Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Nashville, TN

May 4, 2021Cannon County, Rutherford County, Tennessee

NWS Nashville, TN issued this special weather statement at May 4, 2021, 6:59 AM CDT for Cannon County, Rutherford County, Tennessee. It was in force for 31 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: May 4, 2021, 6:59 AM CDT (11:59 UTC)
Expired: May 4, 2021, 7:30 AM CDT
In force: 31 min
Issued by: NWS Nashville, TN

Counties Cannon County, TN, Rutherford County, TN

The radar

The Nashville radar (KOHX), 54 km from the middle of the area, began a volume at 11:58 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 12.0 hours before the alert went out and 42 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: 2263 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1050 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 4, 6:37 AM CDT, 22 minutes earlier.

Area forecast discussion, May 4, 6:37 AM CDT, 22 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
637 AM CDT Tue May 4 2021

.UPDATE...
FOR 12Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Ongoing scattered t'storms across Middle TN with already a few
severe t'storms in progress. Per our 06Z sounding, still have a
pretty ripe environment for storms to develop and wouldn't be
surprised if some storms are able to stay discrete out ahead of
the main line currently crossing the Mississippi River. Lapse
rates have decreased ever so slightly compared to our 00Z
sounding, but low-level shear has ramped up a bit. Forecast
remains unchanged for this morning though with damaging winds
continuing to be the primary concern with any severe storm that
develops. Have had a few reports of hail with some of the stronger
storms and still cannot rule out an isolated tornado or two. PWATs
from the 06Z sounding were around 1.5" so will need to watch any
training storms as flash flooding could become an issue if
rainfall persists over a particular area. Expecting storms to
remain mainly discrete through the next few hours, becoming more
linear as the QLCS to our west moves towards us. Latest CAMs
guidance has the line crossing the TN river between 5 AM and 7 AM.
Do have a severe t'storm watch for our western counties as this
line will reach that area first.

This first round will move to the east by mid-morning to
lunchtime for most and we should get a few hours of a break this
afternoon. Second round of showers and t'storms will begin to move
into our southern counties by the afternoon with an additional
line moving into our northwestern counties by the early evening.
Will have some time to destabilize even further this afternoon.
Best chance of severe weather does appear to be across our
southern counties, with damaging winds and small hail as the
primary concerns. Still can't rule out an isolated tornado as
there will still be some low-level turning. PWAT values remain in
the 1.25-1.75" range into the afternoon, so any training storms
could lead to some localized flash flooding issues once again.

Any lingering showers/t'storms will be pushed out of the area as
the surface frontal system passes through Wednesday AM. Upper-
level trough will swing through and push eastward the second half
of the week with a weak disturbance possible Thursday. Any
showers we do see would be widely scattered. Things will dry out
on Friday with dry conditions through the first half of Saturday.
Expect for temps on the cooler side on Thursday and Friday with
highs in the mid to upper 60s across the area. The weekend through
at least the first half of next week looks fairly unsettled as
several rounds of showers and t'storms appear possible. Expect
highs to reach back into the upper 70s to near 80 as well.

&&

.AVIATION...
12Z TAF DISCUSSION.

A band of strong to severe thunderstorms will impact BNA/MQY until
14Z and CSV through 16Z. Conditions will improve after the band of
storms passes with mainly VFR 17Z-21Z. Additional scattered showers
and storms will form after 21Z. Prevailing winds will be SSW near
10KT, but strong gusty winds expected around TSRA.

&&

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

&&

DISCUSSION......Adcock
AVIATION........13

Hazardous weather outlook, May 4, 5:00 AM CDT, 1 hour 59 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
500 AM CDT Tue May 4 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-051000-
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-
500 AM CDT Tue May 4 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

Two rounds of severe weather will be possible today. The first will
occur early this morning through mid-morning as a line of strong to
severe t'storms moves through the area. The second round of strong
to severe t'storms is expect late this afternoon into this evening.
Damaging winds and localized flooding due to heavy rainfall will be
the main concerns with both rounds. Small hail and an isolated
tornado or two cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

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

09

In the hours before

Special weather statement, May 4, 6:23 AM CDT, 36 minutes before

Special Weather Statement
National Weather Service Nashville TN
623 AM CDT Tue May 4 2021

TNZ027-028-057>062-041200-
Hickman TN-Rutherford TN-Williamson TN-Lewis TN-Davidson TN-
Wilson TN-Maury TN-Marshall TN-
623 AM CDT Tue May 4 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DAVIDSON...NORTHEASTERN
LEWIS...NORTHEASTERN MARSHALL...WESTERN RUTHERFORD...MAURY...
WILLIAMSON...SOUTHWESTERN WILSON AND SOUTHEASTERN HICKMAN COUNTIES
UNTIL 700 AM CDT...

