Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 53, NWS Nashville, TN
NWS Nashville, TN issued this flash flood warning at Aug 21, 2021, 4:55 PM CDT for 4 counties in Tennessee. It was in force for 6 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
- Aug 21, 2021, 4:55 PM CDT (21:55 UTC)
- Expired
- Aug 21, 2021, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dickson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN
The radar
The Ft Campbell radar (KHPX), 76 km from the middle of the area, began a volume at 21:58 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 |
|---|---|---|---|
| Aug 21, 6:30 PM CDT | HEAVY RAIN 15.19 | Mcewen, TN | TVA GAUGE IN MCEWEN MEASURED 15.19 OF RAIN SINCE MIDNIGHT WITH RAIN STILL FALLING |
| Aug 21, 7:30 PM CDT | HEAVY RAIN 16.99 | Mcewen, TN | TVA GAUGE UPDATED RAINFALL TOTAL SINCE MIDNIGHT |
| Aug 21, 8:30 PM CDT | HEAVY RAIN 17.02 | Mcewen, TN | TVA GAUGE IN MCEWEN MEASURED 17.02 OF RAIN SINCE MIDNIGHT. RAIN HAS NOW STOPPED. |
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, 9.9 hours before the alert went out and 104 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.
- Mixed-layer CAPE
- 1243 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted.
613
WGUS54 KOHX 212155
FFWOHX
TNC043-081-083-085-220345-
/O.NEW.KOHX.FF.W.0053.210821T2155Z-210822T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
455 PM CDT Sat Aug 21 2021
The National Weather Service in Nashville has issued a
* Flash Flood Warning for...
Southwestern Dickson County in middle Tennessee...
Northern Hickman County in middle Tennessee...
Houston County in middle Tennessee...
Northeastern Humphreys County in middle Tennessee...
* Until 1045 PM CDT.
* At 455 PM CDT, Showers and thunderstorms produced heavy rain
across the warned area earlier this morning. Between 8 and 14
inches of rain have fallen. Additional rainfall amounts of 1 to 2
inches are possible in the warned area over the next few hours,
and additional flash flood warnings may be issued. Flash flooding
is ongoing and expected to continue this evening.
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...
Dickson, Waverly, Centerville, Erin, McEwen, Tennessee Ridge,
Pinewood, Bucksnort, Nunnelly, Lyles, Bon Aqua, Primm Springs and
Houston County Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3626 8794 3629 8795 3631 8796 3635 8798
3635 8795 3634 8790 3633 8785 3633 8779
3635 8774 3592 8721 3579 8723 3571 8742
3580 8762 3624 8795
FLASH FLOOD...RADAR INDICATED
$$
Barnwell1 follow-up statement
311
WGUS54 KOHX 212320
FFWOHX
TNC043-081-083-085-220400-
/O.EXT.KOHX.FF.W.0053.000000T0000Z-210822T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
620 PM CDT Sat Aug 21 2021
The National Weather Service in Nashville has extended the
* Flash Flood Warning for...
Southwestern Dickson County in middle Tennessee...
Northern Hickman County in middle Tennessee...
Houston County in middle Tennessee...
Northeastern Humphreys County in middle Tennessee...
* Until 1100 PM CDT.
* At 620 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain moving back across the warned area. Between 9 and 14
inches of rain have fallen so far today. Additional rainfall
amounts of 1 to 3 inches are possible in the warned area.
HAZARD...Life threatening flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Dickson, Waverly, Centerville, Erin, McEwen, Tennessee Ridge,
Pinewood, Bucksnort, Nunnelly, Lyles, Bon Aqua, Primm Springs and
Houston County Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3626 8794 3629 8795 3631 8796 3635 8798
3635 8795 3634 8790 3633 8785 3633 8779
3635 8774 3592 8721 3579 8723 3571 8742
3580 8762 3624 8795
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
ShamburgerThe office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:48 AM CDT | Areal Flood Advisory | OHX | Dickson, Hickman, Humphreys, Lewis | 2 hr |
| Aug 21, 3:29 AM CDT | Flash Flood Warning | OHX | Dickson, Hickman, Humphreys | 5 hr |
| Aug 21, 4:10 AM CDT | Areal Flood Advisory | OHX | Giles, Lawrence, Lewis, Maury | 3 hr |
| Aug 21, 4:29 AM CDT | Areal Flood Advisory | OHX | Montgomery, Stewart | 3 hr |
| Aug 21, 4:49 AM CDT | Flash Flood Warning | OHX | Dickson, Hickman, Houston, Humphreys | 3 hr |
| Aug 21, 6:24 AM CDT | Flash Flood Warning | OHX | Houston, Humphreys, Stewart | 5 hr |
| Aug 21, 7:47 AM CDT | Flash Flood Warning | OHX | Dickson, Hickman, Houston, Humphreys | 9 hr |
| Aug 21, 8:39 AM CDT | River Flood Warning | OHX | Hickman | 13 hr |
| Aug 21, 9:41 AM CDT | Areal Flood Advisory | OHX | Hickman, Lewis, Maury | 3 hr |
| Aug 21, 10:12 AM CDT | Flash Flood Warning | OHX | Hickman, Humphreys, Lewis, Maury, Perry | 3 hr |
| Aug 21, 10:17 AM CDT | River Flood Advisory | OHX | Hickman | 52 hr |
| Aug 21, 11:39 AM CDT | Areal Flood Advisory | OHX | Giles, Lawrence, Marshall | 3 hr |
| Aug 21, 12:33 PM CDT | River Flood Warning | OHX | Humphreys | 44 hr |
| Aug 21, 4:40 PM CDT | Areal Flood Advisory | OHX | Houston, Stewart | 3 hr |
| Aug 21, 5:07 PM CDT | Flash Flood Warning | OHX | Dickson, Houston, Montgomery, Stewart | 4 hr |
| Aug 21, 5:10 PM CDT | Special Weather Statement | OHX | Houston, Stewart | 50 min |
| Aug 21, 5:30 PM CDT | Special Weather Statement | OHX | Dickson, Houston | 45 min |
| Aug 21, 5:43 PM CDT | Special Weather Statement | OHX | Lawrence | 47 min |
| Aug 21, 5:57 PM CDT | Tornado Warning | OHX | Dickson | 16 min |
| Aug 21, 5:58 PM CDT | Flash Flood Warning | OHX | Cheatham, Dickson, Houston, Montgomery | 3 hr |
| Aug 21, 6:17 PM CDT | Special Weather Statement | OHX | Dickson | 43 min |
| Aug 21, 6:29 PM CDT | Special Weather Statement | OHX | Hickman | 31 min |
| Aug 21, 6:53 PM CDT | Special Weather Statement | OHX | Williamson | 37 min |
Nearby
Flash Flood Warnings in Tennessee, 2021Every 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.