Alert archive / Tennessee / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 41, NWS Nashville, TN

March 3, 20204 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Mar 3, 2020, 1:28 AM CST for 4 counties in Tennessee. It was in force for 32 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: Mar 3, 2020, 1:28 AM CST (07:28 UTC)
Expired: Mar 3, 2020, 2:00 AM CST
In force: 32 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jackson County, TN, Smith County, TN, Trousdale County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 37 km from the middle of the area, began a volume at 07:27 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
Mar 2, 11:22 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 7.5 hours before the alert went out and 43 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: 346 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 559 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

082 
WUUS54 KOHX 030728
SVROHX
TNC087-159-169-189-030800-
/O.NEW.KOHX.SV.W.0041.200303T0728Z-200303T0800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
128 AM CST Tue Mar 3 2020

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Smith County in Middle Tennessee...
  Southwestern Jackson County in Middle Tennessee...
  Northern Wilson County in Middle Tennessee...
  Southwestern Trousdale County in Middle Tennessee...

* Until 200 AM CST.

* At 127 AM CST, a severe thunderstorm was located near Mount Juliet,
  or 7 miles northwest of Lebanon, moving east at 55 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...
  Lebanon, Carthage, Mount Juliet, Gordonsville, Belinda City, South
  Carthage, Tuckers Crossroads, Dixon Springs, Granville, Pleasant
  Shade and Dickerson Chapel Recreation Area.

This includes the following highways...
 Interstate 40 between mile markers 226 and 262.
 Interstate 840 near mile marker 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 AM CST for Middle
Tennessee.

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

&&

LAT...LON 3625 8578 3621 8578 3621 8581 3618 8580
      3617 8579 3617 8581 3615 8581 3617 8654
      3629 8654 3628 8652 3633 8646 3633 8642
      3631 8641 3631 8639 3634 8639 3634 8635
      3631 8636 3631 8630 3635 8628 3640 8585
TIME...MOT...LOC 0727Z 268DEG 49KT 3626 8643 

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

10

1 follow-up statement

758 
WWUS54 KOHX 030752
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
152 AM CST Tue Mar 3 2020

TNC087-159-169-189-030801-
/O.EXP.KOHX.SV.W.0041.000000T0000Z-200303T0800Z/
Smith TN-Jackson TN-Wilson TN-Trousdale TN-
152 AM CST Tue Mar 3 2020

...THE SEVERE THUNDERSTORM WARNING FOR SMITH...SOUTHWESTERN
JACKSON...NORTHERN WILSON AND SOUTHWESTERN TROUSDALE COUNTIES WILL
EXPIRE AT 200 AM CST...
                
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.

A Tornado Watch remains in effect until 300 AM CST for Middle
Tennessee.

LAT...LON 3625 8578 3621 8578 3621 8581 3618 8580
      3617 8579 3617 8581 3615 8581 3617 8654
      3629 8654 3628 8652 3633 8646 3633 8642
      3631 8641 3631 8639 3634 8639 3634 8635
      3631 8636 3631 8630 3635 8628 3640 8585
TIME...MOT...LOC 0751Z 268DEG 49KT 3627 8602 

$$

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 Mar 3, 1:09 AM CST, 19 minutes earlier.

Area forecast discussion, Mar 3, 1:09 AM CST, 19 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
109 AM CST Tue Mar 3 2020

.UPDATE...
FOR 06Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Most of Middle TN has remained dry tonight, with rain starting to
bubble over far northwestern counties at 10 PM. Intense
thunderstorms developed earlier this evening over southeast
MO/western KY and tracked east along a frontal boundary. The
position of this boundary to our north has kept thunderstorms
from breaching the TN/KY state line. Hi-res guidance suggests rain
and thunderstorms will remain focused north of I-40 over the next
several hours. Storm mode looks to become increasingly messy,
with multi-cell clusters eventually forming into a broken line of
convection overnight. Bulk shear remains on the order of 50-60+
kts with 400-500 J/kg of SBCAPE. Instability will slowly wane as
the night progresses, leading to uncertainty regarding the severe
weather threat. Nevertheless, low and mid-level wind fields will
be capable of maintaining storm organization into early Tuesday
morning.

Timing for storms will remain from now through 3 or 4 AM for NW
Middle TN, the Nashville Metro and surrounding areas from 1 AM to
5 AM, and the Cumberland Plateau after 4 or 5 AM. This means that
some rain and storms could impact the first half of the Tuesday
morning commute.

Damaging winds and hail continue to be the main concern, though
an isolated tornado cannot be ruled out. Have a few reliable
methods for receiving warnings overnight in the event they are
issued. We will continue to monitor the progress of ongoing storms
and additional development overnight tonight.

&&

.AVIATION...
06Z TAF DISCUSSION.

Round of showers/storms expected overnight into early Tuesday
as a cold front passes. This pcpn is expected to be more numerous
in the early morning hours, with pcpn dissipating during the
late morning east. CIGs/VSBY will both be affected by passing
pcpn but improvement likely by late morning Tuesday.

