Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 478

April 1, 200516 counties in Florida; 7 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2005, 2:16 PM EST for 16 counties in Florida; 7 counties in Georgia. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2005, 2:16 PM EST (19:16 UTC)
Expired: Apr 1, 2005, 4:15 PM EST
In force: 119 min
Issued by: the Storm Prediction Center

All 23 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Franklin County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Pierce County, GA, Ware County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.3 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 1, 2:29 AM EST	Mesoscale Discussion	SPC	Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington	2 hr
Apr 1, 3:05 AM EST	Tornado Watch	SPC	Escambia, Okaloosa, Santa Rosa, Walton	5 hr
Apr 1, 8:44 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bay, Bradford, Calhoun, Columbia and 16 more	2 hr
Apr 1, 11:30 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more	8 hr
Apr 1, 6:23 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Calhoun, Clay, Columbia and 17 more	67 min
Apr 1, 5:55 PM EST	Mesoscale Discussion	SPC	Bartow, Catoosa, Chattooga, Dade, Fannin, Floyd and 7 more	65 min

Nearby

Mesoscale Discussions in Florida, 2005 Mesoscale Discussions in Georgia, 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.