Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 12, NWS Nashville, TN

March 27, 20215 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Mar 27, 2021, 1:15 PM CDT for 5 counties in Tennessee. It was in force for 3 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, 1:15 PM CDT (18:15 UTC)
Expired: Mar 27, 2021, 4:15 PM CDT
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Bedford County, TN, Giles County, TN, Marshall County, TN, Maury County, TN, Rutherford County, TN

The radar

The Nashville radar (KOHX), 85 km from the middle of the area, began a volume at 18:18 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, 6.3 hours before the alert went out and 71 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: 710 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 347 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

559 
WGUS54 KOHX 271815
FFWOHX
TNC003-055-117-119-149-272115-
/O.NEW.KOHX.FF.W.0012.210327T1815Z-210327T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Northern Bedford County in middle Tennessee...
  Northeastern Giles County in middle Tennessee...
  Central Marshall County in middle Tennessee...
  Southeastern Maury County in middle Tennessee...
  South Central Rutherford County in middle Tennessee...

* Until 415 PM CDT.

* At 115 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 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...
  Shelbyville, Lewisburg, Chapel Hill, Cornersville, Bell Buckle, 
  Lynnville, Farmington, Belfast, Unionville, Deason, Culleoka and 
  Fosterville.

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 3549 8704 3557 8683 3564 8664 3571 8644
      3559 8628 3540 8671 3534 8690 3529 8704

