Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 82, NWS Nashville, TN

March 27, 20174 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 27, 2017, 4:14 PM CDT for 4 counties in Tennessee. It was in force for 31 min. 2 reports 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 27, 2017, 4:14 PM CDT (21:14 UTC)
Expired: Mar 27, 2017, 4:45 PM CDT
In force: 31 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Macon County, TN, Sumner County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 33 km from the middle of the area, began a volume at 21:15 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 27, 4:25 PM CDT	TSTM WND DMG	Gallatin, TN	LARGE TREES DOWN IN GALLATIN. REPORT VIA WSMV TV.
Mar 27, 4:33 PM CDT	TSTM WND DMG	2 Ene Westmoreland, TN	A COUPLE OF TREES WERE DOWN ON EPPERSON SPRINGS RD.

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 2 storm reports to this severe thunderstorm warning; the first came 11 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 27, 2:24 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.2 hours before the alert went out and 47 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: 48 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1296 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS54 KOHX 272114
SVROHX
TNC111-165-169-189-272145-
/O.NEW.KOHX.SV.W.0082.170327T2114Z-170327T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
414 PM CDT MON MAR 27 2017

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Sumner County in Middle Tennessee...
  Northwestern Wilson County in Middle Tennessee...
  Southwestern Macon County in Middle Tennessee...
  Northwestern Trousdale County in Middle Tennessee...

* Until 445 PM CDT

* At 413 PM CDT, a severe thunderstorm was located near Gallatin,
  moving northeast at 45 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...
  Gallatin, Lafayette, Hendersonville, Mount Juliet, Goodlettsville,
  White House, Millersville, Westmoreland, Portland, Mitchellville,
  Bethpage, Oak Grove, Bledsoe Creek State Park and Cottontown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3665 8633 3652 8601 3622 8651 3634 8671
      3657 8661 3664 8655 3665 8651
TIME...MOT...LOC 2113Z 228DEG 39KT 3634 8653 

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

Shamburger

3 follow-up statements

250 
WWUS54 KOHX 272119
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
419 PM CDT MON MAR 27 2017

TNC111-165-169-189-272145-
/O.CON.KOHX.SV.W.0082.000000T0000Z-170327T2145Z/
Sumner TN-Wilson TN-Macon TN-Trousdale TN-
419 PM CDT MON MAR 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SUMNER...NORTHWESTERN WILSON...SOUTHWESTERN MACON AND
NORTHWESTERN TROUSDALE COUNTIES...

At 418 PM CDT, a severe thunderstorm was located over Gallatin,
moving northeast at 50 mph.

HAZARD...70 mph wind gusts and quarter size hail. 

SOURCE...Emergency Management. Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings. 

Locations impacted include...
Gallatin, Lafayette, Hendersonville, Mount Juliet, Goodlettsville,
White House, Millersville, Westmoreland, Portland, Mitchellville,
Bethpage, Oak Grove, Bledsoe Creek State Park and Cottontown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. This storm has a history of large 
hail in Millersville, and causing wind damage in Nashville. SEEK 
SHELTER NOW inside a sturdy structure and stay away from windows.

&&

LAT...LON 3665 8633 3652 8601 3622 8651 3634 8671
      3657 8661 3664 8655 3665 8651
TIME...MOT...LOC 2118Z 226DEG 43KT 3640 8646 

HAIL...1.00IN
WIND...70MPH
 
$$

Shamburger

979 
WWUS54 KOHX 272128
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
428 PM CDT MON MAR 27 2017

TNC111-165-169-189-272145-
/O.CON.KOHX.SV.W.0082.000000T0000Z-170327T2145Z/
Sumner TN-Wilson TN-Macon TN-Trousdale TN-
428 PM CDT MON MAR 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SUMNER...NORTH CENTRAL WILSON...SOUTHWESTERN MACON AND
NORTHWESTERN TROUSDALE COUNTIES...

At 427 PM CDT, a severe thunderstorm was located near Gallatin, 
moving northeast at 45 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...
Gallatin, Lafayette, White House, Westmoreland, Portland,
Mitchellville, Cottontown, Bethpage, Oak Grove and Bledsoe Creek
State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3665 8633 3652 8601 3629 8640 3642 8663
      3664 8655 3665 8651
TIME...MOT...LOC 2127Z 228DEG 39KT 3647 8636 

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

Shamburger

300 
WWUS54 KOHX 272139
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
439 PM CDT MON MAR 27 2017

TNC111-165-169-189-272148-
/O.EXP.KOHX.SV.W.0082.000000T0000Z-170327T2145Z/
Sumner TN-Wilson TN-Macon TN-Trousdale TN-
439 PM CDT MON MAR 27 2017

...THE SEVERE THUNDERSTORM WARNING FOR SUMNER...NORTH CENTRAL
WILSON...SOUTHWESTERN MACON AND NORTHWESTERN TROUSDALE COUNTIES WILL
EXPIRE AT 445 PM CDT...
        
