Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 128, NWS Nashville, TN

November 14, 2007Davidson County, Wilson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Nov 14, 2007, 1:52 PM CST for Davidson County, Wilson County, Tennessee. It was in force for 23 min. 1 report 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: Nov 14, 2007, 1:52 PM CST (19:52 UTC)
Expired: Nov 14, 2007, 2:15 PM CST
In force: 23 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 23 km from the middle of the area, began a volume at 19:55 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
Nov 14, 2:10 PM CST	HAIL 0.75	3 Sw Mount Juliet, TN

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 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 12:00Z, 7.9 hours before the alert went out and 18 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: 143 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 141952
SVROHX
TNC037-189-142015-
/O.NEW.KOHX.SV.W.0128.071114T1952Z-071114T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
152 PM CST WED NOV 14 2007

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DAVIDSON COUNTY IN TENNESSEE...
  CENTRAL WILSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF LEBANON...

* UNTIL 215 PM CST

* AT 151 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR RURAL HILL...OR ABOUT
  11 MILES EAST OF NASHVILLE...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL HILL...BELINDA CITY AND 6 MILES SOUTH OF MOUNT JULIET BY 200
  PM CST...
  6 MILES SOUTH OF LEBANON BY 215 PM CST...

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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 3602 8611 3603 8638 3610 8650 3607 8651
      3603 8658 3603 8668 3621 8669 3625 8612
TIME...MOT...LOC 1952Z 268DEG 31KT 3612 8658

$$

ROSE

1 follow-up statement

000 
WWUS54 KOHX 142006
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
206 PM CST WED NOV 14 2007

TNC037-189-142015-
/O.CON.KOHX.SV.W.0128.000000T0000Z-071114T2015Z/
DAVIDSON TN-WILSON TN-
206 PM CST WED NOV 14 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CST
FOR CENTRAL WILSON AND SOUTHEASTERN DAVIDSON COUNTIES...

AT 204 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR RURAL HILL...
OR ABOUT 9 MILES SOUTHWEST OF LEBANON...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES SOUTH OF LEBANON BY 215 PM CST...

LAT...LON 3602 8611 3603 8638 3610 8650 3607 8651
      3603 8658 3603 8668 3621 8669 3625 8612
TIME...MOT...LOC 2006Z 268DEG 31KT 3612 8643

$$

ROSE

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 Nov 14, 10:32 AM CST, 3 hours 20 minutes earlier.

Area forecast discussion, Nov 14, 10:32 AM CST, 3 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1032 AM CST WED NOV 14 2007

.DISCUSSION..
AIRMASS REMAINS BALMY ACROSS THE MID-STATE THIS MORNING. APPROACHING
COLD FRONT NOW JUST NORTH OF EVV TO NEAR THE MO BOOTHEEL. INFLUX
OF DEEPER MOISTURE...WEAK INSTABILITY...AND LL CONVERGENCE
CONTINUES AHEAD OF BOUNDARY...WITH SCATTERED SHWRS/TSTMS BREAKING
OUT ACROSS WEST AND WEST-MIDDLE TN.

THIS TREND EXPECTED TO CONTINUE INTO THE EARLY EVENING AS THE
FRONT PUSHES TO AND ACROSS THE AREA. MOST LOCATIONS ARE UNDER
SLIGHT RISK THUS AS STORMS BECOME MORE WIDESPREAD LATER TODAY...
A FEW MAY REACH SEVER LIMITS. EXPECT TEMPS TO REACH FORECASTED
HIGHS THUS NO CHANGES AT THIS TIME.

&&

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

&&

07

Hazardous weather outlook, Nov 14, 3:57 AM CST, 9 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
357 AM CST WED NOV 14 2007

TNZ005>011-022>034-056>066-075-077>080-093>095-151130-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DEKALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
357 AM CST WED NOV 14 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL DEVELOP AHEAD OF A STRONG COLD
FRONT THIS AFTERNOON AND EVENING. BRIEF HEAVY DOWNPOURS CAN BE
EXPECTED ALONG WITH SOME GUSTY WINDS. ISOLATED SEVERE STORMS WITH
DAMAGING WINDS MAY OCCUR. THE FRONT WILL MOVE THROUGH THE ENTIRE
MID STATE BY MIDNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

DUE TO THE BRIEF AND ISOLATED NATURE OF POSSIBLE SEVERE WEATHER
THREAT...SPOTTER ACTIVATION IS NOT ANTICIPATED.

13

In the hours before

Local storm report, Nov 14, 1:35 PM CST, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
135 PM CST WED NOV 14 2007

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

0130 PM     HAIL             NASHVILLE               36.17N 86.78W
11/14/2007  E0.88 INCH       DAVIDSON           TN   TRAINED SPOTTER

            REPORTED IN DOWNTOWN NASHVILLE

0119 PM     HAIL             10 SW NASHVILLE         36.07N 86.91W
11/14/2007  E0.75 INCH       DAVIDSON           TN   PUBLIC

            NEAR BELLEVUE

&&

STEIGERWALDT

Local storm report, Nov 14, 1:38 PM CST, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
138 PM CST WED NOV 14 2007

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

0134 PM     HAIL             NASHVILLE               36.17N 86.78W
11/14/2007  E0.75 INCH       DAVIDSON           TN   EMERGENCY MNGR

            DOWNTOWN NASHVILLE

&&

STEIGERWALDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 14, 1:20 PM CST	Severe Thunderstorm Warning	OHX	Davidson	25 min
Nov 14, 1:27 PM CST	Severe Thunderstorm Warning	OHX	Hickman, Perry	33 min
Nov 14, 2:27 PM CST	Severe Thunderstorm Warning	OHX	Wilson	18 min
Nov 14, 3:19 PM CST	Areal Flood Advisory	OHX	Davidson, Rutherford, Wilson	3 hr
Nov 14, 3:27 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Wilson	18 min
Nov 14, 3:45 PM CST	Areal Flood Advisory	OHX	DeKalb, Putnam, Smith	3 hr
Nov 14, 3:55 PM CST	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	20 min
Nov 14, 4:31 PM CST	Severe Thunderstorm Warning	OHX	Giles	29 min
Nov 14, 4:36 PM CST	Severe Thunderstorm Warning	OHX	White	24 min
Nov 14, 5:10 PM CST	Areal Flood Advisory	OHX	DeKalb, White	3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2007 Every severe thunderstorm warning in 2007

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.