Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 18, NWS Nashville, TN

March 27, 20214 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 27, 2021, 9:35 PM CDT for 4 counties in Tennessee. It was in force for 13 hr. 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 27, 2021, 9:35 PM CDT (02:35 UTC)
Expired: Mar 28, 2021, 11:00 AM CDT
In force: 13 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Marshall County, TN, Maury County, TN, Rutherford County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 59 km from the middle of the area, began a volume at 02:35 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, 2.6 hours before the alert went out and 46 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: 200 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 458 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

As transmitted.

920 
WGUS54 KOHX 280235
FFWOHX
TNC117-119-149-187-280830-
/O.NEW.KOHX.FF.W.0018.210328T0235Z-210328T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
935 PM CDT Sat Mar 27 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  North Central Marshall County in middle Tennessee...
  Northeastern Maury County in middle Tennessee...
  West Central Rutherford County in middle Tennessee...
  Southern Williamson County in middle Tennessee...

* Until 330 AM CDT.

* At 935 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 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...
  Franklin, Columbia, Spring Hill, Nolensville, Thompson's Station, 
  Eagleville, Santa Fe and Triune.

Other areas of concern include areas around Franklin, the West 
Harpeth River including West Harpeth, Murfrees Fork including 
Thompsons Station, Starnes Creek including Peytonsville, McCutcheon 
Creek and Aenon Creek around Spring Hill, and Carters Creek and 
Rutherford Creek near Neapolis.

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 3585 8721 3594 8663 3582 8662 3570 8661
      3570 8662 3570 8664 3569 8664 3568 8664
      3564 8718 3584 8722

FLASH FLOOD...RADAR INDICATED

$$

LaRosa

2 follow-up statements

715 
WGUS54 KOHX 280803
FFWOHX
TNC117-119-149-187-281200-
/O.EXT.KOHX.FF.W.0018.000000T0000Z-210328T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
303 AM CDT Sun Mar 28 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  North Central Marshall County in middle Tennessee...
  Northeastern Maury County in middle Tennessee...
  West Central Rutherford County in middle Tennessee...
  Southern Williamson County in middle Tennessee...

* Until 700 AM CDT.

* At 303 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 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...
  Franklin, Columbia, Spring Hill, Nolensville, Thompson's Station, 
  Eagleville, Santa Fe and Triune.

The intense rainfall has weakened to moderate rain showers which 
will gradually taper off through the night, but the risk for 
dangerous flash flooding remains.

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 3585 8721 3594 8663 3582 8662 3570 8661
      3570 8662 3570 8664 3569 8664 3568 8664
      3564 8718 3584 8722

FLASH FLOOD...RADAR INDICATED

$$

LaRosa

622 
WGUS54 KOHX 281134
FFWOHX
TNC117-119-149-187-281600-
/O.EXT.KOHX.FF.W.0018.000000T0000Z-210328T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
634 AM CDT Sun Mar 28 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  North Central Marshall County in middle Tennessee...
  Northeastern Maury County in middle Tennessee...
  West Central Rutherford County in middle Tennessee...
  Southern Williamson County in middle Tennessee...

* Until 1100 AM CDT.

* At 634 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 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...
  Franklin, Columbia, Spring Hill, Nolensville, Thompson's Station, 
  Eagleville, Santa Fe and Triune.

Rainfall has ended but the risk for flooding will remain through 
this morning.

