Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 103, NWS Nashville, TN

April 5, 20175 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 5, 2017, 5:22 PM CDT for 5 counties in Tennessee. It was in force for 23 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: Apr 5, 2017, 5:22 PM CDT (22:22 UTC)
Expired: Apr 5, 2017, 5:45 PM CDT
In force: 23 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Cannon County, TN, Coffee County, TN, DeKalb County, TN, Warren County, TN, White County, TN

The radar

The Nashville radar (KOHX), 94 km from the middle of the area, began a volume at 22:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 5, 1:50 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.4 hours before the alert went out and 91 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: 1902 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

085 
WUUS54 KOHX 052222
SVROHX
TNC015-031-041-177-185-052245-
/O.NEW.KOHX.SV.W.0103.170405T2222Z-170405T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
522 PM CDT WED APR 5 2017

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southeastern De Kalb County in Middle Tennessee...
  Northeastern Coffee County in Middle Tennessee...
  Warren County in Middle Tennessee...
  Southwestern White County in Middle Tennessee...
  Southeastern Cannon County in Middle Tennessee...

* Until 545 PM CDT

* At 522 PM CDT, a severe thunderstorm was located 9 miles west of
  McMinnville, moving northeast at 50 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...
  McMinnville, Smithville, Morrison, Centertown, Rock Island State
  Park and Summitville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 900 PM CDT for Middle
Tennessee.

LAT...LON 3561 8612 3598 8577 3581 8554 3580 8556
      3581 8557 3580 8559 3581 8560 3580 8560
      3578 8561 3578 8560 3576 8560 3576 8561
      3549 8597
TIME...MOT...LOC 2222Z 223DEG 41KT 3566 8594 

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

10

2 follow-up statements

882 
WWUS54 KOHX 052230
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
530 PM CDT WED APR 5 2017

TNC015-031-185-052239-
/O.CAN.KOHX.SV.W.0103.000000T0000Z-170405T2245Z/
Coffee TN-White TN-Cannon TN-
530 PM CDT WED APR 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COFFEE...
SOUTHWESTERN WHITE AND SOUTHEASTERN CANNON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area therefore the warning has been cancelled.

A tornado watch remains in effect until 900 PM CDT for Middle
Tennessee.

LAT...LON 3566 8599 3571 8600 3573 8599 3583 8590
      3583 8588 3584 8589 3598 8577 3587 8565
      3585 8567 3585 8563 3583 8565 3583 8568
      3582 8565 3582 8564 3563 8591
TIME...MOT...LOC 2229Z 223DEG 41KT 3573 8587 

$$

TNC041-177-052245-
/O.CON.KOHX.SV.W.0103.000000T0000Z-170405T2245Z/
De Kalb TN-Warren TN-
530 PM CDT WED APR 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN DE KALB AND NORTHWESTERN WARREN COUNTIES...

At 529 PM CDT, a severe thunderstorm was located near McMinnville,
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...
McMinnville, Smithville and Centertown. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 900 PM CDT for Middle
Tennessee.

LAT...LON 3566 8599 3571 8600 3573 8599 3583 8590
      3583 8588 3584 8589 3598 8577 3587 8565
      3585 8567 3585 8563 3583 8565 3583 8568
      3582 8565 3582 8564 3563 8591
TIME...MOT...LOC 2229Z 223DEG 41KT 3573 8587 

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

10

904 
WWUS54 KOHX 052239
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
539 PM CDT WED APR 5 2017

TNC041-177-052248-
/O.EXP.KOHX.SV.W.0103.000000T0000Z-170405T2245Z/
De Kalb TN-Warren TN-
539 PM CDT WED APR 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DE KALB AND
NORTHWESTERN WARREN COUNTIES WILL EXPIRE AT 545 PM CDT...
                
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 will be allowed to expire.  However small hail
is still possible with this thunderstorm.

A tornado watch remains in effect until 900 PM CDT for Middle
Tennessee.

LAT...LON 3566 8599 3571 8600 3573 8599 3583 8590
      3583 8588 3584 8589 3598 8577 3587 8565
      3585 8567 3585 8563 3583 8565 3583 8568
      3582 8565 3582 8564 3563 8591
TIME...MOT...LOC 2238Z 223DEG 41KT 3580 8580 

$$

10

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 5, 3:55 PM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, Apr 5, 3:55 PM CDT, 1 hour 27 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
355 PM CDT Wed Apr 5 2017

.DISCUSSION...

