Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 99, NWS Nashville, TN

April 5, 2017Jackson County, Macon County, Smith County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 5, 2017, 4:36 PM CDT for Jackson County, Macon County, Smith County, Tennessee. It was in force for 24 min. 4 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: Apr 5, 2017, 4:36 PM CDT (21:36 UTC)
Expired: Apr 5, 2017, 5:00 PM CDT
In force: 24 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jackson County, TN, Macon County, TN, Smith County, TN

The radar

The Nashville radar (KOHX), 67 km from the middle of the area, began a volume at 21:38 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 5, 4:36 PM CDT	HAIL 1.75	6 W Gordonsville, TN
Apr 5, 4:40 PM CDT	HAIL 0.88	Carthage, TN	HAIL IS ONGOING
Apr 5, 4:40 PM CDT	HAIL 1	Carthage, TN	FACEBOOK IMAGE OF QUARTER SIZE HAIL
Apr 5, 4:44 PM CDT	HAIL 0.88	Carthage, TN	DIME TO NICKEL HAIL

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 0 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
Apr 5, 1:50 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.6 hours before the alert went out and 73 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.

901 
WUUS54 KOHX 052136
SVROHX
TNC087-111-159-052200-
/O.NEW.KOHX.SV.W.0099.170405T2136Z-170405T2200Z/

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

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Smith County in Middle Tennessee...
  Southwestern Jackson County in Middle Tennessee...
  Southeastern Macon County in Middle Tennessee...

* Until 500 PM CDT

* At 436 PM CDT, a severe thunderstorm was located 7 miles northeast
  of Watertown, or 8 miles southwest of Carthage, moving northeast at
  60 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...
  Carthage, Gainesboro, Gordonsville, Red Boiling Springs, South
  Carthage, Pleasant Shade and Granville.

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 3635 8555 3625 8578 3609 8605 3626 8612
      3653 8586
TIME...MOT...LOC 2136Z 219DEG 54KT 3618 8606 

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

Shamburger

2 follow-up statements

609 
WWUS54 KOHX 052146
SVSOHX

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

TNC087-111-159-052200-
/O.CON.KOHX.SV.W.0099.000000T0000Z-170405T2200Z/
Smith TN-Jackson TN-Macon TN-
446 PM CDT WED APR 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTHERN SMITH...SOUTHWESTERN JACKSON AND SOUTHEASTERN MACON
COUNTIES...

At 445 PM CDT, a severe thunderstorm was located near Carthage,
moving northeast at 60 mph.

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

SOURCE...Radar indicated. at 445 PM CDT, nickel size hail was 
         reported in Carthage. 

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

Locations impacted include...
Carthage, Gainesboro, Red Boiling Springs, South Carthage, Pleasant
Shade and Granville.

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 3635 8555 3620 8597 3631 8607 3653 8586
TIME...MOT...LOC 2145Z 220DEG 53KT 3630 8591 

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

Shamburger

744 
WWUS54 KOHX 052153
SVSOHX

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

TNC087-111-159-052202-
/O.EXP.KOHX.SV.W.0099.000000T0000Z-170405T2200Z/
Smith TN-Jackson TN-Macon TN-
453 PM CDT WED APR 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SMITH...SOUTHWESTERN
JACKSON AND SOUTHEASTERN MACON COUNTIES WILL EXPIRE AT 500 PM CDT...
        
A new warning has been issued for this storm which prompted the 
earlier warning.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
Smith, Jackson, Macon, and Clay Counties.

LAT...LON 3635 8555 3620 8597 3631 8607 3653 8586
TIME...MOT...LOC 2152Z 219DEG 54KT 3637 8584 

$$

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 Apr 5, 3:55 PM CDT, 41 minutes earlier.

Area forecast discussion, Apr 5, 3:55 PM CDT, 41 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, 11 hours 18 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

Special weather statement, Apr 5, 4:15 PM CDT, 21 minutes before

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

TNZ007>009-052145-
Robertson TN-Sumner TN-Macon TN-
415 PM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SUMNER...NORTHWESTERN MACON AND
SOUTHEASTERN ROBERTSON COUNTIES UNTIL 445 PM CDT...

At 414 PM CDT, Doppler radar was tracking a strong thunderstorm near
White House, or 8 miles west of Gallatin, moving northeast at 60 mph.

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

Locations impacted include...
Gallatin, Hendersonville, Goodlettsville, White House, Millersville,
Westmoreland, Cross Plains, Portland, Cottontown, Oak Grove and
Bethpage.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

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

LAT...LON 3663 8600 3632 8665 3646 8678 3665 8651
TIME...MOT...LOC 2114Z 228DEG 50KT 3641 8660

Shamburger

Local storm report, Apr 5, 4:25 PM CDT, 11 minutes before

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

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

0421 PM     HAIL             2 N MANCHESTER          35.50N  86.08W
04/05/2017  M0.88 INCH       COFFEE             TN   TRAINED SPOTTER

&&

EVENT NUMBER OHX1700388

JACKSON

Special weather statement, Apr 5, 4:27 PM CDT, 9 minutes before

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

TNZ009-010-029>031-052200-
Trousdale TN-Clay TN-Jackson TN-Macon TN-Smith TN-
427 PM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SMITH...NORTHWESTERN JACKSON...
NORTHWESTERN CLAY...EASTERN MACON AND SOUTHEASTERN TROUSDALE COUNTIES
UNTIL 500 PM CDT...

At 426 PM CDT, Doppler radar was tracking a strong thunderstorm near
Carthage, moving northeast at 50 mph.

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

Locations impacted include...
Carthage, Gordonsville, Red Boiling Springs, South Carthage,
Whitleyville, Dixon Springs and Pleasant Shade.

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

LAT...LON 3650 8553 3615 8602 3621 8610 3623 8611
      3623 8612 3624 8611 3628 8612 3631 8615
      3662 8588 3662 8571
TIME...MOT...LOC 2126Z 220DEG 42KT 3627 8605

Shamburger

Special weather statement, Apr 5, 4:29 PM CDT, 7 minutes before

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

TNZ009-028-030>032-064-052200-
Putnam TN-Wilson TN-De Kalb TN-Jackson TN-Macon TN-Smith TN-
429 PM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR SMITH...NORTHWESTERN DE KALB...
SOUTHWESTERN JACKSON...SOUTHEASTERN WILSON...SOUTHEASTERN MACON AND
WEST CENTRAL PUTNAM COUNTIES UNTIL 500 PM CDT...

At 428 PM CDT, Doppler radar was tracking a strong thunderstorm over
Watertown, or 13 miles southwest of Carthage, moving northeast at 60
mph.

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

Locations impacted include...
Carthage, Watertown, Gordonsville, Hickman, South Carthage,
Alexandria, Pleasant Shade and Granville.

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

LAT...LON 3626 8557 3598 8613 3609 8626 3649 8590
TIME...MOT...LOC 2128Z 217DEG 54KT 3611 8611

Shamburger

Local storm report, Apr 5, 4:31 PM CDT, 5 minutes before

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

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

0430 PM     HAIL             WATERTOWN               36.10N  86.14W
04/05/2017  E1.00 INCH       WILSON             TN   EMERGENCY MNGR

&&

EVENT NUMBER OHX1700389

JACKSON

Local storm report, Apr 5, 4:34 PM CDT, 2 minutes before

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

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

0426 PM     HAIL             3 N MANCHESTER          35.51N  86.08W
04/05/2017  M1.00 INCH       COFFEE             TN   EMERGENCY MNGR

&&

EVENT NUMBER OHX1700390

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, 4:47 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, 5:22 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, DeKalb, Warren, White	23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.