Alert archive / Tennessee / Flash Flood Warnings in 2021

Flash Flood Warning 71, NWS Nashville, TN

October 6, 2021Giles County, Tennessee

NWS Nashville, TN issued this flash flood warning at Oct 6, 2021, 7:48 PM CDT for Giles County, Tennessee. It was in force for 5 hr. 1 report 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
Oct 6, 2021, 7:48 PM CDT (00:48 UTC)
Expired
Oct 7, 2021, 12:45 AM CDT
In force
5 hr
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Flood severity
None

County Giles County, TN

The radar

The Northeast Alabama radar (KHTX), 99 km from the middle of the area, began a volume at 00:49 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

TimeReportWhereRemark
Oct 6, 8:10 PM CDTFLOOD3 E Minor Hill, TNCOWHORNE HOLLOW ROAD AND MARVIN HUGHES ROAD CLOSED DUE TO WATER OVER ROADWAY.

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, 0.8 hours before the alert went out and 128 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2021-10-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 595 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-10-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
595 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
871 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted.

181 
WGUS54 KOHX 070048
FFWOHX
TNC055-070415-
/O.NEW.KOHX.FF.W.0071.211007T0048Z-211007T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
748 PM CDT Wed Oct 6 2021

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Southwestern Giles County in middle Tennessee...

* Until 1115 PM CDT.

* At 748 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 1.5 inches 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...
  Minor Hill and Goodspring.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3503 8722 3519 8713 3516 8706 3500 8706
      3501 8722

FLASH FLOOD...RADAR INDICATED

$$

FB
2 follow-up statements
058 
WGUS74 KOHX 070222
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
922 PM CDT Wed Oct 6 2021

TNC055-070415-
/O.CON.KOHX.FF.W.0071.000000T0000Z-211007T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Giles TN-
922 PM CDT Wed Oct 6 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT THIS 
EVENING FOR SOUTHWESTERN GILES COUNTY...

At 922 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 3 inches of rain have 
fallen. The stronger storms that prompted the warning have moved 
away from the area.  Additional rainfall amounts less than 1 inch 
are possible in the warned area. Flash flooding is ongoing and 
should to recede through 11 pm.

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...
  Minor Hill and Goodspring.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3503 8722 3519 8713 3516 8706 3500 8706
      3501 8722

FLASH FLOOD...RADAR INDICATED

$$

FB
437 
WGUS54 KOHX 070406
FFWOHX
TNC055-070545-
/O.EXT.KOHX.FF.W.0071.000000T0000Z-211007T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
1106 PM CDT Wed Oct 6 2021

The National Weather Service in Nashville has extended the

* Flash Flood Warning for...
  Southwestern Giles County in middle Tennessee...

* Until 1245 AM CDT.

* At 1106 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 5.5 inches of 
  rain have fallen. The storms that have prompted the heavy rainfall 
  will continue to move out of the area through 12:30 am.  
  Additional rainfall amounts up to 1 inch are possible in the 
  warned area. Flash flooding is already occurring.

  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...
  Minor Hill and Goodspring.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3503 8722 3519 8713 3516 8706 3500 8706
      3501 8722

FLASH FLOOD...RADAR INDICATED

$$

FB

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 6, 7:04 PM CDTSpecial Weather StatementOHXRutherford41 min
Oct 6, 7:11 PM CDTAreal Flood AdvisoryOHXCumberland, Fentress, Pickett3 hr
Oct 6, 7:12 PM CDTSevere Thunderstorm WarningOHXDickson, Hickman33 min
Oct 6, 7:14 PM CDTTornado WarningOHXFentress31 min
Oct 6, 7:16 PM CDTAreal Flood AdvisoryOHXPutnam, White3 hr
Oct 6, 7:22 PM CDTAreal Flood AdvisoryOHXDeKalb, Warren, White3 hr
Oct 6, 7:32 PM CDTAreal Flood AdvisoryOHXHumphreys, Perry3 hr
Oct 6, 7:44 PM CDTAreal Flood AdvisoryOHXBedford, Rutherford3 hr
Oct 6, 7:44 PM CDTSevere Thunderstorm WarningOHXFentress, Pickett26 min
Oct 6, 7:54 PM CDTSpecial Weather StatementOHXCoffee51 min
Oct 6, 8:07 PM CDTAreal Flood AdvisoryOHXDavidson, Maury, Williamson113 min
Oct 6, 8:17 PM CDTSpecial Weather StatementOHXHumphreys28 min
Oct 6, 8:28 PM CDTAreal Flood AdvisoryOHXHumphreys4 hr
Oct 6, 8:52 PM CDTFlash Flood WarningOHXCumberland, Fentress, Overton, Pickett, Putnam, White3 hr
Oct 6, 8:56 PM CDTFlash Flood WarningOHXHumphreys, Perry4 hr
Oct 6, 8:59 PM CDTFlash Flood WarningOHXPerry, Wayne4 hr
Oct 6, 9:15 PM CDTAreal Flood AdvisoryOHXCoffee, Grundy, Warren3 hr
Oct 6, 10:24 PM CDTFlash Flood WarningOHXBedford3 hr
Oct 6, 10:40 PM CDTAreal Flood AdvisoryOHXHouston, Humphreys, Montgomery3 hr
Oct 6, 10:56 PM CDTAreal Flood AdvisoryOHXBedford, Cannon, Coffee, Rutherford3 hr
Oct 6, 10:57 PM CDTSpecial Weather StatementOHXCannon33 min
Oct 6, 11:35 PM CDTAreal Flood AdvisoryOHXCannon, DeKalb, Rutherford, Smith, Wilson3 hr
Oct 7, 12:24 AM CDTAreal Flood AdvisoryOHXDeKalb, Jackson, Putnam, Smith, Trousdale, Wilson2 hr
Oct 7, 1:45 AM CDTRiver Flood AdvisoryOHXBedford8 hr
Oct 7, 9:29 AM CDTRiver Flood AdvisoryOHXPerry20 hr

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.