Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

April 18, 2017McDuffie County, Georgia

NWS Columbia, SC issued this special weather statement at Apr 18, 2017, 4:26 PM EDT for McDuffie County, Georgia. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2017, 4:26 PM EDT (20:26 UTC)
Expired: Apr 18, 2017, 5:15 PM EDT
In force: 49 min
Issued by: NWS Columbia, SC

County McDuffie County, GA

The radar

The Robins AFB radar (KJGX), 129 km from the middle of the area, began a volume at 20:27 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.4 hours before the alert went out and 183 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: 96 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 19 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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The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 18, 3:13 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield	2 hr
Apr 18, 5:19 PM EDT	Special Weather Statement	CAE	Aiken	26 min
Apr 18, 5:27 PM EDT	Special Weather Statement	CAE	McCormick	33 min
Apr 18, 5:59 PM EDT	Special Weather Statement	CAE	Aiken	46 min
Apr 18, 6:39 PM EDT	Special Weather Statement	CAE	Clarendon	51 min
Apr 18, 3:48 PM EDT	Special Weather Statement	CAE	McDuffie	27 min
Apr 18, 4:27 PM EDT	Special Weather Statement	CAE	Richmond	48 min

Nearby

Special Weather Statements in Georgia, 2017 Every special weather statement in 2017

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.