Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 378, NWS Morristown, TN

August 4, 2006Anderson County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 4, 2006, 2:10 PM EDT for Anderson County, Tennessee. It was in force for 35 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 4, 2006, 2:10 PM EDT (18:10 UTC)
Expired
Aug 4, 2006, 2:45 PM EDT
In force
35 min
Issued by
NWS Morristown, TN
Area
Counties, with a storm outline in the text

County Anderson County, TN

The radar

The Knoxville radar (KMRX), 72 km from the middle of the area, began a volume at 18:12 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, 6.2 hours before the alert went out and 216 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 2006-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 368 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 2006-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 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
368 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1339 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 10:00 AM EDT, 4 hours 10 minutes earlier.

Area forecast discussion, Aug 4, 10:00 AM EDT, 4 hours 10 minutes before
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Hazardous weather outlook, Aug 4, 11:20 AM EDT, 2 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
1120 AM EDT FRI AUG 4 2006

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-051200-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW BLOUNT-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-
SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-
WISE-SCOTT-RUSSELL-WASHINGTON-

1120 AM EDT FRI AUG 4 2006/1020 AM CDT FRI AUG 4 2006/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND
EVENING...

A WEAK COLD FRONT WILL MOVE TOWARD THE TENNESSEE VALLEY AND SOUTHERN
APPALACHIANS THIS AFTERNOON AND EVENING PRODUCING SCATTERED
THUNDERSTORMS.  SOME OF THESE STORMS COULD BECOME SEVERE WITH THE
MAIN THREAT BEING DAMAGING DOWNBURST WINDS AND HEAVY RAINS...
WHICH MAY PRODUCE LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON AND EVENING.

DH

In the hours before

Local storm report, Aug 4, 10:03 AM EDT, 4 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MORRISTOWN TN
1003 AM EDT FRI AUG 04 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0350 PM     TSTM WND DMG     ABINGDON                36.71N 81.97W
08/03/2006                   WASHINGTON         VA   UTILITY COMPANY

            TREES DOWN ON POWER LINES ON MOCK KNOB ROAD IN ABINGDON.
            REPORTED BY BRISTOL POWER.

0415 PM     TSTM WND DMG     KYLES FORD              36.57N 83.04W
08/03/2006                   HANCOCK            TN   LAW ENFORCEMENT

            TREES DOWN REPORTED BY SHERIFFS OFFICE.

0615 PM     TSTM WND DMG     5 NNE BRISTOL VA        36.68N 82.13W
08/03/2006                   WASHINGTON         VA   LAW ENFORCEMENT

            ONE TREE DOWN ON PINE HILL ROAD. REPORTED BY DISPATCH.

0620 PM     TSTM WND DMG     ABINGDON                36.71N 81.97W
08/03/2006                   WASHINGTON         VA   LAW ENFORCEMENT

            ONE TREE DOWN ON SPRING CREEK ROAD IN ABINGDON. REPORTED
            BY DISPATCH.

0630 PM     TSTM WND DMG     BRISTOL VA              36.61N 82.17W
08/03/2006                   CITY OF BRISTOL    VA   UTILITY COMPANY

            NUMEROUS TREES AND POWER LINES DOWN EAST BRISTOL NEAR OLD
            JONESBORO ROAD. REPORTED BY BRISTOL POWER.

&&

MEP
Special weather statement, Aug 4, 2:01 PM EDT, 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
201 PM EDT FRI AUG 4 2006

TNZ036-041845-
ANDERSON-
201 PM EDT FRI AUG 4 2006

...A STRONG THUNDERSTORM WAS AFFECTING ANDERSON COUNTY...

AT 159 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES WEST OF CLINTON....MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  CLINTON BY 215 PM EDT.

WINDS AROUND 40 MPH ARE EXPECTED WITH THIS STORM.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES PRIMARY KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

DMG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 1:41 PM EDTSevere Thunderstorm WarningMRXMorgan49 min
Aug 4, 2:15 PM EDTSevere Thunderstorm WarningMRXKnox60 min
Aug 4, 2:28 PM EDTSevere Thunderstorm WarningMRXMorgan47 min
Aug 4, 2:33 PM EDTSevere Thunderstorm WarningMRXRoane42 min
Aug 4, 2:37 PM EDTSevere Thunderstorm WarningMRXSullivan23 min
Aug 4, 2:54 PM EDTSevere Thunderstorm WarningMRXBlount66 min
Aug 4, 3:15 PM EDTSevere Thunderstorm WarningMRXKnox20 min
Aug 4, 3:21 PM EDTFlash Flood WarningMRXKnox114 min
Aug 4, 3:22 PM EDTSevere Thunderstorm WarningMRXGrainger, Jefferson53 min
Aug 4, 3:24 PM EDTSevere Thunderstorm WarningMRXSevier66 min
Aug 4, 3:39 PM EDTSevere Thunderstorm WarningMRXLoudon, McMinn, Meigs, Monroe, Roane66 min
Aug 4, 3:48 PM EDTSevere Thunderstorm WarningMRXWashington42 min
Aug 4, 5:14 PM EDTSevere Thunderstorm WarningMRXSequatchie31 min
Aug 4, 5:25 PM EDTSevere Thunderstorm WarningMRXHamilton65 min
Aug 4, 5:53 PM EDTSevere Thunderstorm WarningMRXBledsoe41 min
Aug 4, 6:01 PM EDTSevere Thunderstorm WarningMRXBradley44 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.