Alert archive / North Carolina / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 337

May 30, 200415 counties in North Carolina; 11 counties in South Carolina

The Storm Prediction Center issued this severe thunderstorm watch at May 30, 2004, 4:50 PM EDT for 15 counties in North Carolina; 11 counties in South Carolina. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 30, 2004, 4:50 PM EDT (20:50 UTC)
Expired
May 30, 2004, 10:00 PM EDT
In force
5 hr
Issued by
the Storm Prediction Center
All 26 counties

Bladen County, NC, Brunswick County, NC, Columbus County, NC, Cumberland County, NC, Duplin County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Wayne County, NC, Chesterfield County, SC, Darlington County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Kershaw County, SC, Lee County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 82 km from the middle of the area, began a volume at 20:52 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.

Warnings issued inside it

4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 30, 5:26 PM EDTTornado WarningMHXDuplin49 min
May 30, 6:02 PM EDTTornado WarningILMPender28 min
May 30, 6:41 PM EDTSevere Thunderstorm WarningILMDillon, Marion49 min
May 30, 8:01 PM EDTSevere Thunderstorm WarningILMHorry44 min

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.8 hours before the alert went out and 184 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 290 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
290 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 5:35 PM EDTTornado WatchSPCAlexander, Alleghany, Ashe, Avery, Buncombe, Burke and 19 more5 hr

Nearby

Severe Thunderstorm Watches in North Carolina, 2004Severe Thunderstorm Watches in South Carolina, 2004Every severe thunderstorm watch in 2004

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.