Alert archive / Indiana / Flash Flood Warnings in 2026

Flash Flood Warning 39, NWS Indianapolis, IN

August 12, 2026Decatur County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Aug 12, 2026, 3:57 AM EDT for Decatur County, Indiana. It was in force for 9 hr. 3 reports 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 12, 2026, 3:57 AM EDT (07:57 UTC)
Expired
Aug 12, 2026, 1:00 PM EDT
In force
9 hr
Issued by
NWS Indianapolis, IN
Area
Storm-based polygon
Flood severity
None

County Decatur County, IN

The radar

The Indianapolis radar (KIND), 80 km from the middle of the area, began a volume at 08:01 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
Aug 12, 4:54 AM EDTFLASH FLOODGreensburg, INSeveral flooded roads with at least one having water flowing over it. No specific location in the county noted.
Aug 12, 4:54 AM EDTFLASH FLOODGreensburg, INSeveral flooded roads with at least one having water flowing over it. No specific location in the county noted.
Aug 12, 4:54 AM EDTFLASH FLOODGreensburg, INSeveral flooded roads with at least one having water flowing over it. No specific location in the county noted.

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 00:00Z, 8.0 hours before the alert went out and 149 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, Cncnati-Daytn, OH at 00:00Z on 2026-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2026-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
12 J/kg
Mixed-layer CIN
-355 J/kg
Mixed-layer LCL
997 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
258 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted.

400 
WGUS53 KIND 120757
FFWIND
INC031-121400-
/O.NEW.KIND.FF.W.0039.260812T0757Z-260812T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
357 AM EDT Wed Aug 12 2026

The National Weather Service in Indianapolis has issued a

* Flash Flood Warning for...
  Decatur County in central Indiana...

* Until 1000 AM EDT Wednesday.

* At 357 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.75 and 1.75 inches of 
  rain have fallen. The expected rainfall rate is 0.5 to 1 inch in 1 
  hour. Additional rainfall amounts of 0.5 to 1.25 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...
  Greensburg, Adams, Milford, Millhousen, Letts, Newpoint and Burney.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3915 8552 3926 8565 3935 8564 3935 8563
      3941 8563 3940 8530 3927 8530

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

AW
2 follow-up statements
697 
WGUS73 KIND 121004
FFSIND

Flash Flood Statement
National Weather Service Indianapolis IN
604 AM EDT Wed Aug 12 2026

INC031-121400-
/O.CON.KIND.FF.W.0039.000000T0000Z-260812T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Decatur IN-
604 AM EDT Wed Aug 12 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 AM EDT THIS 
MORNING FOR DECATUR COUNTY...

At 604 AM EDT, local law enforcement reported flash flooding across 
the county, especially in the southern portions. Between 3 and 6 
inches of rain have fallen. The expected rainfall rate is 0.25 to 1 
inch in 1 hour. Additional rainfall amounts of 0.5 to 1.25 inches 
are possible in the warned area. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Greensburg, Adams, Milford, Millhousen, Letts, Newpoint and Burney.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3915 8552 3926 8565 3935 8564 3935 8563
      3941 8563 3940 8530 3927 8530

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...0.25-1 INCH IN 1 HOUR

$$

AW
101 
WGUS53 KIND 121345 RRD
FFWIND
INC031-121700-
/O.EXT.KIND.FF.W.0039.000000T0000Z-260812T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
945 AM EDT Wed Aug 12 2026

The National Weather Service in Indianapolis has extended the

* Flash Flood Warning for...
  Decatur County in central Indiana...

* Until 100 PM EDT.

* At 945 AM EDT, local law enforcement reported thunderstorms 
  producing heavy rain across the warned area. Between 3 and 6 
  inches of rain have fallen. The expected rainfall rate is 0.25 to 
  1 inch in 1 hour. Additional rainfall amounts of 0.5 to 1.25 
  inches are possible in the warned area. Flash flooding is already 
  occurring.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Law enforcement reported.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Greensburg, Adams, Milford, Millhousen, Letts, Newpoint and Burney.

