Alert archive / Tennessee / Flash Flood Watches in 2021
Flash Flood Watch 4, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at Jul 19, 2021, 2:04 AM CDT for Giles County, Lawrence County, Wayne County, Tennessee. It took effect at Jul 20, 2021, 3:00 AM CDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jul 19, 2021, 2:04 AM CDT (07:04 UTC)
- In effect from
- Jul 20, 2021, 3:00 AM CDT
- Expired
- Jul 19, 2021, 2:38 AM CDT
- In force
- Issued by
- NWS Nashville, TN
- Flood severity
- None
Counties Giles County, TN, Lawrence County, TN, Wayne County, TN
The radar
The Northeast Alabama radar (KHTX), 125 km from the middle of the area, began a volume at 07:05 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, 7.1 hours before the alert went out and 125 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
- 151 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
861 WGUS64 KOHX 190704 FFAOHX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Nashville TN 204 AM CDT Mon Jul 19 2021 TNZ093>095-191515- /O.NEW.KOHX.FF.A.0004.210720T0800Z-210720T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Wayne-Lawrence-Giles- Including the cities of Pulaski, Clifton, Lawrenceburg, and Waynesboro 204 AM CDT Mon Jul 19 2021 ...FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY AFTERNOON... The National Weather Service in Nashville has issued a * Flash Flood Watch for a portion of Middle Tennessee, including the following areas, Giles, Lawrence and Wayne. * From late tonight through Tuesday afternoon. * Up to 3 to 5 inches of rainfall has fallen across the watch area. One half to one inch of additional rainfall is possible through this afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 21
1 follow-up statement
984 WGUS64 KOHX 190738 FFAOHX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Nashville TN 238 AM CDT Mon Jul 19 2021 TNZ093>095-191545- /O.CAN.KOHX.FF.A.0004.210720T0800Z-210720T2300Z/ /O.NEW.KOHX.FF.A.0005.210719T0800Z-210719T2300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Wayne-Lawrence-Giles- Including the cities of Clifton, Waynesboro, Lawrenceburg, and Pulaski 238 AM CDT Mon Jul 19 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON... ...FLASH FLOOD WATCH FOR LATE TONIGHT THROUGH TUESDAY AFTERNOON IS CANCELLED... The National Weather Service in Nashville has issued a * Flash Flood Watch for a portion of Middle Tennessee, including the following areas, Giles, Lawrence, and Wayne. * Through this afternoon * Up to 3 to 5 inches of rainfall has fallen across the watch area. One half to one inch of additional rainfall is possible through this afternoon. * PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 21
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:19 PM CDT | Areal Flood Advisory | OHX | Fentress | 116 min |
| Jul 18, 7:34 PM CDT | Areal Flood Advisory | OHX | Giles, Lawrence, Wayne | 3 hr |
| Jul 18, 8:03 PM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 11 hr |
| Jul 18, 8:30 PM CDT | Areal Flood Advisory | OHX | Jackson, Overton, Putnam | 2 hr |
| Jul 19, 12:40 AM CDT | Areal Flood Advisory | OHX | Giles, Lawrence, Lewis, Perry, Wayne | 7 hr |
| Jul 19, 2:38 AM CDT | Flash Flood Watch | OHX | Giles, Lawrence, Wayne | 15 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.