Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 81, NWS Nashville, TN

June 17, 2018Maury County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 17, 2018, 4:41 PM CDT for Maury County, Tennessee. It was in force for 17 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: Jun 17, 2018, 4:41 PM CDT (21:41 UTC)
Expired: Jun 17, 2018, 4:58 PM CDT
In force: 17 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Maury County, TN

The radar

The Nashville radar (KOHX), 88 km from the middle of the area, began a volume at 21:42 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.7 hours before the alert went out and 75 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: 1212 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1242 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

829 
WUUS54 KOHX 172141
SVROHX
TNC119-172230-
/O.NEW.KOHX.SV.W.0081.180617T2141Z-180617T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
441 PM CDT SUN JUN 17 2018

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Central Maury County in Middle Tennessee...

* Until 530 PM CDT.

* At 441 PM CDT, a severe thunderstorm was located near Columbia,
  moving south at 5 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Columbia, Mount Pleasant, Williamsport and Culleoka. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3572 8720 3568 8699 3548 8698 3548 8715
      3558 8729
TIME...MOT...LOC 2141Z 010DEG 5KT 3560 8711 

HAIL...1.00IN
WIND...60MPH
 
$$

13

1 follow-up statement

381 
WWUS54 KOHX 172158
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
458 PM CDT SUN JUN 17 2018

TNC119-172208-
/O.CAN.KOHX.SV.W.0081.000000T0000Z-180617T2230Z/
Maury TN-
458 PM CDT SUN JUN 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MAURY COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3572 8720 3568 8699 3548 8698 3548 8715
      3558 8729
TIME...MOT...LOC 2157Z 010DEG 5KT 3558 8712 

$$

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 Jun 17, 1:31 PM CDT, 3 hours 10 minutes earlier.

Area forecast discussion, Jun 17, 1:31 PM CDT, 3 hours 10 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
131 PM CDT Sun Jun 17 2018

.DISCUSSION...

Already cells are popping up along the Cumberland Plateau with a
cumulus field filling in across the remainder of Middle Tennessee.
Expect cells to become more widespread during the afternoon, then
mostly dissipate by sunset. Morning sounding from OHX once again
shows good instability with steep mid-level lapse rates and
sufficient moisture. Given that there is so little shear, any
storms that eventually become strong to severe will be limited to
hail and gusty winds. High pressure continues to cover the
southeast U.S. this afternoon both at the surface and aloft. With
so little support aloft, cells today will be slow-movers, and
existing cells are exhibiting westward/southwestward propagation.
High pressure will remain the dominant feature across the region
for most of this week, and only when we get to Thursday and Friday
do we see the ridge start to break down. Both the GFS and Euro
bring a shortwave into the Great Plains on Thursday, and this
system will maintain its amplification as it moves eastward (as
opposed to getting washed out by the ridge). The upper trough will
move across Middle Tennessee around 00Z Sunday. Don't know that
we'll get an actual fropa at the surface, but POP's will increase
somewhat as we head toward next weekend. In the near term, look
for temperatures to level off beginning tomorrow with heat indices
generally topping out in the upper 90's. Given that the current
level of instability will remain with us for the foreseeable
future, scattered thunderstorms during peak-heating hours are
going to be a fixture this week. At this time, the SPC still only
shows general thunderstorms for Middle Tennessee on days 1-3, so
most of our storms should behave themselves. And no heat
advisories will be needed anytime soon.

&&

.AVIATION...
18Z TAF DISCUSSION.

Pattern to remain generally the same this taf cycle. Convection
largely isold-sct and diurnal in nature. Have included VCTS all
sites for possible storms but CSV in area of greatest expected
coverage this afternoon. Light pre-dawn fog very likely and have
included as well. May have to add brief TEMPO group for convection
later today.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      74  92  73  93  73 /  20  30  10  30  20
Clarksville    73  91  72  91  72 /  20  30  10  20  20
Crossville     69  86  68  85  68 /  20  30  20  30  20
Columbia       72  91  71  91  71 /  20  40  10  20  20
Lawrenceburg   71  90  70  90  70 /  20  40  20  20  20
Waverly        72  90  72  90  71 /  20  30  10  20  20

&&

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

&&

DISCUSSION......08
AVIATION........07

Hazardous weather outlook, Jun 17, 5:02 AM CDT, 11 hours 39 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
502 AM CDT Sun Jun 17 2018

TNZ005>011-023>034-056>066-075-077>080-093>095-181015-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-
Jackson-Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-
Maury-Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-
Coffee-Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
502 AM CDT Sun Jun 17 2018

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Heat index values will peak in the 98-103 degree range this
afternoon across much of Middle Tennessee west of the Cumberland
Plateau. Use caution if outdoors for long periods of time, as this
combination of heat and humidity can cause heat stroke and heat
exhaustion quickly.

Widely scattered thunderstorms are expected across Middle
Tennessee this afternoon, some of which could be strong to
possibly severe with large hail and damaging winds.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

Shamburger

In the hours before

Local storm report, Jun 17, 4:11 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
411 PM CDT SUN JUN 17 2018

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

0335 PM     TSTM WND DMG     BRENTWOOD               36.00N  86.79W
06/17/2018                   WILLIAMSON         TN   SOCIAL MEDIA

            TWITTER PICTURE OF TREE LIMB DOWN (POSSIBLE ON A CAR)
            NEAR OLD HICKORY BLVD AND NOLENSVILLE ROAD.

