Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 590

April 25, 2003Russell County, Alabama; 14 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2003, 7:51 PM CDT for Russell County, Alabama; 14 counties in Georgia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Apr 25, 2003, 7:51 PM CDT (00:51 UTC)
Expired: Apr 25, 2003, 8:45 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Russell County, AL, Chattahoochee County, GA, Crawford County, GA, Dooly County, GA, Houston County, GA, Macon County, GA, Marion County, GA, Muscogee County, GA, Peach County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Webster County, GA

The radar

The Atlanta radar (KFFC), 107 km from the middle of the area, began a volume at 00:53 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.

Severe Thunderstorm Watch 173Apr 25, 9:00 PM CDT

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.9 hours before the alert went out and 107 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: 88 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1574 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
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
Apr 25, 7:22 PM CDT	Mesoscale Discussion	SPC	Coffee, Covington, Dale, Geneva, Henry, Houston	113 min
Apr 25, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Barbour, Butler, Coffee, Conecuh, Covington and 9 more	5 hr
Apr 25, 11:24 PM CDT	Mesoscale Discussion	SPC	Dale, Geneva, Henry, Houston	96 min
Apr 26, 1:12 AM CDT	Mesoscale Discussion	SPC	Houston	63 min
Apr 26, 9:53 AM CDT	Mesoscale Discussion	SPC	Brantley, Camden, Charlton, Clinch, Echols, Ware	2 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.