Alert archive / South Carolina / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 101, NWS Columbia, SC

June 18, 2005Lexington County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jun 18, 2005, 7:58 PM EDT for Lexington County, South Carolina. It was in force for 21 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: Jun 18, 2005, 7:58 PM EDT (23:58 UTC)
Expired: Jun 18, 2005, 8:19 PM EDT
In force: 21 min
Issued by: NWS Columbia, SC
Area: Counties, with a storm outline in the text

County Lexington County, SC

The radar

The Columbia radar (KCAE), 12 km from the middle of the area, began a volume at 00:03 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
Jun 18, 8:00 PM EDT	HAIL 1.25	Gaston, SC

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 12.0 hours before the alert went out and 146 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: 238 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1186 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 63 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.

000 
WUUS52 KCAE 182358
SVRCAE
SCC063-190030-
/O.NEW.KCAE.SV.W.0101.050618T2358Z-050619T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
758 PM EDT SAT JUN 18 2005

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 830 PM EDT

* AT 748 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM CAPABLE
  OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED NEAR   
GASTON...OR ABOUT 10 MILES SOUTH OF CAYCE. THIS STORM WAS MOVING 
NORTHEAST AT 5 MILES AN HOUR. HEAVY RAIN WILL ALSO OCCUR. 

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  GASTON...

THIS STORM HAS A HISTORY OF PRODUCING LARGE 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, AT 1, 800,
7 7 5, 7 1 9 9.

LAT...LON 3380 8120 3380 8108 3376 8106 3389 8100
      3395 8104 3391 8110

$$

LM

1 follow-up statement

000 
WWUS52 KCAE 190019
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
818 PM EDT SAT JUN 18 2005

SCC063-190028-
/O.CAN.KCAE.SV.W.0101.000000T0000Z-050619T0030Z/
LEXINGTON SC-
818 PM EDT SAT JUN 18 2005

...THE SEVERE THUNDERSTORM WARNING FOR LEXINGTON COUNTY IS
CANCELLED...

THE THUNDERSTORM OVER SOUTHERN LEXINGTON COUNTY HAS WEAKENED.

LAT...LON 3380 8120 3380 8108 3376 8106 3389 8100
      3395 8104 3391 8110

$$

LM

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 2:43 PM EDT, 5 hours 15 minutes earlier.

Area forecast discussion, Jun 18, 2:43 PM EDT, 5 hours 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
243 PM EDT SAT JUN 18 2005

.SHORT TERM (TONIGHT THROUGH TUESDAY NIGHT)...
OLD FRONTAL BOUNDRY FROM NEAR CHS EASTWARD TO JUST WEST OF THE
SAVANNAH RIVER WILL MOVE LITTLE THIS EVENING. TSTMS HAVE BEEN
DEVELOPING ALONG THE BOUNDRY PAST FEW HRS. AIRMASS IS BECOMING
MODERATELY UNSTABLE AND WE MAY SEE A FEW SEVERE THUNDERSTORMS NEAR
THE SAVANNAH RIVER THIS AFTERNOON/EVENING.  WILL WAIT TIL CLOSER TO
RELEASE TIME TO SET WX & POPS AS DEWPOINTS MIXING OUT.

MODELS IN GENERAL AGREEMENT IN UPPER TORF CONTINUING OVER THE
SOUTHEAST THRU MON THEN MOVING OFF SHORE TUE. ETA A LITTLE FASTER
WITH EASTWARD MOVEMENT. BOTH MODELS CONTINUE UPPER LEVEL COLD POOL
OVER THE SOUTHEAST...GFS IS A LITTLE COOLER BUT BOTH CLOSE. ETA POPS
LOOK A LITTLE HIGH AND THE GFS A LITTLE LOW. WITH SIMIALIAR MOISTURE
FIELDS WILL GO WITH A CONSENSUS POPS...30/40 POP AFTERNOON/EVENING
AND 20 POP LATE NIGHT... THRU THE PERIOD. LITTLE CHANGE IN FORECAST
TEMPERATURES.

