Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 560

April 19, 200670 counties in Georgia; 8 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2006, 12:56 PM EDT for 70 counties in Georgia; 8 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 19, 2006, 12:56 PM EDT (16:56 UTC)
Expired
Apr 19, 2006, 3:00 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 78 counties

Appling County, GA, Atkinson County, GA, Bacon County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Columbia County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Glynn County, GA, Hancock County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, McDuffie County, GA, McIntosh County, GA, Monroe County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Putnam County, GA, Richmond County, GA, Screven County, GA, Taliaferro County, GA, Tattnall County, GA, Telfair County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Twiggs County, GA, Ware County, GA, Warren County, GA, Washington County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC

The radar

The Robins AFB radar (KJGX), 59 km from the middle of the area, began a volume at 16:55 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.9 hours before the alert went out and 184 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, Peachtre/Fal Fld, GA at 12:00Z on 2006-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 373 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, Peachtre/Fal Fld, GA at 12:00Z on 2006-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 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
373 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Apr 19, 8:58 AM EDTMesoscale DiscussionSPCBartow, Catoosa, Cherokee, Cobb, Dawson, Fannin and 7 more2 hr
Apr 19, 10:59 AM EDTSevere Thunderstorm WatchSPCBarrow, Bartow, Butts, Carroll, Chattooga, Cherokee and 35 more6 hr
Apr 19, 2:39 PM EDTMesoscale DiscussionSPCBaldwin, Barrow, Bartow, Butts, Carroll, Chattooga and 35 more96 min
Apr 19, 3:31 PM EDTMesoscale DiscussionSPCBibb, Carroll, Chattahoochee, Chattooga, Clayton, Coweta and 32 more89 min
Apr 19, 3:54 PM EDTTornado WatchSPCCarroll, Chattahoochee, Coweta, Haralson, Harris, Heard and 13 more6 hr
Apr 19, 4:40 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 36 more2 hr
Apr 19, 6:34 PM EDTSevere Thunderstorm WatchSPCAtkinson, Baker, Ben Hill, Berrien, Brooks, Calhoun and 24 more4 hr

Nearby

Mesoscale Discussions in Georgia, 2006Mesoscale Discussions in South Carolina, 2006Every mesoscale discussion in 2006

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.