Alert archive / Florida / Mesoscale Discussions in 2005

Mesoscale Discussion 338

March 22, 200512 counties in Florida; 8 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2005, 10:38 AM EST for 12 counties in Florida; 8 counties in Georgia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 22, 2005, 10:38 AM EST (15:38 UTC)
Expired: Mar 22, 2005, 12:45 PM 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, Duval County, FL, Flagler County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Union County, FL, Volusia County, FL, Atkinson County, GA, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Glynn County, GA, Pierce County, GA, Ware County, GA

The radar

The Jacksonville radar (KJAX), 55 km from the middle of the area, began a volume at 15:39 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 66Mar 22, 11:05 AM EST

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 3.6 hours before the alert went out and 57 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: 381 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

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
Mar 22, 7:55 AM EST	Tornado Watch	SPC	Escambia, Okaloosa, Santa Rosa	6 hr
Mar 22, 8:38 AM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Holmes, Jackson, Jefferson and 7 more	67 min
Mar 22, 8:40 AM EST	Tornado Watch	SPC	Bay, Calhoun, Dixie, Gadsden, Gulf, Holmes and 10 more	6 hr
Mar 22, 10:44 AM EST	Mesoscale Discussion	SPC	Escambia, Okaloosa, Santa Rosa	61 min
Mar 22, 11:05 AM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 9 more	7 hr
Mar 22, 1:51 PM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Dixie, Gadsden, Gulf, Holmes and 11 more	54 min
Mar 22, 2:20 PM EST	Tornado Watch	SPC	Calhoun, Gadsden, Gulf, Jackson, Jefferson, Lafayette and 5 more	7 hr
Mar 22, 2:37 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Dixie and 15 more	83 min
Mar 22, 4:41 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 9 more	34 min
Mar 22, 5:00 PM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 8 more	6 hr
Mar 22, 6:10 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 6 more	95 min
Mar 22, 9:49 AM EST	Mesoscale Discussion	SPC	Carroll, Chattahoochee, Haralson, Harris, Heard, Muscogee and 2 more	26 min
Mar 22, 10:15 AM EST	Severe Thunderstorm Watch	SPC	Bibb, Butts, Carroll, Chattahoochee, Clayton, Coweta and 29 more	6 hr
Mar 22, 11:54 AM EST	Mesoscale Discussion	SPC	Appling, Baldwin, Bleckley, Bryan, Bulloch, Burke and 34 more	36 min
Mar 22, 1:20 PM EST	Severe Thunderstorm Watch	SPC	Appling, Baldwin, Bleckley, Bryan, Bulloch, Burke and 36 more	7 hr
Mar 22, 3:05 PM EST	Mesoscale Discussion	SPC	Bibb, Butts, Carroll, Chattahoochee, Clayton, Coweta and 32 more	25 min

Nearby

Mesoscale Discussions in Florida, 2005 Mesoscale Discussions in Georgia, 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.