Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS Atlanta, GA

April 5, 20127 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 5, 2012, 4:51 PM EDT for 7 counties in Georgia. It was in force for 54 min. 5 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
Apr 5, 2012, 4:51 PM EDT (20:51 UTC)
Expired
Apr 5, 2012, 5:45 PM EDT
In force
54 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Emanuel County, GA, Jefferson County, GA, Johnson County, GA, Laurens County, GA, Treutlen County, GA, Washington County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 91 km from the middle of the area, began a volume at 20:51 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

TimeReportWhereRemark
Apr 5, 5:11 PM EDTTSTM WND DMG1 Sw Swainsboro, GAONE TREE BLOWN DOWN ON WEST MORNING STREET.
Apr 5, 5:15 PM EDTTSTM WND DMG4 W Kite, GAFIRE RESCUE REPORTED ONE TREE DOWN ALONG MIDAS BRANTLEY ROAD.
Apr 5, 5:16 PM EDTTSTM WND DMGSwainsboro, GAONE TREE BLOWN DOWN BLOCKING WEST CHURCH STREET.
Apr 5, 5:25 PM EDTTSTM WND DMG1 Nw Summertown, GAONE TREE BLOWN DOWN AND BLOCKING A PORTION OF MCGARRH MILL POND ROAD.
Apr 5, 5:27 PM EDTTSTM WND DMG4 Ese Summertown, GAONE TREE BLOWN DOWN AND BLOCKING A PORTION OF LAWRENCE SHERROD ROAD.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.9 hours before the alert went out and 209 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2012-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2012-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
145 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
871 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
-41 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

492 
WUUS52 KFFC 052051
SVRFFC
GAC107-163-167-175-283-303-319-052145-
/O.NEW.KFFC.SV.W.0076.120405T2051Z-120405T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
451 PM EDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LAURENS COUNTY IN CENTRAL GEORGIA
  EAST CENTRAL WILKINSON COUNTY IN CENTRAL GEORGIA
  NORTHERN EMANUEL COUNTY IN EAST CENTRAL GEORGIA
  JEFFERSON COUNTY IN EAST CENTRAL GEORGIA
  JOHNSON COUNTY IN EAST CENTRAL GEORGIA
  NORTH CENTRAL TREUTLEN COUNTY IN EAST CENTRAL GEORGIA
  SOUTHERN WASHINGTON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 545 PM EDT

* AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  OCONEE TO 7 MILES SOUTHWEST OF WRIGHTSVILLE TO ADRIAN...MOVING EAST
  AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TENNILLE...SANDERSVILLE...HARRISON...SWAINSBORO...RIDDLEVILLE...
  DAVISBORO...BARTOW...SUMMERTOWN...WADLEY...GARFIELD AND LOUISVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3242 8260 3263 8283 3285 8311 3319 8237
      3299 8227 3293 8227 3284 8231 3281 8222
      3282 8218 3271 8209 3266 8208 3263 8204
TIME...MOT...LOC 2052Z 255DEG 34KT 3281 8291 3266 8271
          3251 8256

$$
2 follow-up statements
644 
WWUS52 KFFC 052115
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
515 PM EDT THU APR 5 2012

GAC175-283-319-052125-
/O.CAN.KFFC.SV.W.0076.000000T0000Z-120405T2145Z/
TREUTLEN GA-LAURENS GA-WILKINSON GA-
515 PM EDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WILKINSON...
NORTHEASTERN LAURENS AND NORTH CENTRAL TREUTLEN COUNTIES IS 
CANCELLED...

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
THURSDAY EVENING FOR WEST CENTRAL GEORGIA.

LAT...LON 3251 8245 3270 8267 3290 8281 3319 8237
      3299 8227 3293 8227 3284 8231 3281 8222
      3282 8218 3271 8209 3266 8208 3263 8204
TIME...MOT...LOC 2115Z 255DEG 34KT 3287 8266 3272 8246
          3257 8231

$$

GAC107-163-167-303-052145-
/O.CON.KFFC.SV.W.0076.000000T0000Z-120405T2145Z/
WASHINGTON GA-JOHNSON GA-EMANUEL GA-JEFFERSON GA-
515 PM EDT THU APR 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR JEFFERSON...NORTHERN EMANUEL...EASTERN JOHNSON AND SOUTHEASTERN
WASHINGTON COUNTIES...

AT 511 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60 MPH. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM HARRISON TO KITE TO
SWAINSBORO...MOVING EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DELLWOOD...MODOC...DAVISBORO...BLUNDALE...BARTOW...SUMMERTOWN...
WADLEY...CANOOCHEE...STAPLETONS CROSSROADS...THREE POINTS...
GARFIELD...COLEMANS LAKE...MOXLEY AND LOUISVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
THURSDAY EVENING FOR WEST CENTRAL GEORGIA.

&&

LAT...LON 3251 8245 3270 8267 3290 8281 3319 8237
      3299 8227 3293 8227 3284 8231 3281 8222
      3282 8218 3271 8209 3266 8208 3263 8204
TIME...MOT...LOC 2115Z 255DEG 34KT 3287 8266 3272 8246
          3257 8231

$$
007 
WWUS52 KFFC 052137
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
537 PM EDT THU APR 5 2012

GAC107-163-167-303-052147-
/O.EXP.KFFC.SV.W.0076.000000T0000Z-120405T2145Z/
WASHINGTON GA-JOHNSON GA-EMANUEL GA-JEFFERSON GA-
537 PM EDT THU APR 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR JEFFERSON...NORTHERN
EMANUEL...EASTERN JOHNSON AND SOUTHEASTERN WASHINGTON COUNTIES
EXPIRES AT 545 PM EDT...

AT 535 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60 MPH. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MOXLEY TO THREE 
POINTS TO GARFIELD...MOVING EAST AT 40 MPH AND WILL BE EXITING THE 
COUNTIES SHORTLY.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LOUISVILLE.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
THURSDAY EVENING FOR WEST CENTRAL GEORGIA.

LAT...LON 3251 8245 3270 8267 3290 8281 3319 8237
      3299 8227 3293 8227 3284 8231 3281 8222
      3282 8218 3271 8209 3266 8208 3263 8204
TIME...MOT...LOC 2137Z 255DEG 34KT 3292 8242 3277 8222
          3262 8207

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 4, 8:37 PM EDTSpecial Weather StatementFFCDeKalb, Fulton23 min
Apr 5, 3:04 PM EDTSpecial Weather StatementFFCHouston56 min
Apr 5, 3:08 PM EDTSpecial Weather StatementFFCGilmer37 min
Apr 5, 3:14 PM EDTSpecial Weather StatementFFCBibb46 min
Apr 5, 3:26 PM EDTSpecial Weather StatementFFCBleckley49 min
Apr 5, 3:57 PM EDTSpecial Weather StatementFFCCatoosa, Walker33 min
Apr 5, 4:12 PM EDTSpecial Weather StatementFFCJohnson, Laurens, Washington, Wilkinson63 min
Apr 5, 4:14 PM EDTSpecial Weather StatementFFCStewart61 min
Apr 5, 4:20 PM EDTSpecial Weather StatementFFCToombs25 min
Apr 5, 4:40 PM EDTSpecial Weather StatementFFCSumter, Webster65 min
Apr 5, 5:44 PM EDTSpecial Weather StatementFFCSumter61 min
Apr 5, 6:26 PM EDTSpecial Weather StatementFFCCrisp64 min
Apr 5, 7:03 PM EDTSpecial Weather StatementFFCCatoosa27 min
Apr 5, 7:33 PM EDTSpecial Weather StatementFFCDade42 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012Every 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.