Alert archive / Tennessee / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 55, NWS Nashville, TN

April 2, 2006DeKalb County, Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 2, 2006, 4:45 PM CDT for DeKalb County, Smith County, Tennessee. It was in force for 21 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: Apr 2, 2006, 4:45 PM CDT (21:45 UTC)
Expired: Apr 2, 2006, 5:06 PM CDT
In force: 21 min
Issued by: NWS Nashville, TN
Area: Counties, with a storm outline in the text

Counties DeKalb County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 58 km from the middle of the area, began a volume at 21:46 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 2, 4:50 PM CDT	TSTM WND DMG	10 Nw Smithville, TN	TREES BLOWN DOWN

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 5 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 59 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: 1347 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 022145
SVROHX
TNC041-159-022215-
/O.NEW.KOHX.SV.W.0055.060402T2145Z-060402T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
445 PM CDT SUN APR 2 2006

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DE KALB COUNTY IN TENNESSEE
  SMITH COUNTY IN TENNESSEE

* UNTIL 515 PM CDT

* AT 442 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 8 MILES SOUTH OF GORDONSVILLE...
  OR ABOUT 11 MILES NORTHWEST OF SMITHVILLE...AND MOVING NORTHEAST AT
  45 MPH.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 3613 8608 3597 8598 3595 8571 3626 8587

$$

21

2 follow-up statements

000 
WWUS54 KOHX 022158
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
458 PM CDT SUN APR 2 2006

TNC159-022208-
/O.CAN.KOHX.SV.W.0055.000000T0000Z-060402T2215Z/
SMITH TN-
458 PM CDT SUN APR 2 2006

...THE SEVERE THUNDERSTORM WARNING FOR SMITH COUNTY IS CANCELLED...

LAT...LON 3605 8601 3599 8602 3597 8575 3608 8579

$$

TNC041-022215-
/O.CON.KOHX.SV.W.0055.000000T0000Z-060402T2215Z/
DE KALB TN-
458 PM CDT SUN APR 2 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT 
FOR DE KALB COUNTY...

AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 20 MILES NORTHEAST OF DOWELLTOWN TO 12 MILES EAST OF
DOWELLTOWN...OR ALONG A LINE EXTENDING FROM 10 MILES SOUTH OF
GAINESBORO TO 7 MILES NORTHEAST OF SMITHVILLE...MOVING NORTHEAST AT
45 MPH.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 3605 8601 3599 8602 3597 8575 3608 8579

$$

21

000 
WWUS54 KOHX 022206
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
506 PM CDT SUN APR 2 2006

TNC041-022216-
/O.CAN.KOHX.SV.W.0055.000000T0000Z-060402T2215Z/
DE KALB TN-
506 PM CDT SUN APR 2 2006

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL DE KALB COUNTY IS
CANCELLED...

LAT...LON 3605 8601 3599 8602 3597 8575 3608 8579

$$

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 2, 1:50 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, Apr 2, 1:50 PM CDT, 2 hours 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
150 PM CDT SUN APR 2 2006

.DISCUSSION...
MAIN QUESTION FOR THIS FORECAST IS CONVECTION THIS EVENING AND
TONIGHT. MOS GUIDANCE POPS SEEM ABNORMALLY LOW (20-30%) GIVEN
THE APPROACH OF A SIGNIFICANT SHORTWAVE TROUGH LATE TONIGHT.
MESOETA FORECAST SOUNDINGS SEEM TO ARGUE BOTH FOR AND AGAINST. A
LARGE PORTION OF THE COLUMN ABOVE 750MB DRIES OUT SIGNIFICANTLY WITH
PRECIPITABLE WATER DROPPING FROM 1.28 INCHES TO 0.94 INCHES IN 6
HOURS. IF THIS HAPPENS...IT WOULD LIKELY SIGNIFICANTLY LIMIT
THUNDERSTORM ACTIVITY. ON THE OTHER HAND...THE DRIER AIR ALOFT WOULD
BE MORE CONDUCIVE TO TSTM DOWNBURST WINDS FOR THE TSTMS THAT DO
MANAGE TO FORM. ALSO...THE FORECAST SOUNDINGS KEEP LIFTED INDICES
AT -4 OR LESS ALL NIGHT WITH TOTAL TOTALS NEAR OR ABOVE 50.

