Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 29, NWS Nashville, TN

March 31, 2021Giles County, Marshall County, Maury County, Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 31, 2021, 2:13 AM CDT for Giles County, Marshall County, Maury County, Tennessee. It was in force for 7 hr. 2 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, 2:13 AM CDT (07:13 UTC)
Expired: Mar 31, 2021, 9:00 AM CDT
In force: 7 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Giles County, TN, Marshall County, TN, Maury County, TN

The radar

The Northeast Alabama radar (KHTX), 83 km from the middle of the area, began a volume at 07:14 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, 5:50 AM CDT	FLASH FLOOD	Lynnville, TN	SEVERAL ROADS FLOODED ACROSS THE COUNTY INCLUDING HWY 31N...HWY 129...FACTORY CREEK RD...OLD CAMPBELLSVILLE RD...AND PIGEON ROOST RD.
Mar 31, 8:00 AM CDT	FLASH FLOOD	Lynnville, TN	ADDITIONAL ROADS FLOODED AND IMPASSABLE ACROSS THE COUNTY INCLUDE OLD HWY 64 IN FRANKEWING...MINNOW BRANCH RD...GUNTER SMITH RD...ROBERTSON HOLLOW RD...BIG DRY CREEK RD...LITTLE DRY CREEK RD...WEAKLY CREEK RD...HOME HILL RD...THOMAS RD...KERR HILL RD....MILKY

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, 7.2 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: 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.

303 
WGUS54 KOHX 310713
FFWOHX
TNC055-117-119-311000-
/O.NEW.KOHX.FF.W.0029.210331T0713Z-210331T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Northern Giles County in middle Tennessee...
  Southern Marshall County in middle Tennessee...
  South Central Maury County in middle Tennessee...

* Until 500 AM CDT.

* At 213 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 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...
  Lewisburg, Cornersville, Lynnville and Belfast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3543 8721 3550 8666 3546 8667 3536 8662
      3536 8660 3534 8661 3533 8660 3531 8665
      3531 8668 3525 8675 3526 8683 3522 8722
      3529 8722 3529 8723

FLASH FLOOD...RADAR INDICATED

$$

Shamburger

2 follow-up statements

515 
WGUS54 KOHX 310922
FFWOHX
TNC055-117-119-311200-
/O.EXT.KOHX.FF.W.0029.000000T0000Z-210331T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Northern Giles County in middle Tennessee...
  Southern Marshall County in middle Tennessee...
  South Central Maury County in middle Tennessee...

* Until 700 AM CDT.

* At 422 AM CDT, Doppler radar indicated thunderstorms continuing to 
  produce light to moderate rain across the warned area. Between 1 
  and 3 inches of rain have fallen 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...
  Lewisburg, Cornersville, Lynnville and Belfast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3543 8721 3550 8666 3546 8667 3536 8662
      3536 8660 3534 8661 3533 8660 3531 8665
      3531 8668 3525 8675 3526 8683 3522 8722
      3529 8722 3529 8723

FLASH FLOOD...RADAR INDICATED

$$

Shamburger

639 
WGUS54 KOHX 311129
FFWOHX
TNC055-117-119-311400-
/O.EXT.KOHX.FF.W.0029.000000T0000Z-210331T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Northern Giles County in middle Tennessee...
  Southern Marshall County in middle Tennessee...
  South Central Maury County in middle Tennessee...

* Until 900 AM CDT.

* At 629 AM CDT, Doppler radar indicated thunderstorms continue to 
  produce heavy rain across the warned area. Between 1.5 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...
  Lewisburg, Cornersville, Lynnville and Belfast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3543 8721 3550 8666 3546 8667 3536 8662
      3536 8660 3534 8661 3533 8660 3531 8665
      3531 8668 3525 8675 3526 8683 3522 8722
      3529 8722 3529 8723

FLASH FLOOD...RADAR INDICATED

$$

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, 1:28 AM CDT	Flash Flood Warning	OHX	Lawrence, Wayne	8 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.