Alert archive / South Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 303

March 20, 2003Bladen County, Brunswick County, Columbus County, North Carolina; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2003, 5:48 AM EST for Bladen County, Brunswick County, Columbus County, North Carolina; 11 counties in South Carolina. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Mar 20, 2003, 5:48 AM EST (10:48 UTC)
Expired
Mar 20, 2003, 7:45 AM EST
In force
117 min
Issued by
the Storm Prediction Center

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, Calhoun County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Florence County, SC, Horry County, SC, Lee County, SC, Marion County, SC, Orangeburg County, SC, Sumter County, SC, Williamsburg County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 10.8 hours before the alert went out and 96 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 00:00Z on 2003-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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 00:00Z on 2003-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897117Sfc1 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
7 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
516 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
364 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

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
Mar 20, 2:16 AM ESTMesoscale DiscussionSPCBladen, Columbus, Pender119 min
Mar 20, 10:10 AM ESTTornado WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 10 more5 hr
Mar 20, 10:40 AM ESTMesoscale DiscussionSPCBeaufort, Bladen, Columbus, Craven, Duplin, Greene and 10 more2 hr
Mar 20, 12:52 PM ESTMesoscale DiscussionSPCBeaufort, Bertie, Brunswick, Chowan, Craven, Jones and 7 more113 min
Mar 19, 7:04 PM ESTMesoscale DiscussionSPCAllendale, Beaufort, Colleton, Hampton, Jasper116 min
Mar 19, 7:15 PM ESTTornado WatchSPCBeaufort, Jasper4 hr
Mar 19, 8:58 PM ESTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Calhoun, Chester and 19 more3 hr
Mar 20, 12:20 AM ESTSevere Thunderstorm WatchSPCAbbeville, Aiken, Anderson, Barnwell, Calhoun, Chester and 19 more4 hr
Mar 20, 3:06 AM ESTMesoscale DiscussionSPCAllendale, Bamberg54 min
Mar 20, 3:40 AM ESTTornado WatchSPCAllendale, Bamberg, Berkeley, Colleton, Dorchester, Hampton and 1 more5 hr
Mar 20, 6:12 AM ESTMesoscale DiscussionSPCAllendale, Bamberg, Colleton, Dorchester, Hampton, Jasper2 hr
Mar 20, 8:40 AM ESTTornado WatchSPCBeaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton and 1 more6 hr
Mar 20, 2:35 PM ESTTornado WatchSPCAllendale, Beaufort, Charleston, Colleton, Dorchester, Hampton and 1 more6 hr
Mar 20, 4:21 PM ESTMesoscale DiscussionSPCBeaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton and 1 more114 min
Mar 20, 6:57 PM ESTMesoscale DiscussionSPCAllendale, Bamberg, Barnwell, Beaufort, Charleston, Colleton and 3 more2 hr

Nearby

Mesoscale Discussions in South Carolina, 2003Mesoscale Discussions in North Carolina, 2003Every mesoscale discussion in 2003

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.