Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 1025

May 31, 20049 counties in Florida; Camden County, Charlton County, Georgia

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 6:28 PM EDT for 9 counties in Florida; Camden County, Charlton County, Georgia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 31, 2004, 6:28 PM EDT (22:28 UTC)
Expired: May 31, 2004, 8:00 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Gilchrist County, FL, Nassau County, FL, Union County, FL, Camden County, GA, Charlton County, GA

The radar

The Jacksonville radar (KJAX), 54 km from the middle of the area, began a volume at 22:32 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 361May 31, 7:30 PM EDT

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 10.5 hours before the alert went out and 54 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: 583 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1193 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.8

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
May 31, 10:21 AM EDT	Mesoscale Discussion	SPC	Bay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 9 more	54 min
May 31, 11:00 AM EDT	Tornado Watch	SPC	Escambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more	6 hr
May 31, 11:18 AM EDT	Mesoscale Discussion	SPC	Nassau	27 min
May 31, 11:40 AM EDT	Severe Thunderstorm Watch	SPC	Hamilton	6 hr
May 31, 2:06 PM EDT	Mesoscale Discussion	SPC	Escambia, Gadsden, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more	54 min
May 31, 2:27 PM EDT	Mesoscale Discussion	SPC	Hamilton	63 min
May 31, 3:10 PM EDT	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 5 more	5 hr
May 31, 4:30 PM EDT	Tornado Watch	SPC	Bay, Calhoun, Gadsden, Hamilton, Holmes, Jackson and 5 more	4 hr
May 31, 6:59 PM EDT	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more	61 min
May 31, 7:30 PM EDT	Tornado Watch	SPC	Baker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more	4 hr
May 30, 10:15 PM EDT	Tornado Watch	SPC	Dade	7 hr
May 31, 12:05 AM EDT	Mesoscale Discussion	SPC	Dade	55 min
May 31, 1:40 AM EDT	Tornado Watch	SPC	Banks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more	5 hr
May 31, 2:06 AM EDT	Mesoscale Discussion	SPC	Dade	84 min
May 31, 4:40 AM EDT	Mesoscale Discussion	SPC	Banks, Bartow, Catoosa, Chattooga, Cherokee, Dawson and 21 more	95 min
May 31, 4:45 AM EDT	Tornado Watch	SPC	Barrow, Butts, Carroll, Clayton, Cobb, Coweta and 22 more	5 hr
May 31, 6:31 AM EDT	Mesoscale Discussion	SPC	Butts, Carroll, Clayton, Cobb, Coweta, Crawford and 20 more	119 min
May 31, 9:10 AM EDT	Severe Thunderstorm Watch	SPC	Burke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more	5 hr

Nearby

Mesoscale Discussions in Florida, 2004 Mesoscale Discussions in Georgia, 2004 Every mesoscale discussion in 2004

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.