Alert archive / Georgia / Mesoscale Discussions in 2008

Mesoscale Discussion 895

May 11, 20084 counties in Florida; 21 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at May 11, 2008, 4:43 PM EDT for 4 counties in Florida; 21 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2008, 4:43 PM EDT (20:43 UTC)
Expired
May 11, 2008, 6:45 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 25 counties

Hamilton County, FL, Jefferson County, FL, Madison County, FL, Nassau County, FL, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Cook County, GA, Echols County, GA, Glynn County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Pierce County, GA, Thomas County, GA, Ware County, GA, Wayne County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.7 hours before the alert went out and 84 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 2008-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1555 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 2008-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 248 square meters per square second.1939587897Sfc1 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
1555 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
248 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
2.0
Supercell composite
8.9

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
May 11, 5:38 AM EDTMesoscale DiscussionSPCBaker, Bradford, Clay, Columbia, Duval, Gadsden and 12 more67 min
May 11, 5:52 AM EDTTornado WatchSPCBaker, Bay, Calhoun, Columbia, Duval, Franklin and 16 more8 hr
May 11, 7:24 AM EDTMesoscale DiscussionSPCBaker, Calhoun, Columbia, Duval, Gadsden, Hamilton and 8 more96 min
May 11, 8:51 AM EDTMesoscale DiscussionSPCBaker, Duval, Gadsden, Hamilton, Jackson, Leon and 3 more84 min
May 11, 12:15 PM EDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 14 more60 min
May 11, 2:24 PM EDTMesoscale DiscussionSPCBaker, Bradford, Calhoun, Clay, Columbia, Duval and 13 more66 min
May 11, 2:42 PM EDTTornado WatchSPCBaker, Columbia, Hamilton, Jefferson, Madison, Nassau and 1 more5 hr
May 10, 8:14 PM EDTMesoscale DiscussionSPCAppling, Baldwin, Bibb, Bleckley, Bryan, Bulloch and 77 more2 hr
May 10, 9:54 PM EDTMesoscale DiscussionSPCAppling, Bacon, Baldwin, Ben Hill, Bibb, Bleckley and 88 more96 min
May 10, 10:06 PM EDTTornado WatchSPCAppling, Bacon, Baldwin, Banks, Barrow, Bartow and 112 more7 hr
May 11, 12:32 AM EDTMesoscale DiscussionSPCChattooga, Dade, Floyd, Haralson, Polk, Walker118 min
May 11, 2:06 AM EDTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 93 more84 min
May 11, 2:37 AM EDTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 100 more7 hr
May 11, 4:40 AM EDTMesoscale DiscussionSPCAppling, Baldwin, Barrow, Bibb, Bleckley, Bryan and 87 more95 min
May 11, 6:13 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Baldwin, Ben Hill and 62 more92 min
May 11, 7:06 PM EDTMesoscale DiscussionSPCBryan, Chatham, Effingham, Liberty, Long, McIntosh84 min

Nearby

Mesoscale Discussions in Georgia, 2008Mesoscale Discussions in Florida, 2008Every mesoscale discussion in 2008

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.