Afternoon storms have been slower to develop this afternoon with
the anticipated increase in low level moisture occurring slower
than originally forecast. However, dewpoints have crept up and
storms have been increasing since 19-20Z. Expect this trend to
continue for the next few hours with the bulk of the storms east
of I-65 and becoming especially numerous on the Plateau. Severe
storm potential will end this evening but wrap-around showers will
arrive late tonight and then continue beyond 12Z Thursday.

The upper level low that helped kick off today's storms will move
from the Mid/Upper MS Valley to the lower Great Lakes Thursday.
Thursday will be much cooler with post frontal conditions and
extensive clouds in the cyclonic flow aloft...although some
decrease in clouds should occur by afternoon. Clearing skies
Thursday night will help allow temps to drop into the 30s most
areas. Light winds should help prevent any frost Thursday
night...but do expect patches of frost across the mid state Friday
morning as cold air remains and sfc winds drop off.

Upper level ridging will keep it dry Friday through the weekend
and into Monday with daytime temperature rebounding into the 60s
and then 70s.

The next upper level system to impact Middle TN will move eastward
through the Northern Plains early next week. This system and a
weak cold front will bring a chance of showers to the region
Monday night into next Wednesday.

&&

.AVIATION...
18Z TAF DISCUSSION.

Band of strong afternoon/early evening storms, followed by dry
period, then wrap-around dz-/rw- on tap this period. Outside
of convection early through 06z, largely expect VFR conditions.
After 06z, upper low will wrap-around light precip and cigs
expected to drop all sites overnight but possibly improve by
18z Thu. Winds will be quite gusty through the period...sometimes
25-35mph.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      44  58  39  59  36 /  50  50   0   0   0
Clarksville    43  57  37  58  35 /  60  50   0   0   0
Crossville     40  49  35  51  33 /  70  70  20  10   0
Columbia       44  58  38  60  35 /  50  50   0   0   0
Lawrenceburg   44  58  38  59  35 /  50  40   0   0   0
Waverly        43  59  39  59  37 /  60  50   0   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Wind Advisory until 7 AM CDT Thursday FOR Bedford-Cannon-
Cheatham-Clay-Coffee-Cumberland-Davidson-De Kalb-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.

&&

DISCUSSION......49
AVIATION........07

Hazardous weather outlook, Apr 5, 5:18 AM CDT, 12 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
518 AM CDT Wed Apr 5 2017

TNZ005>011-023>034-056>066-075-077>080-093>095-061000-
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-
518 AM CDT Wed Apr 5 2017

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...Today and Tonight

Some strong to severe thunderstorms will be possible
this afternoon through the early evening hours, especially
for locations east of I-65. Main concerns with any strong
to severe thunderstorms that do develop will be large hail,
damaging winds, and the formation of tornadoes.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon
and early evening.

Spotter Thunderstorm Reporting Criteria
Tornado
Funnel Cloud
Flooding
Hail >= 1/2 inch
Winds > 50 MPH (Measured)
Structural Damage
Trees or Power Lines Down

31

In the hours before

Local storm report, Apr 5, 5:07 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
507 PM CDT WED APR 05 2017

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

0507 PM     HAIL             MANCHESTER              35.47N  86.08W
04/05/2017  E1.00 INCH       COFFEE             TN   EMERGENCY MNGR

            NICKEL TO QUARTER SIZE HAIL ONGOING

&&

EVENT NUMBER OHX1700399

JACKSON

Local storm report, Apr 5, 5:12 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
512 PM CDT WED APR 05 2017

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

0330 PM     HAIL             GREENBRIER              36.42N  86.80W
04/05/2017  E0.88 INCH       ROBERTSON          TN   FACEBOOK

&&

EVENT NUMBER OHX1700400

JACKSON

Local storm report, Apr 5, 5:13 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
513 PM CDT WED APR 05 2017

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

0440 PM     HAIL             CARTHAGE                36.26N  85.94W
04/05/2017  M1.00 INCH       SMITH              TN   FACEBOOK

            FACEBOOK IMAGE OF QUARTER SIZE HAIL

&&

EVENT NUMBER OHX1700401

JACKSON

Special weather statement, Apr 5, 5:14 PM CDT, 8 minutes before

Special Weather Statement
National Weather Service Nashville TN
514 PM CDT WED APR 5 2017

TNZ009-010-029>031-052245-
Trousdale TN-Clay TN-Jackson TN-Macon TN-Smith TN-
514 PM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SMITH...NORTHERN
JACKSON...WEST CENTRAL CLAY...EASTERN MACON AND CENTRAL TROUSDALE
COUNTIES UNTIL 545 PM CDT...

