Alert archive / Florida / Mesoscale Discussions in 2006

Mesoscale Discussion 55

January 13, 20069 counties in Florida; 5 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 13, 2006, 4:36 PM EST for 9 counties in Florida; 5 counties in Georgia. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Jan 13, 2006, 4:36 PM EST (21:36 UTC)
Expired: Jan 13, 2006, 6:00 PM EST
In force: 84 min
Issued by: the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Duval County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Glynn County, GA, Pierce County, GA

The radar

The Jacksonville radar (KJAX), 17 km from the middle of the area, began a volume at 21:36 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 19Jan 13, 4:45 PM EST

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.6 hours before the alert went out and 18 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 925 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 64 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
Jan 13, 6:20 AM EST	Mesoscale Discussion	SPC	Escambia, Okaloosa, Santa Rosa	85 min
Jan 13, 8:11 AM EST	Tornado Watch	SPC	Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more	7 hr
Jan 13, 11:15 AM EST	Mesoscale Discussion	SPC	Baker, Bay, Calhoun, Columbia, Gadsden, Hamilton and 10 more	90 min
Jan 13, 1:03 PM EST	Tornado Watch	SPC	Columbia, Dixie, Franklin, Gadsden, Hamilton, Jefferson and 7 more	8 hr
Jan 13, 1:55 PM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Gulf, Hamilton, Holmes and 12 more	95 min
Jan 13, 4:45 PM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Duval, Flagler and 6 more	7 hr
Jan 13, 5:48 PM EST	Mesoscale Discussion	SPC	Brevard, Broward, Highlands, Indian River, Martin, Okeechobee and 7 more	117 min
Jan 13, 4:08 PM EST	Mesoscale Discussion	SPC	Bryan, Bulloch, Chatham, Effingham, Evans, Jenkins and 5 more	97 min
Jan 13, 6:17 PM EST	Tornado Watch	SPC	Burke, Columbia, Lincoln, McDuffie, Richmond	7 hr

Nearby

Mesoscale Discussions in Florida, 2006 Mesoscale Discussions in Georgia, 2006 Every mesoscale discussion in 2006

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.