Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 25, NWS Nashville, TN

April 3, 2007Davidson County, Williamson County, Wilson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 3, 2007, 8:57 PM CDT for Davidson County, Williamson County, Wilson County, Tennessee. It was in force for 48 min. 13 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: Apr 3, 2007, 8:57 PM CDT (01:57 UTC)
Expired: Apr 3, 2007, 9:45 PM CDT
In force: 48 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

Counties Davidson County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 20 km from the middle of the area, began a volume at 01:59 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
Apr 3, 9:00 PM CDT	HAIL 0.25	2 S Nashville, TN	NICKEL SIZE HAIL WEST END AREA.
Apr 3, 9:00 PM CDT	HAIL 0.88	2 S Nashville, TN	NICKEL SIZE HAIL WEST END AREA.
Apr 3, 9:02 PM CDT	HAIL 0.75	5 Sw Nashville, TN	PENNY SIZE HAIL BELLVIEW AREA.
Apr 3, 9:05 PM CDT	TSTM WND DMG	1 Nw Lebanon, TN	TREE DOWN ON HOUSE AT 320 MANN ROAD.
Apr 3, 9:07 PM CDT	HAIL 0.88	5 W Franklin, TN	NICKEL SIZE HAIL AND TREE DOWN OLD HILLSBORO ROAD AND WADDELL HOLLOW ROAD 5 MILES WEST OF FRANKLIN.
Apr 3, 9:10 PM CDT	HAIL 0.88	7 Se Nashville, TN	LARGE HAIL IN ANTIOCH
Apr 3, 9:15 PM CDT	HAIL 0.5	12 E Nashville, TN	HAM REPORTS DIME SIZE HAIL PERCY PRIEST LAKE AREA.
Apr 3, 9:15 PM CDT	HAIL 0.5	4 S Mount Juliet, TN	WIFE OF HAM OPERATOR REPORTS DIME SIZE HAIL.
Apr 3, 9:15 PM CDT	HAIL 0.5	5 S Mount Juliet, TN	WIFE OF HAM OPERATOR REPORTR DIME SIZE HAIL.
Apr 3, 9:20 PM CDT	TSTM WND DMG	3 S Lebanon, TN	TELCO LINE DOWN STUMPY LANE AND MURFREESBORO ROAD.
Apr 3, 9:23 PM CDT	TSTM WND DMG	1 Nw Lebanon, TN	TREE DOWN ON HOUSE 320 MANN ROAD.
Apr 3, 9:25 PM CDT	TSTM WND DMG	2 E Lebanon, TN	TREES DOWN ACROSS ROAD 1900 BLUE4BIRD ROAD.
Apr 3, 9:39 PM CDT	TSTM WND DMG	2 E Lebanon, TN	TREES DOWN ACROSS ROAD 1900 BLUEBIRD ROAD.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 5 storm reports to this severe thunderstorm warning; the first came 8 minutes after it went out.

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
Apr 3, 8:03 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.0 hours before the alert went out and 7 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: 1678 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1714 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 040158
SVROHX
TNC037-187-189-040245-
/O.NEW.KOHX.SV.W.0025.070404T0157Z-070404T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
857 PM CDT TUE APR 3 2007

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN DAVIDSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF NASHVILLE...
  WILLIAMSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF FRANKLIN...
  WESTERN WILSON COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF LEBANON...

* UNTIL 945 PM CDT

* AT 854 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM GREEN HILL TO BELLE MEADE TO 21
  MILES WEST OF FRANKLIN...AND MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  BELINDA CITY BY 905 PM CDT...
  LEBANON...RURAL HILL...FRANKLIN AND BRENTWOOD BY 910 PM CDT...
  NOLENSVILLE BY 920 PM CDT...

TREES WERE REPORTED BLOWN DOWN IN NORTHWEST DAVIDSON COUNTY AT 846 
PM CDT.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. 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 3628 8664 3611 8699 3585 8722 3577 8675
      3604 8653 3600 8626 3633 8620

$$
STEIGERWALDT

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 Apr 3, 8:30 PM CDT, 27 minutes earlier.

Area forecast discussion, Apr 3, 8:30 PM CDT, 27 minutes before

AREA FORECAST DISCUSSION...UPDATED TIMING
NATIONAL WEATHER SERVICE NASHVILLE TN
830 PM CDT TUE APR 3 2007

.DISCUSSION...
LEADING EDGE OF STRONG THUNDERSTORMS IS ALONG A LINE FROM PICKETT
COUNTY TO SRN MACON COUNTY TO NRN DAVIDSON COUNTY TO NRN PERRY
COUNTY. THIS LINE IS MOVING TOWARD THE SE AT 30 MPH. MOST REPORTS OF
SEVERE WEATHER ARE FOR DAMAGING HAIL WITH A FEW REPORTS OF
DAMAGING WIND. THERE IS ALSO A POSSIBILITY OF ISOLATED TORNADOES
DUE MAINLY TO THE STRONG SHEAR NOTED IN RECENT SOUNDINGS.

