Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 2539

December 5, 20054 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Dec 5, 2005, 6:16 PM EST for 4 counties in Florida. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Dec 5, 2005, 6:16 PM EST (23:16 UTC)
Expired: Dec 5, 2005, 8:15 PM EST
In force: 119 min
Issued by: the Storm Prediction Center

Counties Citrus County, FL, Hernando County, FL, Levy County, FL, Pasco County, FL

The radar

The Tampa radar (KTBW), 138 km from the middle of the area, began a volume at 23:19 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 nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.3 hours before the alert went out and 217 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: 184 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 697 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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
Dec 5, 3:39 AM EST	Mesoscale Discussion	SPC	Holmes, Jackson, Walton, Washington	66 min
Dec 5, 12:28 PM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 6 more	32 min
Dec 5, 12:50 PM EST	Tornado Watch	SPC	Baker, Columbia, Gilchrist, Hamilton, Suwannee, Union	6 hr
Dec 5, 3:39 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Columbia, Dixie, Franklin and 10 more	96 min
Dec 5, 4:57 PM EST	Mesoscale Discussion	SPC	Baker, Columbia, Dixie, Gilchrist, Lafayette, Suwannee and 1 more	63 min

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; radar from the NEXRAD Level II archive.