Alert archive / South Carolina / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 21, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at Jun 18, 2026, 3:52 PM EDT for Chatham County, Effingham County, Georgia; Beaufort County, Hampton County, Jasper County, South Carolina. It was in force for 38 min. 5 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
- Jun 18, 2026, 3:52 PM EDT (19:52 UTC)
- Expired
- Jun 18, 2026, 4:30 PM EDT
- In force
- 38 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 60.0 mph
Counties Chatham County, GA, Effingham County, GA, Beaufort County, SC, Hampton County, SC, Jasper County, SC
The radar
The Charleston,SC radar (KCLX), 45 km from the middle of the area, began a volume at 19:54 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 |
|---|---|---|---|
| Jun 18, 3:52 PM EDT | TSTM WND DMG | 4 E Marlow, GA | Power lines down across the road near 1980 Low Ground Road. Power outages were reported in the area. Time determined from radar data. |
| Jun 18, 4:07 PM EDT | TSTM WND DMG | 2 N Clyo, GA | A two foot diameter pine tree fell near the intersection of Highway 119 and Reedsville Road. The downed tree blocked all lanes of travel. Time determined from radar data. |
| Jun 18, 4:19 PM EDT | TSTM WND DMG | Robertville, SC | Jasper County Warning Point reported a tree down at the 10000 block of Cotton Hill Road. |
| Jun 18, 4:27 PM EDT | TSTM WND DMG | 3 Nw Bluffton, SC | Tree down at Buckwalter Pkwy at Shell Hall Dr. |
| Jun 18, 4:27 PM EDT | TSTM WND DMG | 3 Wnw Bluffton, SC | Bluffton Fire reported a tree down at 3090 Bluffton Parkway, partially blocking the roadway. Time determined from radar data. |
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, 7.9 hours before the alert went out and 143 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
- 1831 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 659 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
100
WUUS52 KCHS 181952
SVRCHS
GAC051-103-SCC013-049-053-182030-
/O.NEW.KCHS.SV.W.0021.260618T1952Z-260618T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
352 PM EDT Thu Jun 18 2026
The National Weather Service in Charleston has issued a
* Severe Thunderstorm Warning for portions of...
Chatham County in southeastern Georgia...
Effingham County in southeastern Georgia...
Beaufort County in southeastern South Carolina...
Hampton County in southeastern South Carolina...
Jasper County in southeastern South Carolina...
* Until 430 PM EDT.
* At 352 PM EDT, severe thunderstorms were located along a line from
over Egypt to over Bloomingdale, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Pooler, Bluffton, Ridgeland, Springfield, Godley Station, Savannah
International Airport, Jasper, Rincon, Garden City and Port
Wentworth.
This includes the following highways...
I-16 between mile markers 150 and 157. I-95 in Georgia between mile
markers 101 and 112. I-95 in South Carolina between mile markers 2
and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
&&
LAT...LON 3274 8116 3253 8105 3223 8085 3205 8132
3216 8141 3221 8141 3222 8143 3227 8144
3233 8147 3233 8148 3238 8152 3239 8152
3239 8153 3242 8154 3245 8153 3247 8153
3247 8154 3248 8154 3249 8155 3251 8154
TIME...MOT...LOC 1952Z 236DEG 28KT 3243 8146 3230 8141 3212 8130
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ETM2 follow-up statements
981
WWUS52 KCHS 182018
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
418 PM EDT Thu Jun 18 2026
GAC051-103-SCC013-049-053-182030-
/O.CON.KCHS.SV.W.0021.000000T0000Z-260618T2030Z/
Chatham GA-Effingham GA-Beaufort SC-Hampton SC-Jasper SC-
418 PM EDT Thu Jun 18 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR
CHATHAM, EFFINGHAM, BEAUFORT, HAMPTON AND JASPER COUNTIES...
At 418 PM EDT, severe thunderstorms were located along a line from
near Garnett to near Hardeeville, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bluffton, Jasper, Hardeeville, Furman, Scotia, Tillman, Ebenezer,
Switzerland and Tarboro.
