Alert archive / Tennessee / Flash Flood Watches in 2021

Flash Flood Watch 3, NWS Nashville, TN

March 29, 202138 counties in Tennessee

NWS Nashville, TN issued this flash flood watch at Mar 29, 2021, 6:09 PM CDT for 38 counties in Tennessee. It took effect at Mar 30, 2021, 7:00 PM CDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Mar 29, 2021, 6:09 PM CDT (23:09 UTC)
In effect from
Mar 30, 2021, 7:00 PM CDT
Expired
Mar 31, 2021, 9:11 AM CDT
In force
14 hr
Issued by
NWS Nashville, TN
Flood severity
None
All 38 counties

Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 30 km from the middle of the area, began a volume at 23:15 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 12:00Z, 11.2 hours before the alert went out and 20 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2021-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2021-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -35 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1690 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
-35 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

610 
WGUS64 KOHX 292309
FFAOHX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Nashville TN
609 PM CDT Mon Mar 29 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-301015-
/O.NEW.KOHX.FF.A.0003.210331T0000Z-210401T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Goodlettsville, Crossville, Carthage, 
Smyrna, Lawrenceburg, McEwen, Clarksville, Pulaski, La Vergne, 
Coalmont, Altamont, Jamestown, Springfield, Linden, Waverly, 
Lewisburg, Columbia, Brentwood, Tullahoma, Woodbury, McMinnville, 
Nashville, Spencer, Kingston Springs, Ashland City, Dickson, 
Waynesboro, South Carthage, Sparta, Smithville, Murfreesboro, 
Cookeville, New Johnsonville, Livingston, Lafayette, Franklin, 
Gainesboro, Hartsville, Allardt, Tennessee Ridge, Centerville, 
Dover, Byrdstown, Lobelville, Mount Juliet, Manchester, Lebanon, 
Clifton, Celina, Hendersonville, Hohenwald, Gordonsville, 
Shelbyville, Erin, and Gallatin
609 PM CDT Mon Mar 29 2021

...FLASH FLOOD WATCH IN EFFECT FROM 7 PM CDT TUESDAY UNTIL 1 AM CDT 
THURSDAY...

The National Weather Service in Nashville has issued a

* Flash Flood Watch for a portion of Middle Tennessee, including the 
  following areas, Bedford, Cannon, Cheatham, Clay, Coffee, 
  Cumberland, Davidson, De Kalb, Dickson, Fentress, Giles, Grundy, 
  Hickman, Houston, Humphreys, Jackson, Lawrence, Lewis, Macon, 
  Marshall, Maury, Montgomery, Overton, Perry, Pickett, Putnam, 
  Robertson, Rutherford, Smith, Stewart, Sumner, Trousdale, Van 
  Buren, Warren, Wayne, White, Williamson and Wilson.

* From Tuesday evening through late Wednesday night

* Numerous showers and scattered thunderstorms are expected across 
  Middle Tennessee Tuesday Night. Scattered to numerous showers are 
  expected to last through at least Wednesday late afternoon hours. 
  Some showers could linger across Cumberland Plateau Region during 
  Wednesday evening also. One to two inches, with locally higher 
  amounts around 3 inches, possible on already significantly 
  saturated ground conditions from rainfall of previous days.

* Rainfall will cause excess runoff and localized flash flooding in 
  the watch area, including adding additional water level rises on 
  already elevated area rivers and creeks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

A Flash Flood Watch means that conditions may develop that lead to 
Flash Flooding. Flash Flooding is a very dangerous situation. You 
should monitor later forecasts and be prepared to take action should 
Flash Flood Warnings be issued.

&&

$$

JB Wright
4 follow-up statements
694 
WGUS64 KOHX 300811
FFAOHX

Flood Watch
National Weather Service Nashville TN
311 AM CDT Tue Mar 30 2021


TNZ005>011-023>034-056>066-075-077>080-093>095-310000-
/O.CON.KOHX.FF.A.0003.210331T0000Z-210401T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Dover, Clarksville, Springfield, 
Hendersonville, Gallatin, Goodlettsville, Lafayette, Celina, 
Byrdstown, Erin, Tennessee Ridge, Waverly, New Johnsonville, 
McEwen, Dickson, Ashland City, Kingston Springs, Nashville, 
Lebanon, Mount Juliet, Hartsville, Carthage, South Carthage, 
Gordonsville, Gainesboro, Cookeville, Livingston, Jamestown, 
Allardt, Linden, Lobelville, Centerville, Hohenwald, Franklin, 
Brentwood, Columbia, Lewisburg, Murfreesboro, Smyrna, La Vergne, 
Woodbury, Smithville, Sparta, Crossville, Shelbyville, Tullahoma,
Manchester, McMinnville, Altamont, Coalmont, Spencer, Clifton, 
Waynesboro, Lawrenceburg, and Pulaski
311 AM CDT Tue Mar 30 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* A portion of Middle Tennessee, including the following areas, 
  Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland, Davidson, 
  De Kalb, Dickson, Fentress, Giles, Grundy, Hickman, Houston, 
  Humphreys, Jackson, Lawrence, Lewis, Macon, Marshall, Maury, 
  Montgomery, Overton, Perry, Pickett, Putnam, Robertson, 
  Rutherford, Smith, Stewart, Sumner, Trousdale, Van Buren, 
  Warren, Wayne, White, Williamson, and Wilson. 

