Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 4, NWS Columbia, SC

January 21, 2017Calhoun County, Clarendon County, Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jan 21, 2017, 4:38 PM EST for Calhoun County, Clarendon County, Orangeburg County, South Carolina. It was in force for 67 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: Jan 21, 2017, 4:38 PM EST (21:38 UTC)
Expired: Jan 21, 2017, 5:45 PM EST
In force: 67 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calhoun County, SC, Clarendon County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 95 km from the middle of the area, began a volume at 21:39 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 21, 1:51 PM EST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.6 hours before the alert went out and 63 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: 138 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 581 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

517 
WUUS52 KCAE 212138
SVRCAE
SCC017-027-075-212245-
/O.NEW.KCAE.SV.W.0004.170121T2138Z-170121T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
438 PM EST SAT JAN 21 2017

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Southeastern Calhoun County in central South Carolina...
  Southwestern Clarendon County in central South Carolina...
  Southeastern Orangeburg County in central South Carolina...

* Until 545 PM EST

* At 437 PM EST, a severe thunderstorm was located near Bowman, or 8
  miles southeast of Orangeburg, moving east at 25 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Orangeburg, Holly Hill, Branchville, Bowman, Elloree, Santee,
  Eutawville, Rowesville, Vance, Cordova, Wilkinson Heights and
  Edisto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

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

If on or near Lake Marion, get away from the water and move indoors 
or inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8015 3346 8016 3345 8017 3345 8020
      3344 8020 3345 8022 3330 8025 3327 8030
      3328 8035 3326 8036 3326 8043 3329 8049
      3333 8049 3333 8051 3319 8077 3346 8094
      3361 8046 3346 8013
TIME...MOT...LOC 2137Z 259DEG 22KT 3339 8078 

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

CJR

4 follow-up statements

190 
WWUS52 KCAE 212155
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
455 PM EST SAT JAN 21 2017

SCC017-027-075-212245-
/O.CON.KCAE.SV.W.0004.000000T0000Z-170121T2245Z/
Calhoun SC-Clarendon SC-Orangeburg SC-
455 PM EST SAT JAN 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR SOUTHEASTERN CALHOUN...SOUTHWESTERN CLARENDON AND SOUTHEASTERN
ORANGEBURG COUNTIES...

At 454 PM EST, a severe thunderstorm was located near Elloree, or 19
miles east of Brookdale, moving east at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Holly Hill, Bowman, Elloree, Santee, Eutawville and Vance. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

If on or near Lake Marion, get away from the water and move indoors 
or inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8015 3346 8016 3345 8017 3345 8020
      3344 8020 3345 8022 3330 8025 3327 8030
      3328 8035 3326 8036 3326 8043 3329 8049
      3333 8049 3333 8051 3324 8069 3348 8077
      3361 8046 3346 8013
TIME...MOT...LOC 2154Z 251DEG 26KT 3348 8050 

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

CJR

949 
WWUS52 KCAE 212210
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
510 PM EST SAT JAN 21 2017

SCC017-212219-
/O.CAN.KCAE.SV.W.0004.000000T0000Z-170121T2245Z/
Calhoun SC-
510 PM EST SAT JAN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
Calhoun County therefore the warning has been cancelled.

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8020 3344 8020 3345 8022 3330 8025
      3327 8030 3328 8035 3326 8036 3326 8043
      3329 8049 3333 8049 3333 8051 3352 8058
      3356 8053 3354 8051 3356 8050 3357 8051
      3361 8046 3346 8014
TIME...MOT...LOC 2209Z 259DEG 22KT 3350 8039 

$$

SCC027-075-212245-
/O.CON.KCAE.SV.W.0004.000000T0000Z-170121T2245Z/
Clarendon SC-Orangeburg SC-
510 PM EST SAT JAN 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR SOUTHWESTERN CLARENDON AND SOUTHEASTERN ORANGEBURG COUNTIES...

At 509 PM EST, a severe thunderstorm was located 7 miles south of
Summerton, or 16 miles southwest of Manning, moving east at 25 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Holly Hill, Elloree, Santee, Eutawville and Vance. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

If on or near Lake Marion, get away from the water and move indoors 
or inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8020 3344 8020 3345 8022 3330 8025
      3327 8030 3328 8035 3326 8036 3326 8043
      3329 8049 3333 8049 3333 8051 3352 8058
      3356 8053 3354 8051 3356 8050 3357 8051
      3361 8046 3346 8014
TIME...MOT...LOC 2209Z 259DEG 22KT 3350 8039 

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

CJR

213 
WWUS52 KCAE 212227
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
527 PM EST SAT JAN 21 2017

SCC027-075-212245-
/O.CON.KCAE.SV.W.0004.000000T0000Z-170121T2245Z/
Clarendon SC-Orangeburg SC-
527 PM EST SAT JAN 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EST
FOR SOUTH CENTRAL CLARENDON AND EAST CENTRAL ORANGEBURG COUNTIES...

At 526 PM EST, a severe thunderstorm was located near Eastern Lake
Marion, or 16 miles south of Manning, moving northeast at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Eutawville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

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

If on or near Lake Marion, get away from the water and move indoors 
or inside a vehicle. remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8020 3344 8020 3345 8022 3330 8025
      3337 8043 3357 8036 3346 8014
TIME...MOT...LOC 2226Z 234DEG 28KT 3346 8025 

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

CJR

292 
WWUS52 KCAE 212240
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
540 PM EST SAT JAN 21 2017

SCC027-075-212249-
/O.EXP.KCAE.SV.W.0004.000000T0000Z-170121T2245Z/
Clarendon SC-Orangeburg SC-
540 PM EST SAT JAN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLARENDON AND
EAST CENTRAL ORANGEBURG COUNTIES WILL EXPIRE AT 545 PM EST...
                
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.

A tornado watch remains in effect until 700 PM EST for central South
Carolina.

LAT...LON 3345 8020 3344 8020 3345 8022 3330 8025
      3337 8043 3357 8036 3346 8014
TIME...MOT...LOC 2239Z 259DEG 22KT 3347 8016 

$$

CJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 1:53 AM EST	Dense Fog Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	9 hr
Jan 21, 12:07 PM EST	Special Weather Statement	CAE	Barnwell	38 min
Jan 21, 1:00 PM EST	Special Weather Statement	CAE	Calhoun	30 min
Jan 21, 3:43 PM EST	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	62 min
Jan 21, 3:50 PM EST	Tornado Warning	CAE	Bamberg, Barnwell, Orangeburg	25 min
Jan 21, 4:15 PM EST	Tornado Warning	CAE	Orangeburg	17 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017 Every severe thunderstorm warning in 2017

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.