Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 99, NWS Nashville, TN

May 3, 20208 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 3, 2020, 5:06 PM CDT for 8 counties in Tennessee. It was in force for 39 min. 3 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: May 3, 2020, 5:06 PM CDT (22:06 UTC)
Expired: May 3, 2020, 5:45 PM CDT
In force: 39 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Bedford County, TN, Cannon County, TN, Coffee County, TN, Giles County, TN, Grundy County, TN, Marshall County, TN, Rutherford County, TN, Warren County, TN

The radar

The Northeast Alabama radar (KHTX), 51 km from the middle of the area, began a volume at 22:07 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
May 3, 5:17 PM CDT	TSTM WND DMG	Tullahoma, TN	MULTIPLE TREES DOWN IN TULLAHOMA
May 3, 5:40 PM CDT	TSTM WND DMG	Altamont, TN	TREES BLOWN DOWN IN FRONT OF THE COURTHOUSE
May 3, 5:45 PM CDT	TSTM WND DMG	Monteagle, TN	MULTIPLE TREES DOWN NEAR MONTEAGLE

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 3 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
May 3, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.1 hours before the alert went out and 90 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: 1582 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 201 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.

557 
WUUS54 KOHX 032206
SVROHX
TNC003-015-031-055-061-117-149-177-032245-
/O.NEW.KOHX.SV.W.0099.200503T2206Z-200503T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
506 PM CDT Sun May 3 2020

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Southeastern Marshall County in Middle Tennessee...
  Southeastern Rutherford County in Middle Tennessee...
  Southern Warren County in Middle Tennessee...
  Coffee County in Middle Tennessee...
  East central Giles County in Middle Tennessee...
  Bedford County in Middle Tennessee...
  Grundy County in Middle Tennessee...
  Southwestern Cannon County in Middle Tennessee...

* Until 545 PM CDT.

* At 506 PM CDT, severe thunderstorms were located along a line
  extending from 10 miles south of Murfreesboro to near Shelbyville
  to 9 miles west of Fayetteville, moving southeast at 70 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Shelbyville, Manchester, Tullahoma, Gruetli-Laager, Tracy City,
  Monteagle, Altamont, Coalmont, Morrison, Palmer, Wartrace, Bell
  Buckle, Beersheba Springs, Normandy, Viola, Beechgrove, Raus,
  Fosterville, Frankewing and Christiana.

This includes the following highways...
 Interstate 65 between mile markers 15 and 20.
 Interstate 24 between mile markers 86 and 136.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage. SEEK SHELTER NOW inside a sturdy structure and stay 
away from windows! 

&&

LAT...LON 3524 8695 3554 8653 3577 8639 3555 8556
      3553 8561 3541 8549 3529 8571 3522 8574
      3522 8587 3534 8603 3534 8626 3539 8628
      3541 8625 3541 8626 3532 8642 3537 8660
      3525 8675 3526 8683 3517 8683
TIME...MOT...LOC 2206Z 299DEG 61KT 3572 8633 3549 8640 3519 8673 

HAIL...0.75IN
WIND...70MPH
 
$$

Whitehead

1 follow-up statement

380 
WWUS54 KOHX 032234
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
534 PM CDT Sun May 3 2020

TNC003-015-055-117-149-032244-
/O.CAN.KOHX.SV.W.0099.000000T0000Z-200503T2245Z/
Marshall TN-Rutherford TN-Giles TN-Bedford TN-Cannon TN-
534 PM CDT Sun May 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARSHALL...
SOUTHEASTERN RUTHERFORD...EAST CENTRAL GILES...BEDFORD AND
SOUTHWESTERN CANNON COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
Middle Tennessee.

LAT...LON 3524 8582 3522 8587 3529 8592 3532 8600
      3534 8603 3536 8616 3535 8616 3534 8619
      3534 8626 3535 8624 3537 8627 3538 8625
      3539 8628 3566 8598 3555 8556 3553 8561
      3541 8550 3529 8571 3522 8574 3522 8578
TIME...MOT...LOC 2234Z 299DEG 61KT 3550 8586 3527 8593 3497 8626 

$$

TNC031-061-177-032245-
/O.CON.KOHX.SV.W.0099.000000T0000Z-200503T2245Z/
Warren TN-Coffee TN-Grundy TN-
534 PM CDT Sun May 3 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN WARREN...COFFEE AND GRUNDY COUNTIES...