At 623 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Bellevue to near Mount Pleasant. Movement
was east at 40 mph.

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

Locations impacted include...
Murfreesboro, Franklin, Columbia, Smyrna, Brentwood, La Vergne,
Spring Hill, Nolensville, Forest Hills, Mount Pleasant, Oak Hill,
Belle Meade, Thompson's Station, Walterhill, Bellevue, Antioch, Rural
Hill, Chapel Hill, Eagleville and Gordonsburg.

This includes the following highways...
 Interstate 40 between mile markers 194 and 198.
 Interstate 65 between mile markers 40 and 79.
 Interstate 24 between mile markers 55 and 77.
 Interstate 840 between mile markers 11 and 69.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
Middle Tennessee. A Severe Thunderstorm Watch also remains in effect
until 1100 AM CDT for Middle Tennessee.

LAT...LON 3556 8744 3610 8698 3610 8623 3570 8658
      3570 8664 3563 8665 3554 8672
TIME...MOT...LOC 1123Z 267DEG 36KT 3601 8691 3559 8728

Schaper

Special weather statement, May 4, 6:28 AM CDT, 31 minutes before

Special Weather Statement
National Weather Service Nashville TN
628 AM CDT Tue May 4 2021

TNZ058-060-061-093>095-041215-
Lawrence TN-Wayne TN-Lewis TN-Maury TN-Giles TN-Marshall TN-
628 AM CDT Tue May 4 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LEWIS...SOUTHEASTERN
WAYNE...SOUTHWESTERN MARSHALL...LAWRENCE...SOUTHERN MAURY AND
NORTHWESTERN GILES COUNTIES UNTIL 715 AM CDT...

At 627 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Mount Pleasant to 7 miles
southwest of Loretto. Movement was east at 35 mph.

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

Locations impacted include...
Lewisburg, Lawrenceburg, Pulaski, Mount Pleasant, Loretto,
Summertown, St. Joseph, Minor Hill, Ethridge, Lynnville, Gordonsburg,
Henryville, Culleoka, Cypress Inn, Goodspring, Leoma, Westpoint and
Iron City.

This includes Interstate 65 between mile markers 26 and 39.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 800 AM CDT for
Middle Tennessee. A Severe Thunderstorm Watch also remains in effect
until 1100 AM CDT for Middle Tennessee.

LAT...LON 3501 8782 3557 8743 3555 8671 3500 8718
TIME...MOT...LOC 1127Z 261DEG 31KT 3545 8718 3503 8755

Schaper

Local storm report, May 4, 6:29 AM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
629 AM CDT TUE MAY 04 2021

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

0627 AM     TSTM WND DMG     SW WHITE HOUSE          36.46N  86.67W
05/04/2021                   ROBERTSON          TN   EMERGENCY MNGR

            REPORT OF NUMEROUS TRESS DOWN IN ROBERTSON COUNTY.

&&

EVENT NUMBER OHX2100447

CMA

Local storm report, May 4, 6:32 AM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
632 AM CDT TUE MAY 04 2021

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

0632 AM     TSTM WND DMG     GOODLETTSVILLE          36.32N  86.71W
05/04/2021                   DAVIDSON           TN   SOCIAL MEDIA

            TSPOTTER REPORT OF A TREE THROUGH A FENCE IN
            GOODLETTSVILLE OFF OF LICKTON PIKE.

&&

EVENT NUMBER OHX2100448

CMA

Local storm report, May 4, 6:34 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
634 AM CDT TUE MAY 04 2021

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

0633 AM     TSTM WND DMG     1 W MILLERSVILLE        36.38N  86.73W
05/04/2021                   SUMNER             TN   SOCIAL MEDIA

            4" TREE SNAPPED MID TRUCK ON WILLIASMON RD. NEAR
            MANSKER CREEK

&&

EVENT NUMBER OHX2100449

CMA

Special weather statement, May 4, 6:59 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Nashville TN
659 AM CDT Tue May 4 2021

TNZ028-059-061>063-075-077-041230-
Cannon TN-Rutherford TN-Williamson TN-Wilson TN-Bedford TN-Coffee TN-
Marshall TN-
659 AM CDT Tue May 4 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARSHALL...
RUTHERFORD...SOUTHEASTERN WILLIAMSON...NORTHWESTERN COFFEE...
SOUTHEASTERN WILSON...NORTHERN BEDFORD AND WESTERN CANNON COUNTIES
UNTIL 730 AM CDT...