* From this evening through late Wednesday night

* Numerous showers and scattered thunderstorms are expected across
  Middle Tennessee tonight and are expected to last through at
  least Wednesday late afternoon hours. One to two inches...with 
  locally higher amounts is expected...possible on already 
  significantly saturated ground conditions from rainfall of 
  previous days. 

* Rainfall will cause excess runoff and localized flash flooding 
  in the watch area, including adding additional water level 
  rises on already elevated area rivers and creeks. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

A Flash Flood Watch means that conditions may develop that lead
to Flash Flooding. Flash Flooding is a very dangerous situation.
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
749 
WGUS64 KOHX 301852
FFAOHX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Nashville TN
152 PM CDT Tue Mar 30 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-310500-
/O.EXT.KOHX.FF.A.0003.210331T0000Z-210331T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Goodlettsville, Crossville, Carthage, 
Smyrna, Lawrenceburg, McEwen, Clarksville, Pulaski, La Vergne, 
Coalmont, Altamont, Jamestown, Springfield, Linden, Waverly, 
Lewisburg, Columbia, Brentwood, Tullahoma, Woodbury, McMinnville, 
Nashville, Spencer, Kingston Springs, Ashland City, Dickson, 
Waynesboro, South Carthage, Sparta, Smithville, Murfreesboro, 
Cookeville, New Johnsonville, Livingston, Lafayette, Franklin, 
Gainesboro, Hartsville, Allardt, Tennessee Ridge, Centerville, 
Dover, Byrdstown, Lobelville, Mount Juliet, Manchester, Lebanon, 
Clifton, Celina, Hendersonville, Hohenwald, Gordonsville, 
Shelbyville, Erin, and Gallatin
152 PM CDT Tue Mar 30 2021

...FLASH FLOOD WATCH NOW IN EFFECT FROM 7 PM CDT THIS EVENING 
THROUGH WEDNESDAY MORNING...

The Flash Flood Watch is now in effect for

* A portion of Middle Tennessee, including the following areas, 
  Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland, Davidson, De 
  Kalb, Dickson, Fentress, Giles, Grundy, Hickman, Houston, 
  Humphreys, Jackson, Lawrence, Lewis, Macon, Marshall, Maury, 
  Montgomery, Overton, Perry, Pickett, Putnam, Robertson, 
  Rutherford, Smith, Stewart, Sumner, Trousdale, Van Buren, Warren, 
  Wayne, White, Williamson and Wilson.

* From 7 PM CDT this evening through Wednesday morning

* Numerous showers and scattered thunderstorms are expected across 
  Middle Tennessee tonight and Wednesday morning. One to two inches 
  of rain will be common, with locally higher amounts possible. 
  Areas that are already saturated from recent heavy rainfall will 
  have the greatest threat from flash flooding.

* Rainfall will cause excess runoff and localized flash flooding in 
  the watch area, including water level rises on already elevated 
  creeks. The main rivers are not expected to rise again from this 
  rainfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

A Flash Flood Watch means that conditions may develop that lead to 
Flash Flooding. Flash Flooding is a very dangerous situation. You 
should monitor later forecasts and be prepared to take action should 
Flash Flood Warnings be issued.

&&

$$

13
449 
WGUS64 KOHX 310316
FFAOHX

Flood Watch
National Weather Service Nashville TN
1016 PM CDT Tue Mar 30 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-311700-
/O.CON.KOHX.FF.A.0003.000000T0000Z-210331T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Goodlettsville, Crossville, Carthage, 
Smyrna, Lawrenceburg, McEwen, Clarksville, Pulaski, La Vergne, 
Coalmont, Altamont, Jamestown, Springfield, Linden, Waverly, 
Lewisburg, Columbia, Brentwood, Tullahoma, Woodbury, McMinnville, 
Nashville, Spencer, Kingston Springs, Ashland City, Dickson, 
Waynesboro, South Carthage, Sparta, Smithville, Murfreesboro, 
Cookeville, New Johnsonville, Livingston, Lafayette, Franklin, 
Gainesboro, Hartsville, Allardt, Tennessee Ridge, Centerville, 
Dover, Byrdstown, Lobelville, Mount Juliet, Manchester, Lebanon, 
Clifton, Celina, Hendersonville, Hohenwald, Gordonsville, 
Shelbyville, Erin, and Gallatin
1016 PM CDT Tue Mar 30 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY MORNING...

