Alert archive / Tennessee / Tornado Warnings in 2013

Tornado Warning 42, NWS Nashville, TN

December 21, 20135 counties in Tennessee

NWS Nashville, TN issued this tornado warning at Dec 21, 2013, 8:51 PM CST for 5 counties in Tennessee. It was in force for 24 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 21, 2013, 8:51 PM CST (02:51 UTC)
Expired: Dec 21, 2013, 9:15 PM CST
In force: 24 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cheatham County, TN, Davidson County, TN, Dickson County, TN, Sumner County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 25 km from the middle of the area, began a volume at 02:53 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.

What was reported inside it

Time	Report	Where	Remark
Dec 21, 9:02 PM CST	TSTM WND DMG	Joelton, TN	LARGE TREE DOWN AT THE CORNER OF UNION HILL RD AND WHITES CREEK PK.
Dec 21, 9:13 PM CST	TSTM WND DMG	9 Ssw Nashville, TN	REPORTS OF POWER OUTAGES IN BELLEVUE
Dec 21, 9:13 PM CST	TSTM WND DMG	Nashville, TN	MULITPLE REPORTS OF TREES DOWN ACROSS THE COUNTY.
Dec 21, 9:15 PM CST	TSTM WND DMG	Nashville, TN	BRICK WALL BLOWN OUT OF BUILDING BLOCKING THE ROAD ON WHITES CREEK PIKE AND DICKERSON ROAD
Dec 21, 9:23 PM CST	TSTM WND DMG	2 Se Nashville, TN	WALL OF UNFINISHED BUILDING COLLAPSED AND SHINGLES BLOWN OFF A HOME AT CORNER OF LINDSLEY AND ACADEMY PLACE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 21, 5:46 PM CST	Tornado Watch	SPC	6 hr
Dec 21, 8:16 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.9 hours before the alert went out and 24 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: 417 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 587 m²/s²
0-3 km storm-relative helicity: 694 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

009 
WFUS54 KOHX 220251
TOROHX
TNC021-037-043-165-187-220315-
/O.NEW.KOHX.TO.W.0042.131222T0251Z-131222T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
851 PM CST SAT DEC 21 2013

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  CHEATHAM COUNTY IN MIDDLE TENNESSEE...
  DAVIDSON COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL DICKSON COUNTY IN MIDDLE TENNESSEE...
  SOUTHWESTERN SUMNER COUNTY IN MIDDLE TENNESSEE...
  NORTHWESTERN WILLIAMSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 915 PM CST

* AT 848 PM CST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  MULTIPLE TORNADOES WAS LOCATED ALONG A LINE EXTENDING FROM ASHLAND
  CITY TO 5 MILES SOUTHEAST OF BURNS. TORNADOES MAY FORM RAPIDLY
  ANYWHERE IN THIS LINE OF STORMS. THE LINE OF STORMS WAS MOVING EAST
  AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NASHVILLE...KINGSTON SPRINGS...PEGRAM...JOELTON...BELLEVUE...BELLE
  MEADE...GOODLETTSVILLE...FOREST HILLS...MADISON...OAK HILL...OLD
  HICKORY AND LAKEWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3603 8668 3600 8726 3636 8710 3637 8684
      3635 8682 3637 8678 3637 8654
TIME...MOT...LOC 0251Z 257DEG 48KT 3634 8701 3602 8718

$$

ROSE

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Dec 21, 7:15 PM CST, 1 hour 36 minutes earlier.

Area forecast discussion, Dec 21, 7:15 PM CST, 1 hour 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
715 PM CST SAT DEC 21 2013

.MESOSCALE UPDATE...

...TORNADO WATCH STILL IN EFFECT FOR WESTERN MIDDLE TN...

