Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 20, NWS Wilmington, NC

April 17, 2000Darlington County, Marlboro County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Apr 17, 2000, 10:08 PM EDT for Darlington County, Marlboro County, South Carolina. It was in force for 37 min. 4 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Apr 17, 2000, 10:08 PM EDT (02:08 UTC)
Expired: Apr 17, 2000, 10:45 PM EDT
In force: 37 min
Issued by: NWS Wilmington, NC
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Darlington County, SC, Marlboro County, SC

The radar

The Columbia radar (KCAE), 123 km from the middle of the area, began a volume at 02:15 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 17, 10:18 PM EDT	Hail 0.88	Hartsville, SC	Trained spotter reported .88 inch hail 2 miles north of Hartsville. As the storm moved to Hartsville the hail size increased to 1 inch.
Apr 17, 10:30 PM EDT	Hail 1.5	Darlington, SC	Darlington coop observer reported pecan size hail.
Apr 17, 10:55 PM EDT	Hail 0.75	Darlington, SC	Trained spotter reported dime size hail.
Apr 17, 10:55 PM EDT	Hail 0.75	Mc Coll, SC	Trained spotter reported dime size hail.

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 17, 7:30 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.1 hours before the alert went out and 176 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: 1632 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KILM 180209
SVRILM
SCC031-069-180245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
1008 PM EDT MON APR 17 2000

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DARLINGTON COUNTY IN NORTHEAST SOUTH CAROLINA
  MARLBORO COUNTY IN NORTHEAST SOUTH CAROLINA

* UNTIL 1045 PM EDT

* AT 1008 PM EDT...A TRAINED WEATHER SPOTTER REPORTED SEVERE
  THUNDERSTORMS WITH LARGE HAIL ALONG A LINE EXTENDING FROM 3 MILES
  NORTH OF MCCOLL TO 3 MILES WEST OF BLENHEIM TO 3 MILES SOUTHWEST OF
  OATS...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR
  AUBURN AT 1010 PM EDT
  LAMAR AT 1015 PM EDT
  CLIO AT 1020 PM EDT
  DARLINGTON AT 1030 PM EDT

HAIL UP TO THE SIZE OF QUARTERS IS EXPECTED FROM THIS STORM. IF YOU
ARE IN THE STORMS PATH...SEEK SHELTER INDOORS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN WILMINGTON NC.

LAT...LON 3436 8029 3434 8021 3436 8021 3436 8018
          3409 8008 3434 7965 3463 7945 3480 7968
          3480 7976 3471 7980 3462 7979 ~3453 7983
          3448 7990 3450 7999

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 Wilmington, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 17, 8:53 PM EDT, 1 hour 15 minutes earlier.

Area forecast discussion, Apr 17, 8:53 PM EDT, 1 hour 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON NC
853 PM EDT MON APR 17 2000

SFC LOW HAS BEEN DROPPING SE INTO UPSTATE SC LAST SEVERAL HOURS AND
3-HR PRES CHANGE INDICATES A CONTINUED SE MOVEMENT. LI -4 OR SO
ACROSS THE ENTIRE CWA AND PVA SHOULD KEEP CONVECTION GOING FOR
SEVERAL MORE HOURS. INITIAL BAND OF SHRA/TSRA IS CURRENTLY PUSHING
THROUGH WILLIAMSBURG...FLORENCE AND DARLINGTON COUNITES. SOME
ADDITIONAL TSRA DEVELOPMENT IS OCCURRING CLOSER TO THE LOW CENTER
AND MAY BE ENHANCED BY FAVORABLE POSITION OF MID/UPR JET. MARGINAL
SVR THREAT WILL CONTINUE THROUGH MIDNIGHT AS WATCH 174 STATES.

ANY CHANGES TO FCST WOULD BE POP ADJUSTMENT AS NEEDED AT ISSUANCE
TIME BUT OVERALL EXPECT NO MAJOR CHANGES.

CWF: WILL ADJUST AS NEEDED BASED ON LATEST BUOY OBS BUT FCST
GENERALLY LOOKING GOOD.

.ILM...NONE.

MORGAN

In the hours before

Local storm report, Apr 17, 9:08 PM EDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, NC
908 PM EDT MON APR 17 2000

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

0845 PM    HARTSVILLE                SC   WIND DAMAGE
04/17/00   DARLINGTON                     TREE DOWN

Local storm report, Apr 17, 9:15 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, NC
915 PM EDT MON APR 17 2000

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

0901 PM    1 N EFFINGHAM             SC   .75 INCH HAIL
04/17/00   FLORENCE

DRH

Local storm report, Apr 17, 9:58 PM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, NC
958 PM EDT MON APR 17 2000

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

0940 PM    3 NE  FLORENCE            SC   1.00 INCH HAIL
04/17/00   FLORENCE

DL

Local storm report, Apr 17, 10:01 PM EDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON, NC
1001 PM EDT MON APR 17 2000

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

1000 PM    3 SE HARTSVILLE           SC   1.00 INCH HAIL
04/17/00   DARLINGTON

DL

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 17, 9:01 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Florence	44 min
Apr 17, 10:31 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence	59 min
Apr 17, 10:43 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Marlboro	32 min
Apr 17, 11:16 PM EDT	Severe Thunderstorm Warning	ILM	Williamsburg	59 min
Apr 17, 11:27 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence, Marion	48 min
Apr 17, 11:30 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown	30 min
Apr 17, 11:50 PM EDT	Severe Thunderstorm Warning	ILM	Horry	70 min
Apr 17, 11:50 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown	70 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2000 Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.