Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 69, NWS Nashville, TN

April 10, 2009Clay County, Overton County, Pickett County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 10, 2009, 1:48 PM CDT for Clay County, Overton County, Pickett County, Tennessee. It was in force for 27 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, 1:48 PM CDT (18:48 UTC)
Expired: Apr 10, 2009, 2:15 PM CDT
In force: 27 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Clay County, TN, Overton County, TN, Pickett County, TN

The radar

The Nashville radar (KOHX), 121 km from the middle of the area, began a volume at 18:47 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.

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
Apr 10, 11:23 AM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.8 hours before the alert went out and 128 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 101848
SVROHX
TNC027-133-137-101915-
/O.NEW.KOHX.SV.W.0069.090410T1848Z-090410T1915Z/

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

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CLAY COUNTY IN MIDDLE TENNESSEE...
  NORTHERN OVERTON COUNTY IN MIDDLE TENNESSEE...
  WESTERN PICKETT COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF BYRDSTOWN...

* UNTIL 215 PM CDT

* AT 147 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 17 MILES WEST OF BYRDSTOWN...OR
  6 MILES SOUTHEAST OF CELINA...AND MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BYRDSTOWN BY 215 PM 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. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
700 PM CDT FRIDAY EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3644 8509 3643 8546 3662 8552 3663 8536
      3663 8506
TIME...MOT...LOC 1848Z 247DEG 27KT 3650 8541

$$

21

1 follow-up statement

000 
WWUS54 KOHX 101857
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
157 PM CDT FRI APR 10 2009

TNC027-133-137-101915-
/O.CON.KOHX.SV.W.0069.000000T0000Z-090410T1915Z/
OVERTON TN-PICKETT TN-CLAY TN-
157 PM CDT FRI APR 10 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CDT
FOR EASTERN CLAY...WESTERN PICKETT AND NORTHERN OVERTON COUNTIES...

AT 156 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12 MILES WEST OF
BYRDSTOWN...OR 9 MILES EAST OF CELINA...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BYRDSTOWN BY 215 PM 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. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
700 PM CDT FRIDAY EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3644 8509 3643 8546 3662 8552 3663 8536
      3663 8506
TIME...MOT...LOC 1857Z 264DEG 23KT 3652 8533

$$

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, 2 hours 53 minutes earlier.

Area forecast discussion, Apr 10, 10:55 AM CDT, 2 hours 53 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, 8 hours 46 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, 1:34 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
134 PM CDT FRI APR 10 2009

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

0105 PM     TSTM WND DMG     PORTLAND                36.59N 86.52W
04/10/2009                   SUMNER             TN   TRAINED SPOTTER

            ON HIGHWAY 52...BETWEEN PORTLAND AND WESTMORELAND...ON
            CRESSVILLE ROAD...TWO ROOFS OF HOMES DAMAGED.

&&

JBW

Local storm report, Apr 10, 1:37 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
137 PM CDT FRI APR 10 2009

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

1259 PM     HAIL             COLUMBIA                35.62N 87.05W
04/10/2009  E0.88 INCH       MAURY              TN   PUBLIC

            NICKEL SIZE HAIL WAS REPORTED ON TOM J. HITCH PARKWAY.

&&

JBW

Local storm report, Apr 10, 1:38 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
138 PM CDT FRI APR 10 2009

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

1247 PM     TORNADO          MURFREESBORO            35.85N 86.39W
04/10/2009                   RUTHERFORD         TN   TRAINED SPOTTER

            TRAINED SPOTTER REPORTED POSSIBLE TORNADO ON GROUND IN
            MURFREESBORO.

&&

JBW

Local storm report, Apr 10, 1:41 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
141 PM CDT FRI APR 10 2009

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

0141 PM     FUNNEL CLOUD     WALTERHILL              35.96N 86.38W
04/10/2009                   RUTHERFORD         TN   AMATEUR RADIO

            AMATUER RADIO REPORTED A FUNNEL CLOUD IN THE WALTER HILL
            AREA.

&&

LAROSA

Local storm report, Apr 10, 1:42 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
142 PM CDT FRI APR 10 2009

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

1250 PM     TSTM WND DMG     MURFREESBORO            35.85N 86.39W
04/10/2009                   RUTHERFORD         TN   PUBLIC

            ROOF DAMAGE WAS REPORTED AT BLACKMEN ELEMENTARY SCHOOL
            WITH TREES DOWN IN THE VICINITY.

&&

JBW

Local storm report, Apr 10, 1:46 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
146 PM CDT FRI APR 10 2009

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

1246 PM     HAIL             6 W LEWISBURG           35.45N 86.89W
04/10/2009  M1.75 INCH       MARSHALL           TN   AIRPLANE PILOT

            GOLF BALL SIZE HAIL WAS REPORTED AT THE INTERSECTION OF
            HIGHWAY 373 AND INTERSTATE 65.

&&

JBW

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, 11:06 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys, Perry	24 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, 1:51 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; radar from the NEXRAD Level II archive.