Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 48, NWS Nashville, TN
NWS Nashville, TN issued this flash flood warning at Aug 21, 2021, 3:29 AM CDT for Dickson County, Hickman County, Humphreys County, Tennessee. It was in force for 5 hr. 7 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, 3:29 AM CDT (08:29 UTC)
- Expired
- Aug 21, 2021, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dickson County, TN, Hickman County, TN, Humphreys County, TN
The radar
The Nashville radar (KOHX), 94 km from the middle of the area, began a volume at 08:28 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, 5:12 AM CDT | FLASH FLOOD | 3 Sw Dickson, TN | MULTIPLE ROADS CLOSED DUE TO HIGH WATER THROUGHOUT THE SOUTHERN PART OF THE COUNTY AND IN DICKSON |
| Aug 21, 6:20 AM CDT | HEAVY RAIN 5.03 | 10 N Centerville, TN | 5.03 OF RAIN MEASURED IN THE LAST 2.5 HOURS |
| Aug 21, 7:40 AM CDT | FLASH FLOOD | 6 Sse Tennessee City, TN | WATER OVER ROADWAY NEAR HIGHWAY 48 AT BRAZZLE ROAD. |
| Aug 21, 7:50 AM CDT | FLASH FLOOD | 3 E Lyles, TN | TATUM ROAD BETWEEN HIGHWAY 100 AND HIGHWAY 7 IMPASSABLE DUE TO FLOODING. |
| Aug 21, 8:00 AM CDT | FLASH FLOOD | Nunnelly, TN | CAMPERS AND PEOPLE TRAPPED IN VEHICLES ACROSS NORTHERN HICKMAN COUNTY. |
| Aug 21, 8:00 AM CDT | HEAVY RAIN 11.66 | 10 N Centerville, TN | 11.66 INCHES MEASURED SO FAR. PINEY RIVER RD FLOODED AND BASEMENTS FLOODING AS WELL. |
| Aug 21, 8:05 AM CDT | FLASH FLOOD | 1 E Waverly, TN | SEVERAL WATER RESCUES ONGOING JUST EAST OF WAVERLY IN HUMPHREYS COUNTY. |
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, 8.5 hours before the alert went out and 84 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
- 689 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1089 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.1
The text
As transmitted.
204
WGUS54 KOHX 210829
FFWOHX
TNC043-081-085-211130-
/O.NEW.KOHX.FF.W.0048.210821T0829Z-210821T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
329 AM CDT Sat Aug 21 2021
The National Weather Service in Nashville has issued a
* Flash Flood Warning for...
Southwestern Dickson County in middle Tennessee...
Hickman County in middle Tennessee...
Northeastern Humphreys County in middle Tennessee...
* Until 630 AM CDT.
* At 329 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. Additional rainfall amounts up to 1 inch 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...
Dickson, Waverly, Centerville, McEwen, Pinewood, Nunnelly, Lyles
and Bon Aqua.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3608 8787 3617 8757 3609 8744 3588 8726
3572 8724 3572 8726 3571 8725 3570 8726
3569 8730 3567 8732 3566 8732 3566 8735
3566 8736 3565 8738 3562 8748 3563 8751
3563 8754 3590 8768
FLASH FLOOD...RADAR INDICATED
$$
072 follow-up statements
393
WGUS54 KOHX 211104
FFWOHX
TNC043-081-085-211300-
/O.EXT.KOHX.FF.W.0048.000000T0000Z-210821T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
604 AM CDT Sat Aug 21 2021
The National Weather Service in Nashville has extended the
* Flash Flood Warning for...
Southwestern Dickson County in middle Tennessee...
Hickman County in middle Tennessee...
Northeastern Humphreys County in middle Tennessee...
* Until 800 AM CDT.
* At 604 AM CDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2.5 and 5
inches of rain have fallen. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Dickson, Waverly, Centerville, McEwen, Pinewood, Nunnelly, Lyles
and Bon Aqua.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3608 8787 3617 8757 3609 8744 3588 8726
3572 8724 3572 8726 3571 8725 3570 8726
3569 8730 3567 8732 3566 8732 3566 8736
3565 8738 3562 8748 3563 8751 3563 8754
3590 8768
FLASH FLOOD...OBSERVED
$$
10417
WGUS74 KOHX 211220
FFSOHX
Flash Flood Statement
National Weather Service Nashville TN
720 AM CDT Sat Aug 21 2021
TNC043-081-085-211300-
/O.CON.KOHX.FF.W.0048.000000T0000Z-210821T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dickson TN-Hickman TN-Humphreys TN-
720 AM CDT Sat Aug 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING
FOR SOUTHWESTERN DICKSON, HICKMAN AND NORTHEASTERN HUMPHREYS
COUNTIES...
At 720 AM CDT, emergency management reported thunderstorms producing
heavy rain across the warned area. Between 3 and 6 inches of rain
have fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Emergency management reported.
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, McEwen, Pinewood, Nunnelly, Lyles
and Bon Aqua.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3608 8787 3617 8757 3609 8744 3588 8726
3572 8724 3572 8726 3571 8725 3570 8726
3569 8730 3567 8732 3566 8732 3566 8736
3565 8738 3562 8748 3563 8751 3563 8754
3590 8768
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
10The 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, 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, 4:55 PM CDT | Flash Flood Warning | OHX | Dickson, Hickman, Houston, Humphreys | 6 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.