Alert archive / Tennessee / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 305, NWS Morristown, TN

December 28, 2005Blount County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Dec 28, 2005, 5:56 PM EST for Blount County, Tennessee. It was in force for 49 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
Dec 28, 2005, 5:56 PM EST (22:56 UTC)
Expired
Dec 28, 2005, 6:45 PM EST
In force
49 min
Issued by
NWS Morristown, TN
Area
Counties, with a storm outline in the text

County Blount County, TN

The radar

The Knoxville radar (KMRX), 71 km from the middle of the area, began a volume at 22:59 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, 10.9 hours before the alert went out and 246 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 2005-12-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 106 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 2005-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 345 square meters per square second.1939587897117Sfc1 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
106 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
736 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
345 m²/s²
0-3 km storm-relative helicity
356 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 Dec 28, 5:36 PM EST, 20 minutes earlier.

Area forecast discussion, Dec 28, 5:36 PM EST, 20 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
536 PM EST WED DEC 28 2005

SEVERE WEATHER DISCUSSION...AXIS OF UNSTABLE AIR CONTINUES TO SUPPLY
CONVECTIVE UPDRAFTS AT THIS HOUR.  WITH TEMPERATURES IN THE LOWER
60S THROUGHOUT MOST OF EAST TENNESSEE AHEAD OF THE STORMS.  DEW
POINTS RANGE FROM THE MID 40S ALONG THE VA BORDER TO THE MID 50S
ALONG THE GA BORDER.  LIFTED INDEX VALUES RANGE FROM ABOUT 1.5 ALONG
THE VA BORDER TO 3.5 DEGREES ALONG THE GA BORDER.

STORMS IN THE NORTHERN PART OF THE CWA...APPROACHING THE TRI CITIES
AREA...HAVE GONE THROUGH SOME MORE STABLE AIR OVER THE PAST
HOUR...BUT ARE APPROACHING BETTER INSTABILITY.  TIMING OF THE
EVENING COOLING IS TOUGH TO CALL...BUT STORMS COULD STRENGTHEN AGAIN
IN THIS AREA.

ALONG THE GA BORDER STRONG INSTABILITY AND BACKED WINDS ARE KEEPING
CONVECTION VERY WELL ORGANIZED.

SPC GRAPHICS ARE SHOWING GOOD CHANCES OF MID LEVEL ROTATION...BUT
MUCH LESS CHANCES OF ORGANIZED LOW LEVEL CIRCULATIONS.  CLOSE LOOK
DOESNT SHOW ANY SURFACE BOUNDARIES AHEAD OF THE CONVECTIVE
LINE...SO LOW LEVEL CIRCULATIONS WOULD MAY HAVE TO DEPEND ON LOCAL
TERRAIN.  STILL EXPECTING DAMAGING OUTFLOW THUNDERSTORM WINDS AND
MID LEVEL CIRCULATIONS...BUT THE PRIME TORNADO THREAT CONTINUES TO
BE IN THE SOUTHERN HALF OF GEORGIA.

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&

GM
Hazardous weather outlook, Dec 28, 9:52 AM EST, 8 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
952 AM EST WED DEC 28 2005

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005-
006-008-291000-
ANDERSON-BLEDSOE-BLOUNT SMOKY MTN-BRADLEY-CAMPBELL-CHEROKEE-
CLAIBORNE-CLAY-COCKE SMOKY MTN-EAST POLK-GRAINGER-HAMBLEN-HAMILTON-
HANCOCK-HAWKINS-JEFFERSON-JOHNSON-KNOX-LEE-LOUDON-MARION-MCMINN-
MEIGS-MORGAN-NORTH SEVIER-NORTHWEST CARTER-NORTHWEST COCKE-
NORTHWEST GREENE-NORTHWEST MONROE-NW BLOUNT-RHEA-ROANE-RUSSELL-
SCOTT TN-SCOTT VA-SEQUATCHIE-SEVIER SMOKY MTN-SOUTHEAST CARTER-
SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-UNION-
WASHINGTON TN-WASHINGTON VA-WEST POLK-WISE-
952 AM EST (852 AM CST) WED DEC 28 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWESTERN
VIRGINIA AND EXTREME SOUTHWESTERN NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT

A DEEP UPPER TROUGH OF LOW PRESSURE AND ASSOCIATED COLD FRONT WILL
MOVE EAST ACROSS EAST TENNESSEE...SOUTHWEST VIRGINIA...AND SOUTHWEST
NORTH CAROLINA THIS AFTERNOON AND EARLY EVENING.  INCREASING SOUTHERLY
WINDS AHEAD OF THIS SYSTEM WILL PULL MOISTURE BACK INTO THE REGION.
AS THE COLD FRONT MOVES ACROSS THE TENNESSEE VALLEY...SHOWERS
AND THUNDERSTORMS WILL DEVELOP OVER MIDDLE TENNESSEE AND
ALABAMA...THEN SWEEP ACROSS THE REGION THIS AFTERNOON AND EARLY
EVENING.  DUE TO THE COLD AIR ALOFT...SOME OF THESE STORMS MAY
PRODUCE LARGE HAIL UP TO NICKEL SIZE.  ALSO...THE STRONG WINDS ALOFT
MAY PRODUCE ISOLATED DAMAGING WINDS WITH THE STRONGER THUNDERSTORMS.

