Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 2134

October 23, 200719 counties in Alabama; 26 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Oct 23, 2007, 4:24 AM CDT for 19 counties in Alabama; 26 counties in Georgia. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Oct 23, 2007, 4:24 AM CDT (09:24 UTC)
Expired
Oct 23, 2007, 6:00 AM CDT
In force
96 min
Issued by
the Storm Prediction Center
All 45 counties

Barbour County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coffee County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Elmore County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Tallapoosa County, AL, Bartow County, GA, Carroll County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Douglas County, GA, Fayette County, GA, Floyd County, GA, Fulton County, GA, Gordon County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Meriwether County, GA, Muscogee County, GA, Paulding County, GA, Pike County, GA, Polk County, GA, Quitman County, GA, Spalding County, GA, Talbot County, GA, Troup County, GA, Upson County, GA

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 9.4 hours before the alert went out and 124 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 2007-10-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 464 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 2007-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 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
464 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
201 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.6

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
Oct 22, 7:29 PM CDTMesoscale DiscussionSPCMobile91 min
Oct 22, 11:14 PM CDTTornado WatchSPCAutauga, Bibb, Chilton, Coosa, Dallas, Elmore and 2 more89 min
Oct 23, 12:43 AM CDTTornado WatchSPCAutauga, Barbour, Blount, Bullock, Butler, Calhoun and 23 more6 hr
Oct 23, 2:15 AM CDTMesoscale DiscussionSPCBarbour, Chambers, Lee, Russell90 min
Oct 23, 1:45 PM CDTMesoscale DiscussionSPCLee, Russell60 min
Oct 23, 2:36 AM CDTTornado WatchSPCBartow, Carroll, Coweta, Douglas, Floyd, Haralson and 6 more4 hr

Nearby

Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in Alabama, 2007Every mesoscale discussion in 2007

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.