Numerous flooded roadways have been reported across the region. Do 
not drive into flood waters.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3941 8563 3940 8530 3927 8530 3922 8539
      3920 8543 3920 8544 3918 8547 3917 8550
      3915 8552 3926 8565 3935 8564 3935 8563

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...0.25-1 INCH IN 1 HOUR

$$

Eckhoff

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 11, 8:48 PM EDTAreal Flood AdvisoryINDClay, Owen, Parke, Putnam, Vermillion, Vigo2 hr
Aug 11, 8:56 PM EDTSpecial Weather StatementINDPutnam34 min
Aug 11, 9:21 PM EDTSevere Thunderstorm WarningINDHendricks, Morgan, Owen, Putnam39 min
Aug 11, 9:41 PM EDTAreal Flood AdvisoryINDHendricks, Morgan, Owen, Parke, Putnam3 hr
Aug 11, 10:02 PM EDTSpecial Weather StatementINDMorgan43 min
Aug 11, 11:10 PM EDTSpecial Weather StatementINDShelby35 min
Aug 11, 11:13 PM EDTSevere Thunderstorm WarningINDHancock, Johnson, Marion, Shelby32 min
Aug 11, 11:44 PM EDTSpecial Weather StatementINDShelby31 min
Aug 11, 11:55 PM EDTSevere Thunderstorm WarningINDHancock, Rush, Shelby35 min
Aug 12, 12:31 AM EDTAreal Flood AdvisoryINDHancock, Johnson, Marion, Shelby3 hr
Aug 12, 12:41 AM EDTFlash Flood WarningINDShelby12 hr
Aug 12, 12:54 AM EDTAreal Flood AdvisoryINDDecatur, Rush, Shelby117 min
Aug 12, 1:55 AM EDTAreal Flood AdvisoryINDHenry, Rush51 min
Aug 12, 1:56 AM EDTAreal Flood WarningINDDecatur, Jennings, Shelby4 hr
Aug 12, 2:18 AM EDTAreal Flood AdvisoryINDHoward, Madison, Tipton7 hr
Aug 12, 2:31 AM EDTFlash Flood WarningINDDelaware, Henry, Madison3 hr
Aug 12, 2:41 AM EDTAreal Flood AdvisoryINDDelaware, Henry, Randolph3 hr
Aug 12, 2:46 AM EDTFlash Flood WarningINDHenry, Rush3 hr
Aug 12, 2:51 AM EDTFlash Flood WarningINDDecatur, Rush, Shelby3 hr
Aug 12, 3:14 AM EDTFlash Flood WarningINDHenry2 hr
Aug 12, 4:34 AM EDTFlash Flood Warning Considerable damage threatINDHenry, Rush8 hr
Aug 12, 5:24 AM EDTFlash Flood WarningINDDecatur, Rush8 hr
Aug 12, 5:34 AM EDTFlash Flood WarningINDDelaware, Henry, Randolph7 hr
Aug 12, 5:53 AM EDTAreal Flood WarningINDDecatur, Jennings, Shelby2 hr
Aug 12, 6:20 AM EDTRiver Flood WarningINDCarroll, Tippecanoe, White5 days
Aug 12, 6:20 AM EDTRiver Flood WarningINDCarroll, White16 hr
Aug 12, 6:20 AM EDTRiver Flood WarningINDFountain, Parke, Tippecanoe, Vermillion, Warren7 days
Aug 12, 7:26 AM EDTAreal Flood AdvisoryINDHancock, Rush2 hr
Aug 12, 8:11 AM EDTFlash Flood WarningINDDecatur, Jennings, Shelby5 hr
Aug 12, 8:23 AM EDTRiver Flood WarningINDDelaware, Madison4 days
Aug 12, 8:30 AM EDTRiver Flood WarningINDHamilton, Madison6 days
Aug 12, 8:48 AM EDTAreal Flood AdvisoryINDBartholomew, Jennings, Shelby60 min
Aug 12, 9:14 AM EDTAreal Flood WarningINDMadison33 min
Aug 12, 9:47 AM EDTFlash Flood Warning EmergencyINDMadison12 hr
Aug 12, 9:48 AM EDTAreal Flood WarningINDBartholomew, Jennings, Shelby9 hr
Aug 12, 9:49 AM EDTAreal Flood WarningINDHancock, Rush9 hr
Aug 12, 10:17 AM EDTFlash Flood Warning EmergencyCatastrophic damage threatINDDelaware12 hr
Aug 12, 10:26 AM EDTFlash Flood WarningINDHoward, Tipton12 hr