At 534 PM CDT, severe thunderstorms were located along a line
extending from 12 miles east of Manchester to near Monteagle to near
Huntland, moving southeast at 70 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Manchester, Tullahoma, Gruetli-Laager, Tracy City, Monteagle,
Altamont, Coalmont, Morrison, Palmer, Beersheba Springs, Viola,
Summitville, Hillsboro, Pelham, Arnold AFB and Fiery Gizzard State
Park.

This includes Interstate 24 between mile markers 108 and 135.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3524 8582 3522 8587 3529 8592 3532 8600
      3534 8603 3536 8616 3535 8616 3534 8619
      3534 8626 3535 8624 3537 8627 3538 8625
      3539 8628 3566 8598 3555 8556 3553 8561
      3541 8550 3529 8571 3522 8574 3522 8578
TIME...MOT...LOC 2234Z 299DEG 61KT 3550 8586 3527 8593 3497 8626 

HAIL...0.75IN
WIND...60MPH
 
$$

Whitehead

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 May 3, 2:17 PM CDT, 2 hours 49 minutes earlier.

Area forecast discussion, May 3, 2:17 PM CDT, 2 hours 49 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
217 PM CDT Sun May 3 2020

.DISCUSSION...

Bowing line of thunderstorms currently pushing across the MO
bootheel. This activity will be reaching the northwestern extremes
of middle TN between 3 pm and 4 pm. The atmosphere across the mid
state is quite unstable with dewpoints now well into the 60s and sfc
capes around 2000 j/kg in our northwest. There is a warm layer
around 700 mb but caps are diminishing with time, especially north
of I-40. Additional partial development will be possible ahead of
the main line of advancing storms. It will however take a little
longer for that activity to commence. The threat of severe weather
is due primarily to the advancing line of storms and a severe tstm
watch is in effect until 6 PM for our northwest. This line may need
to be extended eastward later. Large hail and damaging winds are the
threats for this afternoon. Otw, average qpf amounts tonight will
average around one half inch. However, some cell training will
produce some locally heavier amounts of an inch or so.

Moving on, boundary will push south overnight. The better
instability zone will switch to south of us on Monday. And with
little forcing, I am not seeing much during the day.

Monday night, a warm front will be lifting northward. Instabilities
will begin to increase and we could see a few strong storms west of
I-65 at that time. During the day Tuesday, the sfc low will move
eastward across KY with instability increasing to the east of I-65
as the day progresses. It looks as though strong storms will again
be possible, mainly east of I-65 on Tuesday afternoon. This will be
in advance of the main cold frontal passage.

Near term temps, looking rather warm, particularly our overnight
lows which will be in the lower 60s. Cooler Tuesday night behind the
aforementioned fropa.

In the ext fcst, showers are possible in our east on Wednesday.
Models are rather peculiar at that time as they try to strum up sfc
instability with a northerly sfc fetch. Not buying it so will
exclude thunder. Following this, models are leaning toward a Gulf
system by late week with rain showers returning.

For the ext temps, its looking below normal with highs, for Thursday
on, mostly in the 60s. And just to serve notice, the 6-10 day
outlook reflects well below normal temperatures. Could be some frost
advisory perhaps in our future? We shall see.

&&

.AVIATION...
18Z TAF DISCUSSION.

VFR conditions expected for most of this TAF cycle, but a cluster
of +TSRA headed towards Middle TN will bring IFR to LIFR
conditions with very gusty west winds this afternoon/early
evening. While each terminal is expected to get a couple hour
break where VFR could return this evening, additional TS are
expected throughout the evening, with degraded conditions for the
rest of the night.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      60  77  62  78  49 /  70  20  70  40  30
Clarksville    55  76  59  75  48 /  70  30 100  30  10
Crossville     57  72  58  76  48 /  70  20  90  90  30
Columbia       62  79  64  79  49 /  60  30  30  30  20
Lawrenceburg   63  78  64  81  50 /  50  30  30  40  30
Waverly        57  77  61  76  48 /  70  30  80  30  10

&&

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

&&

DISCUSSION......21
AVIATION........Unger

Hazardous weather outlook, May 3, 5:12 AM CDT, 11 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
512 AM CDT Sun May 3 2020

TNZ005>011-023>034-056>066-075-077>080-093>095-041015-
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-
512 AM CDT Sun May 3 2020

This Hazardous Weather Outlook is for portions of Middle Tennessee.

.DAY ONE...Today and Tonight.

Strong to severe thunderstorms will be possible in the afternoon and
evening today. Main threat if any strong storms develop will be
damaging winds and hail, along with isolated flash flooding possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Strong to severe thunderstorms will be possible again during the
afternoon and evening on Monday across the mid state, with main
threats being hail and damaging winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

In the hours before

Local storm report, May 3, 4:40 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
440 PM CDT SUN MAY 03 2020

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

0430 PM     TSTM WND DMG     COLUMBIA                35.62N  87.05W
05/03/2020                   MAURY              TN   AMATEUR RADIO

            TREES DOWN IN COLUMBIA...POWER OUT ACROSS MUCH OF THE
            COUNTY.

