Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 326, NWS Morristown, TN

July 14, 2006Hamilton County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 14, 2006, 2:23 PM EDT for Hamilton County, Tennessee. It was in force for 37 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: Jul 14, 2006, 2:23 PM EDT (18:23 UTC)
Expired: Jul 14, 2006, 3:00 PM EDT
In force: 37 min
Issued by: NWS Morristown, TN
Area: Counties, with a storm outline in the text

County Hamilton County, TN

The radar

The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 18:26 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, 6.4 hours before the alert went out and 167 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 755 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1175 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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 Jul 14, 2:09 PM EDT, 14 minutes earlier.

Area forecast discussion, Jul 14, 2:09 PM EDT, 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
209 PM EDT FRI JUL 14 2006

.SHORT TERM (TONIGHT THROUGH SATURDAY)...
THUNDERSTORMS INITIATED BY SURFACE HEATING IN THE PLATEAU WILL MOVE
EAST INTO THE VALLEY THROUGH THE EVENING. A FEW OF THE STORMS
COULD BECOME STRONG ENOUGH TO PRODUCE ISOLATED WIND DAMAGE. BEST
INSTABILITY IN LAPS MESOANALYSIS APPEARS TO BE IN THE SOUTHERN AND
CENTRAL VALLEY WHERE CAPES ARE OVER 2500 J/KG. WITH LITTLE UPPER
LEVEL SUPPORT...THE STORMS WILL LIKELY DISSIPATE BY MIDNIGHT. POPS
INCREASE AGAIN TOMORROW MORNING AS A TROUGH AXIS NOW CROSSING THE
MID MISSISSIPPI RIVER VALLEY WILL APPROACH THE AREA. THE MODELS
HAVE COME INTO BETTER AGREEMENT WITH THE TIMING OF THE VORT AXIS
AND BEST LIFT...BRINGING IT INTO OUR NORTHWESTERN COUNTIES AROUND
12Z AND EXITING TO THE SOUTHEAST AROUND 21Z. WILL HAVE HIGH CHANCE
POPS IN THIS TIME FRAME. THE LIFT DOES NOT APPEAR TO BE VERY STRONG
DUE TO THE LACK OF LOW LEVEL FORCING...SURFACE WINDS ARE WESTERLY
AND DIFFLUENT. TIMING OF THE TROUGH PASSAGE IN THE MORNING/EARLY
AFTERNOON WILL ALSO NOT BE IDEAL FOR MAXIMIZING INSTABILITY...SO
THE POTENTIAL FOR WIDESPREAD SEVERE WEATHER LOOKS LOW.

.LONG TERM (SATURDAY NIGHT THROUGH FRIDAY)...
UPPER TROUGH AXIS IS THROUGH THE AREA BY 00Z SUNDAY AND MUCH DRIER
AIR ALOFT MOVES IN QUICKLY...SO POPS WILL BE REMOVED FROM SATURDAY
NIGHT EXCEPT FOR A SLIGHT CHANCE IN THE EVENING IN THE MOUNTAINS. ON
SUNDAY A LARGE AREA OF HIGH PRESSURE WILL MOVE SLOWLY FROM THE
PLAINS TO THE ATLANTIC COAST THROUGH THE PERIOD. THE 500 MB CENTER
OF THE HIGH WILL SLOWLY DRIFT TO THE EAST AND BE OVER OUR AREA ON
THURSDAY. SUBSIDENCE UNDER THE RIDGE WILL PROMOTE A DRY AND STABLE
ATMOSPHERE. THUS WILL HAVE A PERSISTENCE FORECAST OF DRY CONDITIONS
WITH ABOVE NORMAL TEMPERATURES FOR SUNDAY THROUGH THURSDAY. HIGH
TEMPS SHOULD EASILY REACH THE MID 90S IN THE VALLEY. ON FRIDAY THE
UPPER RIDGE MOVES OFFSHORE...ALLOWING SOME MOISTURE ADVECTION AND
SLIGHT DESTABILIZATION. WILL HAVE A SLIGHT CHANCE POP FRIDAY
AFTERNOON WITH SLIGHTLY COOLER TEMPS.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             73 92 71 93 / 40 50 10 0
KNOXVILLE MCGHEE TYSON AIRPORT, TN  72 89 69 93 / 40 50 10 0
OAK RIDGE, TN                       72 89 69 92 / 40 50 10 0
TRI CITIES AIRPORT, TN              69 87 65 89 / 40 50 10 0

