Alert archive / Georgia / Mesoscale Discussions in 2007

Mesoscale Discussion 2133

October 23, 20074 counties in Alabama; 12 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Oct 23, 2007, 2:15 AM CDT for 4 counties in Alabama; 12 counties in Georgia. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Oct 23, 2007, 2:15 AM CDT (07:15 UTC)
Expired: Oct 23, 2007, 3:45 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Barbour County, AL, Chambers County, AL, Lee County, AL, Russell County, AL, Carroll County, GA, Chattahoochee County, GA, Coweta County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Meriwether County, GA, Muscogee County, GA, Polk County, GA, Quitman County, GA, Stewart County, GA, Troup County, GA

The watches that followed

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

Tornado Watch 732Oct 23, 2:30 AM CDT

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.3 hours before the alert went out and 98 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 245 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

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.

Issued	Product	Office	Counties	Lasted
Oct 22, 7:29 PM CDT	Mesoscale Discussion	SPC	Mobile	91 min
Oct 22, 11:14 PM CDT	Tornado Watch	SPC	Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 2 more	89 min
Oct 23, 12:43 AM CDT	Tornado Watch	SPC	Autauga, Barbour, Blount, Bullock, Butler, Calhoun and 23 more	6 hr
Oct 23, 4:24 AM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 13 more	96 min
Oct 23, 1:45 PM CDT	Mesoscale Discussion	SPC	Lee, Russell	60 min
Oct 23, 2:36 AM CDT	Tornado Watch	SPC	Bartow, Carroll, Coweta, Douglas, Floyd, Haralson and 6 more	4 hr

Nearby

Mesoscale Discussions in Georgia, 2007 Mesoscale Discussions in Alabama, 2007 Every 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.