Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 126, NWS Nashville, TN

November 14, 2007Davidson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Nov 14, 2007, 1:20 PM CST for Davidson County, Tennessee. It was in force for 25 min. 3 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: Nov 14, 2007, 1:20 PM CST (19:20 UTC)
Expired: Nov 14, 2007, 1:45 PM CST
In force: 25 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Davidson County, TN

The radar

The Nashville radar (KOHX), 21 km from the middle of the area, began a volume at 19:21 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, 1:30 PM CST	HAIL 0.88	Nashville, TN	REPORTED IN DOWNTOWN NASHVILLE
Nov 14, 1:34 PM CST	HAIL 0.75	Nashville, TN	DOWNTOWN NASHVILLE
Nov 14, 1:50 PM CST	HAIL 1.25	11 Se Nashville, 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, 7.3 hours before the alert went out and 14 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 141919
SVROHX
TNC037-141945-
/O.NEW.KOHX.SV.W.0126.071114T1920Z-071114T1945Z/

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIDSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF NASHVILLE...

* UNTIL 145 PM CST

* AT 117 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR BELLE MEADE...OR ABOUT 7 MILES SOUTHWEST OF
  NASHVILLE...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OAK HILL BY 125 PM CST...
  NASHVILLE BY 130 PM CST...
  LAKEWOOD BY 145 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 3623 8658 3615 8655 3614 8651 3607 8652
      3604 8682 3605 8694 3603 8697 3617 8700
      3618 8698 3621 8697 3630 8666
TIME...MOT...LOC 1920Z 260DEG 32KT 3613 8687

$$

ROSE

1 follow-up statement

000 
WWUS54 KOHX 141939
SVSOHX

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

TNC037-141947-
/O.EXP.KOHX.SV.W.0126.000000T0000Z-071114T1945Z/
DAVIDSON TN-
137 PM CST WED NOV 14 2007

...THE SEVERE THUNDERSTORM WARNING FOR DAVIDSON COUNTY EXPIRES AT 145
PM CST...

AT 134 PM, THE SEVERE THUNDERSTORM WAS LOCATED NEAR THE NASHVILLE 
INTERNATIONAL AIRPORT, MOVING EAST AT 35 MPH. THIS STORM HAS 
PRODUCED AS LARGE AS ONE INCH IN DIAMETER.

LAT...LON 3623 8658 3615 8655 3614 8651 3607 8652
      3604 8682 3605 8694 3603 8697 3617 8700
      3618 8698 3621 8697 3630 8666
TIME...MOT...LOC 1937Z 260DEG 32KT 3616 8669

$$

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, 2 hours 48 minutes earlier.

Area forecast discussion, Nov 14, 10:32 AM CST, 2 hours 48 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 23 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 14, 1:27 PM CST	Severe Thunderstorm Warning	OHX	Hickman, Perry	33 min
Nov 14, 1:52 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Wilson	23 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.