Alert archive / Tennessee / Flash Flood Warnings in 2020

Flash Flood Warning 13, NWS Nashville, TN

May 24, 2020Wayne County, Tennessee

NWS Nashville, TN issued this flash flood warning at May 24, 2020, 4:26 PM CDT for Wayne County, Tennessee. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 24, 2020, 4:26 PM CDT (21:26 UTC)
Expired: May 24, 2020, 6:27 PM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

County Wayne County, TN

The radar

The Nashville radar (KOHX), 162 km from the middle of the area, began a volume at 21:30 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 12:00Z, 9.4 hours before the alert went out and 152 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1366 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

409 
WGUS54 KOHX 242126
FFWOHX
TNC181-250030-
/O.NEW.KOHX.FF.W.0013.200524T2126Z-200525T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
426 PM CDT Sun May 24 2020

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Northwestern Wayne County in middle Tennessee...

* Until 730 PM CDT.

* At 426 PM 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...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Clifton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3542 8798 3542 8779 3526 8779 3526 8798
      3530 8798 3530 8800 3530 8802 3531 8801
      3532 8802 3533 8802 3534 8801 3535 8801
      3536 8802 3537 8801 3537 8802 3539 8803
      3539 8801 3539 8798 3540 8797 3541 8797

FLASH FLOOD...RADAR INDICATED

$$

Barnwell

1 follow-up statement

608 
WGUS74 KOHX 242327
FFSOHX

Flash Flood Statement
National Weather Service Nashville TN
627 PM CDT Sun May 24 2020

TNC181-242337-
/O.CAN.KOHX.FF.W.0013.000000T0000Z-200525T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne TN-
627 PM CDT Sun May 24 2020

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN WAYNE COUNTY...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3542 8798 3542 8779 3526 8779 3526 8798
      3530 8798 3530 8800 3530 8802 3531 8801
      3532 8802 3533 8802 3534 8801 3535 8801
      3536 8802 3537 8801 3537 8802 3539 8803
      3539 8801 3539 8798 3540 8797 3541 8797

$$

Barnwell

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 7:18 PM CDT	Special Weather Statement	OHX	Giles	27 min
May 23, 7:51 PM CDT	Special Weather Statement	OHX	Giles	24 min
May 24, 3:24 PM CDT	Areal Flood Advisory	OHX	Hickman, Lewis, Maury, Perry, Wayne	2 hr
May 24, 4:55 PM CDT	Areal Flood Advisory	OHX	Cheatham, Dickson	2 hr

Nearby

Flash Flood Warnings in Tennessee, 2020 Every flash flood warning in 2020

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.