Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Nashville, TN

February 28, 2021Clay County, Jackson County, Macon County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 28, 2021, 7:39 PM CST for Clay County, Jackson County, Macon County, Tennessee. It was in force for 36 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: Feb 28, 2021, 7:39 PM CST (01:39 UTC)
Expired: Feb 28, 2021, 8:15 PM CST
In force: 36 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clay County, TN, Jackson County, TN, Macon County, TN

The radar

The Nashville radar (KOHX), 71 km from the middle of the area, began a volume at 01:42 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 watch it was issued in

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

Issued	Product	Office	Lasted
Feb 28, 7:11 PM CST	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.7 hours before the alert went out and 82 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: 419 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

As transmitted.

559 
WUUS54 KOHX 010139
SVROHX
TNC027-087-111-010215-
/O.NEW.KOHX.SV.W.0011.210301T0139Z-210301T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Nashville TN
739 PM CST Sun Feb 28 2021

The National Weather Service in Nashville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Jackson County in Middle Tennessee...
  Northwestern Clay County in Middle Tennessee...
  Macon County in Middle Tennessee...

* Until 815 PM CST.

* At 739 PM CST, a severe thunderstorm was located over Lafayette,
  moving east at 50 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lafayette, Red Boiling Springs, Boles, Moss and Bugtussle. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3662 8557 3646 8566 3645 8614 3663 8617
      3664 8612
TIME...MOT...LOC 0139Z 263DEG 45KT 3655 8604 

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

13

1 follow-up statement

595 
WWUS54 KOHX 010209
SVSOHX

Severe Weather Statement
National Weather Service Nashville TN
809 PM CST Sun Feb 28 2021

TNC027-087-111-010219-
/O.EXP.KOHX.SV.W.0011.000000T0000Z-210301T0215Z/
Jackson TN-Clay TN-Macon TN-
809 PM CST Sun Feb 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JACKSON...
NORTHWESTERN CLAY AND MACON COUNTIES WILL EXPIRE AT 815 PM 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.  However heavy rain
is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM CST for
Middle Tennessee.

LAT...LON 3662 8557 3646 8566 3645 8614 3663 8617
      3664 8612
TIME...MOT...LOC 0209Z 263DEG 45KT 3659 8559 

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 6:01 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery	29 min
Feb 28, 6:23 PM CST	Special Weather Statement	OHX	Cheatham	37 min
Feb 28, 6:25 PM CST	Special Weather Statement	OHX	Houston, Humphreys	35 min
Feb 28, 6:30 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Montgomery, Robertson	30 min
Feb 28, 6:40 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery	35 min
Feb 28, 6:42 PM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more	5 hr
Feb 28, 6:47 PM CST	Tornado Warning	OHX	Dickson, Humphreys	13 min
Feb 28, 6:48 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	42 min
Feb 28, 7:06 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Montgomery, Robertson	24 min
Feb 28, 7:15 PM CST	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner, Trousdale	30 min
Feb 28, 7:24 PM CST	Flash Flood Warning	OHX	Dickson, Hickman, Humphreys, Perry	3 hr
Feb 28, 7:26 PM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Macon, Smith, Sumner, Trousdale and 2 more	4 hr
Feb 28, 7:32 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner, Williamson, Wilson	43 min
Feb 28, 8:05 PM CST	Severe Thunderstorm Warning	OHX	Smith, Sumner, Trousdale, Wilson	25 min
Feb 28, 8:16 PM CST	Flash Flood Warning	OHX	Clay, Jackson, Overton, Pickett	3 hr
Feb 28, 8:22 PM CST	Special Weather Statement	OHX	Rutherford, Wilson	23 min
Feb 28, 8:23 PM CST	Flash Flood Warning	OHX	Davidson, Maury, Rutherford, Smith, Williamson, Wilson	3 hr
Feb 28, 8:39 PM CST	Special Weather Statement	OHX	Fentress, Overton, Pickett, Putnam	36 min
Feb 28, 8:44 PM CST	River Flood Advisory	OHX	Cheatham, Montgomery	3 days
Feb 28, 9:35 PM CST	River Flood Advisory	OHX	Davidson, Sumner, Wilson	22 days
Feb 28, 9:38 PM CST	River Flood Advisory	OHX	Houston, Montgomery, Stewart	8 hr
Feb 28, 9:54 PM CST	Special Weather Statement	OHX	Bedford, Coffee	66 min
Feb 28, 11:05 PM CST	River Flood Advisory	OHX	Cheatham	3 hr
Feb 28, 11:09 PM CST	Areal Flood Advisory	OHX	Houston, Humphreys, Montgomery, Robertson, Stewart	3 hr
Feb 28, 11:55 PM CST	Areal Flood Advisory	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more	3 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Hickman	26 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Humphreys	4 days
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Perry	44 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Montgomery, Robertson	4 hr
Mar 1, 12:43 AM CST	River Flood Advisory	OHX	Davidson	115 min
Mar 1, 2:13 AM CST	River Flood Advisory	OHX	Cheatham	7 hr
Mar 1, 2:15 AM CST	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	42 hr
Mar 1, 2:15 AM CST	River Flood Advisory	OHX	Davidson	18 hr
Mar 1, 2:40 AM CST	River Flood Advisory	OHX	Hickman	12 hr
Mar 1, 3:44 AM CST	River Flood Advisory	OHX	Bedford	6 hr
Mar 1, 4:14 AM CST	River Flood Warning	OHX	Montgomery, Robertson	38 hr
Mar 1, 5:27 AM CST	River Flood Warning	OHX	Stewart	32 hr
Mar 1, 9:44 AM CST	River Flood Advisory	OHX	Giles	26 hr
Mar 1, 10:06 AM CST	River Flood Advisory	OHX	Lawrence	20 hr
Mar 1, 10:28 AM CST	River Flood Warning	OHX	Montgomery	32 hr
Mar 1, 3:08 PM CST	River Flood Advisory	OHX	Cheatham, Davidson, Williamson	21 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021 Every severe thunderstorm warning 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.