Alert archive / Florida / Mesoscale Discussions in 2003

Mesoscale Discussion 165

February 27, 200313 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Feb 27, 2003, 5:24 AM EST for 13 counties in Florida. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 27, 2003, 5:24 AM EST (10:24 UTC)
Expired: Feb 27, 2003, 7:30 AM EST
In force: 2 hr
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, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Putnam County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 112 km from the middle of the area, began a volume at 10:25 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

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

Tornado Watch 25Feb 27, 5:55 AM EST

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 10.4 hours before the alert went out and 172 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: 869 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 101 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.

Issued	Product	Office	Counties	Lasted
Feb 27, 3:31 AM EST	Mesoscale Discussion	SPC	Bay	119 min
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
Feb 27, 10:26 AM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 13 more	34 min

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; radar from the NEXRAD Level II archive.