&&

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

&&

DISCUSSION......Schaper
AVIATION........07

Hazardous weather outlook, Mar 2, 2:58 PM CST, 10 hours 30 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
258 PM CST Mon Mar 2 2020

TNZ005>011-023>034-056>066-075-077>080-093>095-032100-
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-
258 PM CST Mon Mar 2 2020

This Hazardous Weather Outlook is for portions of Middle
Tennessee.

.DAY ONE...This Afternoon and Tonight

Strong to isolated severe storms will be possible late this
afternoon through the early overnight timeframe. The main area of
focus will be west of the Plateau where large hail, damaging
winds and even a tornado may be possible later this evening and
into the early morning hours.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may become necessary for wind damage and hail
reports this evening and overnight.

In the hours before

Local storm report, Mar 3, 12:10 AM CST, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1210 AM CST TUE MAR 03 2020

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

1207 AM     HAIL             VANLEER                 36.24N  87.44W
03/03/2020  E1.00 INCH       DICKSON            TN   SOCIAL MEDIA

            TSPOTTER REPORT OF HAIL LARGER THAN QUARTERS FALLING IN
            VANLEER.

&&

EVENT NUMBER OHX2000178

MR3

Local storm report, Mar 3, 12:21 AM CST, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1221 AM CST TUE MAR 03 2020

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

1215 AM     HAIL             CHARLOTTE               36.18N  87.35W
03/03/2020  M2.50 INCH       DICKSON            TN   SOCIAL MEDIA

            PICTURE OF MEASURED HAIL STONE ABOUT 2.5 INCHES IN
            DIAMETER.

&&

EVENT NUMBER OHX2000179

MR3

Local storm report, Mar 3, 12:24 AM CST, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1224 AM CST TUE MAR 03 2020

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

1205 AM     HAIL             2 E DICKSON             36.08N  87.34W
03/03/2020  E2.75 INCH       DICKSON            TN   SOCIAL MEDIA

            PICTURE OF A COUPLE HAILSTONES AT LEAST THE SIZE OF
            BASEBALLS FROM DICKSON RECEIVED ON TSPOTTER.

&&

EVENT NUMBER OHX2000180

MR3

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 2, 11:13 PM CST	Tornado Warning	OHX	Houston, Humphreys	32 min
Mar 2, 11:40 PM CST	Tornado Warning	OHX	Dickson, Houston, Humphreys	35 min
Mar 2, 11:43 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery, Stewart	47 min
Mar 3, 12:11 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Sumner, Wilson	34 min
Mar 3, 12:35 AM CST	Tornado Warning	OHX	Davidson, Sumner, Wilson	25 min
Mar 3, 12:46 AM CST	Severe Thunderstorm Warning	OHX	Davidson, Smith, Sumner, Trousdale, Wilson	44 min
Mar 3, 12:53 AM CST	Tornado Warning Tornado observedConsiderable damage threat	OHX	Davidson, Wilson	37 min
Mar 3, 1:17 AM CST	Tornado Warning Tornado observedConsiderable damage threat	OHX	Jackson, Smith, Wilson	13 min
Mar 3, 1:29 AM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Sumner, Wilson	2 hr
Mar 3, 1:37 AM CST	Severe Thunderstorm Warning	OHX	Jackson, Overton, Putnam, Smith, White	38 min
Mar 3, 1:48 AM CST	Tornado Warning	OHX	Jackson, Overton, Putnam	27 min
Mar 3, 1:50 AM CST	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	40 min
Mar 3, 1:56 AM CST	Tornado Warning	OHX	Cumberland, Putnam, White	20 min
Mar 3, 2:12 AM CST	Tornado Warning	OHX	Cumberland, Fentress, Overton, Putnam	33 min
Mar 3, 2:13 AM CST	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	47 min
Mar 3, 2:13 AM CST	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	15 min
Mar 3, 2:18 AM CST	Severe Thunderstorm Warning	OHX	Jackson, Putnam, Smith	26 min
Mar 3, 2:36 AM CST	Areal Flood Advisory	OHX	Montgomery, Robertson	3 hr
Mar 3, 3:29 AM CST	Areal Flood Advisory	OHX	Dickson, Houston, Humphreys	3 hr
Mar 3, 3:47 AM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	17 min
Mar 3, 3:51 AM CST	Special Weather Statement	OHX	Wilson	24 min
Mar 3, 4:02 AM CST	Special Weather Statement	OHX	Davidson	28 min
Mar 3, 4:05 AM CST	Areal Flood Advisory	OHX	Cheatham, Davidson, Sumner, Wilson	3 hr
Mar 3, 5:00 AM CST	Areal Flood Advisory	OHX	Cumberland, Fentress, Jackson, Overton, Putnam, Smith and 2 more	3 hr
Mar 3, 5:07 AM CST	Special Weather Statement	OHX	Maury, Rutherford	38 min
Mar 3, 8:57 AM CST	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	5 days
Mar 3, 5:44 PM CST	River Flood Advisory	OHX	Montgomery, Robertson	17 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.