FLASH FLOOD...RADAR INDICATED

$$

Whitehead

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 8:18 PM CDT	River Flood Advisory	OHX	Perry	26 hr
Mar 27, 4:23 AM CDT	Special Weather Statement	OHX	Hickman, Lewis, Perry	37 min
Mar 27, 4:56 AM CDT	Special Weather Statement	OHX	Dickson, Hickman, Houston, Humphreys	49 min
Mar 27, 4:59 AM CDT	Special Weather Statement	OHX	Lewis	46 min
Mar 27, 5:12 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Perry	37 min
Mar 27, 5:29 AM CDT	Special Weather Statement	OHX	Cheatham, Davidson	31 min
Mar 27, 5:48 AM CDT	Severe Thunderstorm Warning	OHX	Hickman, Maury, Williamson	27 min
Mar 27, 5:52 AM CDT	Special Weather Statement	OHX	DeKalb	38 min
Mar 27, 6:13 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Williamson	32 min
Mar 27, 6:17 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Hickman, Humphreys, Williamson	29 min
Mar 27, 6:18 AM CDT	Special Weather Statement	OHX	Macon, Robertson, Sumner, Trousdale	27 min
Mar 27, 6:22 AM CDT	Special Weather Statement	OHX	Jackson	38 min
Mar 27, 6:23 AM CDT	Special Weather Statement	OHX	Cumberland, White	52 min
Mar 27, 6:38 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Sumner, Williamson, Wilson	52 min
Mar 27, 6:42 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Maury, Sumner and 1 more	48 min
Mar 27, 6:53 AM CDT	Special Weather Statement	OHX	Cumberland, Putnam, White	52 min
Mar 27, 7:19 AM CDT	Severe Thunderstorm Warning	OHX	Jackson, Macon, Smith, Trousdale, Wilson	41 min
Mar 27, 7:21 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson, Wilson	39 min
Mar 27, 7:36 AM CDT	Areal Flood Advisory	OHX	Cheatham, Dickson, Hickman, Humphreys, Perry, Williamson	3 hr
Mar 27, 7:42 AM CDT	Special Weather Statement	OHX	Smith, Williamson, Wilson	48 min
Mar 27, 7:57 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson, Overton, Putnam, Smith	33 min
Mar 27, 8:02 AM CDT	Severe Thunderstorm Warning	OHX	Maury, Rutherford, Williamson	43 min
Mar 27, 8:10 AM CDT	Areal Flood Advisory	OHX	Hickman, Lewis, Maury, Perry, Wayne, Williamson	3 hr
Mar 27, 8:26 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	34 min
Mar 27, 8:29 AM CDT	Areal Flood Advisory	OHX	Cannon, Clay, Davidson, DeKalb, Jackson, Macon and 9 more	3 hr
Mar 27, 8:39 AM CDT	Special Weather Statement	OHX	Fentress, Overton, Putnam	51 min
Mar 27, 8:41 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Overton, Putnam	34 min
Mar 27, 8:59 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	16 min
Mar 27, 10:33 AM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence, Lewis, Maury	42 min
Mar 27, 11:08 AM CDT	Special Weather Statement	OHX	Bedford, Maury	52 min
Mar 27, 11:19 AM CDT	Areal Flood Advisory	OHX	Bedford, Giles, Hickman, Lawrence, Lewis, Marshall and 5 more	3 hr
Mar 27, 11:42 AM CDT	River Flood Advisory	OHX	Hickman	10 hr
Mar 27, 11:42 AM CDT	River Flood Advisory	OHX	Humphreys	4 days
Mar 27, 11:42 AM CDT	River Flood Advisory	OHX	Maury	15 hr
Mar 27, 11:51 AM CDT	Special Weather Statement	OHX	Bedford	39 min
Mar 27, 12:14 PM CDT	Flash Flood Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	3 hr
Mar 27, 12:41 PM CDT	River Flood Advisory	OHX	Hickman	12 hr
Mar 27, 12:42 PM CDT	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	23 hr
Mar 27, 12:53 PM CDT	Special Weather Statement	OHX	Bedford, Marshall	52 min
Mar 27, 1:32 PM CDT	Special Weather Statement	OHX	Coffee	43 min
Mar 27, 2:04 PM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Wayne	3 hr
Mar 27, 2:37 PM CDT	River Flood Warning	OHX	Cheatham	52 hr
Mar 27, 2:37 PM CDT	River Flood Warning	OHX	Davidson, Williamson	47 hr
Mar 27, 2:37 PM CDT	River Flood Warning	OHX	Williamson	48 hr
Mar 27, 3:30 PM CDT	River Flood Advisory	OHX	Stewart	31 hr
Mar 27, 3:30 PM CDT	River Flood Advisory	OHX	Montgomery	31 hr
Mar 27, 3:30 PM CDT	River Flood Advisory	OHX	Davidson	12 hr
Mar 27, 4:14 PM CDT	Special Weather Statement	OHX	Cumberland	46 min
Mar 27, 4:45 PM CDT	River Flood Advisory	OHX	Bedford	11 hr
Mar 27, 4:54 PM CDT	Tornado Warning	OHX	Hickman, Perry	36 min
Mar 27, 5:17 PM CDT	Tornado Warning	OHX	Hickman, Perry	28 min
Mar 27, 5:33 PM CDT	Tornado Warning	OHX	Hickman, Lewis, Perry	27 min
Mar 27, 5:39 PM CDT	Areal Flood Advisory	OHX	Hickman, Lewis, Perry	3 hr
Mar 27, 5:39 PM CDT	Tornado Warning	OHX	Hickman, Perry	36 min
Mar 27, 5:52 PM CDT	Special Weather Statement	OHX	Clay, Fentress, Overton, Pickett	38 min
Mar 27, 6:00 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	45 min
Mar 27, 6:04 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress	11 min
Mar 27, 6:09 PM CDT	Flash Flood Warning	OHX	Hickman, Lewis, Maury, Perry	3 hr
Mar 27, 6:18 PM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	42 min
Mar 27, 6:28 PM CDT	Special Weather Statement	OHX	Fentress	17 min
Mar 27, 6:38 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Rutherford, Williamson	22 min
Mar 27, 6:44 PM CDT	Flash Flood Warning	OHX	Maury, Williamson	3 hr
Mar 27, 6:59 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	46 min

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.