Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 240, NWS Columbia, SC

September 7, 2012Burke County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Sep 7, 2012, 7:49 PM EDT for Burke County, Georgia. It was in force for 41 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: Sep 7, 2012, 7:49 PM EDT (23:49 UTC)
Expired: Sep 7, 2012, 8:30 PM EDT
In force: 41 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

County Burke County, GA

The radar

The Charleston,SC radar (KCLX), 110 km from the middle of the area, began a volume at 23:50 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, 11.8 hours before the alert went out and 205 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: 1663 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: -73 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.

402 
WUUS52 KCAE 072349
SVRCAE
GAC033-080030-
/O.NEW.KCAE.SV.W.0240.120907T2349Z-120908T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
749 PM EDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BURKE COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 830 PM EDT

* AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  NORTHEAST OF MIDVILLE...OR 14 MILES NORTHWEST OF MILLEN...AND
  MOVING SOUTHWEST AT 5 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE MIDVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

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 3282 8226 3282 8230 3283 8232 3293 8228
      3298 8228 3306 8210 3293 8195 3291 8209
      3288 8212 3282 8214 3281 8216 3280 8222
TIME...MOT...LOC 2348Z 059DEG 3KT 3292 8214

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 7:35 PM EDT	Special Weather Statement	CAE	Burke	40 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.