&&

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

MJB/DGS

In the hours before

Local storm report, Jul 14, 12:05 PM EDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1205 PM EDT FRI JUL 14 2006

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

0100 PM     TSTM WND DMG     7 W MAYNARDVILLE        36.25N 83.93W
07/13/2006                   UNION              TN   DEPT OF HIGHWAYS

            SEVERAL TREES AND LARGE LIMBS DOWNED ONTO ROADWAYS IN AND
            NEAR BIG RIDGE STATE PARK. REPORTED BY THE UNION COUNTY
            HIGHWAY DEPARTMENT.

0355 PM     TSTM WND DMG     2 S MURPHY              35.06N 84.03W
07/13/2006                   CHEROKEE           NC   UTILITY COMPANY

            FROM 355 TO 410 PM EDT...SEVERAL TREES AND POWERLINES
            DOWN ACROSS THE SOUTHERN THIRD OF THE COUNTY. REPORTED BY
            BLUE RIDGE MOUNTAIN ELECTRIC.

0756 PM     TSTM WND DMG     CHATTANOOGA             35.07N 85.26W
07/13/2006                   HAMILTON           TN   UTILITY COMPANY

            FROM 756 TO 825 PM EDT...NUMEROUS TREES AND POWERLINES
            DOWN ACROSS THE SOUTHEASTERN THIRD OF THE
            COUNTY...ESPECIALLY AROUND EAST RIDGE...EAST
            BRAINERD...COLLEGEDALE...OOLTEWAH AND APISON. REPORTED BY
            THE ELECTRIC POWER BOARD.

0810 PM     TSTM WND DMG     SHARPS CHAPEL           36.34N 83.81W
07/13/2006                   UNION              TN   UTILITY COMPANY

            FROM 810 TO 820 PM EDT...SEVERAL TREES AND POWERLINES
            DOWN ACROSS THE NORTHERN HALF OF THE COUNTY. REPORTED BY
            POWELL VALLEY ELECTRIC.

0815 PM     TSTM WND DMG     5 NE MAYNARDVILLE       36.30N 83.74W
07/13/2006                   UNION              TN   LAW ENFORCEMENT

            ONE TREE DOWN ON HIGHWAY 33 AT MCLEMORE LANE AND ONE TREE
            DOWN JUST OFF HIGHWAY 33 ON HICKORY VALLEY ROAD. REPORTED
            BY DISPATCH.

&&

FERRELL

Local storm report, Jul 14, 12:07 PM EDT, 2 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MORRISTOWN TN
1207 PM EDT FRI JUL 14 2006

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

0100 PM     TSTM WND DMG     7 W MAYNARDVILLE        36.25N 83.93W
07/13/2006                   UNION              TN   DEPT OF HIGHWAYS

            SEVERAL TREES AND LARGE LIMBS DOWNED ONTO ROADWAYS IN AND
            NEAR BIG RIDGE STATE PARK. REPORTED BY THE UNION COUNTY
            HIGHWAY DEPARTMENT.

0110 PM     TSTM WND DMG     9 W MORRISTOWN          36.21N 83.46W
07/13/2006                   GRAINGER           TN   LAW ENFORCEMENT

            NUMEROUS TREES DOWN ALONG NORTHSHORE DRIVE. REPORTED BY
            GRAINGER SHERIFFS OFFICE.

0355 PM     TSTM WND DMG     2 S MURPHY              35.06N 84.03W
07/13/2006                   CHEROKEE           NC   UTILITY COMPANY

            FROM 355 TO 410 PM EDT...SEVERAL TREES AND POWERLINES
            DOWN ACROSS THE SOUTHERN THIRD OF THE COUNTY. REPORTED BY
            BLUE RIDGE MOUNTAIN ELECTRIC.

