Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 227, NWS Columbia, SC

August 9, 2012Aiken County, Edgefield County, McCormick County, South Carolina; 4 counties in Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Aug 9, 2012, 7:15 PM EDT for Aiken County, Edgefield County, McCormick County, South Carolina; 4 counties in Georgia. It was in force for 45 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 9, 2012, 7:15 PM EDT (23:15 UTC)
Expired: Aug 9, 2012, 8:00 PM EDT
In force: 45 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Burke County, GA, Columbia County, GA, Lincoln County, GA, Richmond County, GA, Aiken County, SC, Edgefield County, SC, McCormick County, SC

The radar

The Columbia radar (KCAE), 83 km from the middle of the area, began a volume at 23:15 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.

What was reported inside it

Time	Report	Where	Remark
Aug 9, 7:17 PM EDT	TSTM WND GST 49	2 Wnw Augusta, GA	43 KNOT...OR 49 MPH...WIND GUST MEASURED AT AUGUSTA DANIEL FIELD.
Aug 9, 7:26 PM EDT	TSTM WND DMG	2 Nnw Augusta, GA	TREE DOWN ON MILLEDGE RD AT BATTLE ROW
Aug 9, 7:26 PM EDT	TSTM WND DMG	4 Nnw Augusta, GA	LARGE TREE LIMBS DOWN ON WASHINGTON RD AT BERTRAM RD
Aug 9, 7:34 PM EDT	TSTM WND DMG	3 Ne Martinez, GA	COLUMBIA COUNTY SHERIFF REPORTED TREE DOWN ON STEVENS CREEK ROAD AND OLD STEVENS CREEK ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.3 hours before the alert went out and 195 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: 957 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 723 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

300 
WUUS52 KCAE 092315
SVRCAE
GAC033-073-181-245-SCC003-037-065-100000-
/O.NEW.KCAE.SV.W.0227.120809T2315Z-120810T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
715 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RICHMOND COUNTY IN EAST CENTRAL GEORGIA
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL GEORGIA
  NORTHERN BURKE COUNTY IN EAST CENTRAL GEORGIA
  COLUMBIA COUNTY IN EAST CENTRAL GEORGIA
  EDGEFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN MCCORMICK COUNTY IN CENTRAL SOUTH CAROLINA
  WESTERN AIKEN COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 800 PM EDT

* AT 711 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 12 MILES NORTHWEST OF EVANS TO 13 MILES SOUTHEAST OF
  HEPHZIBAH...OR ALONG A LINE EXTENDING FROM 12 MILES NORTHWEST OF
  EVANS TO WAYNESBORO...AND MOVING NORTHEAST AT 30 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE MARTINEZ...
  HEPHZIBAH...GROVETOWN...FORT GORDON...EVANS...AUGUSTA...NORTH
  AUGUSTA...NEW ELLENTON...JOHNSTON...JACKSON...EDGEFIELD...
  CLEARWATER...BELVEDERE...AIKEN AND GLOVERVILLE

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE...TOLL FREE 1 877 6 3
3...6 7 7 2.

LAT...LON 3371 8243 3397 8201 3398 8190 3396 8189
      3390 8187 3386 8184 3387 8182 3341 8148
      3320 8176 3318 8177 3315 8176 3299 8193
TIME...MOT...LOC 2315Z 236DEG 24KT 3367 8225 3313 8198

$$

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 9:01 PM EDT	Areal Flood Advisory	CAE	Chesterfield	119 min
Aug 8, 11:20 PM EDT	Special Weather Statement	CAE	Calhoun, Clarendon, Orangeburg, Sumter	55 min
Aug 9, 6:29 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	61 min
Aug 9, 6:41 PM EDT	Severe Thunderstorm Warning	CAE	Newberry, Saluda	64 min
Aug 9, 7:00 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	45 min
Aug 9, 7:31 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Bamberg, Barnwell, Orangeburg	59 min
Aug 9, 7:57 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell, Calhoun, Edgefield, Lexington, Newberry and 2 more	48 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012 Severe Thunderstorm Warnings in South Carolina, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.