Alert archive / Georgia / Mesoscale Discussions in 2004

Mesoscale Discussion 1397

June 23, 200416 counties in Georgia; Beaufort County, Jasper County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2004, 5:12 PM EDT for 16 counties in Georgia; Beaufort County, Jasper County, South Carolina. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 23, 2004, 5:12 PM EDT (21:12 UTC)
Expired: Jun 23, 2004, 6:45 PM EDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Appling County, GA, Bacon County, GA, Bryan County, GA, Bulloch County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Toombs County, GA, Wayne County, GA, Beaufort County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 119 km from the middle of the area, began a volume at 21:15 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.2 hours before the alert went out and 207 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: 174 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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.

Issued	Product	Office	Counties	Lasted
Jun 23, 4:03 PM EDT	Mesoscale Discussion	SPC	Marlboro	87 min
Jun 23, 4:25 PM EDT	Severe Thunderstorm Watch	SPC	Marlboro	5 hr
Jun 23, 6:30 PM EDT	Mesoscale Discussion	SPC	Marlboro	90 min

Nearby

Mesoscale Discussions in Georgia, 2004 Mesoscale Discussions in South Carolina, 2004 Every mesoscale discussion 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.