Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 42, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Jul 18, 2021, 3:04 PM EDT for Beaufort County, Colleton County, South Carolina. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2021, 3:04 PM EDT (19:04 UTC)
- Expired
- Jul 18, 2021, 3:45 PM EDT
- In force
- 41 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Beaufort County, SC, Colleton County, SC
The radar
The Charleston,SC radar (KCLX), 57 km from the middle of the area, began a volume at 19:08 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, 7.1 hours before the alert went out and 44 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
- 962 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
234
WUUS52 KCHS 181904
SVRCHS
SCC013-029-181945-
/O.NEW.KCHS.SV.W.0042.210718T1904Z-210718T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
304 PM EDT Sun Jul 18 2021
The National Weather Service in Charleston has issued a
* Severe Thunderstorm Warning for portions of...
Beaufort County in southeastern South Carolina...
Colleton County in southeastern South Carolina...
* Until 345 PM EDT.
* At 304 PM EDT, severe thunderstorms were located along a line
extending from near White Hall to near Clarendon, moving northeast
at 20 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
* Locations impacted include...
Cottageville, Green Pond, Dale, Gardens Corner, Jacksonboro,
Ashepoo, Ritter and White Hall.
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 3293 8040 3291 8041 3289 8039 3287 8040
3284 8039 3281 8040 3279 8043 3274 8045
3270 8041 3267 8042 3248 8080 3278 8073
3297 8042
TIME...MOT...LOC 1904Z 228DEG 19KT 3276 8068 3252 8076
HAIL...0.88IN
WIND...60MPH
$$
MTE2 follow-up statements
530
WWUS52 KCHS 181933
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
333 PM EDT Sun Jul 18 2021
SCC013-181942-
/O.CAN.KCHS.SV.W.0042.000000T0000Z-210718T1945Z/
Beaufort SC-
333 PM EDT Sun Jul 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR BEAUFORT COUNTY IS
CANCELLED...
The immediate risk for severe weather has ended.
LAT...LON 3289 8039 3287 8040 3284 8039 3274 8045
3271 8042 3267 8042 3258 8060 3259 8061
3258 8062 3261 8066 3263 8066 3263 8067
3264 8066 3265 8068 3267 8068 3268 8075
3278 8073 3297 8042
TIME...MOT...LOC 1932Z 245DEG 14KT 3273 8062
$$
SCC029-181945-
/O.CON.KCHS.SV.W.0042.000000T0000Z-210718T1945Z/
Colleton SC-
333 PM EDT Sun Jul 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR COLLETON COUNTY...
At 332 PM EDT, a severe thunderstorm was located over Green Pond,
moving northeast at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
Cottageville, Jacksonboro, Ashepoo, Green Pond, Ritter and White
Hall.
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 3289 8039 3287 8040 3284 8039 3274 8045
3271 8042 3267 8042 3258 8060 3259 8061
3258 8062 3261 8066 3263 8066 3263 8067
3264 8066 3265 8068 3267 8068 3268 8075
3278 8073 3297 8042
TIME...MOT...LOC 1932Z 245DEG 14KT 3273 8062
HAIL...<.75IN
WIND...60MPH
$$252
WWUS52 KCHS 181943
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
343 PM EDT Sun Jul 18 2021
SCC029-181953-
/O.EXP.KCHS.SV.W.0042.000000T0000Z-210718T1945Z/
Colleton SC-
343 PM EDT Sun Jul 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR PORTIONS OF COLLETON COUNTY
WILL EXPIRE AT 345 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.
LAT...LON 3289 8039 3287 8040 3284 8039 3274 8045
3271 8042 3267 8042 3258 8060 3259 8061
3258 8062 3261 8066 3263 8066 3263 8067
3264 8066 3265 8068 3267 8068 3268 8075
3278 8073 3297 8042
TIME...MOT...LOC 1943Z 228DEG 19KT 3277 8057
$$The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 12:17 PM EDT | Severe Thunderstorm Warning | CHS | Allendale | 43 min |
| Jul 18, 1:29 PM EDT | Special Weather Statement | CHS | Bamberg | 31 min |
| Jul 18, 2:11 PM EDT | Special Weather Statement | CHS | Berkeley | 34 min |
| Jul 18, 2:49 PM EDT | Special Weather Statement | CHS | Jasper | 26 min |
| Jul 18, 3:09 PM EDT | Severe Thunderstorm Warning | CHS | Jasper | 55 min |
| Jul 18, 3:17 PM EDT | Special Weather Statement | CHS | Berkeley | 28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.