Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 476

April 8, 200613 counties in Florida; 19 counties in Georgia; 5 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2006, 4:22 PM EDT for 13 counties in Florida; 19 counties in Georgia; 5 counties in South Carolina. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2006, 4:22 PM EDT (20:22 UTC)
Expired
Apr 8, 2006, 6:15 PM EDT
In force
113 min
Issued by
the Storm Prediction Center
All 37 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Nassau County, FL, Saint Johns County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Echols County, GA, Effingham County, GA, Glynn County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Georgetown County, SC, Jasper County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.4 hours before the alert went out and 140 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, Charleston AFB, SC at 12:00Z on 2006-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 516 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, Charleston AFB, SC at 12:00Z on 2006-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
516 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

IssuedProductOfficeCountiesLasted
Apr 8, 9:37 AM EDTMesoscale DiscussionSPCCalhoun, Escambia, Gadsden, Holmes, Jackson, Jefferson and 6 more113 min
Apr 8, 10:00 AM EDTTornado WatchSPCBay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 13 more7 hr
Apr 8, 12:00 PM EDTMesoscale DiscussionSPCBaker, Columbia, Duval, Nassau, Union2 hr
Apr 8, 1:30 PM EDTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 7 more8 hr
Apr 8, 3:00 PM EDTMesoscale DiscussionSPCBay, Calhoun, Gadsden, Gulf, Holmes, Jackson and 8 more2 hr
Apr 8, 4:45 PM EDTTornado WatchSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 9 more4 hr
Apr 8, 6:59 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 16 more91 min
Apr 7, 9:20 PM EDTTornado WatchSPCBanks, Bartow, Carroll, Catoosa, Chattooga, Cherokee and 25 more10 hr
Apr 7, 11:16 PM EDTMesoscale DiscussionSPCDade89 min
Apr 8, 3:10 AM EDTTornado WatchSPCBaldwin, Barrow, Bibb, Butts, Chattahoochee, Clarke and 51 more6 hr
Apr 8, 3:45 AM EDTMesoscale DiscussionSPCBanks, Cherokee, Dawson, Forsyth, Franklin, Habersham and 8 more60 min
Apr 8, 7:42 AM EDTMesoscale DiscussionSPCBaldwin, Bibb, Bleckley, Chattahoochee, Crawford, Glascock and 13 more93 min
Apr 8, 8:30 AM EDTMesoscale DiscussionSPCMarlboro2 hr

Nearby

Mesoscale Discussions in Georgia, 2006Mesoscale Discussions in Florida, 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.