Alert archive / Tennessee / Mesoscale Discussions in 2004

Mesoscale Discussion 1009

May 30, 20044 states

The Storm Prediction Center issued this mesoscale discussion at May 30, 2004, 11:05 PM CDT for 4 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: May 30, 2004, 11:05 PM CDT (04:05 UTC)
Expired: May 31, 2004, 12:00 AM CDT
In force: 55 min
Issued by: the Storm Prediction Center

All 42 counties

Colbert County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Winston County, AL, Dade County, GA, Itawamba County, MS, Lee County, MS, Pontotoc County, MS, Prentiss County, MS, Tishomingo County, MS, Bedford County, TN, Bledsoe County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Putnam County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Northeast Alabama radar (KHTX), 91 km from the middle of the area, began a volume at 04:05 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.1 hours before the alert went out and 139 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: 2491 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 16.0

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
May 30, 8:54 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 2 more	66 min
May 30, 9:15 PM CDT	Tornado Watch	SPC	Blount, Colbert, Cullman, DeKalb, Etowah, Fayette and 13 more	7 hr
May 31, 12:40 AM CDT	Tornado Watch	SPC	Cherokee	5 hr
May 31, 1:06 AM CDT	Mesoscale Discussion	SPC	Blount, Cullman, DeKalb, Etowah, Fayette, Franklin and 11 more	84 min
May 31, 3:40 AM CDT	Mesoscale Discussion	SPC	Cherokee	95 min
May 31, 3:45 AM CDT	Tornado Watch	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more	5 hr
May 31, 5:31 AM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more	119 min
May 31, 9:21 AM CDT	Mesoscale Discussion	SPC	Baldwin, Coffee, Conecuh, Covington, Crenshaw, Dale and 8 more	54 min
May 31, 10:00 AM CDT	Tornado Watch	SPC	Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more	6 hr
May 31, 1:06 PM CDT	Mesoscale Discussion	SPC	Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more	54 min
May 31, 3:30 PM CDT	Tornado Watch	SPC	Dale, Geneva, Henry, Houston	4 hr
May 31, 8:10 AM CDT	Severe Thunderstorm Watch	SPC	Burke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more	5 hr
May 31, 10:18 AM CDT	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 27 more	27 min
May 31, 10:40 AM CDT	Severe Thunderstorm Watch	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 25 more	6 hr
May 31, 1:27 PM CDT	Mesoscale Discussion	SPC	Atkinson, Brantley, Chatham, Clinch, Echols, Lanier and 6 more	63 min
May 31, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Camden, Charlton	5 hr
May 31, 5:28 PM CDT	Mesoscale Discussion	SPC	Camden, Charlton	92 min
May 31, 5:59 PM CDT	Mesoscale Discussion	SPC	Ben Hill, Berrien, Brooks, Colquitt, Cook, Irwin and 5 more	61 min
May 31, 6:30 PM CDT	Tornado Watch	SPC	Charlton, Echols	4 hr
May 30, 8:55 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Franklin, Hinds and 10 more	65 min
May 30, 10:35 PM CDT	Tornado Watch	SPC	Issaquena	5 hr
May 30, 10:55 PM CDT	Tornado Watch	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 31 more	5 hr
May 31, 1:27 AM CDT	Mesoscale Discussion	SPC	Attala, Choctaw, Holmes, Humphreys, Issaquena, Madison and 4 more	2 hr

Nearby

Mesoscale Discussions in Tennessee, 2004 Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Mississippi, 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.