Alert archive / Georgia / Mesoscale Discussions in 2003

Mesoscale Discussion 309

March 20, 200316 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2003, 1:33 PM EST for 16 counties in Georgia. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Mar 20, 2003, 1:33 PM EST (18:33 UTC)
Expired
Mar 20, 2003, 3:30 PM EST
In force
117 min
Issued by
the Storm Prediction Center

Counties Appling County, GA, Atkinson County, GA, Bacon County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Cook County, GA, Jeff Davis County, GA, Lanier County, GA, Lowndes County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA

The watches that followed

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

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.6 hours before the alert went out and 139 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, Jacksonville, FL at 12:00Z on 2003-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1354 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jacksonville, FL at 12:00Z on 2003-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 242 square meters per square second.19395878Sfc1 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
1354 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
242 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
1.9
Supercell composite
9.3

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
Mar 19, 7:04 PM ESTMesoscale DiscussionSPCAppling, Bacon, Brantley, Bryan, Bulloch, Camden and 15 more116 min
Mar 19, 7:15 PM ESTTornado WatchSPCAppling, Bacon, Bryan, Bulloch, Candler, Chatham and 11 more4 hr
Mar 19, 8:58 PM ESTMesoscale DiscussionSPCBurke, Columbia, Glascock, Jefferson, Jenkins, Lincoln and 6 more3 hr
Mar 19, 9:41 PM ESTMesoscale DiscussionSPCClay, Early3 hr
Mar 19, 10:25 PM ESTTornado WatchSPCBaker, Baldwin, Bibb, Calhoun, Chattahoochee, Clay and 30 more6 hr
Mar 19, 11:16 PM ESTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Butts, Carroll and 50 more2 hr
Mar 20, 12:20 AM ESTSevere Thunderstorm WatchSPCBanks, Barrow, Butts, Clarke, Clayton, Cobb and 38 more4 hr
Mar 20, 12:52 AM ESTMesoscale DiscussionSPCAtkinson, Bacon, Baker, Ben Hill, Berrien, Bibb and 52 more2 hr
Mar 20, 3:06 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 46 more54 min
Mar 20, 3:40 AM ESTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 50 more5 hr
Mar 20, 6:12 AM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brooks and 40 more2 hr
Mar 20, 8:40 AM ESTTornado WatchSPCAppling, Atkinson, Bacon, Berrien, Brantley, Brooks and 20 more6 hr
Mar 20, 11:09 AM ESTMesoscale DiscussionSPCAtkinson, Berrien, Brantley, Brooks, Clinch, Colquitt and 6 more2 hr
Mar 20, 2:35 PM ESTTornado WatchSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 34 more6 hr
Mar 20, 4:21 PM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 36 more114 min
Mar 20, 6:57 PM ESTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 37 more2 hr

Nearby

Mesoscale Discussions in Georgia, 2003Every 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.