At 514 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hartsville, moving northeast at 65 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lafayette, Carthage, Hartsville, Red Boiling Springs, South Carthage,
Whitleyville, Bugtussle, Dixon Springs and Pleasant Shade.

A tornado watch remains in effect until 900 PM CDT for Middle
Tennessee.

LAT...LON 3662 8580 3643 8554 3621 8603 3636 8619
      3663 8591
TIME...MOT...LOC 2214Z 224DEG 59KT 3634 8606

Shamburger

Local storm report, Apr 5, 5:16 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
516 PM CDT WED APR 05 2017

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

0513 PM     FUNNEL CLOUD     10 SE MANCHESTER        35.37N  85.96W
04/05/2017                   COFFEE             TN   911 CALL CENTER

            MULTIPLE PUBLIC REPORTS OF A FUNNEL CLOUD

&&

EVENT NUMBER OHX1700402

JACKSON

Local storm report, Apr 5, 5:19 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NASHVILLE TN
519 PM CDT WED APR 05 2017

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

0503 PM     FUNNEL CLOUD     10 SE MCMINNVILLE       35.59N  85.65W
04/05/2017                   WARREN             TN   911 CALL CENTER

            MULTIPLE PUBLIC REPORTS OF A FUNNEL CLOUD

&&

CORRECTED EVENT TIME...COUNTY/STATE...LOCATION

EVENT NUMBER OHX1700402

JACKSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 3:39 PM CDT	Special Weather Statement	OHX	Sumner	36 min
Apr 5, 3:51 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee	39 min
Apr 5, 3:54 PM CDT	Special Weather Statement	OHX	Robertson	21 min
Apr 5, 4:02 PM CDT	Wind Advisory	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	29 hr
Apr 5, 4:10 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Wilson	35 min
Apr 5, 4:15 PM CDT	Special Weather Statement	OHX	Sumner	30 min
Apr 5, 4:18 PM CDT	Tornado Warning	OHX	Coffee	27 min
Apr 5, 4:27 PM CDT	Special Weather Statement	OHX	Smith	33 min
Apr 5, 4:29 PM CDT	Special Weather Statement	OHX	Smith	31 min
Apr 5, 4:29 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Warren	46 min
Apr 5, 4:36 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Macon, Smith	24 min
Apr 5, 4:47 PM CDT	Special Weather Statement	OHX	Trousdale	28 min
Apr 5, 4:51 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Smith	24 min
Apr 5, 4:54 PM CDT	Tornado Warning	OHX	Grundy, Van Buren, Warren	36 min
Apr 5, 4:59 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Warren	31 min
Apr 5, 5:06 PM CDT	Special Weather Statement	OHX	Putnam	24 min
Apr 5, 5:10 PM CDT	Tornado Warning	OHX	Putnam	21 min
Apr 5, 5:12 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon	33 min
Apr 5, 5:14 PM CDT	Special Weather Statement	OHX	Macon, Smith	31 min
Apr 5, 5:26 PM CDT	Tornado Warning	OHX	Overton, Putnam	18 min
Apr 5, 5:38 PM CDT	Special Weather Statement	OHX	DeKalb	37 min
Apr 5, 5:41 PM CDT	Special Weather Statement	OHX	Grundy, Van Buren	49 min
Apr 5, 5:46 PM CDT	Special Weather Statement	OHX	Cannon, DeKalb	44 min
Apr 5, 5:55 PM CDT	Special Weather Statement	OHX	Grundy	35 min
Apr 5, 5:58 PM CDT	Special Weather Statement	OHX	Overton	32 min
Apr 5, 6:08 PM CDT	Special Weather Statement	OHX	Fentress, Overton, Pickett, Putnam	37 min
Apr 5, 6:12 PM CDT	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Overton, Putnam	33 min
Apr 5, 6:42 PM CDT	Special Weather Statement	OHX	Overton	48 min
Apr 5, 6:58 PM CDT	Special Weather Statement	OHX	White	32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.