Aug 12, 10:28 AM EDTRiver Flood WarningINDJackson, Jennings, Washington19 hr
Aug 12, 10:28 AM EDTRiver Flood WarningINDShelby4 days
Aug 12, 10:28 AM EDTRiver Flood WarningINDJackson, Lawrence, Washington7 days
Aug 12, 10:28 AM EDTRiver Flood WarningINDBartholomew4 days
Aug 12, 10:28 AM EDTRiver Flood WarningINDBartholomew, Jackson4 days
Aug 12, 10:28 AM EDTRiver Flood WarningINDBartholomew, Johnson, Shelby5 days
Aug 12, 10:42 AM EDTRiver Flood WarningINDHamilton, Marion6 days
Aug 12, 10:42 AM EDTRiver Flood WarningINDMarion, Morgan7 days
Aug 12, 10:42 AM EDTRiver Flood WarningINDMarion, Morgan6 days
Aug 12, 10:46 AM EDTFlash Flood Warning EmergencyCatastrophic damage threatINDHenry12 hr
Aug 12, 10:54 AM EDTRiver Flood WarningINDDelaware, Randolph4 days
Aug 12, 11:29 AM EDTRiver Flood WarningINDFountain, Parke, Vermillion, Warren12 days
Aug 12, 11:29 AM EDTRiver Flood WarningINDParke, Vermillion, Vigo15 days
Aug 12, 11:45 AM EDTSpecial Weather StatementINDFountain, Warren30 min
Aug 12, 12:01 PM EDTSevere Thunderstorm WarningINDFountain, Warren44 min
Aug 12, 12:13 PM EDTSevere Thunderstorm WarningINDBoone, Carroll, Clinton, Howard, Montgomery, Tippecanoe52 min
Aug 12, 12:42 PM EDTSpecial Weather StatementINDParke, Vermillion33 min
Aug 12, 12:47 PM EDTSpecial Weather StatementINDBrown28 min
Aug 12, 12:58 PM EDTFlash Flood Warning Considerable damage threatINDRush11 hr
Aug 12, 12:58 PM EDTFlash Flood Warning Considerable damage threatINDDecatur11 hr
Aug 12, 12:58 PM EDTFlash Flood Warning Considerable damage threatINDRandolph11 hr
Aug 12, 12:58 PM EDTFlash Flood WarningINDShelby7 hr
Aug 12, 12:58 PM EDTFlash Flood WarningINDHancock7 hr
Aug 12, 12:59 PM EDTAreal Flood WarningINDBartholomew, Jennings3 hr
Aug 12, 1:00 PM EDTSpecial Weather StatementINDBoone, Hamilton30 min
Aug 12, 1:02 PM EDTFlash Flood WarningINDBoone, Hamilton7 hr
Aug 12, 1:02 PM EDTSpecial Weather StatementINDHoward, Tipton28 min
Aug 12, 1:11 PM EDTSpecial Weather StatementINDParke34 min
Aug 12, 1:20 PM EDTFlash Flood WarningINDHendricks, Marion7 hr
Aug 12, 1:28 PM EDTSpecial Weather StatementINDPutnam32 min
Aug 12, 1:31 PM EDTSpecial Weather StatementINDVigo29 min
Aug 12, 1:39 PM EDTSevere Thunderstorm WarningINDHendricks, Johnson, Marion, Morgan, Putnam36 min
Aug 12, 2:04 PM EDTSpecial Weather StatementINDJohnson, Rush, Shelby26 min
Aug 12, 2:09 PM EDTRiver Flood WarningINDHoward4 days
Aug 12, 2:09 PM EDTSpecial Weather StatementINDClay, Sullivan, Vigo36 min
Aug 12, 2:11 PM EDTFlash Flood WarningINDJohnson5 hr
Aug 12, 2:17 PM EDTSevere Thunderstorm WarningINDDecatur, Johnson, Rush, Shelby58 min
Aug 12, 2:28 PM EDTFlash Flood WarningINDBartholomew6 hr
Aug 12, 2:30 PM EDTSpecial Weather StatementINDBartholomew, Brown, Decatur30 min
Aug 12, 2:35 PM EDTSevere Thunderstorm WarningINDDaviess, Greene, Knox, Sullivan40 min
Aug 12, 2:42 PM EDTRiver Flood WarningINDCarroll, Howard4 days
Aug 12, 2:42 PM EDTSevere Thunderstorm WarningINDDaviess, Knox, Sullivan48 min

Nearby

Flash Flood Warnings in Indiana, 2026Every flash flood warning in 2026

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.