&&

EVENT NUMBER OHX2000340

21

Local storm report, May 3, 4:49 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
449 PM CDT SUN MAY 03 2020

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

0435 PM     TSTM WND DMG     BRENTWOOD               36.00N  86.79W
05/03/2020                   WILLIAMSON         TN   TRAINED SPOTTER

            MULTIPLE LARGE TREES DOWN 1 MILE NORTH OF CONCORD RD
            AND WILSON PIKE INTERSECTION. 1 TREE FELL ON A DOG
            KENNEL...NO DOGS IN THE KENNEL AT THE TIME.

&&

EVENT NUMBER OHX2000341

21

Local storm report, May 3, 4:55 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
455 PM CDT SUN MAY 03 2020

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

0447 PM     TSTM WND GST     NASHVILLE               36.17N  86.78W
05/03/2020  M62 MPH          DAVIDSON           TN   ASOS

&&

EVENT NUMBER OHX2000342

21

Local storm report, May 3, 4:58 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
458 PM CDT SUN MAY 03 2020

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

0441 PM     TSTM WND DMG     COLUMBIA                35.62N  87.05W
05/03/2020                   MAURY              TN   TRAINED SPOTTER

            LARGE TREE FELL ON A HOUSE ON MOCKINGBIRD LANE.

&&

EVENT NUMBER OHX2000343

21

Local storm report, May 3, 5:01 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
501 PM CDT SUN MAY 03 2020

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

0444 PM     TSTM WND GST     2 NW NASHBORO VILLAGE   36.12N  86.68W
05/03/2020  M71 MPH          DAVIDSON           TN   ASOS

            NASHVILLE AIRPORT ASOS MEASURED A WIND GUST OF 62 KNOTS
            / 71 MPH

0451 PM     TSTM WND GST     2 NNE SMYRNA            36.01N  86.50W
05/03/2020  M61 MPH          RUTHERFORD         TN   ASOS

            SMYRNA AIRPORT ASOS MEASURED A WIND GUST OF 53 KNOTS /
            61 MPH

&&

EVENT NUMBER OHX2000344
EVENT NUMBER OHX2000345

SHAMBURGER

Local storm report, May 3, 5:04 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
504 PM CDT SUN MAY 03 2020

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

0500 PM     TSTM WND DMG     LAWRENCEBURG            35.25N  87.34W
05/03/2020                   LAWRENCE           TN   EMERGENCY MNGR

            WIDESPREAD WIND DAMAGE....TREES DOWN AND S BARN
            DAMAGED.

&&

EVENT NUMBER OHX2000346

21

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 2:56 PM CDT	Special Weather Statement	OHX	Stewart	34 min
May 3, 3:13 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	47 min
May 3, 3:22 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Houston, Humphreys	38 min
May 3, 3:37 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Lewis, Perry, Wayne	38 min
May 3, 3:44 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Montgomery, Stewart	46 min
May 3, 3:54 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Humphreys, Maury, Williamson	36 min
May 3, 4:11 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Montgomery, Robertson, Sumner	34 min
May 3, 4:12 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Hickman, Lawrence, Lewis, Maury, Wayne	48 min
May 3, 4:17 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Hickman, Marshall, Maury, Rutherford and 1 more	43 min
May 3, 4:26 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	19 min
May 3, 4:35 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Wayne	40 min
May 3, 4:41 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Marshall, Maury, Rutherford, Williamson	49 min
May 3, 4:43 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Macon, Robertson, Sumner, Trousdale, Wilson	47 min
May 3, 4:49 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, DeKalb, Rutherford, Smith, Wilson	41 min
May 3, 5:11 PM CDT	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Putnam, Smith and 4 more	49 min
May 3, 5:18 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Van Buren, Warren, White	42 min
May 3, 5:23 PM CDT	Tornado Warning	OHX	Clay, Jackson, Macon, Smith, Trousdale	16 min
May 3, 5:43 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Jackson, Overton, Pickett, Putnam	62 min
May 3, 5:44 PM CDT	Severe Thunderstorm Warning	OHX	Grundy	16 min
May 3, 5:53 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Putnam, Van Buren, White	37 min
May 3, 6:21 PM CDT	Special Weather Statement	OHX	Wayne	24 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2020 Every severe thunderstorm warning in 2020

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.