Alert archive / Tennessee / Flash Flood Watches in 2021
Flash Flood Watch 8, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at Sep 15, 2021, 5:55 AM CDT for 25 counties in Tennessee. It took effect at Sep 15, 2021, 7:00 AM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Sep 15, 2021, 5:55 AM CDT (10:55 UTC)
- In effect from
- Sep 15, 2021, 7:00 AM CDT
- Expired
- Sep 15, 2021, 3:56 PM CDT
- In force
- 9 hr
- Issued by
- NWS Nashville, TN
- Flood severity
- None
All 25 counties
Cheatham County, TN, Clay County, TN, Davidson County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 41 km from the middle of the area, began a volume at 10:57 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.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 10.9 hours before the alert went out and 31 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
- 1408 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1076 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- -40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
114 WGUS64 KOHX 151055 FFAOHX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Nashville TN 555 AM CDT Wed Sep 15 2021 TNZ005>010-023>031-056>062-093>095-152115- /O.NEW.KOHX.FF.A.0008.210915T1200Z-210916T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Houston-Humphreys- Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-Perry- Hickman-Lewis-Williamson-Maury-Marshall-Rutherford-Wayne-Lawrence- Giles- Including the cities of Goodlettsville, Carthage, Smyrna, McEwen, Clarksville, Pulaski, La Vergne, Springfield, Linden, Waverly, Columbia, Brentwood, Nashville, Kingston Springs, Ashland City, Dickson, Waynesboro, Hendersonville, Murfreesboro, New Johnsonville, Lafayette, Franklin, Gainesboro, Hartsville, Lewisburg, Tennessee Ridge, Centerville, Dover, Lawrenceburg, Lobelville, Mount Juliet, Lebanon, Clifton, Celina, South Carthage, Hohenwald, Gordonsville, Erin, and Gallatin 555 AM CDT Wed Sep 15 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... The National Weather Service in Nashville has issued a * Flash Flood Watch for a portion of Middle Tennessee, including the following areas, Cheatham, Clay, Davidson, Dickson, Giles, Hickman, Houston, Humphreys, Jackson, Lawrence, Lewis, Macon, Marshall, Maury, Montgomery, Perry, Robertson, Rutherford, Smith, Stewart, Sumner, Trousdale, Wayne, Williamson and Wilson. * Through this evening. * 1 To 2 inches will be common, but a quick 3 to 4 inches will be possible in a few places which could lead to Flash Flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 27
1 follow-up statement
924 WGUS64 KOHX 152056 FFAOHX Flood Watch National Weather Service Nashville TN 356 PM CDT Wed Sep 15 2021 TNZ005>010-023>031-056>062-093>095-152200- /O.CAN.KOHX.FF.A.0008.000000T0000Z-210916T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Houston-Humphreys- Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-Perry- Hickman-Lewis-Williamson-Maury-Marshall-Rutherford-Wayne-Lawrence- Giles- Including the cities of Goodlettsville, Carthage, Smyrna, McEwen, Clarksville, Pulaski, La Vergne, Springfield, Linden, Waverly, Columbia, Brentwood, Nashville, Kingston Springs, Ashland City, Dickson, Waynesboro, Hendersonville, Murfreesboro, New Johnsonville, Lafayette, Franklin, Gainesboro, Hartsville, Lewisburg, Tennessee Ridge, Centerville, Dover, Lawrenceburg, Lobelville, Mount Juliet, Lebanon, Clifton, Celina, South Carthage, Hohenwald, Gordonsville, Erin, and Gallatin 356 PM CDT Wed Sep 15 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for a portion of Middle Tennessee, including the following areas, Cheatham, Clay, Davidson, Dickson, Giles, Hickman, Houston, Humphreys, Jackson, Lawrence, Lewis, Macon, Marshall, Maury, Montgomery, Perry, Robertson, Rutherford, Smith, Stewart, Sumner, Trousdale, Wayne, Williamson and Wilson has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. $$ 10
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 8:23 AM CDT | Areal Flood Advisory | OHX | Dickson, Hickman, Lewis, Maury, Perry, Williamson | 4 hr |
| Sep 15, 9:33 AM CDT | Flash Flood Warning | OHX | Dickson, Hickman, Lewis, Maury, Perry, Williamson | 117 min |
| Sep 15, 10:08 AM CDT | Areal Flood Advisory | OHX | Cheatham, Davidson, Dickson, Robertson, Sumner | 3 hr |
| Sep 15, 2:20 PM CDT | Areal Flood Advisory | OHX | Clay, Jackson, Macon, Overton, Pickett, Putnam and 2 more | 3 hr |
| Sep 15, 2:57 PM CDT | Areal Flood Advisory | OHX | DeKalb, Jackson, Putnam, Smith, White | 2 hr |
Nearby
Flash Flood Watches in Tennessee, 2021Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.