Alert archive / Florida / Mesoscale Discussions in 2003

Mesoscale Discussion 1564

June 30, 20037 counties in Alabama; 16 counties in Florida; 11 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2003, 7:22 PM CDT for 7 counties in Alabama; 16 counties in Florida; 11 counties in Georgia. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2003, 7:22 PM CDT (00:22 UTC)
Expired: Jun 30, 2003, 9:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 34 counties

Coffee County, AL, Covington County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Pike County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA

The watches that followed

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

Tornado Watch 610Jun 30, 9:40 PM CDT

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 0.4 hours before the alert went out and 60 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: 2098 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

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
Jun 30, 9:40 PM CDT	Tornado Watch	SPC	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 5 more	5 hr
Jul 1, 1:25 AM CDT	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 41 more	9 hr
Jul 1, 4:26 AM CDT	Mesoscale Discussion	SPC	Autauga, Baldwin, Barbour, Bibb, Bullock, Butler and 41 more	2 hr
Jul 1, 7:28 AM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Calhoun, Chambers, Clay, Cleburne and 15 more	62 min
Jul 1, 9:40 AM CDT	Tornado Watch	SPC	Barbour, Bullock, Calhoun, Chambers, Clay, Cleburne and 16 more	6 hr
Jul 1, 12:57 PM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Chambers, Henry, Lee, Macon and 3 more	2 hr
Jul 1, 2:49 PM CDT	Mesoscale Discussion	SPC	Barbour, Chambers, Cleburne, Henry, Houston, Lee and 2 more	116 min
Jul 1, 3:05 PM CDT	Tornado Watch	SPC	Bay, Calhoun, Columbia, Gadsden, Hamilton, Jackson and 6 more	6 hr
Jul 1, 4:26 PM CDT	Mesoscale Discussion	SPC	Bryan, Chatham, Effingham, Liberty	94 min
Jul 1, 5:00 PM CDT	Tornado Watch	SPC	Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 21 more	4 hr

Nearby

Mesoscale Discussions in Florida, 2003 Mesoscale Discussions in Georgia, 2003 Mesoscale Discussions in Alabama, 2003 Every mesoscale discussion in 2003

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.