This includes I-95 in South Carolina between mile markers 2 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
&&
LAT...LON 3260 8139 3274 8116 3253 8105 3227 8088
3226 8087 3223 8085 3218 8099 3213 8112
3240 8120
TIME...MOT...LOC 1952Z 236DEG 28KT 3244 8145 3232 8133 3213 8129
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ETM967
WWUS52 KCHS 182027
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
427 PM EDT Thu Jun 18 2026
GAC051-103-SCC013-049-053-182037-
/O.EXP.KCHS.SV.W.0021.000000T0000Z-260618T2030Z/
Chatham GA-Effingham GA-Beaufort SC-Hampton SC-Jasper SC-
427 PM EDT Thu Jun 18 2026
...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 430 PM EDT FOR CHATHAM,
EFFINGHAM, BEAUFORT, HAMPTON AND JASPER COUNTIES...
The Severe Thunderstorm Warning that was previously in effect has
been reissued for Beaufort, Hampton, and Jasper Counties and is in
effect until 515 PM EDT. Please refer to that bulletin for the latest
severe weather information.
&&
LAT...LON 3260 8139 3274 8116 3253 8105 3227 8088
3226 8087 3223 8085 3218 8099 3213 8112
3240 8120
TIME...MOT...LOC 2018Z 236DEG 28KT 3255 8125 3243 8113 3224 8110
$$
ETMThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 2:06 PM EDT | Gale Warning | CHS | 24 hr | |
| Jun 18, 2:45 PM EDT | Special Weather Statement | CHS | Evans | 30 min |
| Jun 18, 3:09 PM EDT | Special Weather Statement | CHS | Bryan, Long | 36 min |
| Jun 18, 3:33 PM EDT | Special Weather Statement | CHS | Effingham | 27 min |
| Jun 18, 3:40 PM EDT | Special Weather Statement | CHS | Effingham | 35 min |
| Jun 18, 4:02 PM EDT | Special Weather Statement | CHS | Screven | 28 min |
| Jun 18, 4:08 PM EDT | Special Weather Statement | CHS | Chatham | 52 min |
| Jun 18, 4:24 PM EDT | Special Marine Warning | CHS | 81 min | |
| Jun 18, 5:01 PM EDT | Special Weather Statement | CHS | Jenkins | 29 min |
| Jun 18, 5:20 PM EDT | Special Marine Warning | CHS | 50 min | |
| Jun 18, 5:38 PM EDT | Special Weather Statement | CHS | Jenkins | 52 min |
| Jun 18, 5:47 PM EDT | Special Marine Warning | CHS | 118 min | |
| Jun 18, 5:50 PM EDT | Special Weather Statement | CHS | Long | 25 min |
| Jun 18, 6:07 PM EDT | Special Marine Warning | CHS | 53 min | |
| Jun 18, 6:14 PM EDT | Severe Thunderstorm Warning | CHS | Screven | 46 min |
| Jun 18, 6:20 PM EDT | Special Weather Statement | CHS | Bryan, Chatham, Liberty, Long, McIntosh | 40 min |
| Jun 18, 6:41 PM EDT | Severe Thunderstorm Warning | CHS | Bryan, Liberty, Long, McIntosh | 49 min |
| Jun 18, 7:42 PM EDT | Special Marine Warning | CHS | 60 min | |
| Jun 18, 1:25 PM EDT | Special Weather Statement | CHS | Charleston | 35 min |
| Jun 18, 1:35 PM EDT | Special Weather Statement | CHS | Charleston | 25 min |
| Jun 18, 2:02 PM EDT | Special Weather Statement | CHS | Charleston | 28 min |
| Jun 18, 3:11 PM EDT | Special Weather Statement | CHS | Colleton | 34 min |
| Jun 18, 3:20 PM EDT | Severe Thunderstorm Warning | CHS | Colleton | 40 min |
| Jun 18, 4:26 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Colleton, Hampton, Jasper | 49 min |
| Jun 18, 4:33 PM EDT | Special Weather Statement | CHS | Beaufort | 42 min |
| Jun 18, 4:43 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Colleton, Jasper | 32 min |
| Jun 18, 5:12 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Charleston, Colleton, Dorchester | 48 min |
| Jun 18, 5:41 PM EDT | Severe Thunderstorm Warning | CHS | Colleton, Dorchester | 29 min |
| Jun 18, 6:09 PM EDT | Special Weather Statement | CHS | Berkeley | 36 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2026Severe Thunderstorm Warnings in Georgia, 2026Every severe thunderstorm warning in 2026
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.