Alert archive / Tennessee / Flash Flood Warnings in 2022

Flash Flood Warning 13, NWS Nashville, TN

August 29, 20224 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Aug 29, 2022, 2:59 PM CDT for 4 counties in Tennessee. It was in force for 2 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: Aug 29, 2022, 2:59 PM CDT (19:59 UTC)
Expired: Aug 29, 2022, 5:00 PM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Cheatham County, TN, Davidson County, TN, Robertson County, TN, Sumner County, TN

The radar

The Nashville radar (KOHX), 32 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 34 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: 1146 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

141 
WGUS54 KOHX 291959
FFWOHX
TNC021-037-147-165-292200-
/O.NEW.KOHX.FF.W.0013.220829T1959Z-220829T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
259 PM CDT Mon Aug 29 2022

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  East Central Cheatham County in middle Tennessee...
  Northwestern Davidson County in middle Tennessee...
  Southeastern Robertson County in middle Tennessee...
  Southwestern Sumner County in middle Tennessee...

* Until 500 PM CDT.

* At 259 PM CDT, Doppler radar indicated thunderstorms producing 
  very heavy rain across southern Robertson and northern Davidson 
  Counties. Radar estimates up to 3 inches of rain have fallen in 
  the past hour. 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...
  Ashland City, Hendersonville, Goodlettsville, White House, 
  Millersville, Greenbrier, Coopertown, Ridgetop, Joelton, Whites 
  Creek and Beaman Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3631 8710 3647 8673 3633 8660 3616 8699

FLASH FLOOD...RADAR INDICATED

$$

Shamburger

1 follow-up statement

647 
WGUS74 KOHX 292025
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
325 PM CDT Mon Aug 29 2022

TNC021-037-147-165-292200-
/O.CON.KOHX.FF.W.0013.000000T0000Z-220829T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cheatham TN-Davidson TN-Robertson TN-Sumner TN-
325 PM CDT Mon Aug 29 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM CDT THIS 
AFTERNOON FOR EAST CENTRAL CHEATHAM, NORTHWESTERN DAVIDSON, 
SOUTHEASTERN ROBERTSON AND SOUTHWESTERN SUMNER COUNTIES...

At 325 PM CDT, Doppler radar indicated thunderstorms continue to 
produce very heavy rain across the warned area around Ashland City, 
Joelton, Ridgetop and Goodlettsville. Radar estimates between 2 and 
4 inches of rain have fallen in the past 1 to 2 hours. 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...
  Ashland City, Hendersonville, Goodlettsville, White House, 
  Millersville, Greenbrier, Coopertown, Ridgetop, Joelton, Whites 
  Creek and Beaman Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3631 8710 3647 8673 3633 8660 3616 8699

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
Aug 28, 7:51 PM CDT	Special Weather Statement	OHX	Houston, Stewart	24 min
Aug 28, 8:29 PM CDT	Special Weather Statement	OHX	Houston, Stewart	46 min
Aug 29, 12:41 PM CDT	Areal Flood Advisory	OHX	Robertson, Sumner	115 min
Aug 29, 1:43 PM CDT	Special Weather Statement	OHX	Humphreys	32 min
Aug 29, 1:50 PM CDT	Areal Flood Advisory	OHX	Montgomery	2 hr
Aug 29, 2:35 PM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Robertson, Sumner	26 min
Aug 29, 2:46 PM CDT	Special Weather Statement	OHX	Robertson	29 min
Aug 29, 2:50 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	25 min
Aug 29, 2:51 PM CDT	Special Weather Statement	OHX	Humphreys	39 min
Aug 29, 3:10 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson	35 min
Aug 29, 4:17 PM CDT	Areal Flood Advisory	OHX	Wayne	103 min
Aug 29, 4:20 PM CDT	Areal Flood Advisory	OHX	Cheatham, Davidson, Dickson, Williamson	2 hr
Aug 29, 4:25 PM CDT	Special Weather Statement	OHX	Williamson	35 min
Aug 29, 6:12 PM CDT	Areal Flood Advisory	OHX	Lewis, Perry, Wayne	2 hr

Nearby

Flash Flood Warnings in Tennessee, 2022 Every flash flood warning in 2022

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.