Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 24, NWS Columbia, SC

May 12, 2001Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 12, 2001, 5:34 PM EDT for Sumter County, South Carolina. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 12, 2001, 5:34 PM EDT (21:34 UTC)
Expired: May 12, 2001, 6:15 PM EDT
In force: 41 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Sumter County, SC

What was reported inside it

Time	Report	Where	Remark
May 12, 5:58 PM EDT	Thunderstorm Wind 50 E	Sumter, SC	EPD director reported large branches down in and north of the town of Sumter.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.6 hours before the alert went out and 118 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: 295 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 27 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 122135
SVRCAE
SCC085-122215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
534 PM EDT SAT MAY 12 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 615 PM EDT.

* AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTH OF OAKLAND...OR ABOUT 12 MILES
  NORTHWEST OF SUMTER...MOVING SOUTHEAST AT 25 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
    CHERRYVALE.
    MULBERRY.
    MILLWOOD.
    REMBERT

THIS STORM WILL PRODUCE DIME SIZE HAIL AND WIND GUSTS OF 45 TO 55 MPH.

BC/JL

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 May 12, 3:29 PM EDT, 2 hours 5 minutes earlier.

Area forecast discussion, May 12, 3:29 PM EDT, 2 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
329 PM EDT SAT MAY 12 2001

SHORT WAVE INITIATING CONVECTION WILL MOVE EAST OF THE AREA THIS
EVENING. COLD FRONT TO CROSS THE AREA TONIGHT. WILL KEEP A CHANCE OF
SHOWERS/TSTMS UNTIL AROUND MIDNIGHT. UPPER TROUGH SWINGING THROUGH
SUNDAY AND SUNDAY NIGHT..EMBEDDED SHORT WAVE CROSSING SUNDAY NIGHT
INTO MONDAY MORNING. THIS SHOULD PRODUCE A FEW CLOUDS. ETA SHOWING
H8 MOISTURE SUNDAY NIGHT INTO EARLY MONDAY MORNING. SURFACE RIDGE
BUILDS FOR MONDAY.  MOS TEMPS LOOK REASONABLE WITH LOWS IN THE
MID/UPPER 50S TONIGHT AND IN THE MID 40S SUNDAY NIGHT. HIGHS IN THE
UPPER 70S TO LOWER 80S SUNDAY AND MONDAY.

FOR THE EXTENDED...NEXT CHANCE FOR RAIN STILL LOOKS LIKE WEDNESDAY
AS A FRONT CROSSES THE STATE. ENSEMBLE FORECAST INDICATES LOW
CONFIDENCE FOR POPS AND TEMPS ON WEDNESDAY. THURSDAY AND FRIDAY
LOOK DRY WITH CHANCE OF PRECIP AGAIN ON SATURDAY.

FCSTID =V 10
CAE   58  81  46  82 /  30  10   0   0
AGS   57  81  45  83 /  30   0   0   0
SSC   58  81  46  82 /  40  10   0   0
OGB   58  81  46  83 /  40   0   0   0

.CAE...
GA...NONE.
SC...NONE.

In the hours before

Local storm report, May 12, 3:52 PM EDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
352 PM EDT SAT MAY 12 2001

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

335 PM     MARTINEZ                  GA   .75 INCH HAIL
05/12/01   COLUMBIA                       PUBLIC REPORTED DIME
                                          SIZED HAIL IN MARTINEZ
                                          OFF BELLEAIR ROADn NEAR
                                          INTERSTATE 20.

DCM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:35 PM EDT	Severe Thunderstorm Warning	CAE	Lexington	40 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.