Alert archive / Florida / Mesoscale Discussions in 2008

Mesoscale Discussion 2402

November 30, 200810 counties in Florida

The Storm Prediction Center issued this mesoscale discussion at Nov 30, 2008, 7:54 AM EST for 10 counties in Florida. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Nov 30, 2008, 7:54 AM EST (12:54 UTC)
Expired: Nov 30, 2008, 9:30 AM EST
In force: 96 min
Issued by: the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Columbia County, FL, Dixie County, FL, Gilchrist County, FL, Lafayette County, FL, Levy County, FL, Suwannee County, FL, Union County, FL

The watches that followed

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

Tornado Watch 939Nov 30, 9:50 AM EST

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 0.9 hours before the alert went out and 148 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: 996 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 318 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
Nov 30, 3:46 AM EST	Mesoscale Discussion	SPC	Columbia, Franklin, Hamilton, Jefferson, Lafayette, Leon and 4 more	89 min
Nov 30, 4:59 AM EST	Tornado Watch	SPC	Columbia, Dixie, Franklin, Gilchrist, Hamilton, Jefferson and 6 more	7 hr
Nov 30, 9:51 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Citrus, Clay, Duval and 18 more	7 hr
Nov 30, 12:24 PM EST	Mesoscale Discussion	SPC	Flagler, Hillsborough, Lake, Marion, Orange, Osceola and 6 more	96 min
Nov 30, 1:05 PM EST	Tornado Watch	SPC	Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 13 more	8 hr
Nov 30, 3:53 PM EST	Mesoscale Discussion	SPC	Broward, Collier, Hendry, Martin, Miami-Dade, Monroe and 2 more	2 hr

Nearby

Mesoscale Discussions in Florida, 2008 Every mesoscale discussion in 2008

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.