Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 59, NWS Nashville, TN

April 10, 2009Benton County, Humphreys County, Perry County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 10, 2009, 11:06 AM CDT for Benton County, Humphreys County, Perry County, Tennessee. It was in force for 24 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: Apr 10, 2009, 11:06 AM CDT (16:06 UTC)
Expired: Apr 10, 2009, 11:30 AM CDT
In force: 24 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Benton County, TN, Humphreys County, TN, Perry County, TN

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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 10, 8:53 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 4.1 hours before the alert went out and 127 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1414 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: -4 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 101606
SVROHX
TNC005-085-135-101630-
/O.NEW.KOHX.SV.W.0059.090410T1606Z-090410T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1106 AM CDT FRI APR 10 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BENTON COUNTY IN MIDDLE TENNESSEE...
  SOUTHWESTERN HUMPHREYS COUNTY IN MIDDLE TENNESSEE...
  NORTHERN PERRY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 1130 AM CDT

* AT 1105 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED OVER NORTHEASTERN DECATUR COUNTY...OR 16 MILES
  NORTHWEST OF LINDEN...AND MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE ACROSS...
  RURAL SOUTHWESTERN HUMPHREYS COUNTY AT 1120 AM CDT
  RURAL NORTHERN PERRY COUNTY AT 1120 AM CDT
  RURAL SOUTHERN HUMPHREYS COUNTY AT 1130 AM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT FRIDAY AFTERNOON
FOR CENTRAL TENNESSEE.

&&

LAT...LON 3605 8786 3587 8771 3579 8773 3565 8802
      3573 8803 3576 8800 3581 8798 3582 8800
      3581 8802 3585 8803 3585 8811 3585 8812
TIME...MOT...LOC 1606Z 239DEG 38KT 3577 8803

$$

21

1 follow-up statement

000 
WWUS54 KOHX 101613
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1113 AM CDT FRI APR 10 2009

TNC005-085-135-101630-
/O.CON.KOHX.SV.W.0059.000000T0000Z-090410T1630Z/
PERRY TN-BENTON TN-HUMPHREYS TN-
1113 AM CDT FRI APR 10 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT
FOR SOUTHWESTERN HUMPHREYS...SOUTHEASTERN BENTON AND NORTHERN PERRY
COUNTIES...

AT 1113 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
 THIS STORM WAS LOCATED OVER NORTHWESTERN PERRY COUNTY...OR 15 MILES
NORTHWEST OF LINDEN...MOVING NORTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT FRIDAY AFTERNOON
FOR CENTRAL TENNESSEE.

&&

LAT...LON 3605 8786 3587 8771 3579 8773 3565 8802
      3573 8803 3576 8800 3581 8798 3582 8800
      3581 8802 3585 8803 3585 8811 3585 8812
TIME...MOT...LOC 1613Z 239DEG 38KT 3580 8795

$$

21

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 10, 10:55 AM CDT, 11 minutes earlier.

Area forecast discussion, Apr 10, 10:55 AM CDT, 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1055 AM CDT FRI APR 10 2009

.DISCUSSION...
ZONE PACKAGE LOOKS FINE. SVR STORMS HAVE CROSSED THE TENNESSEE RIVER
WITH THE AREA OF STORMS MOVING EWD AT 35-40 MPH. INDIVIDUAL STORMS
ARE MOVING NEWD AT ABOUT THE SAME SPEED. CURRENT MOVEMENT WOULD
BRING STORMS INTO WRN DAVIDSON BY 1140AM. COLD FRONT BEHIND THE
STORMS IS EXPECTED TO PUSH INTO WRN MIDDLE TENNESSEE BY 3 PM
WITH FRONT OUT OF THE PLATEAU BY 8 PM.

&&

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

JLM

Hazardous weather outlook, Apr 10, 5:02 AM CDT, 6 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
502 AM CDT FRI APR 10 2009

TNZ005>011-022>034-056>066-075-077>080-093>095-111015-
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-
502 AM CDT FRI APR 10 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND
EARLY EVENING...AS A STRONG COLD FRONT PASSES. WHILE DAMAGING WIND
AND LARGE HAIL MAY OCCUR... EXPECTED SUPERCELLS MAY PRODUCE ISOLATED
TORNADOES AS WELL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE MONDAY AND MONDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER AND EMERGENCY MANAGER ACTIVATION MAY BE NEEDED TODAY.

