Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 675

April 23, 200524 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2005, 3:28 AM EDT for 24 counties in Florida. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2005, 3:28 AM EDT (07:28 UTC)
Expired: Apr 23, 2005, 5:00 AM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 24 counties

Alachua County, FL, Bay County, FL, Bradford County, FL, Calhoun County, FL, Dixie County, FL, Flagler County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Jefferson County, FL, Lafayette County, FL, Lake County, FL, Leon County, FL, Levy County, FL, Liberty County, FL, Marion County, FL, Putnam County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Wakulla County, FL, Washington County, FL

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 7.5 hours before the alert went out and 113 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 407 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1494 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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.

Issued	Product	Office	Counties	Lasted
Apr 22, 9:28 PM EDT	Mesoscale Discussion	SPC	Escambia, Santa Rosa	2 hr
Apr 22, 10:15 PM EDT	Mesoscale Discussion	SPC	Baker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more	60 min
Apr 22, 11:58 PM EDT	Mesoscale Discussion	SPC	Baker, Calhoun, Columbia, Franklin, Gadsden, Gilchrist and 9 more	32 min
Apr 23, 12:15 AM EDT	Severe Thunderstorm Watch	SPC	Calhoun, Columbia, Gadsden, Gilchrist, Gulf, Hamilton and 9 more	4 hr

Nearby

Mesoscale Discussions in Florida, 2005 Every mesoscale discussion in 2005

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.