Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 43, NWS Nashville, TN

March 13, 2006Cumberland County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 13, 2006, 8:48 PM CST for Cumberland County, Tennessee. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 13, 2006, 8:48 PM CST (02:48 UTC)
Expired: Mar 13, 2006, 9:08 PM CST
In force: 20 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

County Cumberland County, TN

The radar

The Knoxville radar (KMRX), 132 km from the middle of the area, began a volume at 02:49 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.8 hours before the alert went out and 164 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: 935 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 613 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOHX 140248
SVROHX
TNC035-140315-
/O.NEW.KOHX.SV.W.0043.060314T0248Z-060314T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
848 PM CST MON MAR 13 2006

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CUMBERLAND COUNTY IN TENNESSEE

* UNTIL 915 PM CST

* AT 845 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED OVER EXTREME SOUTH CENTRAL
  CUMBERLAND COUNTY...OR ABOUT 12 MILES SOUTH OF CROSSVILLE...AND
  MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL SOUTHEASTERN CUMBERLAND COUNTY AT 900 PM CST

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 3585 8510 3567 8505 3578 8438 3600 8444

$$

13

1 follow-up statement

000 
WWUS54 KOHX 140308
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
907 PM CST MON MAR 13 2006

TNC035-140317-
/O.CAN.KOHX.SV.W.0043.000000T0000Z-060314T0315Z/
CUMBERLAND TN-
907 PM CST MON MAR 13 2006

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUMBERLAND COUNTY
IS CANCELLED...

THE THUNDERSTORMS HAVE WEAKENED AND ARE MOVING OUT OF THE AREA.

LAT...LON 3585 8510 3567 8505 3578 8438 3600 8444

$$

13

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 Mar 13, 3:00 PM CST, 5 hours 48 minutes earlier.

Area forecast discussion, Mar 13, 3:00 PM CST, 5 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
300 PM CST MON MAR 13 2006

.DISCUSSION...
LATEST ANALYSIS SHOWING COLD FRONT MOVING ACROSS WEST TN/KY...WITH
VERY SHARP DEWPOINT GRADIENT BEHIND. ALOFT...FLOW FAIRLY FLAT AS
TROF VERY BROAD. AIRMASS OVER MIDDLE TN HAS GOOD LL SHEAR WITH ML
CAPES NEAR 1000 J/KG. ML CAP ON MORNING SOUNDING AT OR ABOVE
BREAKING POINT. GOOD ML JET STREAK BEGINNING TO PUNCH INTO THE AREA
INCREASING SPEED SHEAR AFFECTS...WHICH WILL INCREASE CHANCE FOR
DAMAGING WINDS. DESPITE BL/LL SHEAR WEAKENING...DEVELOPMENT OF
ISOLATED TORNADOES/SPIN-UPS FAVORABLE UNTIL FRONTAL PASSAGE...
ESPECIALLY EAST OF BNA. COLD FRONT LOOKING TO MOVE INTO MIDDLE TN
SHORTLY AND MOVE OFF THE PLATEAU AROUND 03Z OR SO.

AIRMASS MOVING IN BEHIND THE FRONT OVERNIGHT SETTING STAGE FOR DRY
AND COOLER WEATHER THE NEXT FEW DAYS. WEAK SYSTEM PASSING TO THE
SOUTH ON THURSDAY MAY BRING A FEW SHOWERS TO THE AREA...BUT NEXT
GOOD CHANCE LOOKS TO BE THIS WEEKEND.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE    40  56  34  62 /  60   0   0  10
CLARKSVILLE  37  55  32  63 /  30   0   0  10
CROSSVILLE   38  51  29  57 /  80   0   0  10

&&

.OHX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

07

In the hours before

Local storm report, Mar 13, 4:57 PM CST, 3 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
457 PM CST MON MAR 13 2006

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

0420 PM     TSTM WND DMG     12 S LEWISBURG          35.27N 86.79W
03/13/2006                   MARSHALL           TN   LAW ENFORCEMENT

            REPORT OF TREES DOWN

&&

MD/LK

Special weather statement, Mar 13, 5:32 PM CST, 3 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
532 PM CST MON MAR 13 2006

TNZ079-140000-
GRUNDY-
532 PM CST MON MAR 13 2006

...STRONG THUNDERSTORMS MOVING INTO GRUNDY COUNTY...

AT 530 PM...RADAR INDICATED STRONG THUNDERSTORMS MOVING TO THE
EAST AT AROUND 45 MPH. THESE STORMS WILL BE MOVING INTO
ROUGHLY THE NORTHERN HALF OF GRUNDY COUNTY THROUGH 6 PM. WIND
GUSTS TO 45 MPH AND SMALL HAIL WILL BE POSSIBLE. THESE STORMS HAVE
A HISTORY OF SMALL HAIL AND IN ADDITION...A FUNNEL CLOUD WAS
REPORTED IN COFFEE COUNTY WITH THESE STORMS. AREAS ALONG AND TO THE
NORTH OF ALTAMONT SHOULD REMAIN ALERT IN THE EVENT THAT A WARNING IS
ISSUED.

21

Local storm report, Mar 13, 5:56 PM CST, 2 hours 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
556 PM CST MON MAR 13 2006

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

0515 PM     TSTM WND GST     6 SW ALLARDT            36.32N 84.96W
03/13/2006  E60 MPH          FENTRESS           TN   TRAINED SPOTTER

            LARGE BRANCHES DOWN

&&

MD/LK

Local storm report, Mar 13, 6:33 PM CST, 2 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
633 PM CST MON MAR 13 2006

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

0622 PM     TSTM WND DMG     7 N WOODBURY            35.93N 86.07W
03/13/2006                   CANNON             TN   LAW ENFORCEMENT

            TREES DOWN ON HWY 53 NORTH

&&

MD

Special weather statement, Mar 13, 7:01 PM CST, 1 hour 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
701 PM CST MON MAR 13 2006

TNZ066-140130-
CUMBERLAND-
701 PM CST MON MAR 13 2006

...STRONG THUNDERSTORMS WERE MOVING ACROSS CUMBERLAND COUNTY...

AROUND 700 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING SOME STRONG THUNDERSTORMS...WITH THE STRONGEST STORM ON THE
WHITE AND CUMBERLAND COUNTY LINE WEST OF CROSSVILLE. THE STORMS WERE
MOVING EAST AT 50 MPH.

THE STRONGEST STORM WILL BE NEAR...
  CROSSVILLE BY 710 PM CST.
  FAIRFIELD GLADE BY 715 PM CST.

PEOPLE IN CUMBERLAND COUNTY...INCLUDING THE CITIES OF CROSSVILLE AND
FAIRFIELD GLADE...SHOULD MONITOR THE WEATHER SITUATION CLOSELY.
LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE
ACTION SHOULD SEVERE WEATHER THREATEN.

SMALL HAIL ALONG WITH WIND GUSTS FROM 40 TO 50 MPH ARE EXPECTED...AS
WELL AS DANGEROUS LIGHTNING.

STEIGERWALDT

Local storm report, Mar 13, 8:06 PM CST, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
806 PM CST MON MAR 13 2006

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

0720 PM     TSTM WND DMG     CROSSVILLE              35.95N 85.04W
03/13/2006                   CUMBERLAND         TN   EMERGENCY MNGR

            POWER POLE AND LINES DOWN

&&

SH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 6:22 PM CST	Tornado Warning	OHX	Cannon, Coffee	15 min
Mar 13, 6:29 PM CST	Severe Thunderstorm Warning	OHX	White	31 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.