&&

EVENT NUMBER OHX1800154

FBORDEN

Special weather statement, Jun 17, 4:20 PM CDT, 21 minutes before

Special Weather Statement
National Weather Service Nashville TN
420 PM CDT SUN JUN 17 2018

TNZ008-172145-
Sumner TN-
420 PM CDT SUN JUN 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SUMNER COUNTY UNTIL 445
PM CDT...

At 420 PM CDT, Doppler radar was tracking a strong thunderstorm over
Gallatin, moving south at 10 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Gallatin, Hendersonville, Bledsoe Creek State Park and Cottontown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3649 8636 3636 8629 3635 8635 3636 8636
      3636 8637 3635 8638 3632 8661 3644 8658
TIME...MOT...LOC 2120Z 345DEG 8KT 3640 8645

13

Special weather statement, Jun 17, 4:23 PM CDT, 18 minutes before

Special Weather Statement
National Weather Service Nashville TN
423 PM CDT SUN JUN 17 2018

TNZ026-027-059-172215-
Williamson TN-Davidson TN-Cheatham TN-
423 PM CDT SUN JUN 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DAVIDSON...NORTH
CENTRAL WILLIAMSON AND SOUTH CENTRAL CHEATHAM COUNTIES UNTIL 515 PM
CDT...

At 423 PM CDT, the public reported a strong thunderstorm over Oak
Hill, or near Nashville, moving south southwest at 15 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Franklin, Nashville, Brentwood, Forest Hills, Oak Hill, Belle Meade,
Kingston Springs, Pegram, Bellevue, Antioch, Berry Hill, Bells Bend,
Natchez Trace At Highway 96 and Leipers Fork.

LAT...LON 3621 8672 3604 8665 3589 8700 3614 8711
TIME...MOT...LOC 2123Z 070DEG 12KT 3611 8678

FB

Local storm report, Jun 17, 4:28 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
428 PM CDT SUN JUN 17 2018

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

0410 PM     HAIL             DONELSON                36.16N  86.67W
06/17/2018  E0.50 INCH       DAVIDSON           TN   SOCIAL MEDIA

            TWITTER REPORT PEA SIZE HAIL.

&&

EVENT NUMBER OHX1800155

FBORDEN

Special weather statement, Jun 17, 4:31 PM CDT, 10 minutes before

Special Weather Statement
National Weather Service Nashville TN
431 PM CDT SUN JUN 17 2018

TNZ060-172215-
Maury TN-
431 PM CDT SUN JUN 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR MAURY COUNTY UNTIL 515 PM CDT...

At 430 PM CDT, Doppler radar was tracking a strong thunderstorm over
Columbia, moving south at 5 mph. Other storms were also detected
across Maury County.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Columbia, Spring Hill, Mount Pleasant, Santa Fe, Culleoka,
Williamsport and I-65 East Of Columbia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3576 8720 3573 8686 3544 8697 3549 8724
      3565 8729
TIME...MOT...LOC 2130Z 010DEG 5KT 3562 8710

13

Local storm report, Jun 17, 4:36 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
436 PM CDT SUN JUN 17 2018

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

0420 PM     HAIL             2 E INGLEWOOD           36.21N  86.69W
06/17/2018  E0.75 INCH       DAVIDSON           TN   SOCIAL MEDIA

            PEA TO DIME SIZE HAIL WITH 48 MPH WINDS AND 1.81 INCHES
            OF RAIN WITHIN 35 MINUTES. THIS OCCURRED IN THE OPRYLAND
            AREA.

&&

EVENT NUMBER OHX1800156

FBORDEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 7:07 PM CDT	Special Weather Statement	OHX	Davidson	53 min
Jun 16, 7:09 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	27 min
Jun 16, 7:27 PM CDT	Special Weather Statement	OHX	Van Buren	33 min
Jun 16, 7:31 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren	13 min
Jun 16, 8:16 PM CDT	Special Weather Statement	OHX	Van Buren	29 min
Jun 17, 2:22 PM CDT	Special Weather Statement	OHX	Cumberland	38 min
Jun 17, 3:14 PM CDT	Special Weather Statement	OHX	Williamson	46 min
Jun 17, 3:15 PM CDT	Special Weather Statement	OHX	Rutherford	30 min
Jun 17, 3:25 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	34 min
Jun 17, 3:47 PM CDT	Special Weather Statement	OHX	Williamson	43 min
Jun 17, 3:49 PM CDT	Special Weather Statement	OHX	Davidson	41 min
Jun 17, 3:58 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	27 min
Jun 17, 4:20 PM CDT	Special Weather Statement	OHX	Sumner	25 min
Jun 17, 4:22 PM CDT	Severe Thunderstorm Warning	OHX	Sumner, Wilson	23 min
Jun 17, 4:23 PM CDT	Special Weather Statement	OHX	Davidson	52 min
Jun 17, 4:31 PM CDT	Special Weather Statement	OHX	Maury	44 min
Jun 17, 4:56 PM CDT	Severe Thunderstorm Warning	OHX	Sumner	24 min
Jun 17, 5:19 PM CDT	Special Weather Statement	OHX	Macon, Smith, Trousdale	41 min
Jun 17, 5:32 PM CDT	Special Weather Statement	OHX	Cannon	28 min
Jun 17, 6:06 PM CDT	Special Weather Statement	OHX	DeKalb	24 min
Jun 17, 6:12 PM CDT	Special Weather Statement	OHX	Smith	33 min
Jun 17, 6:34 PM CDT	Special Weather Statement	OHX	Wilson	26 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2018 Every severe thunderstorm warning in 2018

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.