I GUESS THE UPSHOT OF THIS DATA IS THAT I WILL TAKE THE PATH OF
LEAST REGRET AND GO SIGNIFICANTLY ABOVE POPS AND WILL ALSO MENTION
THE POSSIBILITY OF SVR STORMS FOR THE EVENING HOURS...GIVEN THAT SELS
HAS ALL OF THE AREA IN A SLIGHT RISK OF SEVERE TSTMS.

WILL HANG ON TO A SLIGHT CHANCE OF RAIN FOR TOMORROW MORNING
UNTIL THE SFC RIDGE BEGINS TO MOVE IN AND SHUT OFF ANY CHANCE OF
RAIN. THE 1000-850 LAYER TEMPS INDICATE THAT THE COLD FRONT WONT
GET INTO NW MIDDLE TENNESSEE UNTIL 7 AM TOMORROW MORNING AND
PROGRESS RAPIDLY EWD ACROSS THE STATE DURING THE MORNING.

SFC RIDGE AFFECTS THE AREA FROM MON NGT THROUGH TUE NGT AS THE NEXT
LOW PRESSURE SYSTEM PUSHES INTO THE PLAINS ON WED AND GENERATES A
CHANCE OF RAIN FOR LATE WED NGT AND ON THU AS THE ASSOCD WRM FRONT
MOVES INTO THE AREA. CHANCE OF RAIN WILL CONTINUE AS THE LOW PUSHES
EWD ACROSS THE OHIO VALLEY...DRAGGING A COLD FRONT THROUGH THE STATE
SAT AM. &&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE    57  66  37  63 /  50  20   5   0
CLARKSVILLE  56  62  35  60 /  50  20   5   0
CROSSVILLE   56  64  35  58 /  60  30  10   0

&&

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

JLM

Hazardous weather outlook, Apr 2, 5:30 AM CDT, 11 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT SUN APR 2 2006

TNZ005>011-022>034-056>066-075-077>080-093>095-031030-
BEDFORD-BENTON-CANNON-CHEATHAM-CLAY-COFFEE-CUMBERLAND-DAVIDSON-
DEKALB-DICKSON-FENTRESS-GILES-GRUNDY-HICKMAN-HOUSTON-HUMPHREYS-
JACKSON-LAWRENCE-LEWIS-MACON-MARSHALL-MAURY-MONTGOMERY-OVERTON-PERRY-
PICKETT-PUTNAM-ROBERTSON-RUTHERFORD-SMITH-STEWART-SUMNER-TROUSDALE-
VAN BUREN-WARREN-WAYNE-WHITE-WILLIAMSON-WILSON-
530 AM CDT SUN APR 2 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A WARM FRONT WILL MOVE NORTHWARD ACROSS THE AREA TODAY AND
PRODUCE THE LIKELIHOOD FOR THUNDERSTORMS. A FEW OF THE
STORMS COULD BECOME SEVERE WITH HAIL AND DAMAGING WINDS.

A COLD FRONT WILL MOVE IN TONIGHT...AND BRING A SQUALL LINE
WITH IT. A FEW STORMS MAY BE SEVERE WITH HAIL AND DAMAGING
WINDS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

ANOTHER COLD FRONT IS EXPECTED LATE IN THE WEEK...ON
THURSDAY NIGHT AND FRIDAY...AND MAY PRODUCE ISOLATED
SEVERE THUNDERSTORMS IN THE MID STATE.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT
PERSONNEL IS POSSIBLE TODAY AND TONIGHT.

19

In the hours before

Special weather statement, Apr 2, 2:51 PM CDT, 1 hour 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
251 PM CDT SUN APR 2 2006

TNZ056-022020-
PERRY-
251 PM CDT SUN APR 2 2006

...STRONG THUNDERSTORM MOVING THROUGH SOUTHERN PERRY COUNTY...

