Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 2566

December 22, 2004Baldwin County, Escambia County, Mobile County, Alabama; 8 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Dec 22, 2004, 4:58 PM CST for Baldwin County, Escambia County, Mobile County, Alabama; 8 counties in Florida. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Dec 22, 2004, 4:58 PM CST (22:58 UTC)
Expired
Dec 22, 2004, 6:00 PM CST
In force
62 min
Issued by
the Storm Prediction Center

Counties Baldwin County, AL, Escambia County, AL, Mobile County, AL, Bay County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.0 hours before the alert went out and 252 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, Slidell Radar S, LA at 12:00Z on 2004-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 75 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, Slidell Radar S, LA at 12:00Z on 2004-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 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
75 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
242 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, 2:45 PM CSTTornado WatchSPCChoctaw, Clarke, Washington6 hr

Nearby

Mesoscale Discussions in Florida, 2004Mesoscale Discussions in Alabama, 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.