Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 2569

December 22, 20044 counties in Alabama; 9 counties in Florida; Early County, Miller County, Seminole County, Georgia

The Storm Prediction Center issued this mesoscale discussion at Dec 22, 2004, 11:46 PM CST for 4 counties in Alabama; 9 counties in Florida; Early County, Miller County, Seminole County, Georgia. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Dec 22, 2004, 11:46 PM CST (05:46 UTC)
Expired
Dec 23, 2004, 12:45 AM CST
In force
59 min
Issued by
the Storm Prediction Center

Counties Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Early County, GA, Miller County, GA, Seminole County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 5.8 hours before the alert went out and 189 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 00:00Z on 2004-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2004-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1309 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Dec 22, 7:05 PM CSTTornado WatchSPCCoffee, Conecuh, Covington, Dale, Escambia, Geneva and 2 more6 hr
Dec 22, 9:26 PM CSTMesoscale DiscussionSPCCoffee, Covington, Dale, Geneva, Henry, Houston64 min
Dec 23, 2:35 AM CSTMesoscale DiscussionSPCFranklin, Gulf, Wakulla115 min

Nearby

Mesoscale Discussions in Florida, 2004Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Georgia, 2004Every mesoscale discussion in 2004

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.