The storm which prompted the warning has been replaced with a new 
Severe Thunderstorm Warning.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
Middle Tennessee.

Remember, a Severe Thunderstorm Warning still remains in effect for
Sumner, Trousdale, and Macon Counties.

LAT...LON 3665 8633 3652 8601 3629 8640 3642 8663
      3664 8655 3665 8651
TIME...MOT...LOC 2138Z 228DEG 39KT 3654 8626 

$$

Shamburger

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 27, 3:01 PM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Mar 27, 3:01 PM CDT, 1 hour 13 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
301 PM CDT Mon Mar 27 2017

.DISCUSSION...

Numerous thunderstorms have moved into our western counties,
including a few likely severe storms with radar indicating large
hail. Afternoon analysis indicates dew points around 60, capes
near 1500 J/kg, and low level SRH just over 200. That is enough to
get some rotation within the individual storms, which supports
large hail and localized damaging winds. Although the potential
for tornadoes is relatively low, we will need to monitor these
rotating storms closely for localized spin up potential. These
thunderstorms will continue to move eastward across the Mid STate
through the next few hours. HRRR model indicates additional
thunderstorms, currently forming farther west along the Ms River,
will consolidate into a line and sweep through this evening with
possible strong winds. Timing of this line is estimated to be at
CKV around 6 PM, BNA by 8 PM, and 10 PM for the Plateau.

Many areas will have more than 1 inch of rainfall through tonight,
with some locally heavier amounts possible. A few localized flash
flood warnings are possible.

A few showers will linger into Tuesday morning. Otherwise, upper
ridging will build in Tuesday and Wednesday. Temperatures will be
warm. Lingering cloudiness on Tuesday will only allow low to mid
70s, but more sun and rising heights Wednesday will allow highs
near 80.

A strengthening low pressure system over the Plains will bring our
next chance of thunderstorms by Thursday. This looks like another
potentially severe thunderstorm day as low level moisture and
southerly flow increases ahead of an approaches cold front.
Thunderstorms chances will stay in the forecast from Thursday
through Friday.

Saturday and Sunday look pretty good at this time. The next system
with more showers and storms is set to roll in next Monday or
Tuesday.

&&

.AVIATION...
18Z TAF DISCUSSION.

Numerous showers/storms will affect airports this TAF period
especially later this afternoon/evening. MVFR cigs/vis anticipated
with lower categories and amendments possible. Gusty south to
southwest winds this afternoon will weaken and veer to
west/northwest late in the TAF period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      58  72  52  78  58 / 100  10  10   0  20
Clarksville    55  69  52  74  57 /  90  10  10  10  20
Crossville     57  69  50  74  55 /  90  20  10   0  10
Columbia       59  72  52  78  58 / 100  10  10  20  10
Lawrenceburg   59  73  52  79  58 / 100  10  10  20  10
Waverly        56  70  52  76  59 /  90  10  10  10  20

&&

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

&&

DISCUSSION......13
AVIATION........Shamburger

Hazardous weather outlook, Mar 27, 5:21 AM CDT, 10 hours 53 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
521 AM CDT Mon Mar 27 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-281030-
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-
521 AM CDT Mon Mar 27 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Strong to severe thunderstorms are possible this afternoon and
evening across all of Middle Tennessee. The greatest chance for
severe storms however remains along and west of I-65. Damaging
straight line winds and hail are the main threats. An isolated
brief tornado is possible as well.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Another round of strong to severe storms is possible in Middle
Tennessee on Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be necessary this afternoon and again on
Thursday.

In the hours before

Special weather statement, Mar 27, 3:21 PM CDT, 53 minutes before

Special Weather Statement
National Weather Service Nashville TN
321 PM CDT MON MAR 27 2017

TNZ060-061-094-095-272115-
Lawrence TN-Maury TN-Giles TN-Marshall TN-
321 PM CDT MON MAR 27 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARSHALL...MAURY...
LAWRENCE AND GILES COUNTIES UNTIL 415 PM CDT...

At 321 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Columbia to Lexington. Movement was east
at 35 mph.

Dime size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Columbia, Lewisburg, Lawrenceburg, Pulaski, Spring Hill, Mount
Pleasant, Loretto, Ardmore, Cornersville, St. Joseph, Elkton, Minor
Hill, Ethridge, Lynnville, Culleoka, I-65 East Of Columbia,
Goodspring, Leoma, Westpoint and Frankewing.

