Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 29, NWS Nashville, TN

March 28, 20094 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 28, 2009, 4:56 PM CDT for 4 counties in Tennessee. It was in force for 32 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: Mar 28, 2009, 4:56 PM CDT (21:56 UTC)
Expired: Mar 28, 2009, 5:28 PM CDT
In force: 32 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cheatham County, TN, Dickson County, TN, Hickman County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 69 km from the middle of the area, began a volume at 21:57 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
Mar 28, 4:56 PM CDT	HAIL 1	2 S Dickson, TN	SPOTTER REPORTED 1 INCH HAIL AT 1-40 AND HIGHWAY 46.

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 one storm report to this severe thunderstorm warning; the first came 0 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
Mar 28, 2:23 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.9 hours before the alert went out and 64 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: 5 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 574 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 75 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 282156
SVROHX
TNC021-043-081-187-282245-
/O.NEW.KOHX.SV.W.0029.090328T2156Z-090328T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
456 PM CDT SAT MAR 28 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHEATHAM COUNTY IN MIDDLE TENNESSEE...
  DICKSON COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF DICKSON...
  NORTHEASTERN HICKMAN COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF CENTERVILLE...
  NORTHWESTERN WILLIAMSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 545 PM CDT

* AT 455 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR CENTERVILLE...AND
  MOVING NORTH AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BURNS BY 525 PM CDT...
  DICKSON BY 530 PM CDT...
  WHITE BLUFF BY 535 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 900 PM CDT SATURDAY EVENING
FOR CENTRAL TENNESSEE.

&&

LAT...LON 3632 8732 3622 8699 3571 8728 3575 8750
      3633 8745
TIME...MOT...LOC 2156Z 193DEG 25KT 3584 8736

$$

07

2 follow-up statements

000 
WWUS54 KOHX 282206
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
506 PM CDT SAT MAR 28 2009

TNC021-043-081-187-282245-
/O.CON.KOHX.SV.W.0029.000000T0000Z-090328T2245Z/
HICKMAN TN-WILLIAMSON TN-DICKSON TN-CHEATHAM TN-
506 PM CDT SAT MAR 28 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN CHEATHAM...DICKSON...NORTHWESTERN WILLIAMSON AND EASTERN
HICKMAN COUNTIES...

AT 505 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED 10 MILES
NORTHEAST OF CENTERVILLE...MOVING NORTH AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BURNS BY 525 PM CDT...
  DICKSON BY 530 PM CDT...
  WHITE BLUFF BY 535 PM CDT...
  CHARLOTTE BY 540 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 900 PM CDT SATURDAY EVENING
FOR CENTRAL TENNESSEE.

&&

LAT...LON 3632 8732 3622 8699 3571 8728 3575 8750
      3633 8745
TIME...MOT...LOC 2206Z 193DEG 25KT 3591 8734

$$

07

000 
WWUS54 KOHX 282228
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
528 PM CDT SAT MAR 28 2009

TNC021-043-081-187-282239-
/O.CAN.KOHX.SV.W.0029.000000T0000Z-090328T2245Z/
HICKMAN TN-WILLIAMSON TN-DICKSON TN-CHEATHAM TN-
528 PM CDT SAT MAR 28 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHEATHAM...DICKSON...
NORTHWESTERN WILLIAMSON AND EASTERN HICKMAN COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SATURDAY EVENING
FOR CENTRAL TENNESSEE.

LAT...LON 3632 8732 3622 8699 3571 8728 3575 8750
      3633 8745
TIME...MOT...LOC 2229Z 193DEG 25KT 3606 8730

$$

13

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 Mar 28, 2:57 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Mar 28, 2:57 PM CDT, 1 hour 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
257 PM CDT SAT MAR 28 2009

.DISCUSSION...
HAVE JUST ISSUED A TOR WATCH FOR ESSENTIALLY THE WESTERN 2/3 OF
CWA TIL 02Z. THIS MAY BE EXTENDED FURTHER E LATER TONIGHT AS
STRONG COLD FRONT MOVES ACROSS.

FRONT WILL REACH BNA AROUND 00Z. AFTER FROPA TONITE...WRAP-AROUND
CLOUDINESS AND SCT -SHRA INTO SUN.

WEAK HI PRES PREVAILS THEREAFTER INTO MON W/ WEAK RETURN FLOW MON
AFTERNOON. MON NITE THE NEXT SYSTEM MOVES NNE ACROSS CNTRL PLAINS
STATES W/ FRONT INTO CNTRL AR BY 12Z TUE. CHANCE OF SHRA W...SLITE
CHANCE ELSEWHERE. FRONT MOVES INTO W TN TUE AFTERNOON AND ACROSS
CWA TUE NITE...WITH LIKELY POPS.

YET ANOTHER SYSTEM MOVES IN FROM W ON THU WITH HI PRES THU NITE
AND FRI. CHANCE OF WAA -SHRA SAT.
&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      39  49  35  65 /  80  20   0  10
CLARKSVILLE    37  48  33  67 /  80  20   0  10
CROSSVILLE     38  44  31  63 /  80  30   0  10
COLUMBIA       39  50  35  67 /  80  20   0  10
LAWRENCEBURG   39  51  35  68 /  80  20   0  10
WAVERLY        38  49  34  67 /  80  20   0  10
&&

.OHX WATCHES/WARNINGS/ADVISORIES...
FLOOD WATCH THROUGH SUNDAY MORNING FOR TNZ011-027-028-030>034-
056>066-075-077>080-093>095.

