Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 28, NWS Nashville, TN

March 31, 2021Lawrence County, Wayne County, Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 31, 2021, 1:28 AM CDT for Lawrence County, Wayne County, Tennessee. It was in force for 8 hr. 9 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: Mar 31, 2021, 1:28 AM CDT (06:28 UTC)
Expired: Mar 31, 2021, 9:00 AM CDT
In force: 8 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Lawrence County, TN, Wayne County, TN

The radar

The Northeast Alabama radar (KHTX), 125 km from the middle of the area, began a volume at 06:32 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
Mar 31, 3:00 AM CDT	FLASH FLOOD	5 S Waynesboro, TN	SEVERAL HOMES SURROUNDED BY FLOOD WATERS ON SUNNY ACRES DRIVE
Mar 31, 3:11 AM CDT	FLASH FLOOD	Ethridge, TN	WYNN ROAD IS FLOODED AND CLOSED
Mar 31, 3:50 AM CDT	FLASH FLOOD	Henryville, TN	HENRYVILLE ROAD FLOODED. MOST LOW WATER BRIDGES IMPASSABLE.
Mar 31, 4:00 AM CDT	FLASH FLOOD	5 Wnw Ethridge, TN	42 WATER FORK ROAD WASHED OUT. NUMEROUS OTHER ROADS FLOODED ACROSS THE COUNTY.
Mar 31, 4:48 AM CDT	FLASH FLOOD	3 Wnw Ethridge, TN	WIDESPREAD FLASH FLOODING ACROSS NORTHERN LAWRENCE COUNTY. LONG ROAD BETWEEN HENRYVILLE ROAD AND CROSS ROAD WASHED OUT.
Mar 31, 5:00 AM CDT	FLASH FLOOD	Waynesboro, TN	FLOOD WATERS SUBMERGED THE HELTON ST BRIDGE NEAR WAYNESBORO ELEMENTARY
Mar 31, 5:11 AM CDT	FLASH FLOOD	3 S Summertown, TN	SWIFT WATER RESCUE BEING CONDUCTED ON BRACE ROAD BRIDGE NEAR WALKER ROAD
Mar 31, 5:21 AM CDT	FLASH FLOOD	Henryville, TN	NORTHBOUND LANE OF HIGHWAY 240 FLOODED NEAR HENRYVILLE FIRE DEPT
Mar 31, 6:45 AM CDT	FLASH FLOOD	Henryville, TN	HIGHWAY 240 AT HENRYVILLE ROAD CLOSED DUE TO HIGH WATER

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.5 hours before the alert went out and 115 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: 2196 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

214 
WGUS54 KOHX 310628
FFWOHX
TNC099-181-310900-
/O.NEW.KOHX.FF.W.0028.210331T0628Z-210331T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
128 AM CDT Wed Mar 31 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Northern Lawrence County in middle Tennessee...
  Central Wayne County in middle Tennessee...

* Until 400 AM CDT.

* At 128 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the central and northern Wayne and Lawrence 
  Counties. Radar estimates between 1 and 2.5 inches of rain have 
  fallen. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Lawrenceburg, Waynesboro, Collinwood, Ethridge, Henryville and 
  Lutts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3511 8798 3529 8798 3543 8721 3542 8721
      3540 8721 3539 8721 3538 8721 3536 8721
      3535 8721 3533 8721 3529 8722 3529 8723
      3522 8722

FLASH FLOOD...RADAR INDICATED

$$

Shamburger

2 follow-up statements

586 
WGUS54 KOHX 310842
FFWOHX
TNC099-181-311200-
/O.EXT.KOHX.FF.W.0028.000000T0000Z-210331T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
342 AM CDT Wed Mar 31 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Northern Lawrence County in middle Tennessee...
  Central Wayne County in middle Tennessee...

* Until 700 AM CDT.