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 3585 8721 3594 8663 3582 8662 3570 8661
      3570 8662 3570 8664 3569 8664 3568 8664
      3564 8718 3584 8722

FLASH FLOOD...RADAR INDICATED

$$

LaRosa

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 7:05 PM CDT	Special Weather Statement	OHX	Maury	40 min
Mar 27, 7:13 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	32 min
Mar 27, 7:32 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, DeKalb, Rutherford, Warren	43 min
Mar 27, 7:35 PM CDT	Flash Flood Warning	OHX	Bedford, Cannon, Rutherford, Williamson	3 hr
Mar 27, 7:35 PM CDT	Special Weather Statement	OHX	DeKalb	40 min
Mar 27, 7:39 PM CDT	Special Weather Statement	OHX	Davidson	36 min
Mar 27, 8:04 PM CDT	Special Weather Statement	OHX	Davidson	26 min
Mar 27, 8:08 PM CDT	Special Weather Statement	OHX	Hickman	37 min
Mar 27, 8:14 PM CDT	Special Weather Statement	OHX	Van Buren, Warren, White	31 min
Mar 27, 8:46 PM CDT	Special Weather Statement	OHX	Cumberland, White	44 min
Mar 27, 8:49 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys, Perry	41 min
Mar 27, 9:00 PM CDT	Special Weather Statement	OHX	Rutherford	45 min
Mar 27, 9:02 PM CDT	Flash Flood Warning	OHX	Dickson, Hickman, Humphreys, Lewis, Maury, Perry	14 hr
Mar 27, 9:13 PM CDT	Special Weather Statement	OHX	Davidson	47 min
Mar 27, 9:22 PM CDT	Flash Flood Warning	OHX	Cheatham, Davidson, Dickson, Williamson	14 hr
Mar 27, 9:27 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Maury	33 min
Mar 27, 9:45 PM CDT	Special Weather Statement	OHX	Cumberland	45 min
Mar 27, 9:49 PM CDT	River Flood Warning	OHX	Hickman	6 days
Mar 27, 9:55 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, White	20 min
Mar 27, 9:59 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	31 min
Mar 27, 10:05 PM CDT	Flash Flood Warning	OHX	Cheatham, Davidson, Dickson, Robertson	11 hr
Mar 27, 10:09 PM CDT	Flash Flood Warning	OHX	Davidson, Rutherford, Wilson	11 hr
Mar 27, 10:17 PM CDT	Flash Flood Warning	OHX	Cannon, DeKalb, Putnam, Smith, Van Buren, Warren and 1 more	12 hr
Mar 27, 10:20 PM CDT	Flash Flood Warning	OHX	Dickson, Houston, Humphreys	11 hr
Mar 27, 10:29 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	31 min
Mar 27, 10:37 PM CDT	Flash Flood Warning	OHX	Bedford, Cannon, Coffee, Rutherford, Warren, Williamson and 1 more	11 hr
Mar 27, 10:45 PM CDT	River Flood Warning	OHX	Perry	65 hr
Mar 27, 10:52 PM CDT	River Flood Advisory	OHX	Davidson	13 days
Mar 27, 11:02 PM CDT	Special Weather Statement	OHX	Dickson, Hickman, Humphreys, Perry	43 min
Mar 27, 11:08 PM CDT	Flash Flood Warning	OHX	Clay, Jackson, Macon, Putnam, Smith, Sumner and 2 more	11 hr
Mar 27, 11:13 PM CDT	Special Weather Statement	OHX	Wilson	32 min
Mar 27, 11:37 PM CDT	River Flood Advisory	OHX	Humphreys	3 days
Mar 27, 11:37 PM CDT	River Flood Advisory	OHX	Maury	3 hr
Mar 27, 11:37 PM CDT	Special Weather Statement	OHX	Davidson	23 min
Mar 27, 11:40 PM CDT	Special Weather Statement	OHX	Smith, Wilson	35 min
Mar 27, 11:44 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	31 min