&&

.LONG TERM (WEDNESDAY THROUGH SATURDAY)...
UPPER LEVEL NORTHWESTERLY FLOW CONTINUES THRU THE PERIOD WITH WEAK
SHORTWAVES MOVING TO THE EAST. UPPER RIDGE TO WEST WORKS SLOWLY
EASTWARD. WEAK COLD FRONT ALONG THE NC/VA BORDER WED WILL SLIP THRU
THE CWA WED AFTERNOON/NIGHT. FRONTAL SYSTEM CONTINUES SLOWLY
SOUTHWARD AND DISSIPATES OVER GA FRI. BEST CHANCES OF PCPN APPEAR TO
BE WED AFTERNOON AND EVENING WITH APPROACHING FRONTAL SYSTEM WITH
SOME LOW LEVEL MOISTURE CONVERGENCE AND MOISTURE TRANSPORT. WILL
CONTINUE SMALL POP THU AND FRI AFTERNOON NEAR THE SAVANNAH RIVER
WITH OLD DISSIPATING FRONTAL SYSTEM IN THE AREA.

&&

.AVIATION...
STALLED FRONT ALONG SC COAST WITH STRONG UPPER LEVEL DISTURBANCE
APPROACHING FROM THE NORTHWEST. SCATTERED THUNDERSTORMS WILL DEVELOP THIS
AFTERNOON AND EVENING...WITH SOME STORMS APPROACHING SEVERE LIMITS
WITH 60 MPH WIND GUSTS AND LARGE HAIL POSSIBLE ESPECIALLY SOUTH OF
CAE. MVFR CONDITIONS IN VICINITY OF STORMS...VFR ELSEWHERE THROUGH
05Z SUNDAY. SOME PATCHY FOG OVERNIGHT ESPECIALLY IN AREAS WHERE RAIN
OCCURRED AND NEAR THE SAVANNAH RIVER. SCATTERED STORMS POSSIBLE
AGAIN BY SUNDAY AFTERNOON. MVFR CONDITIONS IN VICINITY OF STORMS.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
GA...NONE.
&&

25/25/22

Hazardous weather outlook, Jun 18, 4:09 AM EDT, 15 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
409 AM EDT SAT JUN 18 2005

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-190809-
AIKEN SC-BAMBERG SC-BARNWELL SC-BURKE GA-CALHOUN SC-CHESTERFIELD SC-
CLARENDON SC-COLUMBIA GA-EDGEFIELD SC-FAIRFIELD SC-KERSHAW SC-
LANCASTER SC-LEE SC-LEXINGTON SC-LINCOLN GA-MCCORMICK SC-MCDUFFIE GA-
NEWBERRY SC-ORANGEBURG SC-RICHLAND SC-RICHMOND GA-SALUDA SC-
SUMTER SC-
409 AM EDT SAT JUN 18 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MIDLANDS OF SOUTH CAROLINA
AND THE CENTRAL SAVANNAH RIVER AREA OF GEORGIA.

.DAY ONE...
SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON. MAIN
THREAT HAIL.

.DAYS TWO THROUGH SEVEN...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

In the hours before

Local storm report, Jun 18, 7:49 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
749 PM EDT SAT JUN 18 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0745 PM     HAIL             GASTON                  33.82N 81.10W
06/18/2005  1.25 INCH        LEXINGTON          SC   PUBLIC

            PUBLIC REPORTED HALF DOLLAR SIZED HAIL IN DOWNTOWN
            GASTON.

0745 PM     HAIL             SWANSEA                 33.74N 81.11W
06/18/2005  0.88 INCH        LEXINGTON          SC   PUBLIC

            REPORTED BY PUBLIC IN DOWNTOWN SWANSEA.

0747 PM     HAIL             2 NE SWANSEA            33.76N 81.08W
06/18/2005  1.75 INCH        LEXINGTON          SC   PUBLIC

            GOLF BALL SIZED HAIL 2 MILES NNE OF SWANSEA REPORTED BY
            PUBLIC.

&&

KILMER

Local storm report, Jun 18, 7:54 PM EDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
754 PM EDT SAT JUN 18 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0750 PM     HAIL             GASTON                  33.82N 81.10W
06/18/2005  1.75 INCH        LEXINGTON          SC   PUBLIC

            HAIL COVERING THE GROUND NEAR US 321 IN SWANSEA. AT TIMES
            ALL HAIL AND NO RAIN.

&&

KILMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 6:03 PM EDT	Severe Thunderstorm Warning	CAE	Barnwell	27 min
Jun 18, 6:24 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg	36 min
Jun 18, 7:25 PM EDT	Severe Thunderstorm Warning	CAE	Lexington	35 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2005 Every severe thunderstorm warning in 2005

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.