* At 342 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain moving back into the warned area. Between 2 and 4 
  inches of rain have fallen so far this morning. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Lawrenceburg, Waynesboro, Collinwood, Ethridge, Henryville and 
  Lutts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3511 8798 3529 8798 3543 8721 3542 8721
      3540 8721 3539 8721 3538 8721 3536 8721
      3535 8721 3533 8721 3529 8722 3529 8723
      3522 8722

FLASH FLOOD...RADAR INDICATED

$$

Shamburger

393 
WGUS54 KOHX 311127
FFWOHX
TNC099-181-311400-
/O.EXT.KOHX.FF.W.0028.000000T0000Z-210331T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
627 AM CDT Wed Mar 31 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Northern Lawrence County in middle Tennessee...
  Central Wayne County in middle Tennessee...

* Until 900 AM CDT.

* At 627 AM CDT, Emergency management reported several flooded roads 
  across the area this morning. Doppler radar indicated 
  thunderstorms continue to produce heavy rain. Between 2 and 4 
  inches of rain have fallen so far this morning. Flash flooding is 
  expected to continue for a few couple more hours.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Lawrenceburg, Waynesboro, Collinwood, Ethridge, Henryville and 
  Lutts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3511 8798 3529 8798 3543 8721 3542 8721
      3540 8721 3539 8721 3538 8721 3536 8721
      3535 8721 3533 8721 3529 8722 3529 8723
      3522 8722

FLASH FLOOD...OBSERVED

$$

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 10:53 PM CDT	River Flood Advisory	OHX	Maury	10 hr
Mar 30, 11:04 PM CDT	Special Weather Statement	OHX	Cheatham, Dickson, Houston, Humphreys	41 min
Mar 30, 11:12 PM CDT	Special Weather Statement	OHX	Wayne	48 min
Mar 30, 11:40 PM CDT	Areal Flood Advisory	OHX	Dickson, Hickman, Humphreys, Perry	2 hr
Mar 30, 11:44 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Williamson	46 min
Mar 30, 11:53 PM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Williamson	3 hr
Mar 30, 11:58 PM CDT	Special Weather Statement	OHX	Lewis, Maury	47 min
Mar 30, 11:59 PM CDT	Special Weather Statement	OHX	Giles, Lawrence	46 min
Mar 31, 12:09 AM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	79 min
Mar 31, 12:28 AM CDT	Areal Flood Advisory	OHX	Rutherford, Sumner, Trousdale, Wilson	3 hr
Mar 31, 12:39 AM CDT	Special Weather Statement	OHX	Bedford, Giles, Lawrence, Marshall, Maury, Rutherford and 1 more	66 min
Mar 31, 2:13 AM CDT	Flash Flood Warning	OHX	Giles, Marshall, Maury	7 hr
Mar 31, 2:55 AM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Rutherford, Williamson, Wilson	3 hr
Mar 31, 3:35 AM CDT	River Flood Warning	OHX	Davidson	2 hr
Mar 31, 4:19 AM CDT	Areal Flood Advisory	OHX	Bedford, Coffee	5 hr
Mar 31, 7:23 AM CDT	River Flood Advisory	OHX	Hickman	2 hr
Mar 31, 8:17 AM CDT	River Flood Advisory	OHX	Giles	5 hr
Mar 31, 8:42 AM CDT	River Flood Advisory	OHX	Lawrence	4 hr
Mar 31, 9:29 AM CDT	River Flood Advisory	OHX	Davidson, Williamson	17 hr
Mar 31, 1:02 PM CDT	River Flood Advisory	OHX	Perry, Wayne	25 hr
Mar 31, 1:05 PM CDT	River Flood Advisory	OHX	Bedford, Marshall	11 hr
Mar 31, 1:10 PM CDT	River Flood Warning	OHX	Lawrence	16 hr
Mar 31, 1:19 PM CDT	River Flood Warning	OHX	Giles	15 hr
Mar 31, 1:22 PM CDT	River Flood Advisory	OHX	Grundy	7 hr
Mar 31, 1:39 PM CDT	Freeze Warning	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	19 hr
Mar 31, 1:39 PM CDT	Hard Freeze Warning	OHX	Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 32 more	43 hr
Mar 31, 5:23 PM CDT	River Flood Advisory	OHX	Cheatham, Montgomery	52 hr

Nearby

Flash Flood Warnings in Tennessee, 2021 Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.