Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 283

April 7, 2004Bay County, Calhoun County, Gulf County, Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2004, 2:24 PM CDT for Bay County, Calhoun County, Gulf County, Florida. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Apr 7, 2004, 2:24 PM CDT (19:24 UTC)
Expired
Apr 7, 2004, 4:00 PM CDT
In force
96 min
Issued by
the Storm Prediction Center

Counties Bay County, FL, Calhoun County, FL, Gulf County, FL

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 272 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 2004-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 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 2004-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.193958Sfc1 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
39 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
652 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
105 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
Apr 7, 5:06 PM CDTMesoscale DiscussionSPCEscambia114 min

Nearby

Mesoscale Discussions in Florida, 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.