Alert archive / Tennessee / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 293, NWS Nashville, TN

July 28, 1997Cannon County, DeKalb County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 28, 1997, 5:23 PM CDT for Cannon County, DeKalb County, Tennessee. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 28, 1997, 5:23 PM CDT (22:23 UTC)
Expired: Jul 28, 1997, 6:30 PM CDT
In force: 67 min
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Cannon County, TN, DeKalb County, TN

The radar

The Nashville radar (KOHX), 68 km from the middle of the area, began a volume at 22:26 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
Jul 28, 5:40 PM CDT	Thunderstorm Wind 50	Smithville, TN	Caney Fork Electric reported power lines were down across the county.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.4 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: 3105 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1167 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBNA 282222 RRA
SVRBNA
TNC015-041-149-282330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
523 PM CDT MON JUL 28 1997
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN MIDDLE TENNESSEE
 
   ...CANNON COUNTY...DE KALB COUNTY...RUTHERFORD COUNTY
 
AT 520 PM...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM
JUST SOUTH OF CARTHAGE TO NEAR WATERTOWN TO SOUTWEST OF LEBANON NEAR THE
TOWN OF GLADEVILLE. MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR. THE
COMMUNITIES OF SMITHVILLE...WOODBURY...MUFREESBORO...SMYRNA...AUBURNTOWN
...LACASSAS...AND CENTER HILL LAKE. THESE STORMS HAVE A HISTORY OF
PRODUCING WIND DAMAGE.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE INf SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 Jul 28, 1:47 PM CDT, 3 hours 36 minutes earlier.

Area forecast discussion, Jul 28, 1:47 PM CDT, 3 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
140 PM CDT MON JUL 28 1997

GOOD AREAL COVERAGE OF TSRA THIS AFTERNOON WITH A FEW APPROACHING
SVR LVLS. THIS ACTIVITY OF THE DIURNAL NATURE AND SHUD BECOME
LESS ORGANIZED THRU EVENING. HOWEVER...PRE FRNTL TROF SHOWING UP ON
KOHX AND SFC PLOT EXTENDING FROM SDF SOUTHWEST TO THE MO BOOTHEEL.
EXPECT SCATTERED DEVELOPMENT ALONG THE TROF TO MV INTO MID STATE BY
ARND MIDNIGHT. WND CONV WILL BE MINIMAL AS WINDS ALREADY FM THE
NW...BUT MSTR CONV AND OUTFLOW BOUNDARIES FROM AFTERNOON CONVECTION
SHUD AID REDEVELOPMENT.

LOOKING AT THE MODELS...LIKE THE SLOWER NGM/AVN SOLN AS COMPARED TO
THE ETA. SLOW RETROGRESSION OF H5 NE US L/W TROF ALONG WITH
IMPRESSIVE SFC HIGH FOR THIS TIME OF YEAR WILL DRIVE FRNT THROUGH BNA
BY ARND 15Z AND TO NR THE AL BORDER BY 22-23Z. GOOD MSTR CONV INDICATED
AT H85/H10 ALONG FRNT...SO MORE SCATTERED ACTIVITY POSSIBLE WITH FROPA.

HAVING SAID ALL THAT...LIKE THE FWC POPS FOR TNGT AND ALSO FOR TMRW.
WUD WORD 2ND PERIOD POPS AS "MAINLY IN THE MORNING" ACROSS THE NORTH AS
FRNT AND ASSOCIATED LIFT/MSTR AXIS TO MV THROUGH EARLY. PROBABLY NEED
HIER POPS ACROSS THE SOUTH FOR 2ND PD AS FRNT TO MV THU DURING MAX
HEATING. FWC/FAN TMPS IN CLOSE AGREEMENT AND SEE NO REASON FOR MAJOR
DEVIATIONS.

WEDNESDAY...LESS HEAT...LESS HUMIDITY...WHAT MORE IS THERE TO SAY!

