Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Nashville, TN

February 28, 20215 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Feb 28, 2021, 5:55 PM CST for 5 counties in Tennessee. It was in force for 4 hr. 3 reports 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, 5:55 PM CST (23:55 UTC)
Expired: Feb 28, 2021, 10:00 PM CST
In force: 4 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Houston County, TN, Humphreys County, TN, Montgomery County, TN, Robertson County, TN, Stewart County, TN

The radar

The Ft Campbell radar (KHPX), 59 km from the middle of the area, began a volume at 23:59 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, 6:20 PM CST	FLASH FLOOD	Dover, TN	ROAD FLOODING REPORTED ON THE TRACE ONE MILE NORTH OF HWY 79 AND ON SANDY ROAD AT INDIAN CREEK IN DOVER.
Feb 28, 6:57 PM CST	FLASH FLOOD	Big Rock, TN	MULTIPLE ROADS FLOODED ACROSS THE COUNTY
Feb 28, 8:25 PM CST	FLASH FLOOD	Erin, TN	BAGGETT HOLLOW ROAD IS CLOSED DUE TO A MUDSLIDE

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 12:00Z, 11.9 hours before the alert went out and 114 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: 50 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 695 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 480 m²/s²
0-3 km storm-relative helicity: 488 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

034 
WGUS54 KOHX 282355
FFWOHX
TNC083-085-125-147-161-010400-
/O.NEW.KOHX.FF.W.0005.210228T2355Z-210301T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Houston County in middle Tennessee...
  Northwestern Humphreys County in middle Tennessee...
  Montgomery County in middle Tennessee...
  Northwestern Robertson County in middle Tennessee...
  Stewart County in middle Tennessee...

* Until 1000 PM CST.

* At 555 PM CST, 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...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...
  Clarksville, Camden, Dover, Erin, Tennessee Ridge, Big Rock, 
  Adams, Cumberland City, Indian Mound, Woodlawn, Palmyra, 
  Cunningham, Land Between The Lakes and Houston County Airport.

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 3665 8785 3663 8785 3663 8784 3665 8690
      3633 8749 3633 8751 3632 8752 3609 8795
      3611 8792 3615 8792 3622 8795 3627 8795
      3632 8796 3644 8806 3649 8806 3654 8803
      3668 8807

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

1 follow-up statement

366 
WGUS74 KOHX 010111
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
711 PM CST Sun Feb 28 2021

TNC083-085-125-147-161-010400-
/O.CON.KOHX.FF.W.0005.000000T0000Z-210301T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Houston TN-Humphreys TN-Montgomery TN-Robertson TN-Stewart TN-
711 PM CST Sun Feb 28 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM CST THIS 
EVENING FOR HOUSTON, NORTHWESTERN HUMPHREYS, MONTGOMERY, 
NORTHWESTERN ROBERTSON AND STEWART COUNTIES...

At 711 PM CST, emergency management reported flash flooding ongoing 
across the warned area. Between 1 and 3 inches of rain have fallen 
this evening. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management. At 657 PM CST...Stewart County EMA
         reported multiple roads flooded across the county.

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...
  Clarksville, Camden, Dover, Erin, Tennessee Ridge, Big Rock, 
  Adams, Cumberland City, Indian Mound, Woodlawn, Palmyra, 
  Cunningham, Land Between The Lakes and Houston County Airport.

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 3665 8785 3663 8785 3663 8784 3665 8690
      3633 8749 3633 8751 3632 8752 3609 8795
      3611 8792 3615 8792 3622 8795 3627 8795
      3632 8796 3644 8806 3649 8806 3654 8803
      3668 8807

FLASH FLOOD...OBSERVED

$$

Shamburger

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 7:00 PM CST	Special Weather Statement	OHX	Hickman, Perry	45 min
Feb 27, 7:25 PM CST	Areal Flood Advisory	OHX	Hickman, Perry	2 hr
Feb 27, 7:31 PM CST	Areal Flood Advisory	OHX	Cheatham, Davidson, Maury, Rutherford, Williamson	3 hr
Feb 27, 7:52 PM CST	Flash Flood Warning	OHX	Dickson, Hickman, Perry	3 hr
Feb 27, 8:07 PM CST	Flash Flood Warning	OHX	Cheatham, Davidson, Rutherford, Williamson	3 hr
Feb 27, 8:12 PM CST	Special Weather Statement	OHX	Hickman	48 min
Feb 27, 8:16 PM CST	Areal Flood Advisory	OHX	Smith, Trousdale, Wilson	3 hr
Feb 27, 8:40 PM CST	Flash Flood Warning	OHX	Smith, Wilson	3 hr
Feb 27, 8:59 PM CST	Areal Flood Advisory	OHX	Davidson, Sumner, Trousdale, Wilson	3 hr
Feb 27, 9:08 PM CST	Areal Flood Advisory	OHX	Jackson, Smith	112 min
Feb 27, 10:01 PM CST	Flash Flood Warning	OHX	Davidson, Sumner, Trousdale, Wilson	119 min
Feb 28, 12:36 AM CST	River Flood Advisory	OHX	Davidson	3 days
Feb 28, 12:47 AM CST	River Flood Advisory	OHX	Hickman	3 hr
Feb 28, 9:43 AM CST	River Flood Advisory	OHX	Davidson	64 hr
Feb 28, 2:44 PM CST	Special Weather Statement	OHX	Macon	31 min
Feb 28, 3:11 PM CST	Special Weather Statement	OHX	Macon	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.