Alert archive / Tennessee / Mesoscale Discussions in 2004

Mesoscale Discussion 1661

July 14, 20049 counties in Kentucky; 20 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2004, 5:17 AM CDT for 9 counties in Kentucky; 20 counties in Tennessee. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 14, 2004, 5:17 AM CDT (10:17 UTC)
Expired: Jul 14, 2004, 6:15 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 29 counties

Allen County, KY, Barren County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Metcalfe County, KY, Monroe County, KY, Simpson County, KY, Warren County, KY, Anderson County, TN, Clay County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Jackson County, TN, Loudon County, TN, Macon County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Roane County, TN, Robertson County, TN, Scott County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, White County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 88 km from the middle of the area, began a volume at 10:18 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, 10.3 hours before the alert went out and 96 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: 2877 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1306 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
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
Jul 13, 7:36 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Bell and 66 more	114 min
Jul 13, 8:20 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Clinton, Cumberland, McCreary, Monroe, Simpson and 2 more	6 hr
Jul 13, 10:21 PM CDT	Mesoscale Discussion	SPC	Bell, Calloway, Clay, Harlan, Knox, Leslie and 1 more	114 min
Jul 13, 11:13 PM CDT	Mesoscale Discussion	SPC	Allen, Ballard, Barren, Butler, Caldwell, Calloway and 26 more	2 hr
Jul 14, 12:03 PM CDT	Mesoscale Discussion	SPC	Allen, Bell, Calloway, Clinton, Cumberland, Graves and 13 more	117 min
Jul 14, 7:35 AM CDT	Mesoscale Discussion	SPC	Anderson, Blount, Campbell, Cocke, Grainger, Greene and 11 more	85 min
Jul 14, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	Bedford, Benton, Bledsoe, Bradley, Cannon, Carroll and 47 more	5 hr
Jul 14, 3:44 PM CDT	Mesoscale Discussion	SPC	Bedford, Benton, Bledsoe, Bradley, Cannon, Carroll and 45 more	91 min

Nearby

Mesoscale Discussions in Tennessee, 2004 Mesoscale Discussions in Kentucky, 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.