WE EXPECT THIS LINE TO CONTINUE SEWD AND MOVE OUT OF THE AREA
BY 4-5 AM.  THE SVR TSTM WATCH WAS CANCELLED FOR MONTGOMERY...STEWART
AND HOUSTON COUNTIES. WE WILL CONTINUE TO CLEAR COUNTIES IN THE
CURRENT TORNADO WATCH AS CONVECTION MAKES ITS WAY EWD.
&&

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

JLM

Hazardous weather outlook, Apr 3, 6:21 PM CDT, 2 hours 36 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
621 PM CDT TUE APR 3 2007

TNZ005>011-022>034-056>066-075-077>080-093>095-041200-
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-
621 PM CDT TUE APR 3 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

AREAS ALONG AND WEST OF INTERSTATE 65 ARE IN A MODERATE RISK FOR
SEVERE WEATHER TONIGHT. AREAS EAST OF I 65 ARE IN A SLIGHT RISK.
SEVERE THUNDERSTORMS ARE LIKELY BETWEEN 800 PM AND MIDNIGHT AHEAD
OF A VIGOROUS COLD FRONT. THE ATMOSPHERE HAS BECOME VERY
UNSTABLE...SO DAMAGING WINDS AND LARGE HAIL WILL BE LIKELY. A FEW
STORMS MAY HAVE ENOUGH ROTATION TO PRODUCE TORNADOES.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MUCH COLDER AIR WILL BE USHERED IN BEHIND THE FRONT WEDNESDAY INTO
THE WEEKEND. A FREEZE IS LIKELY...ESPECIALLY OVER THE EASTER
WEEKEND. THIS WILL BE QUITE A SHOCK TO VEGETATION AFTER THE
PROLONGED WARM SPELL.

OVERNIGHT LOW TEMPERATURES WILL DROP DOWN TO NEAR FREEZING WEDNESDAY
NIGHT THROUGH FRIDAY NIGHT. ON SATURDAY NIGHT...AS THE ARCTIC
SURFACE HIGH BUILDS IN...A KILLING FREEZE MAY OCCUR AS TEMPERATURES
MAY DROP DOWN INTO THE MID TO UPPER 20S BY EASTER MORNING.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF SPOTTER AND EMERGENCY MANAGERS WILL BE NEEDED
THROUGH THIS EVENING.

13

In the hours before

Special weather statement, Apr 3, 4:22 PM CDT, 4 hours 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
422 PM CDT TUE APR 3 2007

TNZ080-032145-
VAN BUREN-
422 PM CDT TUE APR 3 2007

...STRONG THUNDERSTORM MOVING ACROSS EXTREME EASTERN VAN BUREN
COUNTY...

A STRONG THUNDERSTORM WILL MOVE ACROSS THE EXTREME EASTERN PART OF
VAN BUREN COUNTY THROUGH 445 PM. HAIL UP TO THE SIZE OF DIMES WILL
BE POSSIBLE. WIND GUSTS UP TO 35 MPH WILL ALSO BE POSSIBLE.

21

Local storm report, Apr 3, 6:08 PM CDT, 2 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
608 PM CDT TUE APR 03 2007

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

0600 PM     HAIL             13 SE CROSSVILLE        35.82N 84.87W
04/03/2007  E0.88 INCH       CUMBERLAND         TN   UNKNOWN

            PUBLIC REPORTED THE HAIL.

&&

STEIGERWALDT

Local storm report, Apr 3, 7:46 PM CDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
746 PM CDT TUE APR 03 2007

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

0729 PM     HAIL             8 N DOVER               36.60N 87.84W
04/03/2007  E1.75 INCH       STEWART            TN   LAW ENFORCEMENT

            SHERIFFS OFFICE REPORTED GOLF BALL SIZE HAIL AT BUMPUS
            MILLS.

&&

ORCHANIAN

Local storm report, Apr 3, 8:26 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
826 PM CDT TUE APR 03 2007

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

0822 PM     HAIL             2 NW CHARLOTTE          36.21N 87.37W
04/03/2007  E0.88 INCH       DICKSON            TN   PUBLIC

&&

SHERRON

Local storm report, Apr 3, 8:35 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
835 PM CDT TUE APR 03 2007

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

0823 PM     TSTM WND DMG     N CHARLOTTE             36.18N 87.35W
04/03/2007                   DICKSON            TN   AMATEUR RADIO

            TREES DOWN WATER VALLEY AND LEACH ROAD IN CUMBERLAND
            FURNACE

0825 PM     TSTM WND DMG     5 SW CHARLOTTE          36.13N 87.41W
04/03/2007                   DICKSON            TN   AMATEUR RADIO

            TREES DOWN IN SYLVIA COMMUNITY

&&

SHERRON

Local storm report, Apr 3, 8:45 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
845 PM CDT TUE APR 03 2007

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

0842 PM     HAIL             5 S SPARTA              35.86N 85.47W
04/03/2007  E0.75 INCH       WHITE              TN   LAW ENFORCEMENT

            911 CENTER REPORTED PENNY SIZE HAIL SOUTH OF SPARTA.

&&

ORCHANIAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 7:15 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys	60 min
Apr 3, 7:45 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	30 min
Apr 3, 8:06 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Robertson	39 min
Apr 3, 8:26 PM CDT	Severe Thunderstorm Warning	OHX	Dickson	34 min
Apr 3, 8:28 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, White	32 min
Apr 3, 8:32 PM CDT	Severe Thunderstorm Warning	OHX	Perry	28 min
Apr 3, 8:41 PM CDT	Severe Thunderstorm Warning	OHX	Hickman	49 min
Apr 3, 9:00 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	45 min
Apr 3, 9:07 PM CDT	Severe Thunderstorm Warning	OHX	Maury	23 min
Apr 3, 9:12 PM CDT	Tornado Warning	OHX	Cumberland	33 min
Apr 3, 9:34 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury	26 min
Apr 3, 9:38 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford	37 min
Apr 3, 9:44 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	31 min
Apr 3, 9:55 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee	35 min
Apr 4, 2:46 AM CDT	Freeze Watch	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more	24 hr
Apr 4, 2:46 AM CDT	Freeze Warning	OHX	Bedford, Benton, Cannon, Cheatham, Clay, Coffee and 33 more	29 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.