Alert archive / Georgia / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 68

March 27, 201123 counties in Alabama; 93 counties in Georgia; 8 counties in South Carolina

The Storm Prediction Center issued this severe thunderstorm watch at Mar 27, 2011, 8:55 AM CDT for 23 counties in Alabama; 93 counties in Georgia; 8 counties in South Carolina. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Mar 27, 2011, 8:55 AM CDT (13:55 UTC)
Expired
Mar 27, 2011, 4:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 124 counties

Autauga County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Coffee County, AL, Coosa County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Chattahoochee County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, McIntosh County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pierce County, GA, Pike County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Screven County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Ware County, GA, Washington County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA, Allendale County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC

The radar

The Robins AFB radar (KJGX), 97 km from the middle of the area, began a volume at 13:55 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 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
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 27, 9:30 AM CDTSevere Thunderstorm WarningFFCMeriwether, Talbot, Upson30 min
Mar 27, 9:33 AM CDTSevere Thunderstorm WarningFFCBibb, Crawford, Monroe42 min
Mar 27, 9:57 AM CDTSevere Thunderstorm WarningFFCBibb, Crawford, Monroe, Upson48 min
Mar 27, 10:02 AM CDTSevere Thunderstorm WarningBMXAutauga, Chilton, Coosa, Elmore28 min
Mar 27, 11:48 AM CDTSevere Thunderstorm WarningFFCJohnson, Laurens42 min
Mar 27, 11:57 AM CDTSevere Thunderstorm WarningCHSJasper45 min
Mar 27, 12:12 PM CDTSevere Thunderstorm WarningBMXRussell48 min
Mar 27, 12:14 PM CDTSevere Thunderstorm WarningFFCEmanuel, Treutlen46 min
Mar 27, 12:29 PM CDTSevere Thunderstorm WarningCHSBeaufort, Colleton, Jasper45 min
Mar 27, 12:38 PM CDTSevere Thunderstorm WarningFFCChattahoochee, Stewart37 min
Mar 27, 12:40 PM CDTSevere Thunderstorm WarningTAEDale, Henry50 min
Mar 27, 12:41 PM CDTSevere Thunderstorm WarningCHSBulloch, Candler64 min
Mar 27, 12:45 PM CDTSevere Thunderstorm WarningTAEGrady, Thomas45 min
Mar 27, 12:48 PM CDTSevere Thunderstorm WarningCHSEffingham26 min
Mar 27, 12:51 PM CDTSevere Thunderstorm WarningMOBCrenshaw24 min
Mar 27, 12:55 PM CDTSevere Thunderstorm WarningJAXBacon, Pierce, Ware20 min
Mar 27, 12:57 PM CDTSevere Thunderstorm WarningCHSBeaufort63 min
Mar 27, 1:01 PM CDTSevere Thunderstorm WarningFFCEmanuel, Laurens, Montgomery, Toombs, Treutlen, Wheeler44 min
Mar 27, 1:05 PM CDTTornado WarningJAXPierce40 min
Mar 27, 1:13 PM CDTSevere Thunderstorm WarningCHSBulloch, Candler, Effingham, Screven62 min
Mar 27, 1:13 PM CDTSevere Thunderstorm WarningTAEBerrien, Cook, Lanier47 min
Mar 27, 1:22 PM CDTSevere Thunderstorm WarningFFCMarion, Schley, Sumter, Webster53 min
Mar 27, 1:29 PM CDTSevere Thunderstorm WarningBMXBarbour31 min
Mar 27, 1:30 PM CDTSevere Thunderstorm WarningTAEClay, Quitman, Randolph45 min
Mar 27, 1:31 PM CDTSevere Thunderstorm WarningTAEHenry44 min
Mar 27, 1:32 PM CDTSevere Thunderstorm WarningCHSBulloch, Candler, Evans, Tattnall58 min
Mar 27, 1:32 PM CDTSevere Thunderstorm WarningFFCDooly, Pulaski43 min
Mar 27, 1:33 PM CDTSevere Thunderstorm WarningTAEDale, Henry, Houston42 min
Mar 27, 1:38 PM CDTSevere Thunderstorm WarningJAXBrantley, Wayne39 min
Mar 27, 1:41 PM CDTSevere Thunderstorm WarningCHSBulloch, Chatham, Effingham64 min
Mar 27, 1:52 PM CDTSevere Thunderstorm WarningFFCBleckley, Dodge53 min
Mar 27, 1:58 PM CDTSevere Thunderstorm WarningCHSChatham62 min
Mar 27, 2:01 PM CDTSevere Thunderstorm WarningFFCLaurens, Montgomery, Treutlen, Wheeler59 min
Mar 27, 2:05 PM CDTSevere Thunderstorm WarningCHSBryan, Bulloch, Effingham, Evans55 min
