Alert archive / Florida / Mesoscale Discussions in 2003

Mesoscale Discussion 168

February 27, 200319 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2003, 10:26 AM EST for 19 counties in Florida. It was in force for 34 min.

The area

The outline as issued.

The facts

Issued: Feb 27, 2003, 10:26 AM EST (15:26 UTC)
Expired: Feb 27, 2003, 11:00 AM EST
In force: 34 min
Issued by: the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Levy County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 3.4 hours before the alert went out and 127 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: 68 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 393 m²/s²
0-3 km storm-relative helicity: 668 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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
Feb 27, 3:31 AM EST	Mesoscale Discussion	SPC	Bay	119 min
Feb 27, 5:24 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 7 more	2 hr
Feb 27, 5:55 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 13 more	5 hr
Feb 27, 8:00 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 13 more	2 hr

Nearby

Mesoscale Discussions in Florida, 2003 Every mesoscale discussion in 2003

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.