&&

17/MAG

Hazardous weather outlook, Mar 28, 5:02 AM CDT, 11 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
502 AM CDT SAT MAR 28 2009

TNZ011-027-028-030>034-056>066-075-077>080-093>095-291030-
PICKETT-DAVIDSON-WILSON-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 SAT MAR 28 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A FLOOD WATCH IS IN EFFECT TODAY AND TONIGHT. A STRONG COLD FRONT
WILL SWING THROUGH MIDDLE TENNESSEE TODAY, BRINGING WIDESPREAD
HEAVY RAINFALL AND THUNDERSTORMS. THERE IS A SLIGHT RISK OF
SEVERE STORMS TODAY, AS WELL, WITH THE PRIMARY THREATS BEING LARGE
HAIL AND DAMAGING WIND.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER AND EMERGENCY MANAGER ACTIVATION MAY BE NEEDED.

TNZ005>010-022>026-029-291030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-BENTON-HOUSTON-
HUMPHREYS-DICKSON-CHEATHAM-TROUSDALE-
502 AM CDT SAT MAR 28 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A STRONG COLD FRONT WILL SWING THROUGH MIDDLE TENNESSEE TODAY,
BRINGING WIDESPREAD SHOWERS AND THUNDERSTORMS. THERE IS A SLIGHT
RISK OF SEVERE STORMS TODAY, AS WELL, WITH THE PRIMARY THREATS
BEING LARGE HAIL AND DAMAGING WIND.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER AND EMERGENCY MANAGER ACTIVATION MAY BE NEEDED.

ROSE

In the hours before

Local storm report, Mar 28, 4:26 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
426 PM CDT SAT MAR 28 2009

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

0415 PM     HAIL             DOVER                   36.48N 87.84W
03/28/2009  E0.50 INCH       STEWART            TN   TRAINED SPOTTER

            DIME SIZE HAIL REPORTED IN DOVER

&&

LAROSA

Local storm report, Mar 28, 4:33 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
433 PM CDT SAT MAR 28 2009

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

0415 PM     HAIL             DOVER                   36.48N 87.84W
03/28/2009  E0.75 INCH       STEWART            TN   LAW ENFORCEMENT

            STEWART COUNTY SHERIFF REPORTED 3/4 INCH HAIL.

&&

LAROSA

Local storm report, Mar 28, 4:34 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
434 PM CDT SAT MAR 28 2009

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

0420 PM     HAIL             5 SW KINGSTON SPRINGS   36.05N 87.16W
03/28/2009  E0.88 INCH       WILLIAMSON         TN   PUBLIC

            COCORAHS OBSERVER REPORTED 7/8 INCH HAIL.

&&

LAROSA

Local storm report, Mar 28, 4:48 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
448 PM CDT SAT MAR 28 2009

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

0420 PM     HAIL             5 NW ASHLAND CITY       36.33N 87.12W
03/28/2009  E1.00 INCH       CHEATHAM           TN   TRAINED SPOTTER

            SPOTTER REPORTED 1 INCH HAIL NORTHWEST OF ASHLAND CITY

&&

LAROSA

Local storm report, Mar 28, 4:48 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NASHVILLE TN
448 PM CDT SAT MAR 28 2009

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

0445 PM     HAIL             5 NW ASHLAND CITY       36.33N 87.12W
03/28/2009  E1.00 INCH       CHEATHAM           TN   TRAINED SPOTTER

            SPOTTER REPORTED 1 INCH HAIL NORTHWEST OF ASHLAND CITY

&&

LAROSA

Local storm report, Mar 28, 4:54 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
454 PM CDT SAT MAR 28 2009

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

0453 PM     FUNNEL CLOUD     5 NW CLARKSVILLE        36.61N 87.41W
03/28/2009                   MONTGOMERY         TN   TRAINED SPOTTER

            FUNNEL CLOUD SPOTTED NORTHWEST OF CLARKSVILLE NEAR FORT
            CAMPBELL.

&&

LAROSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 3:35 PM CDT	Severe Thunderstorm Warning	OHX	Benton, Stewart	10 min
Mar 28, 3:43 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	32 min
Mar 28, 4:13 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	32 min
Mar 28, 4:18 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Williamson	42 min
Mar 28, 4:20 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	25 min
Mar 28, 4:35 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Montgomery, Robertson	40 min
Mar 28, 4:44 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	31 min
Mar 28, 4:47 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Montgomery	28 min
Mar 28, 4:55 PM CDT	Tornado Warning	OHX	Montgomery	16 min
Mar 28, 4:59 PM CDT	Tornado Warning	OHX	Dickson, Montgomery	31 min
Mar 28, 5:11 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Maury, Williamson	34 min
Mar 28, 5:19 PM CDT	Tornado Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Maury, Williamson	26 min
Mar 28, 5:22 PM CDT	Tornado Warning	OHX	Maury	23 min
Mar 28, 5:26 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Montgomery, Robertson	49 min
Mar 28, 5:37 PM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	23 min
Mar 28, 5:40 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Williamson	35 min
Mar 28, 5:41 PM CDT	Tornado Warning	OHX	Cheatham, Davidson, Williamson	35 min
Mar 28, 5:51 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	24 min
Mar 28, 5:59 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall	31 min
Mar 28, 6:09 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Rutherford, Williamson	36 min
Mar 28, 6:13 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	47 min
Mar 28, 6:26 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall	34 min
Mar 28, 6:50 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford, Wilson	25 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.