Alert archive / Georgia / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 351

June 4, 201245 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 4, 2012, 1:09 PM EDT for 45 counties in Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jun 4, 2012, 1:09 PM EDT (17:09 UTC)
Expired
Jun 4, 2012, 3:56 PM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 45 counties

Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Dodge County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Johnson County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Tattnall County, GA, Telfair County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 4, 1:19 PM EDTSevere Thunderstorm WarningTAEBen Hill, Irwin26 min
Jun 4, 1:23 PM EDTTornado WarningCHSBryan, Liberty, Long37 min
Jun 4, 1:42 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Effingham, Liberty48 min
Jun 4, 1:44 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty, Long, McIntosh46 min
Jun 4, 1:50 PM EDTSevere Thunderstorm WarningCHSLiberty, Long, Tattnall40 min
Jun 4, 2:18 PM EDTSevere Thunderstorm WarningJAXAppling, Bacon, Brantley, Pierce, Wayne42 min
Jun 4, 2:21 PM EDTSevere Thunderstorm WarningJAXWayne39 min
Jun 4, 2:22 PM EDTSevere Thunderstorm WarningCHSBryan, Liberty, Long, McIntosh53 min
Jun 4, 2:30 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty, McIntosh60 min
Jun 4, 2:49 PM EDTSevere Thunderstorm WarningJAXGlynn, Wayne41 min
Jun 4, 3:21 PM EDTSevere Thunderstorm WarningJAXGlynn11 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 5.2 hours before the alert went out and 159 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, Jacksonville, FL at 12:00Z on 2012-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2012-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1842 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 12:13 AM EDTMesoscale DiscussionSPCChattooga, Dade, Floyd, Gordon, Walker, Whitfield62 min
Jun 4, 6:33 AM EDTMesoscale DiscussionSPCBaker, Baldwin, Ben Hill, Berrien, Bibb, Bleckley and 56 more87 min
Jun 4, 9:43 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 73 more2 hr

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.