Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 22, NWS Columbia, SC

April 9, 2011Chesterfield County, Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Apr 9, 2011, 5:30 PM EDT for Chesterfield County, Lancaster County, South Carolina. It was in force for 60 min. 8 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: Apr 9, 2011, 5:30 PM EDT (21:30 UTC)
Expired: Apr 9, 2011, 6:30 PM EDT
In force: 60 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Chesterfield County, SC, Lancaster County, SC

The radar

The Columbia radar (KCAE), 102 km from the middle of the area, began a volume at 21:33 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 9, 5:45 PM EDT	HAIL 0.88	22 Nnw Lancaster, SC	3.5 MILES ENE OF FORT MILL
Apr 9, 6:09 PM EDT	HAIL 1.25	16 Nnw Lancaster, SC	HAIL REPORTED...BIGGER THAN QUARTER SIZED BUT SMALLER THAN GOLFBALL SIZED...AT INDIAN LAND AMOCO. ALSO...SEVERAL CARS WITH BROKEN WINDSHIELDS.
Apr 9, 6:15 PM EDT	HAIL 1.75	10 W Pageland, SC	GOLF BALL SIZE HAIL COVERING THE GROUND REPORTED AT THE M AND R MINI MART.
Apr 9, 6:15 PM EDT	HAIL 1.75	Lancaster, SC	LANCASTER EMA REPORTED 3 SEPARATE EPISODES OF HAIL. GOLF BALL SIZED HAIL OCCURRED 615-630 PM. 1.5 TO 2.0 INCH HAIL OCCURRED 710-720 PM. PEA TO MARBLE SIZED OCCURRED 730-740 PM. HAIL WAS COVERING THE GROUND. ALSO THERE WAS A TREE KNOCKED DOWN BY THE STORM AT TH
Apr 9, 6:15 PM EDT	HAIL 2	8 Nnw Lancaster, SC	HAIL MEASURING 2.00 INCHES REPORTED AT ANDREW JACKSON STATE PARK.
Apr 9, 6:15 PM EDT	HAIL 2.5	9 Nnw Lancaster, SC	HAM RADIO OPERATOR REPORTED TENNIS BALL SIZE HAIL 1 MILE SOUTH OF THE INTERSECTION OF STATE ROUTE 5 AND STATE ROUTE 75 NEAR VAN WYCK.
Apr 9, 6:27 PM EDT	HAIL 1.5	9 Ene Lancaster, SC	PUBLIC REPORTED 1.50 INCH HAIL THAT COVERED THE GROUND AT THE EXPRESS MART.
Apr 9, 6:30 PM EDT	HAIL 1	Lancaster, SC

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 9, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.5 hours before the alert went out and 162 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 704 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 256 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.

094 
WUUS52 KCAE 092130
SVRCAE
SCC025-057-092230-
/O.NEW.KCAE.SV.W.0022.110409T2130Z-110409T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
530 PM EDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 630 PM EDT

* AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED 35 MILES NORTHWEST OF
  LANCASTER...OR 11 MILES NORTHEAST OF YORK...AND MOVING SOUTHEAST AT
  35 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE PAGELAND...
  LANCASTER...IRWIN...HEATH SPRINGS AND ELGIN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

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.

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

&&

LAT...LON 3494 8078 3482 8079 3481 8033 3453 8073
      3453 8076 3466 8089 3470 8087 3475 8089
      3479 8088 3482 8090 3484 8087 3490 8088
      3493 8087 3501 8091 3505 8090 3506 8090
TIME...MOT...LOC 2129Z 306DEG 35KT 3513 8112

$$

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 6:01 PM EDT	Tornado Warning	CAE	Lancaster	44 min
Apr 9, 6:31 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Lancaster	44 min
Apr 9, 6:41 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	49 min
Apr 9, 7:15 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster, Lee	45 min
Apr 9, 7:51 PM EDT	Areal Flood Advisory	CAE	Chesterfield, Kershaw, Lancaster	114 min
Apr 9, 7:58 PM EDT	Severe Thunderstorm Warning	CAE	Lee, Sumter	47 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.