Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 38, NWS Columbia, SC

April 16, 2011Lee County, Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Apr 16, 2011, 2:11 PM EDT for Lee County, Sumter County, South Carolina. It was in force for 49 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: Apr 16, 2011, 2:11 PM EDT (18:11 UTC)
Expired: Apr 16, 2011, 3:00 PM EDT
In force: 49 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Lee County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 82 km from the middle of the area, began a volume at 18:12 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
Apr 16, 2:17 PM EDT	TSTM WND DMG	2 N Bishopville, SC	SHERIFF REPORTS POWER LINES DOWN AND TRAFFIC LIGHTS OUT NEAR BISHOPVILLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 16, 12:02 PM EDT	Tornado Watch PDS	SPC	11 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 6.2 hours before the alert went out and 145 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: 421 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

071 
WUUS52 KCAE 161811
SVRCAE
SCC061-085-161900-
/O.NEW.KCAE.SV.W.0038.110416T1811Z-110416T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
211 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LEE COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHERN SUMTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 300 PM EDT

* AT 208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 20
  MILES WEST OF BISHOPVILLE...OR 6 MILES SOUTH OF CAMDEN. THIS STORM
  WAS NEARLY STATIONARY.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE BISHOPVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM FOR THE WARNED AREA. IF 
A TORNADO IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN 
A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 3396 8047 3416 8050 3417 8046 3419 8046
      3432 8024 3431 8024 3436 8018 3431 8017
      3421 8010 3419 8011 3417 8014 3415 8015
      3410 8010
TIME...MOT...LOC 1811Z 180DEG 0KT 3418 8059

$$

SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 12:05 AM EDT	Special Weather Statement	CAE	McCormick	55 min
Apr 16, 1:03 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Richland	42 min
Apr 16, 1:26 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Kershaw, Richland, Sumter	49 min
Apr 16, 1:33 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster, Lee	57 min
Apr 16, 1:56 PM EDT	Tornado Warning	CAE	Chesterfield	19 min
Apr 16, 2:17 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Orangeburg, Richland, Sumter	43 min
Apr 16, 2:48 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Lee, Orangeburg, Sumter	42 min
Apr 16, 3:12 PM EDT	Tornado Warning	CAE	Clarendon	33 min
Apr 16, 3:57 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon, Orangeburg	48 min
Apr 16, 4:12 PM EDT	Tornado Warning	CAE	Clarendon	33 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011 Every severe thunderstorm warning in 2011

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.