AT 250 PM...RADAR INDICATED A STRONG THUNDERSTORMS MOVING THROUGH
SOUTHERN PERRY COUNTY. THIS STORM WILL PRODUCE BRIEF HEAVY RAINFALL
AND WIND GUSTS UP TO 40 MPH AS IT MOVES TO THE EAST NORTHEAST AT 45
MPH. IN ADDITION...SOME SMALL HAIL WILL ALSO BE POSSIBLE. THE STORM
WILL PASS JUST SOUTH OF LINDEN BY 3 PM.

21

Special weather statement, Apr 2, 3:19 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
319 PM CDT SUN APR 2 2006

TNZ027-022050-
DAVIDSON-
319 PM CDT SUN APR 2 2006

...STRONG THUNDERSTORMS MOVING INTO DAVIDSON COUNTY...

AT 315 PM...RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS MOVING
INTO WESTERN DAVIDSON COUNTY. THIS STORM WILL PRODUCE HEAVY
RAINFALL...WIND GUSTS UP TO 45 MPH...AND SOME SMALL HAIL AS THE
STORMS MOVE TO THE EAST NORTHEAST AT 45 MPH. THE STORMS WILL REACH
DOWNTOWN NASHVILLE AROUND 325 PM OR 330 PM.

21

Local storm report, Apr 2, 3:53 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
353 PM CDT SUN APR 02 2006

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

0255 PM     TSTM WND DMG     2 N LINDEN              35.64N 87.84W
04/02/2006                   PERRY              TN   LAW ENFORCEMENT

            TREES DOWN 2N OF LINDEN. CAR DAMAGED BY FALLING TREE.
            PORCH ON TRAILER DAMAGED.

&&

JMOSER

Local storm report, Apr 2, 4:15 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
415 PM CDT SUN APR 02 2006

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

0355 PM     TSTM WND DMG     FRANKLIN                35.93N 86.84W
04/02/2006                   WILLIAMSON         TN   LAW ENFORCEMENT

            NUMEROUS TREES DOWN COUNTY-WIDE

0405 PM     TSTM WND DMG     SMYRNA                  35.98N 86.52W
04/02/2006                   RUTHERFORD         TN   TRAINED SPOTTER

            TREES DOWN

&&

MGIRODO

Local storm report, Apr 2, 4:34 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
434 PM CDT SUN APR 02 2006

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

0415 PM     TSTM WND DMG     5 W MURFREESBORO        35.85N 86.48W
04/02/2006                   RUTHERFORD         TN   TRAINED SPOTTER

            TREES BLOWN DOWN. WINDS ESTIMATED AT 50-60 MPH. SOME
            SIDING AND SHINGLES BLOWN OFF HOUSE.

&&

JMOSER

Local storm report, Apr 2, 4:44 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
444 PM CDT SUN APR 02 2006

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

0355 PM     TSTM WND DMG     4 E COLUMBIA            35.62N 86.98W
04/02/2006                   MAURY              TN   TRAINED SPOTTER

            LARGE TREES DOWN WITH SMALL HAIL

&&

MGIRODO

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 4:16 AM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	29 min
Apr 2, 2:59 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham	16 min
Apr 2, 3:49 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Williamson	26 min
Apr 2, 4:10 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton	50 min
Apr 2, 4:11 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	19 min
Apr 2, 4:18 PM CDT	Severe Thunderstorm Warning	OHX	Wilson	27 min
Apr 2, 4:20 PM CDT	Tornado Warning	OHX	Clay, Jackson, Pickett	40 min
Apr 2, 4:30 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Rutherford	30 min
Apr 2, 4:40 PM CDT	Tornado Warning	OHX	Overton	35 min
Apr 2, 4:54 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Putnam	51 min
Apr 2, 4:55 PM CDT	Tornado Warning	OHX	Overton, Pickett	35 min
Apr 2, 5:02 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	43 min
Apr 2, 5:13 PM CDT	Severe Thunderstorm Warning	OHX	White	32 min
Apr 2, 5:19 PM CDT	Tornado Warning	OHX	Fentress	26 min
Apr 2, 5:31 PM CDT	Severe Thunderstorm Warning	OHX	Overton, Pickett	29 min
Apr 2, 5:43 PM CDT	Severe Thunderstorm Warning	OHX	Fentress	32 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2006 Every severe thunderstorm warning in 2006

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.