible. Expect wind damage to trees and
powerlines.
Locations impacted include...
Saint George, Dorchester, Harleyville and Canadys.
This warning includes...
I-26 between mile markers 177 and 188.
I-95 in South Carolina between mile markers 64 and 77.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so.
&&
LAT...LON 3326 8043 3326 8036 3325 8035 3320 8033
3318 8030 3315 8032 3312 8029 3299 8073
3315 8073
TIME...MOT...LOC 2159Z 272DEG 21KT 3307 8058
HAIL...1.25IN
WIND...60MPH
$$
SPR109
WWUS52 KCHS 312221
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
621 PM EDT Wed Mar 31 2021
SCC029-035-312231-
/O.EXP.KCHS.SV.W.0009.000000T0000Z-210331T2230Z/
Colleton SC-Dorchester SC-
621 PM EDT Wed Mar 31 2021
...THE SEVERE THUNDERSTORM WARNING FOR COLLETON AND DORCHESTER
COUNTIES WILL EXPIRE AT 630 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.
LAT...LON 3326 8043 3326 8036 3325 8035 3320 8033
3318 8030 3315 8032 3312 8029 3299 8073
3315 8073
TIME...MOT...LOC 2221Z 240DEG 24KT 3314 8044
$$
SPRThe 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, 5:58 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 |
| Mar 31, 7:54 PM EDT | Severe Thunderstorm Warning | CHS | Charleston, Colleton, Dorchester | 66 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.