Alert archive / Tennessee / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 170

April 25, 200334 counties in Tennessee

The Storm Prediction Center issued this severe thunderstorm watch at Apr 25, 2003, 4:45 PM CDT for 34 counties in Tennessee. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 25, 2003, 4:45 PM CDT (21:45 UTC)
Expired
Apr 25, 2003, 9:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 34 counties

Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Overton County, TN, Putnam County, TN, Rhea County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 48 km from the middle of the area, began a volume at 21:48 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.

Warnings issued inside it

19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 25, 4:59 PM CDTSevere Thunderstorm WarningOHXRutherford46 min
Apr 25, 5:11 PM CDTSevere Thunderstorm WarningOHXSmith, Wilson34 min
Apr 25, 5:19 PM CDTSevere Thunderstorm WarningOHXBedford, Cannon, Coffee41 min
Apr 25, 5:24 PM CDTSevere Thunderstorm WarningOHXMacon, Trousdale51 min
Apr 25, 5:44 PM CDTSevere Thunderstorm WarningOHXWarren46 min
Apr 25, 5:48 PM CDTSevere Thunderstorm WarningOHXCoffee, Moore42 min
Apr 25, 5:50 PM CDTSevere Thunderstorm WarningOHXWarren40 min
Apr 25, 5:54 PM CDTSevere Thunderstorm WarningOHXFranklin41 min
Apr 25, 6:03 PM CDTSevere Thunderstorm WarningOHXDeKalb, Putnam27 min
Apr 25, 6:10 PM CDTSevere Thunderstorm WarningOHXGrundy50 min
Apr 25, 6:40 PM CDTSevere Thunderstorm WarningOHXJackson50 min
Apr 25, 6:49 PM CDTSevere Thunderstorm WarningMRXSequatchie26 min
Apr 25, 6:50 PM CDTSevere Thunderstorm WarningOHXVan Buren40 min
Apr 25, 6:51 PM CDTSevere Thunderstorm WarningMRXMarion39 min
Apr 25, 6:56 PM CDTSevere Thunderstorm WarningMRXBledsoe49 min
Apr 25, 7:17 PM CDTSevere Thunderstorm WarningMRXMarion, Sequatchie28 min
Apr 25, 7:19 PM CDTSevere Thunderstorm WarningMRXSequatchie26 min
Apr 25, 7:32 PM CDTSevere Thunderstorm WarningMRXHamilton43 min
Apr 25, 8:23 PM CDTSevere Thunderstorm WarningMRXBradley37 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 44 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 2003-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 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 2003-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.1939587897Sfc1 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
3 J/kg
Mixed-layer CIN
-232 J/kg
Mixed-layer LCL
656 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
296 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 11:45 PM CDTTornado WatchSPCChester, Crockett, Dyer, Fayette, Gibson, Hardeman and 6 more5 hr
Apr 25, 1:15 AM CDTMesoscale DiscussionSPCChester, Crockett, Dyer, Fayette, Gibson, Hardeman and 6 more90 min
Apr 25, 3:05 AM CDTMesoscale DiscussionSPCChester, Crockett, Fayette, Hardeman, Hardin, Haywood and 5 more85 min
Apr 25, 11:04 AM CDTMesoscale DiscussionSPCBenton, Carroll, Chester, Decatur, Dickson, Hardin and 12 more116 min
Apr 25, 11:50 AM CDTSevere Thunderstorm WatchSPCBedford, Benton, Bledsoe, Bradley, Cannon, Cheatham and 43 more5 hr
Apr 25, 1:55 PM CDTMesoscale DiscussionSPCCheatham, Davidson, Dickson, Hickman, Houston, Lewis and 4 more2 hr
Apr 25, 3:22 PM CDTMesoscale DiscussionSPCBedford, Cannon, Cheatham, Davidson, DeKalb, Dickson and 20 more113 min
Apr 25, 4:40 PM CDTTornado WatchSPCClay, Macon4 hr
Apr 25, 6:48 PM CDTMesoscale DiscussionSPCBledsoe, Bradley, Clay, Cumberland, DeKalb, Fentress and 13 more87 min

Nearby

Severe Thunderstorm Watches in Tennessee, 2003Every severe thunderstorm watch 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.