Alert archive / Georgia / Mesoscale Discussions in 2013

Mesoscale Discussion 312

March 23, 201317 counties in Alabama; 25 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2013, 10:28 PM CDT for 17 counties in Alabama; 25 counties in Georgia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Mar 23, 2013, 10:28 PM CDT (03:28 UTC)
Expired
Mar 24, 2013, 12:00 AM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 42 counties

Autauga County, AL, Bibb County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coosa County, AL, Elmore County, AL, Hale County, AL, Lee County, AL, Macon County, AL, Perry County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Chattahoochee County, GA, Crawford County, GA, Crisp County, GA, Dooly County, GA, Harris County, GA, Heard County, GA, Houston County, GA, Lee County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Troup County, GA, Turner County, GA, Upson County, GA, Webster County, GA, Wilcox County, GA

The watches that followed

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 3.5 hours before the alert went out and 130 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, Birmingham, AL at 00:00Z on 2013-03-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Birmingham, AL at 00:00Z on 2013-03-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939587897117Sfc1 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
528 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Mar 23, 9:29 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Calhoun, Chambers and 30 more61 min
Mar 24, 3:12 AM CDTMesoscale DiscussionSPCAutauga, Bullock, Butler, Chilton, Choctaw, Clarke and 15 more93 min
Mar 24, 3:12 AM CDTMesoscale DiscussionSPCHouston93 min
Mar 24, 3:42 AM CDTTornado WatchSPCHenry, Houston6 hr
Mar 24, 5:55 AM CDTMesoscale DiscussionSPCRussell65 min
Mar 23, 11:48 PM CDTSevere Thunderstorm WatchSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Carroll and 64 more7 hr
Mar 24, 3:46 AM CDTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Bleckley, Butts, Carroll and 65 more89 min
Mar 24, 6:54 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 31 more66 min
Mar 24, 9:09 AM CDTMesoscale DiscussionSPCBrantley, Bryan, Camden, Charlton, Glynn, Liberty and 3 more66 min

Nearby

Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in Alabama, 2013Every mesoscale discussion in 2013

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.