Alert archive / Georgia / Mesoscale Discussions in 2014

Mesoscale Discussion 19

January 11, 201438 counties in Georgia; Allendale County, Hampton County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 11, 2014, 12:17 PM EST for 38 counties in Georgia; Allendale County, Hampton County, South Carolina. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Jan 11, 2014, 12:17 PM EST (17:17 UTC)
Expired
Jan 11, 2014, 1:15 PM EST
In force
58 min
Issued by
the Storm Prediction Center
All 40 counties

Appling County, GA, Bacon County, GA, Baldwin County, GA, Ben Hill County, GA, Bleckley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Hancock County, GA, Houston County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Long County, GA, Montgomery County, GA, Pulaski County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Warren County, GA, Washington County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Allendale County, SC, Hampton County, SC

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 5.3 hours before the alert went out and 223 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, Charleston AFB, SC at 12:00Z on 2014-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 496 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, Charleston AFB, SC at 12:00Z on 2014-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 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
496 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
472 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 11, 8:03 AM ESTMesoscale DiscussionSPCBaker, Baldwin, Bibb, Bleckley, Butts, Calhoun and 53 more27 min
Jan 11, 8:07 AM ESTTornado WatchSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 63 more7 hr
Jan 11, 9:22 AM ESTMesoscale DiscussionSPCHart23 min
Jan 11, 9:30 AM ESTSevere Thunderstorm WatchSPCColumbia, Elbert, Lincoln, McDuffie6 hr
Jan 11, 11:04 AM ESTSevere Thunderstorm WatchSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more6 hr
Jan 11, 11:50 AM ESTTornado WatchSPCBurke, Richmond6 hr
Jan 11, 1:51 PM ESTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more3 hr
Jan 11, 1:53 PM ESTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 23 more97 min
Jan 11, 2:04 PM ESTMesoscale DiscussionSPCRichmond56 min
Jan 11, 3:35 PM ESTMesoscale DiscussionSPCBrantley, Bryan, Camden, Charlton, Chatham, Effingham and 8 more55 min
Jan 11, 11:12 AM ESTMesoscale DiscussionSPCCalhoun, Chesterfield, Darlington, Dillon, Kershaw, Lancaster and 6 more63 min
Jan 11, 2:13 PM ESTTornado WatchSPCGeorgetown, Horry, Williamsburg5 hr
Jan 11, 4:37 PM ESTMesoscale DiscussionSPCBerkeley, Charleston, Georgetown, Horry53 min

Nearby

Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in South Carolina, 2014Every mesoscale discussion in 2014

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.