The Flash Flood Watch continues for

* A portion of Middle Tennessee, including the following areas, 
  Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland, Davidson, De 
  Kalb, Dickson, Fentress, Giles, Grundy, Hickman, Houston, 
  Humphreys, Jackson, Lawrence, Lewis, Macon, Marshall, Maury, 
  Montgomery, Overton, Perry, Pickett, Putnam, Robertson, 
  Rutherford, Smith, Stewart, Sumner, Trousdale, Van Buren, Warren, 
  Wayne, White, Williamson and Wilson.

* Through Wednesday morning

* Numerous showers and scattered thunderstorms are expected across 
  Middle Tennessee tonight and Wednesday morning. One to two inches 
  of rain will be common, with locally higher amounts possible. 
  Areas that are already saturated from recent heavy rainfall will 
  have the greatest threat from flash flooding.

* Rainfall will cause excess runoff and localized flash flooding in 
  the watch area, including water level rises on already elevated 
  creeks. The main rivers are not expected to rise again from this 
  rainfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

A Flash Flood Watch means that conditions may develop that lead to 
Flash Flooding. Flash Flooding is a very dangerous situation. You 
should monitor later forecasts and be prepared to take action should 
Flash Flood Warnings be issued.

&&

$$

Barnwell
633 
WGUS64 KOHX 311411
FFAOHX

Flood Watch
National Weather Service Nashville TN
911 AM CDT Wed Mar 31 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-311515-
/O.CAN.KOHX.FF.A.0003.000000T0000Z-210331T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Goodlettsville, Crossville, Carthage, 
Smyrna, Lawrenceburg, McEwen, Clarksville, Pulaski, La Vergne, 
Coalmont, Altamont, Jamestown, Springfield, Linden, Waverly, 
Lewisburg, Columbia, Brentwood, Tullahoma, Woodbury, McMinnville, 
Nashville, Spencer, Kingston Springs, Ashland City, Dickson, 
Waynesboro, South Carthage, Sparta, Smithville, Murfreesboro, 
Cookeville, New Johnsonville, Livingston, Lafayette, Franklin, 
Gainesboro, Hartsville, Allardt, Tennessee Ridge, Centerville, 
Dover, Byrdstown, Lobelville, Mount Juliet, Manchester, Lebanon, 
Clifton, Celina, Hendersonville, Hohenwald, Gordonsville, 
Shelbyville, Erin, and Gallatin
911 AM CDT Wed Mar 31 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of Middle Tennessee, including 
the following areas, Bedford, Cannon, Cheatham, Clay, Coffee, 
Cumberland, Davidson, De Kalb, Dickson, Fentress, Giles, Grundy, 
Hickman, Houston, Humphreys, Jackson, Lawrence, Lewis, Macon, 
Marshall, Maury, Montgomery, Overton, Perry, Pickett, Putnam, 
Robertson, Rutherford, Smith, Stewart, Sumner, Trousdale, Van Buren, 
Warren, Wayne, White, Williamson and Wilson has been cancelled.

Heavy rainfall has ended and no additional flash flooding is 
expected. Some areas where flooding developed earlier will continue 
to have high water, especially across the southern counties of 
Middle Tennessee. Numerous river flood warnings and advisories 
remain in effect as well. Please heed all road closures and do not 
drive into water covered areas.

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 28, 10:30 PM CDTRiver Flood WarningOHXMontgomery67 hr
Mar 28, 10:39 PM CDTRiver Flood WarningOHXStewart35 hr
Mar 28, 10:57 PM CDTRiver Flood WarningOHXHickman4 days
Mar 29, 7:08 AM CDTRiver Flood WarningOHXCheatham22 hr
Mar 29, 7:26 AM CDTRiver Flood AdvisoryOHXDavidson37 hr
Mar 29, 11:38 AM CDTRiver Flood AdvisoryOHXWilliamson19 hr
Mar 29, 11:46 AM CDTRiver Flood AdvisoryOHXGiles19 hr
Mar 29, 1:27 PM CDTRiver Flood AdvisoryOHXDavidson, Williamson20 hr

Nearby

Flash Flood Watches in Tennessee, 2021Every flash flood watch 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.