LINE OF STRONG TO SEVERE STORMS ACROSS WRN KY/TN/MS IS QUICKLY
MOVING TO THE EAST NOW. LATEST LAPS DATA SHOWING LI'S ANYWHERE
FROM 0 TO -2C ACROSS THE MID STATE...WITH THE LATEST OHX SOUNDING
SHOWING A THIN CAP. WE HAVE BEEN WARMING SINCE THOUGH SO CAP WILL
LIKELY NOT HOLD. SHEAR IS QUITE INCREDIBLE WITH 50 KTS AROUND 2KFT
AND 70 KTS AROUND 5KFT. WITH OUR SFC WINDS BACKING...STORM
RELATIVE HELICITIES FROM 0-3KM ARE ANYWHERE FROM 700 TO OVER
900...WAY OFF THE CHART. GIVEN UPSTREAM WARNINGS AND
REPORTS...WOULD EXPECT ANY STRONG STORM TO PRODUCE WIND GUSTS OVER
60 MPH RELATIVELY EASILY BUT THE BIGGEST THREAT WILL BE WHERE
REFLECTIVITY GRADIENTS ARE THE STRONGEST/TIGHTEST ALONG THE
LEADING EDGE. WE WILL JUST HAVE TO WATCH THE NORTHERN EDGE OF ANY
BOWING SEGMENTS WITHIN THE SQUALL LINE WHERE TORNADIC ACTIVITY
WILL BE MOST LIKELY. THUS...THE THREAT FOR SEVERE WEATHER/ISOLATED
TORNADIC ACTIVITY HAS NOT DIMINISHED GIVEN THE LOCAL ENVIRONMENT.

TIMING THE LEADING EDGE OUT THIS FAR...LOOKS LIKE ROUGHLY A 9PM
ARRIVAL TIME AROUND THE NASHVILLE METRO AREA.

&&

.PREV DISCUSSION... /ISSUED 532 PM CST SAT DEC 21 2013/

UPDATE...ADDED AVIATION SECTION FOR 00Z TAF'S.

AVIATION...BNA/CKV/CSV...LINE OF CONVECTION WILL MOVE ACROSS
MIDDLE TENNESSEE THIS EVENING AND INTO THE OVERNIGHT PERIOD AS A
STRONG COLD FRONT PUSHES THROUGH THE REGION. SURFACE WINDS WILL
REMAIN STRONG THROUGH THE NIGHT WITH STRONG LLWS OWING TO A 60-KT
LOW-LEVEL JET. LOOK FOR LOW CIGS TO PERSIST UNTIL SUNDAY MORNING
BEFORE DRIER AIR MOVES IN.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY UNTIL 4 AM CST SUNDAY FOR TNZ005>011-022>034-
056>066-075-077>080-093>095.

&&

AL

Hazardous weather outlook, Dec 21, 8:33 PM CST, 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
833 PM CST SAT DEC 21 2013

TNZ005>007-022>027-056>060-093>095-221030-
STEWART-MONTGOMERY-ROBERTSON-BENTON-HOUSTON-HUMPHREYS-DICKSON-
CHEATHAM-DAVIDSON-PERRY-HICKMAN-LEWIS-WILLIAMSON-MAURY-WAYNE-
LAWRENCE-GILES-
833 PM CST SAT DEC 21 2013

...TORNADO WATCH IN EFFECT UNTIL MIDNIGHT...
...WIND ADVISORY IN EFFECT UNTIL 4 AM CST SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...THIS EVENING AND OVERNIGHT.

THERE IS A MODERATE RISK OF SEVERE STORMS ACROSS ALL OF MIDDLE
TENNESSEE THROUGH TONIGHT. A LINE OF STRONG TO SEVERE STORMS
WILL CONTINUE MOVING ACROSS THE MID STATE THROUGH THE EARLY
MORNING HOURS. ISOLATED TORNADOES ARE EXPECTED WITH THIS LINE...
ALONG WITH DAMAGING STRAIGHT LINE WINDS. WIND DAMAGE HAS ALREADY
BEEN REPORTED IN THE MID STATE TONIGHT...AND MORE ISOLATED CASES
OF WIND DAMAGE ARE EXPECTED THROUGH MIDNIGHT.

