Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 50, NWS Louisville, KY

August 30, 2021Dubois County, Indiana

NWS Louisville, KY issued this flash flood warning at Aug 30, 2021, 5:35 PM EDT for Dubois County, Indiana. It was in force for 4 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: Aug 30, 2021, 5:35 PM EDT (21:35 UTC)
Expired: Aug 30, 2021, 9:39 PM EDT
In force: 4 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

County Dubois County, IN

The radar

The Evansville,IN radar (KVWX), 79 km from the middle of the area, began a volume at 21:38 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

Time	Report	Where	Remark
Aug 30, 5:44 PM EDT	FLASH FLOOD	Dubois, IN	SIGNIFICANT STREET FLOODING IN THE TOWN OF DUBOIS. GYMNASIUM FLOODED AT THE INTERMEDIATE SCHOOL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.6 hours before the alert went out and 243 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: 295 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

As transmitted.

730 
WGUS53 KLMK 302135
FFWLMK
INC037-310045-
/O.NEW.KLMK.FF.W.0050.210830T2135Z-210831T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Louisville has issued a

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

* Until 845 PM EDT.

* At 535 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 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...
  Jasper, Dubois, Dubois Crossroads, Kellerville, Crystal, Ellsworth 
  and Cuzco.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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 3846 8691 3849 8681 3850 8669 3841 8669
      3836 8697 3841 8695

FLASH FLOOD...RADAR INDICATED

$$

RJS

2 follow-up statements

434 
WGUS53 KLMK 302340
FFWLMK
INC037-310145-
/O.EXT.KLMK.FF.W.0050.000000T0000Z-210831T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Louisville has extended the

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

* Until 945 PM EDT.

* At 740 PM EDT, emergency management reported flash flooding of 
  numerous streets in the town of Dubois. Significant flooding of 
  the gymnasium at the intermediate school was also occurring. 
  Between 3 and 6 inches of rain have fallen. Flash flooding is 
  already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  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, Dubois, Dubois Crossroads, Kellerville, Crystal, Ellsworth 
  and Cuzco.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

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 3846 8691 3849 8681 3850 8669 3841 8669
      3836 8697 3841 8695

FLASH FLOOD...OBSERVED

$$

EBW

471 
WGUS73 KLMK 310139
FFSLMK

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

INC037-310149-
/O.CAN.KLMK.FF.W.0050.000000T0000Z-210831T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dubois IN-
939 PM EDT Mon Aug 30 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN 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 3846 8691 3849 8681 3850 8669 3841 8669
      3836 8697 3841 8695

$$

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, 6:38 PM EDT	Areal Flood Advisory	LMK	Orange, Washington	3 hr
Aug 30, 7:06 PM EDT	Flash Flood Warning	LMK	Dubois	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.