Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 38, NWS Nashville, TN

July 18, 2021Lawrence County, Wayne County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 18, 2021, 8:03 PM CDT for Lawrence County, Wayne County, Tennessee. It was in force for 11 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: Jul 18, 2021, 8:03 PM CDT (01:03 UTC)
Expired: Jul 19, 2021, 7:13 AM CDT
In force: 11 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), 116 km from the middle of the area, began a volume at 01:02 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, 1.1 hours before the alert went out and 131 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: 151 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1019 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

257 
WGUS54 KOHX 190103
FFWOHX
TNC099-181-190300-
/O.NEW.KOHX.FF.W.0038.210719T0103Z-210719T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
803 PM CDT Sun Jul 18 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southern Lawrence County in middle Tennessee...
  Southeastern Wayne County in middle Tennessee...

* Until 1000 PM CDT.

* At 803 PM 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...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Lawrenceburg, Loretto, Collinwood, St. Joseph, Westpoint, Iron 
  City, Leoma and Cypress Inn.

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.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3501 8786 3523 8785 3520 8722 3517 8722
      3516 8720 3515 8720 3514 8721 3513 8720
      3512 8720 3512 8721 3510 8721 3509 8722
      3505 8722 3500 8722

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

5 follow-up statements

266 
WGUS54 KOHX 190246
FFWOHX
TNC099-181-190400-
/O.EXT.KOHX.FF.W.0038.000000T0000Z-210719T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
946 PM CDT Sun Jul 18 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Southern Lawrence County in middle Tennessee...
  Southeastern Wayne County in middle Tennessee...

* Until 1100 PM CDT.

* At 946 PM 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...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Lawrenceburg, Loretto, Collinwood, St. Joseph, Westpoint, Iron 
  City, Leoma and Cypress Inn.

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.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3501 8786 3523 8785 3520 8722 3517 8722
      3516 8720 3515 8720 3514 8721 3513 8720
      3512 8720 3512 8721 3510 8721 3509 8722
      3505 8722 3500 8722

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

216 
WGUS54 KOHX 190346
FFWOHX
TNC099-181-190500-
/O.EXT.KOHX.FF.W.0038.000000T0000Z-210719T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
1046 PM CDT Sun Jul 18 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Southwestern Lawrence County in middle Tennessee...
  Southeastern Wayne County in middle Tennessee...

* Until midnight CDT.

* At 1046 PM 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...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Loretto, Collinwood, St. Joseph, Iron City, Westpoint and Cypress 
  Inn.

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.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3501 8786 3520 8782 3519 8749 3500 8739

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

711 
WGUS54 KOHX 190435
FFWOHX
TNC099-181-190900-
/O.EXT.KOHX.FF.W.0038.000000T0000Z-210719T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
1135 PM CDT Sun Jul 18 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Southwestern Lawrence County in middle Tennessee...
  Southeastern Wayne County in middle Tennessee...

* Until 400 AM CDT.

* At 1135 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Loretto, Collinwood, St. Joseph, Iron City, Westpoint and Cypress 
  Inn.

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.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3501 8786 3520 8782 3519 8749 3500 8739

FLASH FLOOD...RADAR INDICATED

$$

JB Wright

554 
WGUS54 KOHX 190808
FFWOHX
TNC099-181-191300-
/O.EXT.KOHX.FF.W.0038.000000T0000Z-210719T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
308 AM CDT Mon Jul 19 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Southwestern Lawrence County in middle Tennessee...
  Southeastern Wayne County in middle Tennessee...

* Until 800 AM CDT.

* At 308 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy showers across the warned area. Between 3 to around 5 inches 
  of rain have fallen. Flash flooding is ongoing or expected to 
  begin shortly.

  HAZARD...Flash flooding caused by heavy showers.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Loretto, Collinwood, St. Joseph, Iron City, Westpoint and Cypress 
  Inn.

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.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3501 8786 3520 8782 3519 8749 3500 8739

FLASH FLOOD...RADAR INDICATED

$$

JB Wright

559 
WGUS74 KOHX 191213
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
713 AM CDT Mon Jul 19 2021

TNC099-181-191223-
/O.CAN.KOHX.FF.W.0038.000000T0000Z-210719T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lawrence TN-Wayne TN-
713 AM CDT Mon Jul 19 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN LAWRENCE AND 
SOUTHEASTERN WAYNE COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat this morning. Please continue to heed remaining road closures.

Additional rain and thunderstorms could create a flooding risk later 
today. A Flash Flood Watch remains in effect until 600 PM CDT Monday 
for the southwest portion of Middle Tennessee.

LAT...LON 3501 8786 3520 8782 3519 8749 3500 8739

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:19 PM CDT	Areal Flood Advisory	OHX	Fentress	116 min
Jul 18, 7:34 PM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Wayne	3 hr
Jul 18, 8:30 PM CDT	Areal Flood Advisory	OHX	Jackson, Overton, Putnam	2 hr
Jul 19, 12:40 AM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Lewis, Perry, Wayne	7 hr
Jul 19, 2:04 AM CDT	Flash Flood Watch	OHX	Giles, Lawrence, Wayne	34 min
Jul 19, 2:38 AM CDT	Flash Flood Watch	OHX	Giles, Lawrence, Wayne	15 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.