IN ADDITION...STRONG GRADIENT WINDS OF AROUND 40 MPH AHEAD OF THE
LINE WILL BE POSSIBLE. THUS...A WIND ADVISORY IS IN EFFECT THROUGH
THE OVERNIGHT HOURS.

MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR
BY LISTENING TO NOAA WEATHER RADIO.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS WILL BE NEEDED.

TNZ008>011-028>034-061>066-075-077>080-221030-
SUMNER-MACON-CLAY-PICKETT-WILSON-TROUSDALE-SMITH-JACKSON-PUTNAM-
OVERTON-FENTRESS-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-
833 PM CST SAT DEC 21 2013

...TORNADO WATCH IN EFFECT UNTIL 2 AM CST SUNDAY...
...WIND ADVISORY IN EFFECT UNTIL 4 AM CST SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...THIS EVENING AND OVERNIGHT.

THERE IS A MODERATE RISK OF SEVERE STORMS ACROSS ALL OF MIDDLE
TENNESSEE THROUGH TONIGHT. A LINE OF STRONG TO SEVERE STORMS
WILL CONTINUE MOVING ACROSS THE MID STATE THROUGH THE EARLY
MORNING HOURS. ISOLATED TORNADOES ARE EXPECTED WITH THIS LINE...
ALONG WITH DAMAGING STRAIGHT LINE WINDS. WIND DAMAGE HAS ALREADY
BEEN REPORTED IN THE MID STATE TONIGHT...AND MORE ISOLATED CASES
OF WIND DAMAGE ARE EXPECTED THROUGH EARLY SUNDAY MORNING...AS THE
LINE OF STORMS CONTINUES TO MOVE TO THE EAST.

IN ADDITION...STRONG GRADIENT WINDS OF AROUND 40 MPH AHEAD OF THE
LINE WILL BE POSSIBLE. THUS...A WIND ADVISORY IS IN EFFECT THROUGH
THE OVERNIGHT HOURS.

MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR
BY LISTENING TO NOAA WEATHER RADIO.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS WILL BE NEEDED.

SPOTTERS CAN MAKE REPORTS VIA TWITTER USING HASHTAG #TSPOTTER

TO MAKE A REPORT VIA FACEBOOK GO TO:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.NASHVILLE.GOV

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

19

In the hours before

Local storm report, Dec 21, 8:16 PM CST, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
816 PM CST SAT DEC 21 2013

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

0746 PM     TSTM WND DMG     CAMDEN                  36.06N  88.10W
12/21/2013                   BENTON             TN   EMERGENCY MNGR

            TREES DOWN ALONG BIRDSONG... DANVILLE AND LICK CREEK
            ROADS

&&

EVENT NUMBER OHX1300782

MDAVIS

Local storm report, Dec 21, 8:19 PM CST, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
819 PM CST SAT DEC 21 2013

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

0754 PM     TSTM WND DMG     DOVER                   36.48N  87.84W
12/21/2013                   STEWART            TN   EMERGENCY MNGR

            ROOF WAS BLOWN OFF OF A HOME ON FRANK EARHART ROAD IN
            DOVER.

&&

EVENT NUMBER OHX1300783

MDAVIS

Local storm report, Dec 21, 8:29 PM CST, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
829 PM CST SAT DEC 21 2013

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

0819 PM     TSTM WND GST     CLARKSVILLE             36.56N  87.35W
12/21/2013  M60 MPH          MONTGOMERY         TN   ASOS

&&

EVENT NUMBER OHX1300784

AL

Local storm report, Dec 21, 8:46 PM CST, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
846 PM CST SAT DEC 21 2013

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

0835 PM     TSTM WND DMG     5 NW BON AQUA           36.00N  87.40W
12/21/2013                   DICKSON            TN   TRAINED SPOTTER

            NUMEROUS TREES DOWN. ESTIMATED WINDS OVER 60 MPH.

