Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 68, NWS Columbia, SC

July 2, 2002Aiken County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 2, 2002, 10:28 PM EDT for Aiken County, South Carolina. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 2, 2002, 10:28 PM EDT (02:28 UTC)
Expired: Jul 2, 2002, 11:00 PM EDT
In force: 32 min
Issued by: NWS Columbia, SC
Area: Counties, with a storm outline in the text

County Aiken County, SC

The radar

The Columbia radar (KCAE), 57 km from the middle of the area, began a volume at 02:32 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 00:00Z, 2.5 hours before the alert went out and 147 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: 2523 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 79 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.

677 
WUUS52 KCAE 030228
SVRCAE
SCC003-030300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1028 PM EDT TUE JUL 2 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 1100 PM EDT.

* AT 1027 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF SALLEY..MOVING SOUTHWEST
  AT 10 MPH.

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

THIS STORM WILL PRODUCE DIME SIZE HAIL.

LAT...LON 3349 8124 3365 8134 3353 8169 3331 8155

 NAME

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 Jul 2, 2:45 PM EDT, 7 hours 43 minutes earlier.

Area forecast discussion, Jul 2, 2:45 PM EDT, 7 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
245 PM EDT TUE JUL 2 2002

UPPER LOW OFF THE FLORIDA COAST TO DRIFT NORTH THROUGH THURSDAY. H5
RIDGE HOLDS WEST OF THE AREA. NORTHEAST FLOW ALOFT ALLOWS WEAK VORTS
TO CROSS THE AREA. SURFACE TROUGH TO HOLD ACROSS THE REGION AND
AIRMASS WILL BE MODERATELY UNSTABLE. THE FORECAST WILL KEEP
SCATTERED AFTERNOON AND EVENING CONVECTION THROUGH THURSDAY.
LOWS IN THE LOWER 70S AND HIGHS IN THE LOW/MID 90S FOR WEDNESDAY AND
THURSDAY.

EXTENDED DISCUSSION...
UPPER RIDGE OVER OH VLY FRIDAY WITH UPR LOW DEVELOPING BACK INTO THE
GULF OF MEX. WEAK SURFACE FRONT IN THE AREA. HEIGHTS RISE FOR
SATURDAY. WILL MENTION SCATTERED TSTMS FRIDAY AND WIDELY SCATTERED
SATURDAY. MORE RIDGING SUNDAY AND MONDAY. NEXT FRONT APPROACHES FROM
THE NORTH TUESDAY WITH TROUGH OVER THE NORTHEAST U.S. WILL HOLD OFF
MENTIONING CHANCE OF PRECIP FOR TUESDAY. LOWS IN THE UPPER 60S/LOW
70S AND HIGHS IN THE LOWER 90S.

FCSTID = 10
CAE   72  95  72  94 /  20  30  20  30
AGS   69  94  70  94 /  20  30  20  30
SSC   72  94  72  94 /  20  30  22  30
OGB   72  94  72  94 /  20  30  20  30

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

LM

In the hours before

Local storm report, Jul 2, 4:42 PM EDT, 5 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
442 PM EDT TUE JUL 02 2002

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

345 PM     8E JEFFERSON              SC   WIND DAMAGE
07/02/02   CHESTERFIELD                   SEVERAL TREES DOWN ON
                                          ANGELUS ROAD BETWEEN
                                          JEFFERSON AND
                                          CHESTERFIELD. REPORTED BY
                                          STATE HIGHWAY PATROL AND
                                          PAGELAND POLICE.

DCM

Local storm report, Jul 2, 7:03 PM EDT, 3 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
703 PM EDT TUE JUL 02 2002

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

646 PM     BLYTHEWOOD                SC   WIND DAMAGE
07/02/02   RICHLAND                       RICHLAND COUNTY SHERIFF
                                          REPORTED TREES DOWN,
                                          POWER LINES DOWN, POWER
                                          LINES ON FIRE, ON GROVER
                                          WILSON RD NEAR BLYTHEWOOD
                                          AT 646 PM.

TTH

Local storm report, Jul 2, 7:56 PM EDT, 2 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
756 PM EDT TUE JUL 02 2002

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

725 PM     NEW HOLLAND               SC   .75 INCH HAIL
07/02/02   AIKEN                          HAIL UP TO DIME SIZE
                                          REPORTED BY AIKEN
                                          SHERIFFS OFFICE.

DCM

Local storm report, Jul 2, 10:08 PM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
1008 PM EDT TUE JUL 02 2002

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

630 PM     RIDGEWAY                  SC   WIND DAMAGE
07/02/02   FAIRFIELD                      FAIRFIELD ELECTRIC COOP
                                          REPORTED POWER OUTAGES AT
                                          630 PM DUE TO TREES DOWN
                                          ON POWER LINES ON PARK
                                          ROAD NEAR RIDGEWAY

TTH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 2:48 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield	27 min
Jul 3, 3:06 PM EDT	Severe Thunderstorm Warning	CAE	Lancaster	39 min
Jul 3, 4:36 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield	39 min
Jul 3, 4:41 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	49 min
Jul 3, 5:25 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	50 min
Jul 3, 7:16 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	29 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.