Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 36, NWS Charleston, SC

July 9, 2021Beaufort County, Colleton County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jul 9, 2021, 7:38 PM EDT for Beaufort County, Colleton County, South Carolina. It was in force for 50 min. 1 report 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: Jul 9, 2021, 7:38 PM EDT (23:38 UTC)
Expired: Jul 9, 2021, 8:28 PM EDT
In force: 50 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Beaufort County, SC, Colleton County, SC

The radar

The Charleston,SC radar (KCLX), 27 km from the middle of the area, began a volume at 23:41 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
Jul 9, 7:50 PM EDT	TSTM WND DMG	2 Se White Hall, SC	SC HIGHWAY PATROL REPORTED A TREE DOWN NEAR THE INTERSECTION OF WHITE HALL ROAD AND ABBERLY DRIVE. 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, 11.6 hours before the alert went out and 75 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1551 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

044 
WUUS52 KCHS 092338
SVRCHS
SCC013-029-100045-
/O.NEW.KCHS.SV.W.0036.210709T2338Z-210710T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
738 PM EDT Fri Jul 9 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 845 PM EDT.

* At 738 PM EDT, a severe thunderstorm was located over
  Hendersonville, moving southeast at 15 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...
  Beaufort, Walterboro, Yemassee, Clarendon, Gardens Corner, Ritter,
  Hendersonville, Green Pond, Laurel Bay, Dale, Sheldon, Ashepoo,
  Pocotaligo and White Hall.

This warning includes I-95 in South Carolina between mile markers 42
and 56.
 
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 3266 8041 3244 8078 3258 8084 3261 8083
      3261 8085 3263 8085 3266 8087 3271 8083
      3272 8085 3282 8088 3295 8060
TIME...MOT...LOC 2338Z 319DEG 12KT 3279 8072 

HAIL...1.00IN
WIND...60MPH
 
$$

NED

4 follow-up statements

875 
WWUS52 KCHS 092350
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
750 PM EDT Fri Jul 9 2021

SCC013-029-100045-
/O.CON.KCHS.SV.W.0036.000000T0000Z-210710T0045Z/
Beaufort SC-Colleton SC-
750 PM EDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR BEAUFORT AND COLLETON COUNTIES...

At 750 PM EDT, a severe thunderstorm was located near White Hall,
moving east at 25 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...
Beaufort, Clarendon, Hendersonville, Green Pond, Laurel Bay, Dale,
Gardens Corner, Sheldon, Ashepoo, Ritter and White Hall.

This warning includes I-95 in South Carolina between mile markers 46
and 50.
 
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 3266 8041 3244 8078 3258 8084 3261 8083
      3265 8081 3268 8081 3273 8079 3281 8080
      3290 8057
TIME...MOT...LOC 2350Z 280DEG 20KT 3265 8066 

HAIL...1.00IN
WIND...60MPH
 
$$

NED

077 
WWUS52 KCHS 100009
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
809 PM EDT Fri Jul 9 2021

SCC013-100018-
/O.CAN.KCHS.SV.W.0036.000000T0000Z-210710T0045Z/
Beaufort SC-
809 PM EDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR BEAUFORT COUNTY IS
CANCELLED...
    
The immediate risk for severe weather has ended. 

LAT...LON 3266 8041 3256 8057 3259 8058 3258 8062
      3261 8066 3263 8065 3263 8067 3264 8066
      3265 8068 3267 8067 3272 8071 3278 8070
      3286 8062 3288 8056
TIME...MOT...LOC 0008Z 286DEG 25KT 3269 8050 

$$

SCC029-100045-
/O.CON.KCHS.SV.W.0036.000000T0000Z-210710T0045Z/
Colleton SC-
809 PM EDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR COLLETON COUNTY...

At 808 PM EDT, a severe thunderstorm was located near Ashepoo, moving
east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and powerlines.

Locations impacted include...
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 3266 8041 3256 8057 3259 8058 3258 8062
      3261 8066 3263 8065 3263 8067 3264 8066
      3265 8068 3267 8067 3272 8071 3278 8070
      3286 8062 3288 8056
TIME...MOT...LOC 0008Z 286DEG 25KT 3269 8050 

HAIL...<.75IN
WIND...60MPH
 
$$

NED

770 
WWUS52 KCHS 100020
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
820 PM EDT Fri Jul 9 2021

SCC029-100045-
/O.CON.KCHS.SV.W.0036.000000T0000Z-210710T0045Z/
Colleton SC-
820 PM EDT Fri Jul 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR COLLETON COUNTY...

At 820 PM EDT, a severe thunderstorm was located near Adams Run,
moving southeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and powerlines.

Locations impacted include...
Ashepoo and Green Pond. 

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 3260 8050 3261 8055 3267 8061 3270 8062
      3274 8063 3278 8062 3284 8060 3287 8055
      3266 8041
TIME...MOT...LOC 0020Z 298DEG 15KT 3267 8044 

HAIL...<.75IN
WIND...60MPH
 
$$

NED

342 
WWUS52 KCHS 100028
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
828 PM EDT Fri Jul 9 2021

SCC029-100037-
/O.CAN.KCHS.SV.W.0036.000000T0000Z-210710T0045Z/
Colleton SC-
828 PM EDT Fri Jul 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR PORTIONS OF COLLETON COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and have exited the warned area. Therefore the warning has
been cancelled.  However gusty winds are still possible with this
thunderstorm.

LAT...LON 3260 8050 3261 8055 3267 8061 3270 8062
      3274 8063 3278 8062 3284 8060 3287 8055
      3266 8041
TIME...MOT...LOC 0026Z 319DEG 12KT 3265 8042 

$$

NED

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 5:46 PM EDT	Special Weather Statement	CHS	Allendale, Hampton	29 min
Jul 9, 6:03 PM EDT	Special Weather Statement	CHS	Berkeley, Dorchester	27 min
Jul 9, 6:18 PM EDT	Special Weather Statement	CHS	Hampton	27 min
Jul 9, 7:01 PM EDT	Special Weather Statement	CHS	Hampton	29 min
Jul 9, 7:28 PM EDT	Special Weather Statement	CHS	Colleton	32 min
Jul 9, 7:36 PM EDT	Special Marine Warning	CHS		84 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2021 Every 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.