Mar 27, 11:57 PM CDT	Flash Flood Warning	OHX	Clay, Fentress, Overton, Pickett, Putnam	11 hr
Mar 28, 12:04 AM CDT	Flash Flood Warning	OHX	Davidson, Robertson, Sumner, Trousdale, Wilson	6 hr
Mar 28, 12:13 AM CDT	River Flood Warning	OHX	Davidson	11 hr
Mar 28, 12:13 AM CDT	River Flood Warning	OHX	Davidson	6 hr
Mar 28, 12:13 AM CDT	River Flood Warning	OHX	Davidson	15 hr
Mar 28, 12:13 AM CDT	River Flood Warning	OHX	Davidson	15 hr
Mar 28, 12:15 AM CDT	Special Weather Statement	OHX	Wilson	30 min
Mar 28, 12:17 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lawrence, Lewis, Perry, Wayne	43 min
Mar 28, 12:41 AM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	OHX	Davidson, Williamson, Wilson	4 hr
Mar 28, 12:54 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Hickman, Lawrence, Lewis, Marshall, Maury and 2 more	36 min
Mar 28, 1:02 AM CDT	River Flood Warning	OHX	Hickman	18 hr
Mar 28, 1:13 AM CDT	Special Weather Statement	OHX	Smith	32 min
Mar 28, 1:25 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Giles, Lawrence, Marshall and 3 more	35 min
Mar 28, 1:34 AM CDT	Special Weather Statement	OHX	Fentress, Overton, Putnam	41 min
Mar 28, 1:44 AM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	31 min
Mar 28, 1:54 AM CDT	Severe Thunderstorm Warning	OHX	Bedford, Giles, Lawrence, Marshall	36 min
Mar 28, 2:07 AM CDT	River Flood Warning	OHX	Maury	69 hr
Mar 28, 2:09 AM CDT	Special Weather Statement	OHX	DeKalb, Putnam	51 min
Mar 28, 2:36 AM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Marshall, Wayne	6 hr
Mar 28, 2:57 AM CDT	Special Weather Statement	OHX	Coffee, Grundy, Van Buren, Warren	63 min
Mar 28, 2:58 AM CDT	Special Weather Statement	OHX	Cumberland, Fentress, White	77 min
Mar 28, 3:25 AM CDT	River Flood Warning	OHX	Davidson	61 hr
Mar 28, 3:25 AM CDT	River Flood Warning	OHX	Davidson	18 hr
Mar 28, 3:25 AM CDT	River Flood Warning	OHX	Davidson	61 hr
Mar 28, 3:25 AM CDT	River Flood Warning	OHX	Davidson	61 hr
Mar 28, 3:25 AM CDT	River Flood Warning	OHX	Davidson	61 hr
Mar 28, 3:30 AM CDT	River Flood Warning	OHX	Davidson	63 hr
Mar 28, 3:30 AM CDT	River Flood Warning	OHX	Davidson	63 hr
Mar 28, 3:54 AM CDT	River Flood Warning	OHX	Humphreys	6 days
Mar 28, 5:44 AM CDT	River Flood Advisory	OHX	Marshall	38 hr
Mar 28, 5:44 AM CDT	River Flood Advisory	OHX	Bedford, Marshall	26 hr
Mar 28, 5:44 AM CDT	River Flood Advisory	OHX	Perry, Wayne	30 hr
Mar 28, 5:44 AM CDT	River Flood Advisory	OHX	Giles	43 hr
Mar 28, 5:44 AM CDT	River Flood Advisory	OHX	Lawrence	23 hr
Mar 28, 5:52 AM CDT	Areal Flood Advisory	OHX	Davidson, Robertson, Sumner, Trousdale, Wilson	3 hr
Mar 28, 6:03 AM CDT	River Flood Advisory	OHX	Cheatham	72 hr
Mar 28, 7:28 AM CDT	River Flood Warning	OHX	Williamson	28 hr
Mar 28, 8:56 AM CDT	River Flood Warning	OHX	Hickman	3 days
Mar 28, 10:39 AM CDT	Areal Flood Advisory	OHX	Cannon, Clay, Cumberland, DeKalb, Fentress, Jackson and 6 more	3 hr
Mar 28, 11:54 AM CDT	River Flood Warning	OHX	Sumner, Trousdale, Wilson	43 hr
Mar 28, 12:30 PM CDT	River Flood Advisory	OHX	Smith	23 hr
Mar 28, 12:35 PM CDT	River Flood Advisory	OHX	Bedford	12 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.