Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 52, NWS Louisville, KY

August 30, 2021Orange County, Washington County, Indiana

NWS Louisville, KY issued this flash flood warning at Aug 30, 2021, 7:34 PM EDT for Orange County, Washington County, Indiana. It was in force for 2 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, 7:34 PM EDT (23:34 UTC)
Expired: Aug 30, 2021, 9:43 PM EDT
In force: 2 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Orange County, IN, Washington County, IN

The radar

The Louisville radar (KLVX), 82 km from the middle of the area, began a volume at 23:34 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, 8:27 PM EDT	FLASH FLOOD	1 Ene Prospect, IN	SEVERAL REPORTS OF FLOODED ROADWAYS OR ROADS CLOSED DUE TO FLOODING ACROSS THE COUNTY, INCLUDING ORANGEVILLE ROAD NEAR PROSPECT.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.6 hours before the alert went out and 224 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: 185 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

667 
WGUS53 KLMK 302334
FFWLMK
INC117-175-310245-
/O.NEW.KLMK.FF.W.0052.210830T2334Z-210831T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Louisville has issued a

* Flash Flood Warning for...
  Orange County in south central Indiana...
  Washington County in south central Indiana...

* Until 1045 PM EDT.

* At 734 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3.5 inches of 
  rain have fallen. Additional rainfall amounts of 0.5 to 1 inch 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...
  Salem, Paoli, Orleans, French Lick, Stampers Creek, Orangeville, 
  Campbellsburg, West Baden Springs, Little York and Livonia.

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 3848 8640 3839 8668 3869 8668 3869 8631
      3873 8631 3874 8629 3877 8628 3877 8620
      3878 8620 3876 8614 3877 8610 3878 8609
      3876 8603 3876 8594 3875 8590 3873 8589
      3859 8589 3852 8614

FLASH FLOOD...RADAR INDICATED

$$

EBW

2 follow-up statements

167 
WGUS73 KLMK 310042
FFSLMK

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

INC117-175-310245-
/O.CON.KLMK.FF.W.0052.000000T0000Z-210831T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange IN-Washington IN-
842 PM EDT Mon Aug 30 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT THIS 
EVENING FOR ORANGE AND WASHINGTON COUNTIES...

At 842 PM EDT, local law enforcement reported multiple flooded and 
closed roadways due to thunderstorms producing heavy rain across the 
warned area. Between 2 and 4 inches of rain have fallen. Additional 
rainfall amounts of 0.5 to 1 inch are possible in the warned area.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement 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...
  Salem, Paoli, Orleans, French Lick, Stampers Creek, Orangeville, 
  Campbellsburg, West Baden Springs, Little York and Livonia.

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 3848 8640 3839 8668 3869 8668 3869 8631
      3873 8631 3874 8629 3877 8628 3877 8620
      3878 8620 3876 8614 3877 8610 3878 8609
      3876 8603 3876 8594 3875 8590 3873 8589
      3859 8589 3852 8614

FLASH FLOOD...OBSERVED

$$

EBW/DM

671 
WGUS73 KLMK 310143
FFSLMK

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

INC117-175-310153-
/O.CAN.KLMK.FF.W.0052.000000T0000Z-210831T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orange IN-Washington IN-
943 PM EDT Mon Aug 30 2021

...FLASH FLOOD WARNING IS CANCELLED FOR ORANGE AND WASHINGTON 
COUNTIES...

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

LAT...LON 3848 8640 3839 8668 3869 8668 3869 8631
      3873 8631 3874 8629 3877 8628 3877 8620
      3878 8620 3876 8614 3877 8610 3878 8609
      3876 8603 3876 8594 3875 8590 3873 8589
      3859 8589 3852 8614

$$

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, 7:06 PM EDT	Flash Flood Warning	LMK	Dubois	3 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.