Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 51, NWS Louisville, KY

August 30, 2021Dubois County, Indiana

NWS Louisville, KY issued this flash flood warning at Aug 30, 2021, 7:06 PM EDT for Dubois County, Indiana. It was in force for 3 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: Aug 30, 2021, 7:06 PM EDT (23:06 UTC)
Expired: Aug 30, 2021, 9:41 PM EDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

County Dubois County, IN

The radar

The Evansville,IN radar (KVWX), 73 km from the middle of the area, began a volume at 23:09 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, 11.1 hours before the alert went out and 247 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: 437 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1082 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

141 
WGUS53 KLMK 302306
FFWLMK
INC037-310215-
/O.NEW.KLMK.FF.W.0051.210830T2306Z-210831T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Louisville KY
706 PM EDT Mon Aug 30 2021

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Dubois County in south central Indiana...

* Until 1015 PM EDT.

* At 706 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. The expected rainfall rate is 
  2.5 to 4.5 inches in 1 hour. 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...
  Jasper, Huntingburg, Ferdinand, Holland, Birdseye, Bretzville, 
  Maltersville, Saint Anthony, Saint Marks and Huntingburg Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you 
can do so safely and have them relay your report to the National 
Weather Service in Louisville.

&&

LAT...LON 3843 8707 3847 8690 3841 8695 3836 8697
      3841 8668 3825 8668 3825 8679 3821 8679
      3820 8707

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2.5-4.5 INCHES IN 1 HOUR

$$

EBW

1 follow-up statement

205 
WGUS73 KLMK 310141
FFSLMK

Flash Flood Statement
National Weather Service Louisville KY
941 PM EDT Mon Aug 30 2021

INC037-310151-
/O.CAN.KLMK.FF.W.0051.000000T0000Z-210831T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dubois IN-
941 PM EDT Mon Aug 30 2021

...FLASH FLOOD WARNING IS CANCELLED FOR DUBOIS COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3843 8707 3847 8690 3841 8695 3836 8697
      3841 8668 3825 8668 3825 8679 3821 8679
      3820 8707

$$

EBW

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 12:29 PM EDT	Special Weather Statement	LMK	Floyd, Harrison	46 min
Aug 30, 12:47 PM EDT	Areal Flood Advisory	LMK	Clark, Crawford, Floyd, Harrison, Washington	3 hr
Aug 30, 1:04 PM EDT	Flash Flood Warning	LMK	Clark, Floyd, Harrison	96 min
Aug 30, 4:33 PM EDT	Areal Flood Advisory	LMK	Perry	117 min
Aug 30, 5:24 PM EDT	Areal Flood Advisory	LMK	Dubois	2 hr
Aug 30, 5:35 PM EDT	Flash Flood Warning	LMK	Dubois	4 hr
Aug 30, 6:38 PM EDT	Areal Flood Advisory	LMK	Orange, Washington	3 hr
Aug 30, 7:34 PM EDT	Flash Flood Warning	LMK	Orange, Washington	2 hr

Nearby

Flash Flood Warnings in Indiana, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.