Alert archive / Georgia / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 346
The Storm Prediction Center issued this severe thunderstorm watch at Jun 3, 2012, 6:00 PM EDT for 20 counties in Georgia. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jun 3, 2012, 6:00 PM EDT (22:00 UTC)
- Expired
- Jun 3, 2012, 7:55 PM EDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
Counties Chattahoochee County, GA, Coweta County, GA, Crawford County, GA, Harris County, GA, Heard County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Schley County, GA, Stewart County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Webster County, GA
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.0 hours before the alert went out and 94 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.
- Mixed-layer CAPE
- 12 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1374 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
597
WWUS20 KWNS 032158
SEL6
SPC WW 032158
GAZ000-040300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 346
NWS STORM PREDICTION CENTER NORMAN OK
500 PM EST SUN JUN 3 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WEST CENTRAL GEORGIA
EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
1000 PM EST.
HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF
LA GRANGE GEORGIA TO 40 MILES SOUTHEAST OF COLUMBUS GEORGIA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 344...WW 345...
DISCUSSION...SMALL MCS WITH LOCALLY DMGG WIND NOW NEAR BHM EXPECTED
TO CONTINUE MAINLY ESEWD THROUGH LATER THIS EVE. A SLIGHT TURN TO
THE RIGHT /SEWD/ MAY OCCUR WITH TIME IN RESPONSE TO PREFERRED STORM
PROPAGATION ON SRN FLANK OF SYSTEM. THE MCS APPEARS TO BE SUPPORTED
BY REMNANT MCV FROM LAST NIGHT'S MCS OVER THE SRN PLNS. COUPLED
WITH WLY LOW TO MID LVL INFLOW OF FAIRLY STEEP MID LVL LAPSE RATES
AND INCREASING MOISTURE...SYSTEM MAY CONTINUE TO POSE A SPORADIC
THREAT FOR DMGG WIND/MARGINALLY SVR HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 29035.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 2:11 PM EDT | Mesoscale Discussion | SPC | Blount, Calhoun, Cherokee, Clay, Colbert, Coosa and 17 more | 64 min |
| Jun 3, 2:26 PM EDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Chambers, Chilton, Clay and 27 more | 5 hr |
| Jun 3, 4:47 PM EDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Clay, Cleburne, Cullman and 10 more | 88 min |
| Jun 3, 5:39 PM EDT | Mesoscale Discussion | SPC | Autauga, Bibb, Bullock, Chambers, Chilton, Coosa and 11 more | 66 min |
| Jun 3, 7:51 PM EDT | Mesoscale Discussion | SPC | Chattahoochee, Crawford, Harris, Heard, Lamar, Macon and 14 more | 54 min |
Nearby
Severe Thunderstorm Watches in Georgia, 2012Every severe thunderstorm watch 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.