Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 7, NWS Nashville, TN

February 28, 20214 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Feb 28, 2021, 7:24 PM CST for 4 counties in Tennessee. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 28, 2021, 7:24 PM CST (01:24 UTC)
Expired: Feb 28, 2021, 10:00 PM CST
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Dickson County, TN, Hickman County, TN, Humphreys County, TN, Perry County, TN

The radar

The Ft Campbell radar (KHPX), 105 km from the middle of the area, began a volume at 01:25 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.

What was reported inside it

Time	Report	Where	Remark
Feb 28, 9:00 PM CST	FLASH FLOOD	7 Wnw Bon Aqua, TN	SEVERAL ROADS FLOODED ACROSS DICKSON COUNTY INCLUDING YELLOW CREEK ROAD AT BISHOP SLAB, SOUTH ENO ROAD, PINEY CREEK AT DOUBLE BRANCH ROAD, AND GAMERS CREEK AT SAM HOLLOW ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.4 hours before the alert went out and 103 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: 419 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 979 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

As transmitted.

915 
WGUS54 KOHX 010124
FFWOHX
TNC043-081-085-135-010400-
/O.NEW.KOHX.FF.W.0007.210301T0124Z-210301T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
724 PM CST Sun Feb 28 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southern Dickson County in middle Tennessee...
  Hickman County in middle Tennessee...
  Southern Humphreys County in middle Tennessee...
  Perry County in middle Tennessee...

* Until 1000 PM CST.

* At 724 PM CST, 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...
  Dickson, Centerville, Linden, White Bluff, Burns, Lobelville, 
  Bucksnort, Pinewood, Nunnelly, Pleasantville, Lyles, Bon Aqua, 
  I-40 Near The Tennessee River, Primm Springs and Mousetail Landing 
  State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3586 8794 3592 8793 3592 8765 3600 8754
      3618 8717 3597 8720 3597 8721 3596 8721
      3578 8723 3551 8797 3561 8804 3568 8802
      3572 8803 3577 8798 3583 8797

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
Feb 28, 6:01 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Montgomery	29 min
Feb 28, 6:23 PM CST	Special Weather Statement	OHX	Cheatham	37 min
Feb 28, 6:25 PM CST	Special Weather Statement	OHX	Houston, Humphreys	35 min
Feb 28, 6:30 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Montgomery, Robertson	30 min
Feb 28, 6:40 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Houston, Humphreys, Montgomery	35 min
Feb 28, 6:42 PM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more	5 hr
Feb 28, 6:47 PM CST	Tornado Warning	OHX	Dickson, Humphreys	13 min
Feb 28, 6:48 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	42 min
Feb 28, 7:06 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson, Montgomery, Robertson	24 min
Feb 28, 7:15 PM CST	Severe Thunderstorm Warning	OHX	Macon, Robertson, Sumner, Trousdale	30 min
Feb 28, 7:26 PM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Macon, Smith, Sumner, Trousdale and 2 more	4 hr
Feb 28, 7:32 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner, Williamson, Wilson	43 min
Feb 28, 7:39 PM CST	Severe Thunderstorm Warning	OHX	Clay, Jackson, Macon	36 min
Feb 28, 8:05 PM CST	Severe Thunderstorm Warning	OHX	Smith, Sumner, Trousdale, Wilson	25 min
Feb 28, 8:16 PM CST	Flash Flood Warning	OHX	Clay, Jackson, Overton, Pickett	3 hr
Feb 28, 8:22 PM CST	Special Weather Statement	OHX	Rutherford, Wilson	23 min
Feb 28, 8:23 PM CST	Flash Flood Warning	OHX	Davidson, Maury, Rutherford, Smith, Williamson, Wilson	3 hr
Feb 28, 8:39 PM CST	Special Weather Statement	OHX	Fentress, Overton, Pickett, Putnam	36 min
Feb 28, 8:44 PM CST	River Flood Advisory	OHX	Cheatham, Montgomery	3 days
Feb 28, 9:35 PM CST	River Flood Advisory	OHX	Davidson, Sumner, Wilson	22 days
Feb 28, 9:38 PM CST	River Flood Advisory	OHX	Houston, Montgomery, Stewart	8 hr
Feb 28, 9:54 PM CST	Special Weather Statement	OHX	Bedford, Coffee	66 min
Feb 28, 11:05 PM CST	River Flood Advisory	OHX	Cheatham	3 hr
Feb 28, 11:09 PM CST	Areal Flood Advisory	OHX	Houston, Humphreys, Montgomery, Robertson, Stewart	3 hr
Feb 28, 11:55 PM CST	Areal Flood Advisory	OHX	Cheatham, Davidson, Dickson, Houston, Humphreys, Montgomery and 2 more	3 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Hickman	26 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Humphreys	4 days
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Perry	44 hr
Mar 1, 12:17 AM CST	River Flood Advisory	OHX	Montgomery, Robertson	4 hr
Mar 1, 12:43 AM CST	River Flood Advisory	OHX	Davidson	115 min
Mar 1, 2:13 AM CST	River Flood Advisory	OHX	Cheatham	7 hr
Mar 1, 2:15 AM CST	River Flood Advisory	OHX	Sumner, Trousdale, Wilson	42 hr
Mar 1, 2:15 AM CST	River Flood Advisory	OHX	Davidson	18 hr
Mar 1, 2:40 AM CST	River Flood Advisory	OHX	Hickman	12 hr
Mar 1, 3:44 AM CST	River Flood Advisory	OHX	Bedford	6 hr
Mar 1, 4:14 AM CST	River Flood Warning	OHX	Montgomery, Robertson	38 hr
Mar 1, 5:27 AM CST	River Flood Warning	OHX	Stewart	32 hr
Mar 1, 9:44 AM CST	River Flood Advisory	OHX	Giles	26 hr
Mar 1, 10:06 AM CST	River Flood Advisory	OHX	Lawrence	20 hr
Mar 1, 10:28 AM CST	River Flood Warning	OHX	Montgomery	32 hr
Mar 1, 3:08 PM CST	River Flood Advisory	OHX	Cheatham, Davidson, Williamson	21 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.