07

In the hours before

Local storm report, Apr 10, 9:32 AM CDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
932 AM CDT FRI APR 10 2009

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

0838 AM     HAIL             CLARKSVILLE             36.56N 87.35W
04/10/2009  M0.50 INCH       MONTGOMERY         TN   PUBLIC

            MARBLE SIZE HAIL REPORTED BY COCORAHS OBSERVER IN
            CLARKSVILLE.

&&

JBW

Local storm report, Apr 10, 9:51 AM CDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
951 AM CDT FRI APR 10 2009

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

0350 AM     TSTM WND DMG     4 S HOHENWALD           35.49N 87.56W
04/10/2009                   LEWIS              TN   CO-OP OBSERVER

            TREES DOWN ON POWER LINES, WITH POWER OUTAGES.

0838 AM     HAIL             CLARKSVILLE             36.56N 87.35W
04/10/2009  M0.50 INCH       MONTGOMERY         TN   PUBLIC

            MARBLE SIZE HAIL REPORTED BY COCORAHS OBSERVER IN
            CLARKSVILLE.

&&

JBW

Local storm report, Apr 10, 10:37 AM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1037 AM CDT FRI APR 10 2009

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

1035 AM     HAIL             1 SE BIG SANDY          36.22N 88.07W
04/10/2009  E0.25 INCH       BENTON             TN   EMERGENCY MNGR

            PEA SIZE HAIL OCCURRING JUST SOUTHEAST OF BIG SANDY
            REPORTED BY EMERGENCY MANAGER THROUGH NAWAS.

&&

LAROSA

Local storm report, Apr 10, 10:53 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1053 AM CDT FRI APR 10 2009

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

0912 AM     HAIL             2 ESE ALGOOD            36.19N 85.41W
04/10/2009  M0.50 INCH       PUTNAM             TN   TRAINED SPOTTER

            PEA TO MARBLE SIZE HAIL IN ALGOOD SUBDIVISION OF
            SHENANDOAH.

&&

JBW

Local storm report, Apr 10, 10:54 AM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
1054 AM CDT FRI APR 10 2009

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

0350 AM     TSTM WND DMG     4 S HOHENWALD           35.49N 87.56W
04/10/2009                   LEWIS              TN   CO-OP OBSERVER

            TREES DOWN ON POWER LINES, WITH POWER OUTAGES.

0838 AM     HAIL             CLARKSVILLE             36.56N 87.35W
04/10/2009  M0.50 INCH       MONTGOMERY         TN   PUBLIC

            MARBLE SIZE HAIL REPORTED BY COCORAHS OBSERVER IN
            CLARKSVILLE.

0912 AM     HAIL             2 ESE ALGOOD            36.19N 85.41W
04/10/2009  M0.50 INCH       PUTNAM             TN   TRAINED SPOTTER

            PEA TO MARBLE SIZE HAIL IN ALGOOD SUBDIVISION OF
            SHENANDOAH.

1035 AM     HAIL             1 SE BIG SANDY          36.22N 88.07W
04/10/2009  E0.25 INCH       BENTON             TN   EMERGENCY MNGR

            PEA SIZE HAIL OCCURRING JUST SOUTHEAST OF BIG SANDY
            REPORTED BY EMERGENCY MANAGER THROUGH NAWAS.

&&

JBW

Local storm report, Apr 10, 11:05 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1105 AM CDT FRI APR 10 2009

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

1104 AM     HAIL             TENNESSEE RIDGE         36.32N 87.76W
04/10/2009  E0.75 INCH       HOUSTON            TN   LAW ENFORCEMENT

            PENNY SIZE HAIL REPORTED IN TENNESSEE RIDGE.