A severe thunderstorm watch also remains in effect until 1000 PM CDT
for Middle Tennessee.

LAT...LON 3501 8761 3504 8758 3511 8759 3547 8728
      3568 8730 3572 8682 3570 8677 3571 8669
      3526 8683 3499 8685
TIME...MOT...LOC 2021Z 260DEG 28KT 3566 8709 3504 8729

Shamburger

Local storm report, Mar 27, 4:04 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
404 PM CDT MON MAR 27 2017

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

0401 PM     HAIL             MILLERSVILLE            36.38N  86.70W
03/27/2017  E1.00 INCH       SUMNER             TN   TWITTER

&&

EVENT NUMBER OHX1700328

ROSE

Local storm report, Mar 27, 4:05 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
405 PM CDT MON MAR 27 2017

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

0339 PM     TSTM WND DMG     1 NE BELLE MEADE        36.11N  86.84W
03/27/2017                   DAVIDSON           TN   EMERGENCY MNGR

            TREE DOWN ON ABBOT MARTIN RD.

&&

EVENT NUMBER OHX1700329

MR3

Local storm report, Mar 27, 4:08 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
408 PM CDT MON MAR 27 2017

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

0339 PM     TSTM WND DMG     1 E BELLE MEADE         36.10N  86.84W
03/27/2017                   DAVIDSON           TN   EMERGENCY MNGR

            TREE DOWN AT HARDING PLACE AND NORTHUMBERLAND

&&

EVENT NUMBER OHX1700330

MR3

Local storm report, Mar 27, 4:11 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
411 PM CDT MON MAR 27 2017

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

0402 PM     HAIL             WHITE HOUSE             36.46N  86.67W
03/27/2017  E0.88 INCH       ROBERTSON          TN   TRAINED SPOTTER

            NICKEL SIZE HAIL REPORTED ON THE SOUTH SIDE OF WHITE
            HOUSE.

&&

EVENT NUMBER OHX1700331

MR3

Local storm report, Mar 27, 4:12 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
412 PM CDT MON MAR 27 2017

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

0401 PM     HAIL             MILLERSVILLE            36.38N  86.70W
03/27/2017  M1.75 INCH       SUMNER             TN   TWITTER

&&

EVENT NUMBER OHX1700332

ROSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 1:43 PM CDT	Special Weather Statement	OHX	Stewart	47 min
Mar 27, 1:56 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	49 min
Mar 27, 2:16 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	29 min
Mar 27, 2:39 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Montgomery, Stewart	36 min
Mar 27, 3:13 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Robertson, Williamson	62 min
Mar 27, 3:17 PM CDT	Special Weather Statement	OHX	Dickson, Houston, Montgomery	28 min
Mar 27, 3:21 PM CDT	Special Weather Statement	OHX	Giles, Lawrence, Marshall, Maury	54 min
Mar 27, 3:36 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	24 min
Mar 27, 3:39 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Marshall	36 min
Mar 27, 3:52 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner, Wilson	23 min
Mar 27, 3:55 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Marshall, Rutherford, Williamson	35 min
Mar 27, 4:19 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Sumner, Williamson, Wilson	26 min
Mar 27, 4:29 PM CDT	Special Weather Statement	OHX	Overton, Putnam	46 min
Mar 27, 4:38 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	37 min
Mar 27, 4:42 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren, Warren	48 min
Mar 27, 4:45 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys	30 min
Mar 27, 5:02 PM CDT	Special Weather Statement	OHX	Clay, Jackson, Overton, Pickett	43 min
Mar 27, 5:11 PM CDT	Special Weather Statement	OHX	Clay, Jackson	49 min
Mar 27, 5:15 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	30 min
Mar 27, 5:25 PM CDT	Severe Thunderstorm Warning	OHX	Perry	50 min
Mar 27, 5:31 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	29 min
Mar 27, 5:39 PM CDT	Tornado Warning	OHX	Perry, Wayne	25 min
Mar 27, 5:45 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Maury, Williamson	45 min
Mar 27, 6:01 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery	16 min
Mar 27, 6:02 PM CDT	Tornado Warning	OHX	Hickman, Lewis, Perry	28 min
Mar 27, 6:12 PM CDT	Areal Flood Advisory	OHX	Perry	2 hr
Mar 27, 6:28 PM CDT	Tornado Warning	OHX	Hickman, Lewis, Maury	32 min
Mar 27, 6:43 PM CDT	Tornado Warning	OHX	Wayne	32 min
Mar 27, 6:55 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Marshall, Maury, Williamson	50 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2017 Every severe thunderstorm warning in 2017

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.