Alert archive / South Carolina / Tornado Warnings in 2010

Tornado Warning 8, NWS Columbia, SC

July 11, 2010Lee County, Sumter County, South Carolina

NWS Columbia, SC issued this tornado warning at Jul 11, 2010, 3:53 PM EDT for Lee County, Sumter County, South Carolina. It was in force for 37 min. 2 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: Jul 11, 2010, 3:53 PM EDT (19:53 UTC)
Expired: Jul 11, 2010, 4:30 PM EDT
In force: 37 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Lee County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 76 km from the middle of the area, began a volume at 19:55 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 11, 3:57 PM EDT	HAIL 1.25	9 Sw Bishopville, SC	OFF OF HWY 441 BETWEEN MANVILLE AND WOODROW RDS
Jul 11, 4:05 PM EDT	HAIL 1.75	9 N Sumter, SC	GOLF BALL SIZED HAIL REPORTED ALONG WITH A TREE DOWN NEAR HWY 441 AND COTTON ACRES RD. REPORTED BY SCHP

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 127 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: 1679 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

647 
WFUS52 KCAE 111953
TORCAE
SCC061-085-112030-
/O.NEW.KCAE.TO.W.0008.100711T1953Z-100711T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
353 PM EDT SUN JUL 11 2010

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN LEE COUNTY IN CENTRAL SOUTH CAROLINA
  EASTERN SUMTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 430 PM EDT

* AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES NORTH OF
  MULBERRY...OR ABOUT 8 MILES NORTHEAST OF SUMTER...MOVING SOUTHEAST
  AT 15 MPH.

* THE TORNADO WILL BE NEAR...
  6 MILES NORTHEAST OF MULBERRY BY 405 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE...TOLL FREE 1 877 6 3
3...6 7 7 2.

LAT...LON 3411 8029 3392 8005 3380 8027 3400 8046
      3414 8041
TIME...MOT...LOC 1953Z 296DEG 7KT 3404 8031

$$

TTH

1 follow-up statement

589 
WWUS52 KCAE 112009
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
409 PM EDT SUN JUL 11 2010

SCC061-085-112030-
/O.CON.KCAE.TO.W.0008.000000T0000Z-100711T2030Z/
LEE SC-SUMTER SC-
409 PM EDT SUN JUL 11 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR SUMTER
AND LEE COUNTIES...

AT 400 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS 
TORNADO WAS LOCATED 6 MILES NORTHWEST OF MAYESVILLE...OR 8 MILES 
NORTHEAST OF SUMTER...MOVING SOUTH-SOUTHEAST AT 10 MPH.

THE TORNADO WILL BE NEAR...
  MAYESVILLE BY 420 PM EDT
  ALONG US HIGHWAYS 76 AND 378 BY 425 PM...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 877 6 3
3...6 7 7 2.

LAT...LON 3411 8029 3392 8005 3380 8027 3400 8046
      3414 8041
TIME...MOT...LOC 2007Z 296DEG 7KT 3403 8028

$$

TTH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 3:19 PM EDT	Severe Thunderstorm Warning	CAE	Lee	41 min
Jul 11, 3:33 PM EDT	Severe Thunderstorm Warning	CAE	Lee, Sumter	42 min
Jul 11, 3:54 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	51 min
Jul 11, 3:58 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	40 min
Jul 11, 4:17 PM EDT	Severe Thunderstorm Warning	CAE	Sumter	15 min
Jul 11, 5:13 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	47 min
Jul 11, 5:40 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	50 min
Jul 11, 5:47 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Newberry, Richland, Saluda	43 min
Jul 11, 6:58 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington	47 min

Nearby

Tornado Warnings in South Carolina, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.