Alert archive / Georgia / Mesoscale Discussions in 2006

Mesoscale Discussion 475

April 8, 2006Geneva County, Henry County, Houston County, Alabama; 14 counties in Florida; 15 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2006, 2:00 PM CDT for Geneva County, Henry County, Houston County, Alabama; 14 counties in Florida; 15 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 8, 2006, 2:00 PM CDT (19:00 UTC)
Expired
Apr 8, 2006, 4:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 32 counties

Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Brooks County, GA, Calhoun County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 50 km from the middle of the area, began a volume at 19:04 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.0 hours before the alert went out and 52 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, Tallahassee Rgnl, FL at 12:00Z on 2006-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1769 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, Tallahassee Rgnl, FL at 12:00Z on 2006-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 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
1769 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
496 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
1.6
Supercell composite
7.9

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
Apr 7, 7:28 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 37 more9 hr
Apr 7, 10:16 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 34 more89 min
Apr 7, 11:05 PM CDTMesoscale DiscussionSPCLauderdale115 min
Apr 8, 2:30 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Butler, Calhoun and 33 more90 min
Apr 8, 6:42 AM CDTMesoscale DiscussionSPCRussell93 min
Apr 8, 8:37 AM CDTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 2 more113 min
Apr 8, 9:00 AM CDTTornado WatchSPCBarbour, Coffee, Covington, Crenshaw, Dale, Escambia and 4 more7 hr
Apr 8, 11:00 AM CDTMesoscale DiscussionSPCBaker, Columbia, Duval, Nassau, Union2 hr
Apr 8, 12:30 PM CDTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 7 more8 hr
Apr 8, 3:22 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Duval and 7 more113 min
Apr 8, 3:45 PM CDTTornado WatchSPCBay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 9 more4 hr
Apr 8, 5:59 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Citrus, Clay, Columbia and 16 more91 min
Apr 7, 8:20 PM CDTTornado WatchSPCBanks, Bartow, Carroll, Catoosa, Chattooga, Cherokee and 25 more10 hr
Apr 8, 2:10 AM CDTTornado WatchSPCBaldwin, Barrow, Bibb, Butts, Chattahoochee, Clarke and 51 more6 hr
Apr 8, 2:45 AM CDTMesoscale DiscussionSPCBanks, Cherokee, Dawson, Forsyth, Franklin, Habersham and 8 more60 min

Nearby

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