Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 49, NWS Nashville, TN
NWS Nashville, TN issued this flash flood warning at Aug 21, 2021, 4:49 AM CDT for 4 counties in Tennessee. It was in force for 3 hr. 6 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, 4:49 AM CDT (09:49 UTC)
- Expired
- Aug 21, 2021, 8:00 AM CDT
- In force
- 3 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 Nashville radar (KOHX), 73 km from the middle of the area, began a volume at 09:51 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, 7:00 AM CDT | FLASH FLOOD | Dickson, TN | HIGHWAY 46 NEAR COLLEGE STREET CLOSED DUE TO FLOODING. |
| 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 | Dickson, TN | COUNTY-WIDE, TOO MANY WATER RESCUES TO COUNT. NUMEROUS ROADS DAMAGED OR CLOSED ACROSS DICKSON COUNTY. |
| Aug 21, 8:03 AM CDT | FLASH FLOOD | 2 Ene Dickson, TN | HOMES FLOODING AROUND GREYSTONE GOLF CLUB IN DICKSON. |
| Aug 21, 8:09 AM CDT | FLASH FLOOD | 1 Se Dickson, TN | SEVERAL HOMES FLOODED ON ROYAL OAK DRIVE IN DICKSON. |
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, 9.8 hours before the alert went out and 67 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.
543
WGUS54 KOHX 210949
FFWOHX
TNC043-081-083-085-211300-
/O.NEW.KOHX.FF.W.0049.210821T0949Z-210821T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
449 AM CDT Sat Aug 21 2021
The National Weather Service in Nashville has issued a
* Flash Flood Warning for...
Dickson County in middle Tennessee...
Northeastern Hickman County in middle Tennessee...
Southeastern Houston County in middle Tennessee...
Northeastern Humphreys County in middle Tennessee...
* Until 800 AM CDT.
* At 449 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 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...
Dickson, White Bluff, Burns, Charlotte, Vanleer, Slayden, Bon Aqua
and Lyles.
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.
&&
LAT...LON 3620 8771 3632 8745 3624 8721 3602 8719
3597 8720 3597 8721 3596 8721 3584 8724
FLASH FLOOD...RADAR INDICATED
$$
101 follow-up statement
543
WGUS74 KOHX 211109
FFSOHX
Flash Flood Statement
National Weather Service Nashville TN
609 AM CDT Sat Aug 21 2021
TNC043-081-083-085-211300-
/O.CON.KOHX.FF.W.0049.000000T0000Z-210821T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dickson TN-Hickman TN-Houston TN-Humphreys TN-
609 AM CDT Sat Aug 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING
FOR DICKSON, NORTHEASTERN HICKMAN, SOUTHEASTERN HOUSTON AND
NORTHEASTERN HUMPHREYS COUNTIES...
At 609 AM CDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 3.5 and 6
inches of rain have fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Dickson, White Bluff, Burns, Charlotte, Vanleer, Slayden, Bon Aqua
and Lyles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3620 8771 3632 8745 3624 8721 3602 8719
3597 8720 3597 8721 3596 8721 3584 8724
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
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, 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, 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.