Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 1060

May 18, 200312 counties in Georgia; Allendale County, Hampton County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at May 18, 2003, 5:57 PM EDT for 12 counties in Georgia; Allendale County, Hampton County, South Carolina. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: May 18, 2003, 5:57 PM EDT (21:57 UTC)
Expired: May 18, 2003, 7:00 PM EDT
In force: 63 min
Issued by: the Storm Prediction Center

Counties Burke County, GA, Candler County, GA, Columbia County, GA, Emanuel County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Montgomery County, GA, Richmond County, GA, Screven County, GA, Treutlen County, GA, Allendale County, SC, Hampton County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.0 hours before the alert went out and 212 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: 180 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

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 18, 11:18 AM EDT	Mesoscale Discussion	SPC	Baker, Bibb, Butts, Calhoun, Carroll, Chattahoochee and 45 more	87 min
May 18, 12:00 PM EDT	Tornado Watch	SPC	Baker, Baldwin, Bibb, Bleckley, Butts, Calhoun and 58 more	5 hr
May 18, 1:10 PM EDT	Tornado Watch	SPC	Bryan, Bulloch, Burke, Candler, Chatham, Effingham and 17 more	6 hr
May 18, 1:16 PM EDT	Mesoscale Discussion	SPC	Atkinson, Bacon, Ben Hill, Berrien, Brantley, Brooks and 9 more	119 min
May 18, 1:40 PM EDT	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 22 more	6 hr
May 18, 2:10 PM EDT	Mesoscale Discussion	SPC	Baker, Baldwin, Bibb, Bleckley, Butts, Calhoun and 50 more	95 min
May 18, 6:22 PM EDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 22 more	83 min

Nearby

Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in South Carolina, 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.