Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 73, NWS Nashville, TN

October 6, 2021Humphreys County, Perry County, Tennessee

NWS Nashville, TN issued this flash flood warning at Oct 6, 2021, 8:56 PM CDT for Humphreys County, Perry County, Tennessee. It was in force for 4 hr. 4 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: Oct 6, 2021, 8:56 PM CDT (01:56 UTC)
Expired: Oct 7, 2021, 1:00 AM CDT
In force: 4 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Humphreys County, TN, Perry County, TN

The radar

The Ft Campbell radar (KHPX), 96 km from the middle of the area, began a volume at 01:57 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
Oct 6, 9:40 PM CDT	FLASH FLOOD	4 S Waverly, TN	VIDEO SHOWS FLOODING ON PUMPKIN CREEK ROAD WITH WATER SURROUNDING AND ENTERING SOME BUILDINGS
Oct 6, 9:40 PM CDT	FLASH FLOOD	4 S Waverly, TN	VIDEO SHOWS FLOODING ON PUMPKING CREEK ROAD WITH WATER SURROUNDING AND ENTERING SOME BUILDINGS
Oct 6, 9:59 PM CDT	FLASH FLOOD	Waverly, TN	WATER FLOWING OVER HIGHWAY 70 IN WAVERLY
Oct 6, 10:48 PM CDT	FLASH FLOOD	4 S Waverly, TN	SEVERAL ROADS ARE FLOODED SOUTH OF WAVERLY, INCLUDING PUMPKIN CREEK, FORKS RIVER ROAD, AND SPAN LOOP.

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, 1.9 hours before the alert went out and 112 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: 595 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

895 
WGUS54 KOHX 070156
FFWOHX
TNC085-135-070500-
/O.NEW.KOHX.FF.W.0073.211007T0156Z-211007T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
856 PM CDT Wed Oct 6 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Central Humphreys County in middle Tennessee...
  North Central Perry County in middle Tennessee...

* Until midnight CDT.

* At 856 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 4 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. 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...
  Waverly, Hurricane Mills and I-40 Near The Tennessee River.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3591 8793 3607 8792 3615 8784 3621 8773
      3621 8768 3620 8766 3609 8769 3564 8786
      3575 8796 3582 8797

FLASH FLOOD...RADAR INDICATED

$$

FB

1 follow-up statement

131 
WGUS54 KOHX 070444
FFWOHX
TNC085-135-070600-
/O.EXT.KOHX.FF.W.0073.000000T0000Z-211007T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
1144 PM CDT Wed Oct 6 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Central Humphreys County in middle Tennessee...
  North Central Perry County in middle Tennessee...

* Until 100 AM CDT.

* At 1144 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 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...
  Waverly, Hurricane Mills and I-40 Near The Tennessee River.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3591 8793 3607 8792 3615 8784 3621 8773
      3621 8768 3620 8766 3609 8769 3564 8786
      3575 8796 3582 8797

FLASH FLOOD...RADAR INDICATED

$$

Adcock

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 7:04 PM CDT	Special Weather Statement	OHX	Rutherford	41 min
Oct 6, 7:11 PM CDT	Areal Flood Advisory	OHX	Cumberland, Fentress, Pickett	3 hr
Oct 6, 7:12 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman	33 min
Oct 6, 7:14 PM CDT	Tornado Warning	OHX	Fentress	31 min
Oct 6, 7:16 PM CDT	Areal Flood Advisory	OHX	Putnam, White	3 hr
Oct 6, 7:22 PM CDT	Areal Flood Advisory	OHX	DeKalb, Warren, White	3 hr
Oct 6, 7:32 PM CDT	Areal Flood Advisory	OHX	Humphreys, Perry	3 hr
Oct 6, 7:44 PM CDT	Areal Flood Advisory	OHX	Bedford, Rutherford	3 hr
Oct 6, 7:44 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	26 min
Oct 6, 7:48 PM CDT	Flash Flood Warning	OHX	Giles	5 hr
Oct 6, 7:54 PM CDT	Special Weather Statement	OHX	Coffee	51 min
Oct 6, 8:07 PM CDT	Areal Flood Advisory	OHX	Davidson, Maury, Williamson	113 min
Oct 6, 8:17 PM CDT	Special Weather Statement	OHX	Humphreys	28 min
Oct 6, 8:28 PM CDT	Areal Flood Advisory	OHX	Humphreys	4 hr
Oct 6, 8:52 PM CDT	Flash Flood Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam, White	3 hr
Oct 6, 8:59 PM CDT	Flash Flood Warning	OHX	Perry, Wayne	4 hr
Oct 6, 9:15 PM CDT	Areal Flood Advisory	OHX	Coffee, Grundy, Warren	3 hr
Oct 6, 10:24 PM CDT	Flash Flood Warning	OHX	Bedford	3 hr
Oct 6, 10:40 PM CDT	Areal Flood Advisory	OHX	Houston, Humphreys, Montgomery	3 hr
Oct 6, 10:56 PM CDT	Areal Flood Advisory	OHX	Bedford, Cannon, Coffee, Rutherford	3 hr
Oct 6, 10:57 PM CDT	Special Weather Statement	OHX	Cannon	33 min
Oct 6, 11:35 PM CDT	Areal Flood Advisory	OHX	Cannon, DeKalb, Rutherford, Smith, Wilson	3 hr
Oct 7, 12:24 AM CDT	Areal Flood Advisory	OHX	DeKalb, Jackson, Putnam, Smith, Trousdale, Wilson	2 hr
Oct 7, 1:45 AM CDT	River Flood Advisory	OHX	Bedford	8 hr
Oct 7, 9:29 AM CDT	River Flood Advisory	OHX	Perry	20 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.