Alert archive / South Carolina / Mesoscale Discussions in 2016

Mesoscale Discussion 1170

July 6, 201610 counties in Georgia; 4 counties in North Carolina; 13 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2016, 3:44 PM EDT for 10 counties in Georgia; 4 counties in North Carolina; 13 counties in South Carolina. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jul 6, 2016, 3:44 PM EDT (19:44 UTC)
Expired: Jul 6, 2016, 4:45 PM EDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 27 counties

Brantley County, GA, Bryan County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Wayne County, GA, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Robeson County, NC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Marion County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 66 km from the middle of the area, began a volume at 19:46 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 339Jul 6, 4:00 PM EDT

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.7 hours before the alert went out and 37 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: 835 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 6, 1:14 PM EDT	Mesoscale Discussion	SPC	Baldwin, Bibb, Bleckley, Burke, Butts, Chattahoochee and 49 more	61 min
Jul 6, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	Baldwin, Banks, Bibb, Bleckley, Burke, Butts and 61 more	4 hr
Jul 6, 3:01 PM EDT	Mesoscale Discussion	SPC	Baldwin, Bibb, Bleckley, Burke, Butts, Candler and 45 more	59 min
Jul 6, 4:03 PM EDT	Severe Thunderstorm Watch	SPC	Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more	4 hr
Jul 6, 7:51 PM EDT	Mesoscale Discussion	SPC	Fannin, Rabun, Towns, Union, White	54 min
Jul 5, 8:45 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Carteret, Craven, Duplin, Edgecombe and 11 more	2 hr
Jul 6, 5:48 PM EDT	Mesoscale Discussion	SPC	Cherokee, Graham, Swain	57 min

Nearby

Mesoscale Discussions in South Carolina, 2016 Mesoscale Discussions in Georgia, 2016 Mesoscale Discussions in North Carolina, 2016 Every mesoscale discussion in 2016

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.