THE GREATEST THREAT FOR SEVERE THUNDERSTORMS WILL BE ALONG AND SOUTH
OF A LINE FROM ONEIDA TO KNOXVILLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.

PLEASE STAY TUNED TO NOAA WEATHER RADIO OR VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/MRX.

DH

In the hours before

Local storm report, Dec 28, 5:43 PM EST, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
543 PM EST WED DEC 28 2005

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

0520 PM     HAIL             JONESVILLE              36.69N 83.12W
12/28/2005  0.75 INCH        LEE                VA   AMATEUR RADIO

&&
Local storm report, Dec 28, 5:47 PM EST, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
547 PM EST WED DEC 28 2005

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

0450 PM     TSTM WND DMG     ATHENS                  35.45N 84.60W
12/28/2005                   MCMINN             TN   LAW ENFORCEMENT

            FEW TREES DOWN.

&&
Local storm report, Dec 28, 5:49 PM EST, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
549 PM EST WED DEC 28 2005

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

0450 PM     TSTM WND DMG     TEN MILE                35.67N 84.67W
12/28/2005                   MEIGS              TN   TRAINED SPOTTER

            FEW TREES DOWN.

&&
Local storm report, Dec 28, 5:50 PM EST, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
550 PM EST WED DEC 28 2005

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

0545 PM     HAIL             PENNINGTON GAP          36.76N 83.03W
12/28/2005  0.88 INCH        LEE                VA   TRAINED SPOTTER

&&
Local storm report, Dec 28, 5:51 PM EST, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
551 PM EST WED DEC 28 2005

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

0515 PM     TSTM WND DMG     LENOIR CITY             35.80N 84.27W
12/28/2005                   LOUDON             TN   LAW ENFORCEMENT

            FEW TREES DOWN COUNTYWIDE.

&&
Local storm report, Dec 28, 5:54 PM EST, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
554 PM EST WED DEC 28 2005

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

0540 PM     HAIL             BUFFALO SPRINGS         36.22N 83.57W
12/28/2005  0.75 INCH        GRAINGER           TN   TRAINED SPOTTER

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 28, 2:18 PM ESTSevere Thunderstorm WarningMRXBledsoe, Sequatchie57 min
Dec 28, 3:06 PM ESTSevere Thunderstorm WarningMRXMarion39 min
Dec 28, 3:06 PM ESTSevere Thunderstorm WarningMRXMorgan24 min
Dec 28, 3:34 PM ESTSevere Thunderstorm WarningMRXRhea, Roane56 min
Dec 28, 3:40 PM ESTSevere Thunderstorm WarningMRXMeigs35 min
Dec 28, 4:05 PM ESTSevere Thunderstorm WarningMRXCampbell, Union40 min
Dec 28, 4:12 PM ESTSevere Thunderstorm WarningMRXMcMinn, Meigs63 min
Dec 28, 4:15 PM ESTSevere Thunderstorm WarningMRXLoudon45 min
Dec 28, 4:19 PM ESTSevere Thunderstorm WarningMRXHamilton41 min
Dec 28, 4:24 PM ESTSevere Thunderstorm WarningMRXClaiborne66 min
Dec 28, 4:28 PM ESTSevere Thunderstorm WarningMRXAnderson, Knox62 min
Dec 28, 4:41 PM ESTSevere Thunderstorm WarningMRXUnion49 min
Dec 28, 4:43 PM ESTSevere Thunderstorm WarningMRXBradley47 min
Dec 28, 4:53 PM ESTSevere Thunderstorm WarningMRXHancock67 min
Dec 28, 4:57 PM ESTSevere Thunderstorm WarningMRXBlount, Loudon63 min
Dec 28, 5:15 PM ESTSevere Thunderstorm WarningMRXGrainger45 min
Dec 28, 5:18 PM ESTSevere Thunderstorm WarningMRXMonroe, Polk42 min
Dec 28, 5:41 PM ESTSevere Thunderstorm WarningMRXHamblen, Jefferson64 min
Dec 28, 6:01 PM ESTSevere Thunderstorm WarningMRXPolk29 min
Dec 28, 6:18 PM ESTSevere Thunderstorm WarningMRXHawkins57 min
Dec 28, 6:13 PM ESTSevere Thunderstorm WarningMRXWise, City of Norton41 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2005Every severe thunderstorm warning in 2005

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.