0756 PM     TSTM WND DMG     CHATTANOOGA             35.07N 85.26W
07/13/2006                   HAMILTON           TN   UTILITY COMPANY

            FROM 756 TO 825 PM EDT...NUMEROUS TREES AND POWERLINES
            DOWN ACROSS THE SOUTHEASTERN THIRD OF THE
            COUNTY...ESPECIALLY AROUND EAST RIDGE...EAST
            BRAINERD...COLLEGEDALE...OOLTEWAH AND APISON. REPORTED BY
            THE ELECTRIC POWER BOARD.

0810 PM     TSTM WND DMG     SHARPS CHAPEL           36.34N 83.81W
07/13/2006                   UNION              TN   UTILITY COMPANY

            FROM 810 TO 820 PM EDT...SEVERAL TREES AND POWERLINES
            DOWN ACROSS THE NORTHERN HALF OF THE COUNTY. REPORTED BY
            POWELL VALLEY ELECTRIC.

0815 PM     TSTM WND DMG     5 NE MAYNARDVILLE       36.30N 83.74W
07/13/2006                   UNION              TN   LAW ENFORCEMENT

            ONE TREE DOWN ON HIGHWAY 33 AT MCLEMORE LANE AND ONE TREE
            DOWN JUST OFF HIGHWAY 33 ON HICKORY VALLEY ROAD. REPORTED
            BY DISPATCH.

&&

FERRELL

Special weather statement, Jul 14, 1:39 PM EDT, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
139 PM EDT FRI JUL 14 2006

TNZ035-036-141830-
ANDERSON-MORGAN-
139 PM EDT FRI JUL 14 2006

...A STRONG THUNDERSTORM WAS AFFECTING ANDERSON AND MORGAN
COUNTIES...

AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR OLIVER SPRINGS....MOVING EAST AT 15 MPH.

SMALL HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS STORM.

SUSTAINED WINDS OR GUSTS UP TO 40 TO 50 MPH...HAIL OF PEA TO LESS
THAN PENNY SIZE...AND FREQUENT CLOUD TO GROUND LIGHTNING WILL BE
POSSIBLE WITH THESE THUNDERSTORMS. ANY FURTHER STRENGTHENING OF THESE
STORMS MAY REQUIRE ISSUANCE OF A WARNING.

MJB

Special weather statement, Jul 14, 2:17 PM EDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
217 PM EDT FRI JUL 14 2006

TNZ083-084-099-141915-
HAMILTON-MEIGS-RHEA-
217 PM EDT FRI JUL 14 2006

...STRONG THUNDERSTORMS WERE AFFECTING HAMILTON...MEIGS AND RHEA
COUNTIES...

AT 212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM DAYTON TO 7 MILES
EAST OF SODDY-DAISY....MOVING SOUTH AT 15 MPH.

SMALL HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THESE STORMS.

SUSTAINED WINDS OR GUSTS UP TO 40 TO 50 MPH...HAIL OF PEA TO LESS
THAN PENNY SIZE...AND FREQUENT CLOUD TO GROUND LIGHTNING WILL BE
POSSIBLE WITH THESE THUNDERSTORMS. ANY FURTHER STRENGTHENING OF THESE
STORMS MAY REQUIRE ISSUANCE OF A WARNING.

MJB

Local storm report, Jul 14, 2:20 PM EDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
220 PM EDT FRI JUL 14 2006

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

0200 PM     TSTM WND DMG     PETROS                  36.09N 84.45W
07/14/2006                   MORGAN             TN   LAW ENFORCEMENT

            ONE TREE DOWN ON HIGHWAY 116 NEAR PETROS. REPORTED BY
            DISPATCH.

&&

GRC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:42 PM EDT	Severe Thunderstorm Warning	MRX	Morgan	33 min
Jul 14, 3:04 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	26 min
Jul 14, 3:44 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	31 min
Jul 14, 4:07 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	38 min
Jul 14, 4:22 PM EDT	Severe Thunderstorm Warning	MRX	Greene	38 min
Jul 14, 4:52 PM EDT	Severe Thunderstorm Warning	MRX	Polk	23 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2006 Every 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.