Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 78, NWS Columbia, SC

September 22, 2021Kershaw County, Richland County, Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Sep 22, 2021, 5:53 PM EDT for Kershaw County, Richland County, Sumter County, South Carolina. It was in force for 52 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: Sep 22, 2021, 5:53 PM EDT (21:53 UTC)
Expired: Sep 22, 2021, 6:45 PM EDT
In force: 52 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kershaw County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 33 km from the middle of the area, began a volume at 21:53 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
Sep 22, 6:07 PM EDT	TSTM WND DMG	2 Sse Elgin, SC	FAIRFIELD ELECTRIC COOP REPORTED A TREE FELL AND KNOCKED DOWN POWER LINES NEAR STEVEN CAMPBELL RD AND WATER TOWER RD. TIME ESTIMATED BY RADAR.

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, 9.9 hours before the alert went out and 150 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: 773 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

308 
WUUS52 KCAE 222153
SVRCAE
SCC055-079-085-222245-
/O.NEW.KCAE.SV.W.0078.210922T2153Z-210922T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
553 PM EDT Wed Sep 22 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Sumter County in central South Carolina...
  Northeastern Richland County in central South Carolina...
  Southwestern Kershaw County in central South Carolina...

* Until 645 PM EDT.

* At 552 PM EDT, a severe thunderstorm was located over Fort Jackson,
  or near Forest Acres, moving northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Columbia, Forest Acres, Camden, Dentsville, Arcadia Lakes, Lugoff,
  Woodfield, Sesquicentennial State Park, Villages at Sandhill, Fort
  Jackson, Elgin, Fort Jackson Wildcat Road, Boykin and Fort Jackson
  Cantonment Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3394 8091 3403 8098 3431 8069 3415 8051
TIME...MOT...LOC 2152Z 230DEG 24KT 3403 8088 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

awp

2 follow-up statements

441 
WWUS52 KCAE 222208
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
608 PM EDT Wed Sep 22 2021

SCC085-222217-
/O.CAN.KCAE.SV.W.0078.000000T0000Z-210922T2245Z/
Sumter SC-
608 PM EDT Wed Sep 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUMTER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3408 8077 3414 8086 3431 8069 3416 8052
TIME...MOT...LOC 2207Z 230DEG 24KT 3410 8079 

$$

SCC055-079-222245-
/O.CON.KCAE.SV.W.0078.000000T0000Z-210922T2245Z/
Richland SC-Kershaw SC-
608 PM EDT Wed Sep 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHEASTERN RICHLAND AND SOUTHWESTERN KERSHAW COUNTIES...

At 607 PM EDT, a severe thunderstorm was located near Elgin, or 9
miles east of Dentsville, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Camden, Lugoff and Elgin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3408 8077 3414 8086 3431 8069 3416 8052
TIME...MOT...LOC 2207Z 230DEG 24KT 3410 8079 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

awp

997 
WWUS52 KCAE 222233
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
633 PM EDT Wed Sep 22 2021

SCC079-222242-
/O.CAN.KCAE.SV.W.0078.000000T0000Z-210922T2245Z/
Richland SC-
633 PM EDT Wed Sep 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RICHLAND COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. **! Therefore, the warning has been cancelled.

LAT...LON 3414 8067 3422 8074 3431 8069 3416 8052
TIME...MOT...LOC 2232Z 230DEG 24KT 3421 8063 

$$

SCC055-222245-
/O.CON.KCAE.SV.W.0078.000000T0000Z-210922T2245Z/
Kershaw SC-
633 PM EDT Wed Sep 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SOUTH CENTRAL KERSHAW COUNTY...

At 632 PM EDT, a severe thunderstorm was located near Lugoff, or near
Camden, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Camden and Lugoff. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3414 8067 3422 8074 3431 8069 3416 8052
TIME...MOT...LOC 2232Z 230DEG 24KT 3421 8063 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 5:38 PM EDT	Special Weather Statement	CAE	Calhoun, Richland	22 min
Sep 22, 6:23 PM EDT	Special Weather Statement	CAE	Kershaw	37 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.