Mar 27, 2:11 PM CDTSevere Thunderstorm WarningFFCCrisp, Dooly49 min
Mar 27, 2:12 PM CDTSevere Thunderstorm WarningCHSBryan, Bulloch, Chatham, Effingham, Evans, Liberty63 min
Mar 27, 2:13 PM CDTSevere Thunderstorm WarningTAEHenry, Houston47 min
Mar 27, 2:18 PM CDTSevere Thunderstorm WarningTAEBrooks, Lanier, Lowndes42 min
Mar 27, 2:26 PM CDTSevere Thunderstorm WarningCHSBeaufort33 min
Mar 27, 2:34 PM CDTSevere Thunderstorm WarningFFCDodge, Wilcox56 min
Mar 27, 2:38 PM CDTSevere Thunderstorm WarningTAECoffee22 min
Mar 27, 2:45 PM CDTSevere Thunderstorm WarningCHSBryan, Bulloch, Evans, Liberty, Long, Tattnall60 min
Mar 27, 2:51 PM CDTSevere Thunderstorm WarningFFCDodge, Montgomery, Telfair, Toombs, Wheeler54 min
Mar 27, 2:56 PM CDTSevere Thunderstorm WarningTAEBaker, Early, Miller, Mitchell50 min
Mar 27, 2:58 PM CDTSevere Thunderstorm WarningTAELanier, Lowndes32 min
Mar 27, 2:59 PM CDTSevere Thunderstorm WarningTAECoffee, Dale, Geneva, Houston46 min
Mar 27, 3:01 PM CDTSevere Thunderstorm WarningJAXClinch, Echols, Ware13 min
Mar 27, 3:02 PM CDTSevere Thunderstorm WarningCHSChatham58 min
Mar 27, 3:03 PM CDTTornado WarningTAEBaker, Miller, Mitchell27 min
Mar 27, 3:05 PM CDTSevere Thunderstorm WarningTAEBerrien, Brooks, Cook, Lowndes40 min
Mar 27, 3:11 PM CDTSevere Thunderstorm WarningCHSBryan, Chatham, Effingham, Evans, Liberty64 min
Mar 27, 3:20 PM CDTSevere Thunderstorm WarningCHSBulloch, Candler, Evans, Tattnall34 min
Mar 27, 3:26 PM CDTSevere Thunderstorm WarningFFCDodge, Telfair, Wilcox25 min
Mar 27, 3:29 PM CDTSevere Thunderstorm WarningJAXAppling, Jeff Davis33 min
Mar 27, 3:35 PM CDTSevere Thunderstorm WarningTAEDale, Geneva, Henry, Houston40 min
Mar 27, 3:36 PM CDTSevere Thunderstorm WarningTAECoffee, Dale, Geneva, Houston39 min
Mar 27, 3:37 PM CDTSevere Thunderstorm WarningCHSBryan, Bulloch, Evans, Liberty, Long, Tattnall53 min
Mar 27, 3:53 PM CDTSevere Thunderstorm WarningCHSChatham48 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, 1.9 hours before the alert went out and 220 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 2011-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 231 square meters per square second.1939587897Sfc1 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
199 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
999 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
231 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 26, 7:47 PM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more7 hr
Mar 26, 11:21 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more54 min
Mar 27, 7:33 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Chambers, Chilton, Clay, Coosa and 16 more117 min
Mar 27, 10:51 AM CDTMesoscale DiscussionSPCBarbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more84 min
Mar 27, 2:49 PM CDTMesoscale DiscussionSPCBaldwin, Coffee, Covington, Dale, Geneva, Henry and 1 more56 min
Mar 27, 3:27 PM CDTSevere Thunderstorm WatchSPCCoffee, Covington, Dale, Escambia, Geneva, Henry and 1 more5 hr
Mar 27, 6:24 PM CDTMesoscale DiscussionSPCBaldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more2 hr
Mar 26, 7:55 PM CDTMesoscale DiscussionSPCBanks, Barrow, Bartow, Catoosa, Chattooga, Cherokee and 36 more95 min
Mar 26, 8:19 PM CDTSevere Thunderstorm WatchSPCBanks, Barrow, Bartow, Burke, Catoosa, Chattooga and 39 more8 hr
Mar 26, 10:10 PM CDTMesoscale DiscussionSPCBryan, Bulloch, Candler, Chatham, Effingham, Evans and 3 more65 min
Mar 26, 11:43 PM CDTMesoscale DiscussionSPCBanks, Barrow, Bartow, Burke, Catoosa, Chattooga and 38 more62 min
Mar 27, 2:03 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Bibb, Bleckley and 40 more57 min
Mar 27, 2:25 AM CDTTornado WatchSPCAppling, Baldwin, Bibb, Bleckley, Bryan, Bulloch and 46 more3 hr

Nearby

Severe Thunderstorm Watches in Georgia, 2011Severe Thunderstorm Watches in Alabama, 2011Severe Thunderstorm Watches in South Carolina, 2011Every severe thunderstorm watch in 2011

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.