&&

EVENT NUMBER OHX1300785

AL

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 21, 7:36 PM CST	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	24 min
Dec 21, 7:53 PM CST	Severe Thunderstorm Warning	OHX	Benton, Humphreys, Perry	22 min
Dec 21, 7:56 PM CST	Severe Thunderstorm Warning	OHX	Benton, Dickson, Houston, Humphreys, Montgomery, Stewart	34 min
Dec 21, 8:00 PM CST	Tornado Warning	OHX	Benton, Houston, Humphreys, Montgomery, Stewart	30 min
Dec 21, 8:09 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys, Lewis, Perry, Wayne	36 min
Dec 21, 8:18 PM CST	Severe Thunderstorm Warning	OHX	Wayne	42 min
Dec 21, 8:21 PM CST	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	39 min
Dec 21, 8:24 PM CST	Tornado Warning	OHX	Cheatham, Dickson, Humphreys, Montgomery	36 min
Dec 21, 8:39 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Lawrence, Lewis, Maury and 3 more	36 min
Dec 21, 8:42 PM CST	Tornado Warning	OHX	Dickson, Hickman, Williamson	33 min
Dec 21, 8:53 PM CST	Tornado Warning	OHX	Robertson, Sumner	37 min
Dec 21, 9:05 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Hickman, Lawrence, Lewis, Maury, Wayne and 1 more	40 min
Dec 21, 9:13 PM CST	Tornado Warning	OHX	Davidson, Sumner, Wilson	32 min
Dec 21, 9:15 PM CST	Special Weather Statement	OHX	Lawrence, Wayne	45 min
Dec 21, 9:21 PM CST	Tornado Warning	OHX	Macon, Sumner, Trousdale	39 min
Dec 21, 9:37 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Davidson, Giles, Lawrence, Marshall, Maury and 3 more	38 min
Dec 21, 9:38 PM CST	Tornado Warning	OHX	Davidson, Sumner, Trousdale, Wilson	22 min
Dec 21, 9:53 PM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith, Trousdale	37 min
Dec 21, 9:56 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Trousdale, Wilson	49 min
Dec 21, 10:09 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, DeKalb, Giles, Lawrence, Marshall and 3 more	36 min
Dec 21, 10:09 PM CST	Tornado Warning	OHX	Smith, Wilson	36 min
Dec 21, 10:12 PM CST	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	33 min
Dec 21, 10:18 PM CST	Tornado Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	27 min
Dec 21, 10:30 PM CST	Tornado Warning	OHX	Clay, Jackson, Smith	30 min
Dec 21, 10:34 PM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton, Pickett	26 min
Dec 21, 10:42 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, DeKalb, Giles, Lawrence, Marshall and 2 more	48 min
Dec 21, 10:44 PM CST	Severe Thunderstorm Warning	OHX	Jackson, Overton, Pickett, Putnam, Smith	31 min
Dec 21, 10:59 PM CST	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	31 min
Dec 21, 11:02 PM CST	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, DeKalb, Putnam, Rutherford and 2 more	43 min
Dec 21, 11:16 PM CST	Severe Thunderstorm Warning	OHX	Fentress, Overton, Pickett, Putnam	59 min
Dec 21, 11:36 PM CST	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Fentress, Overton, Putnam, Van Buren and 2 more	39 min
Dec 21, 11:44 PM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	46 min
Dec 22, 12:13 AM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Putnam, Van Buren, White	47 min
Dec 22, 12:16 AM CST	Severe Thunderstorm Warning	OHX	Fentress	14 min
Dec 22, 12:29 AM CST	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	31 min
Dec 22, 1:59 PM CST	River Flood Advisory	OHX	Grundy	10 hr

Nearby

Tornado Warnings in Tennessee, 2013 Every tornado warning in 2013 Tornadoes in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.