Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 378, NWS Nashville, TN

August 29, 2006Macon County, Trousdale County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Aug 29, 2006, 3:07 PM CDT for Macon County, Trousdale County, Tennessee. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 29, 2006, 3:07 PM CDT (20:07 UTC)
Expired
Aug 29, 2006, 3:45 PM CDT
In force
38 min
Issued by
NWS Nashville, TN
Area
Counties, with a storm outline in the text

Counties Macon County, TN, Trousdale County, TN

The radar

The Nashville radar (KOHX), 49 km from the middle of the area, began a volume at 20:07 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 12:00Z, 8.1 hours before the alert went out and 59 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 2006-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1113 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 2006-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 square meters per square second.193958Sfc1 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
1113 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 3:01 PM CDT, 6 minutes earlier.

Area forecast discussion, Aug 29, 3:01 PM CDT, 6 minutes before
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Hazardous weather outlook, Aug 29, 4:20 AM CDT, 10 hours 47 minutes before
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In the hours before

Special weather statement, Aug 29, 2:58 PM CDT, 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
258 PM CDT TUE AUG 29 2006

TNZ005>011-022>034-056>066-075-077>080-093>095-292100-
BEDFORD-BENTON-CANNON-CHEATHAM-CLAY-COFFEE-CUMBERLAND-DAVIDSON-
DEKALB-DICKSON-FENTRESS-GILES-GRUNDY-HICKMAN-HOUSTON-HUMPHREYS-
JACKSON-LAWRENCE-LEWIS-MACON-MARSHALL-MAURY-MONTGOMERY-OVERTON-PERRY-
PICKETT-PUTNAM-ROBERTSON-RUTHERFORD-SMITH-STEWART-SUMNER-TROUSDALE-
VAN BUREN-WARREN-WAYNE-WHITE-WILLIAMSON-WILSON-
258 PM CDT TUE AUG 29 2006

...THUNDERSTORMS RUMBLING THROUGH MIDDLE TENNESSEE...

THUNDERSTORMS HAVE INCREASED IN COVERAGE ACROSS MUCH OF MIDDLE
TENNESSEE THIS AFTERNOON. SOME OF THE STORMS ARE CAPABLE OF
PRODUCING HEAVY DOWNPOURS OF RAIN...THAT COULD CAUSE DITCHES TO
QUICKLY FILL WITH WATER. MOTORISTS ARE URGED TO DRIVE WITH
CAUTION...AND NOT CROSS WHERE WATER COVERS THE ROAD. IN ADDITION
TO THE HEAVY DOWNPOURS...FREQUENT CLOUD TO GROUND LIGHTNING STRIKES
CAN BE EXPECTED IN THE STRONGER STORMS.

BOYD

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 3:56 PM CDTSevere Thunderstorm WarningOHXClay, Jackson, Overton49 min
Aug 29, 5:17 PM CDTSevere Thunderstorm WarningOHXFentress13 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2006Every severe thunderstorm warning in 2006

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.