Alert archive / Tennessee / Mesoscale Discussions in 2003

Mesoscale Discussion 1047

May 17, 20036 counties in Kentucky; Cherokee County, Clay County, Graham County, North Carolina; 40 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at May 17, 2003, 2:14 PM EDT for 6 counties in Kentucky; Cherokee County, Clay County, Graham County, North Carolina; 40 counties in Tennessee. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
May 17, 2003, 2:14 PM EDT (18:14 UTC)
Expired
May 17, 2003, 3:45 PM EDT
In force
91 min
Issued by
the Storm Prediction Center
All 49 counties

Bell County, KY, Clinton County, KY, Knox County, KY, McCreary County, KY, Wayne County, KY, Whitley County, KY, Cherokee County, NC, Clay County, NC, Graham County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Claiborne County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grainger County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Knox County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 92 km from the middle of the area, began a volume at 18:13 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.2 hours before the alert went out and 94 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2003-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2003-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1273 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
May 17, 2:30 PM EDTTornado WatchSPCAdair, Anderson, Barren, Bell, Boyle, Breathitt and 46 more6 hr
May 17, 5:40 PM EDTSevere Thunderstorm WatchSPCBell, Clay, Harlan, Knox, Leslie, Letcher and 1 more4 hr
May 17, 12:50 PM EDTTornado WatchSPCCherokee, Clay, Graham5 hr
May 16, 9:38 PM EDTMesoscale DiscussionSPCCrockett, Fayette, Gibson, Hardeman, Haywood, Lauderdale and 3 more97 min
May 16, 10:35 PM EDTTornado WatchSPCChester, Crockett, Decatur, Fayette, Hardeman, Hardin and 7 more6 hr
May 17, 12:41 AM EDTMesoscale DiscussionSPCBedford, Coffee, Decatur, Franklin, Giles, Hardin and 10 more94 min
May 17, 1:55 AM EDTSevere Thunderstorm WatchSPCBedford, Cannon, Coffee, Decatur, Franklin, Giles and 12 more4 hr
May 17, 3:37 AM EDTMesoscale DiscussionSPCBedford, Cannon, Coffee, Franklin, Giles, Lawrence and 6 more53 min
May 17, 6:42 AM EDTMesoscale DiscussionSPCChester, Fayette, Hardeman, Hardin, McNairy63 min

Nearby

Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in North Carolina, 2003Every 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; radar from the NEXRAD Level II archive.