BNA 76/92/67/88 4300
13/CBD

In the hours before

Local storm report, Jul 28, 1:54 PM CDT, 3 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
155 PM CDT MON JUL 28 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0127 PM$    2 SE BYRDSTOWN            TN   WIND DAMAGE
07/28/97   PICKETT                        SHERIFF'S OFFICE REPORTED A
                                          TREE BLOWN DOWN.

END/ORCHANIAN

Local storm report, Jul 28, 1:55 PM CDT, 3 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
155 PM CDT MON JUL 28 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0127 PM    2 SE BYRDSTOWN            TN   WIND DAMAGE
07/28/97   PICKETT                        SHERIFFS OFFICE REPORTED A
                                          TREE BLOWN DOWN.

END/ORCHANIAN

Local storm report, Jul 28, 3:51 PM CDT, 1 hour 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
351 PM CDT MON JUL 28 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0310 PM    COOKEVILLE                TN   WIND DAMAGE
07/28/97   PUTNAM                         COUNTY SHERIFF REPORTED 1
                                          TREE BLOWN DOWN 3 TO 4
                                          MILES SOUTH OF COOKEVILLE.

0315 PM    SPARTA                    TN   WIND DAMAGE
07/28/97   WHITE                          ELECTRIC COMPANY REPORTED
                                          1 TREE BLOWN DOWN 8 MILES
                                          NORTH OF SPARTA.

0315 PM    COOKEVILLE                TN   WIND DAMAGE
07/28/97   PUTNAM                         PUTNAM COUNTY EMA REPORTED
                                          MANY TREES AND POWER LINES
                                          BLOWN DOWN AND SIDE OF
                                          HOUSE DAMAGED AT DITTY
                                          OR ABOUT 6 MILES
                                          SOUTHWEST OF COOKEVILLE.

STEIGERWALDT

Local storm report, Jul 28, 3:54 PM CDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
351 PM CDT MON JUL 28 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0310 PM    COOKEVILLE                TN   WIND DAMAGE
07/28/97   PUTNAM                         COUNTY SHERIFF REPORTED 1
                                          TREE BLOWN DOWN 3 TO 4
                                          MILES SOUTH OF COOKEVILLE.

0315 PM    SPARTA                    TN   WIND DAMAGE
07/28/97   WHITE                          ELECTRIC COMPANY REPORTED
                                          1 TREE BLOWN DOWN 8 MILES
                                          NORTH OF SPARTA.

0315 PM    COOKEVILLE                TN   WIND DAMAGE
07/28/97   PUTNAM                         PUTNAM COUNTY EMA REPORTED
                                          MANY TREES AND POWER LINES
                                          BLOWN DOWN AND SIDE OF
                                          HOUSE DAMAGED AT DITTY
                                          OR ABOUT 6 MILES
                                          SOUTHWEST OF COOKEVILLE.

STEIGERWALDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:54 PM CDT	Severe Thunderstorm Warning	OHX	Pickett	51 min
Jul 28, 2:33 PM CDT	Severe Thunderstorm Warning	OHX	Giles	42 min
Jul 28, 2:58 PM CDT	Severe Thunderstorm Warning	OHX	Putnam, White	47 min
Jul 28, 4:04 PM CDT	Severe Thunderstorm Warning	OHX	Robertson, Sumner	56 min
Jul 28, 4:14 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Lewis, Wayne	46 min
Jul 28, 4:22 PM CDT	Severe Thunderstorm Warning	OHX	Macon	38 min
Jul 28, 4:31 PM CDT	Severe Thunderstorm Warning	OHX	Marion	44 min
Jul 28, 4:40 PM CDT	Severe Thunderstorm Warning	OHX	Smith, Trousdale, Wilson	50 min
Jul 28, 4:55 PM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	50 min
Jul 28, 5:06 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson	54 min
Jul 28, 5:23 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	67 min
Jul 28, 5:43 PM CDT	Flash Flood Warning	OHX	Davidson, Williamson	2 hr
Jul 28, 5:50 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	25 min
Jul 28, 6:15 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson	45 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1997 Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.