Alert archive / Georgia / Mesoscale Discussions in 2011

Mesoscale Discussion 1241

June 16, 201130 counties in Georgia; Beaufort County, Charleston County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 12:48 AM EDT for 30 counties in Georgia; Beaufort County, Charleston County, South Carolina. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2011, 12:48 AM EDT (04:48 UTC)
Expired: Jun 16, 2011, 1:45 AM EDT
In force: 57 min
Issued by: the Storm Prediction Center

All 32 counties

Appling County, GA, Bacon County, GA, Ben Hill County, GA, Bleckley County, GA, Bryan County, GA, Chatham County, GA, Coffee County, GA, Dodge County, GA, Dooly County, GA, Evans County, GA, Houston County, GA, Jeff Davis County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Macon County, GA, Marion County, GA, McIntosh County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Schley County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Beaufort County, SC, Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 48 km from the middle of the area, began a volume at 04:49 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 00:00Z, 4.8 hours before the alert went out and 148 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: 459 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1117 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

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 15, 9:27 PM EDT	Severe Thunderstorm Watch	SPC	Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more	6 hr
Jun 15, 10:11 PM EDT	Mesoscale Discussion	SPC	Baldwin, Barrow, Bibb, Bryan, Bulloch, Burke and 47 more	94 min

Nearby

Mesoscale Discussions in Georgia, 2011 Mesoscale Discussions in South Carolina, 2011 Every mesoscale discussion in 2011

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.