&&

LAROSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 3:54 AM CDT	Severe Thunderstorm Warning	OHX	Sumner	36 min
Apr 10, 4:30 AM CDT	Tornado Warning	OHX	Maury	30 min
Apr 10, 4:37 AM CDT	Severe Thunderstorm Warning	OHX	Williamson	38 min
Apr 10, 10:20 AM CDT	Tornado Warning	OHX	Benton, Houston, Stewart	55 min
Apr 10, 10:45 AM CDT	Tornado Warning	OHX	Benton, Houston, Humphreys, Stewart	30 min
Apr 10, 10:54 AM CDT	Areal Flood Advisory	OHX	Benton	3 hr
Apr 10, 11:02 AM CDT	Tornado Warning	OHX	Houston, Montgomery, Stewart	43 min
Apr 10, 11:22 AM CDT	Tornado Warning	OHX	Perry, Wayne	38 min
Apr 10, 11:27 AM CDT	Tornado Warning	OHX	Dickson, Montgomery	33 min
Apr 10, 11:30 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	30 min
Apr 10, 11:36 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Montgomery	39 min
Apr 10, 11:37 AM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	38 min
Apr 10, 11:44 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Perry	46 min
Apr 10, 11:51 AM CDT	Tornado Warning	OHX	Lewis, Perry	24 min
Apr 10, 11:57 AM CDT	Tornado Warning	OHX	Cheatham, Davidson, Montgomery, Robertson	33 min
Apr 10, 12:00 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Williamson	45 min
Apr 10, 12:06 PM CDT	Tornado Warning	OHX	Wayne	24 min
Apr 10, 12:07 PM CDT	Tornado Warning	OHX	Davidson, Rutherford, Williamson	38 min
Apr 10, 12:14 PM CDT	Tornado Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	31 min
Apr 10, 12:18 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury, Williamson	42 min
Apr 10, 12:19 PM CDT	Tornado Warning	OHX	Lawrence, Wayne	26 min
Apr 10, 12:23 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall, Maury	37 min
Apr 10, 12:23 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Williamson	52 min
Apr 10, 12:25 PM CDT	Tornado Warning	OHX	Lawrence, Wayne	50 min
Apr 10, 12:29 PM CDT	Tornado Warning	OHX	Robertson, Sumner	46 min
Apr 10, 12:31 PM CDT	Tornado Warning	OHX	Giles, Marshall, Maury	29 min
Apr 10, 12:33 PM CDT	Tornado Warning Emergency	OHX	Cannon, Rutherford, Wilson	42 min
Apr 10, 12:37 PM CDT	Severe Thunderstorm Warning	OHX	Maury	23 min
Apr 10, 12:43 PM CDT	Tornado Warning	OHX	Maury, Williamson	32 min
Apr 10, 12:46 PM CDT	Tornado Warning	OHX	Giles, Marshall	29 min
Apr 10, 12:49 PM CDT	Tornado Warning	OHX	Giles, Lawrence, Maury	26 min
Apr 10, 12:50 PM CDT	Tornado Warning	OHX	Davidson, Williamson, Wilson	25 min
Apr 10, 12:52 PM CDT	Tornado Warning	OHX	Macon, Sumner	23 min
Apr 10, 12:56 PM CDT	Tornado Warning	OHX	Marshall, Maury	34 min
Apr 10, 12:57 PM CDT	Tornado Warning	OHX	Cannon, DeKalb, Rutherford, Smith, Trousdale, Wilson	48 min
Apr 10, 12:58 PM CDT	Tornado Warning	OHX	Giles, Lawrence	32 min
Apr 10, 1:00 PM CDT	Tornado Warning	OHX	Bedford, Marshall	30 min
Apr 10, 1:12 PM CDT	Tornado Warning	OHX	Bedford, Giles, Marshall	33 min
Apr 10, 1:22 PM CDT	Tornado Warning	OHX	Clay, Macon	23 min
Apr 10, 1:22 PM CDT	Tornado Warning	OHX	Bedford, Coffee, Rutherford	38 min
Apr 10, 1:24 PM CDT	Areal Flood Advisory	OHX	Giles, Marshall, Maury	3 hr
Apr 10, 1:32 PM CDT	Tornado Warning	OHX	Giles	43 min
Apr 10, 1:36 PM CDT	Tornado Warning	OHX	DeKalb, Putnam, Smith, White	39 min
Apr 10, 1:42 PM CDT	Tornado Warning	OHX	Bedford, Cannon, Coffee, Warren	48 min
Apr 10, 1:48 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Overton, Pickett	27 min
Apr 10, 1:51 PM CDT	Tornado Warning	OHX	DeKalb, Jackson, Overton, Putnam	39 min
Apr 10, 1:57 PM CDT	Tornado Warning	OHX	Bedford, Coffee, Grundy	48 min
Apr 10, 2:09 PM CDT	Tornado Warning	OHX	Fentress, Overton, Putnam, White	51 min
Apr 10, 2:15 PM CDT	Tornado Warning	OHX	Cumberland, DeKalb, Putnam, Van Buren, Warren, White	30 min
Apr 10, 2:25 PM CDT	Tornado Warning	OHX	Coffee, Grundy	35 min
Apr 10, 2:32 PM CDT	Tornado Warning	OHX	Cumberland, Fentress, Overton, Putnam	43 min
Apr 10, 2:43 PM CDT	Tornado Warning	OHX	Cumberland, Van Buren, Warren, White	47 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2009 Every severe thunderstorm warning in 2009

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.