Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 832

May 7, 200312 counties in Alabama; 46 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 7, 2003, 7:32 PM CDT for 12 counties in Alabama; 46 counties in Georgia. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 7, 2003, 7:32 PM CDT (00:32 UTC)
Expired: May 7, 2003, 8:30 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 58 counties

Barbour County, AL, Bullock County, AL, Chambers County, AL, Coosa County, AL, Crenshaw County, AL, Elmore County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL, Tallapoosa County, AL, Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Chattahoochee County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Fayette County, GA, Hancock County, GA, Harris County, GA, Henry County, GA, Houston County, GA, Jasper County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Newton County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilkinson County, GA

The radar

The Atlanta radar (KFFC), 57 km from the middle of the area, began a volume at 00:31 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.

The watches that followed

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

Tornado Watch 291May 7, 7:50 PM CDT

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.5 hours before the alert went out and 188 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: 2242 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 8.2

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
May 7, 7:50 PM CDT	Tornado Watch	SPC	Barbour, Chambers, Lee, Russell	5 hr
May 7, 10:09 PM CDT	Mesoscale Discussion	SPC	Barbour, Chambers, Lee, Russell	96 min
May 8, 12:04 AM CDT	Mesoscale Discussion	SPC	Barbour, Lee, Russell	56 min
May 8, 1:18 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Chilton, Elmore and 7 more	3 hr
May 8, 2:56 AM CDT	Mesoscale Discussion	SPC	Chambers, Clay, Randolph, Talladega	3 hr

Nearby

Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in Alabama, 2003 Every mesoscale discussion in 2003

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.