At 658 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Smyrna to 10 miles north of Lewisburg.
Movement was east at 45 mph.

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

Locations impacted include...
Murfreesboro, Woodbury, Smyrna, La Vergne, Nolensville, Walterhill,
Chapel Hill, Eagleville, Bell Buckle, Auburntown, Lascassas,
Christiana, Beechgrove, Fosterville, Triune, Rover, Deason, Rockvale,
Bradyville and Milton.

This includes the following highways...
 Interstate 24 between mile markers 65 and 100.
 Interstate 840 between mile markers 40 and 64.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 1100 AM CDT for
Middle Tennessee.

LAT...LON 3559 8684 3560 8682 3566 8682 3604 8656
      3600 8603 3596 8602 3594 8598 3557 8618
TIME...MOT...LOC 1158Z 273DEG 41KT 3599 8648 3560 8676

Schaper

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 9:22 PM CDT	River Flood Advisory	OHX	Hickman	11 hr
May 3, 11:50 PM CDT	Special Weather Statement	OHX	Sumner	40 min
May 3, 11:56 PM CDT	Special Weather Statement	OHX	Jackson, Macon, Trousdale	34 min
May 4, 12:25 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon, Trousdale	35 min
May 4, 12:58 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon	47 min
May 4, 1:32 AM CDT	Special Weather Statement	OHX	Cumberland	43 min
May 4, 1:34 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Overton	26 min
May 4, 1:54 AM CDT	Special Weather Statement	OHX	Macon	51 min
May 4, 2:00 AM CDT	Special Weather Statement	OHX	Pickett	45 min
May 4, 2:07 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland	23 min
May 4, 3:01 AM CDT	Special Weather Statement	OHX	Clay	29 min
May 4, 3:07 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Overton, Pickett	38 min
May 4, 4:12 AM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Stewart	48 min
May 4, 4:50 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Montgomery, Robertson, Stewart	55 min
May 4, 5:02 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Houston, Humphreys, Perry	58 min
May 4, 5:39 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Robertson, Sumner	51 min
May 4, 5:43 AM CDT	Special Weather Statement	OHX	Lewis, Perry	47 min
May 4, 5:56 AM CDT	Tornado Warning	OHX	Davidson, Robertson, Sumner	34 min
May 4, 6:00 AM CDT	Special Weather Statement	OHX	Hickman	30 min
May 4, 6:10 AM CDT	Tornado Warning	OHX	Robertson, Sumner	22 min
May 4, 6:16 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Macon, Smith, Sumner, Trousdale, Wilson	44 min
May 4, 6:21 AM CDT	Tornado Warning	OHX	Sumner, Trousdale, Wilson	24 min
May 4, 6:23 AM CDT	Special Weather Statement	OHX	Maury, Williamson	37 min
May 4, 6:28 AM CDT	Special Weather Statement	OHX	Giles, Lawrence	47 min
May 4, 6:42 AM CDT	Tornado Warning	OHX	Macon, Smith, Sumner, Trousdale	33 min
May 4, 6:52 AM CDT	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Putnam, Smith and 2 more	38 min
May 4, 7:01 AM CDT	Special Weather Statement	OHX	Bedford, Giles, Marshall	29 min
May 4, 7:11 AM CDT	Tornado Warning	OHX	Jackson, Smith	34 min
May 4, 7:27 AM CDT	Tornado Warning	OHX	DeKalb, Putnam, Smith	33 min
May 4, 7:29 AM CDT	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Fentress, Jackson, Overton, Pickett and 2 more	46 min
May 4, 7:35 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, DeKalb, Rutherford, Warren	40 min
May 4, 7:48 AM CDT	Tornado Warning	OHX	DeKalb, Putnam, White	27 min
May 4, 7:53 AM CDT	Severe Thunderstorm Warning	OHX	Coffee, Cumberland, DeKalb, Grundy, Van Buren, Warren and 1 more	37 min
May 4, 8:05 AM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam, White	40 min
May 4, 8:07 AM CDT	Tornado Warning	OHX	Cumberland, White	23 min
May 4, 8:24 AM CDT	Tornado Warning	OHX	Cumberland, White	11 min
May 4, 8:29 AM CDT	Areal Flood Advisory	OHX	Clay, Fentress, Jackson, Overton, Pickett	2 hr
May 4, 9:32 AM CDT	River Flood Warning	OHX	Perry	21 hr

Nearby

Special Weather Statements in Tennessee, 2021 Every special weather statement in 2021

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.