Alert archive / Indiana / Flash Flood Warnings in 2026
Flash Flood Warning 13, NWS Indianapolis, IN
NWS Indianapolis, IN issued this flash flood warning at Jun 21, 2026, 6:30 PM EDT for Decatur County, Indiana. It was in force for 5 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
- Jun 21, 2026, 6:30 PM EDT (22:30 UTC)
- Expired
- Jun 21, 2026, 11:36 PM EDT
- In force
- 5 hr
- Issued by
- NWS Indianapolis, IN
- Area
- Storm-based polygon
- Flood severity
- Moderate
County Decatur County, IN
The radar
The Indianapolis radar (KIND), 87 km from the middle of the area, began a volume at 22:33 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.5 hours before the alert went out and 140 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1433 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
125
WGUS53 KIND 212230
FFWIND
INC031-220800-
/O.NEW.KIND.FF.W.0013.260621T2230Z-260622T0800Z/
/00000.2.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
630 PM EDT Sun Jun 21 2026
The National Weather Service in Indianapolis has issued a
* Flash Flood Warning for...
A controlled damn breach of Lake McCoy Dam will flood Cobbs Fork
in...
Central Decatur County in central Indiana...
* Until 400 AM EDT Monday.
* At 630 PM EDT, emergency management reported the imminent failure
of Lake McCoy Dam.
HAZARD...Flash flooding from the imminent controlled breach of
Lake McCoy Dam.
SOURCE...Emergency management reported.
IMPACT...Flooding of areas downstream from the Lake McCoy Dam
along Cobbs Fork.
This includes the following streams and drainages...
Jordan Creek, Cobbs Fork and Sand Creek.
The flood wave will move down Cobbs Fork beginning at Boulevard
Road...crossing Indiana Route 46 to the south.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you are in low lying areas below the Lake McCoy Dam you should
move to higher ground immediately.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3932 8539 3928 8540 3924 8547 3927 8549
3933 8540 3933 8539
FLASH FLOOD...OBSERVED
DAM FAILURE...IMMINENT
$$
AGM2 follow-up statements
711
WGUS73 KIND 212239
FFSIND
Flash Flood Statement
National Weather Service Indianapolis IN
639 PM EDT Sun Jun 21 2026
INC031-220800-
/O.CON.KIND.FF.W.0013.000000T0000Z-260622T0800Z/
/00000.2.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Decatur IN-
639 PM EDT Sun Jun 21 2026
...FLASH FLOOD WARNING FOR A DAM FLOODGATE RELEASE REMAINS IN EFFECT
UNTIL 4 AM EDT MONDAY FOR CENTRAL DECATUR COUNTY...
At 639 PM EDT, emergency management reported the floodgates on the
Lake McCoy Dam were opened causing flash flooding downstream on the
Cobbs Fork.
HAZARD...Flash flooding from the imminent controlled breach of
Lake McCoy Dam.
SOURCE...Emergency management reported.
IMPACT...Flooding of areas downstream from the Lake McCoy Dam
along Cobbs Fork.
This includes the following streams and drainages...
Jordan Creek, Cobbs Fork and Sand Creek.
The flood wave will move down Cobbs Fork beginning at Boulevard
Road...crossing Indiana Route 46 to the south.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you are in low lying areas below the Lake McCoy Dam you should
move to higher ground immediately.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3932 8539 3928 8540 3924 8547 3927 8549
3933 8540 3933 8539
FLASH FLOOD...OBSERVED
$$
KF247
WGUS73 KIND 220336
FFSIND
Flash Flood Statement
National Weather Service Indianapolis IN
1136 PM EDT Sun Jun 21 2026
INC031-220346-
/O.CAN.KIND.FF.W.0013.000000T0000Z-260622T0800Z/
/00000.2.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Decatur IN-
1136 PM EDT Sun Jun 21 2026
...FLASH FLOOD WARNING FOR A CONTROLLED BREACH ON LAKE MCCOY IS
CANCELLED FOR CENTRAL DECATUR COUNTY...
The controlled breach was successful with potential downstream
impacts no longer expected.
&&
LAT...LON 3932 8539 3928 8540 3924 8547 3927 8549
3933 8540 3933 8539
$$
AWThe office that day
Everything else NWS Indianapolis, IN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 5:43 PM EDT | Tornado Warning | IND | Sullivan, Vigo | 47 min |
| Jun 21, 5:46 PM EDT | Severe Thunderstorm Warning | IND | Clay, Greene, Parke, Sullivan, Vermillion, Vigo | 59 min |
| Jun 21, 5:50 PM EDT | Areal Flood Advisory | IND | Sullivan, Vigo | 3 hr |
| Jun 21, 6:09 PM EDT | Tornado Warning | IND | Parke, Vermillion, Vigo | 21 min |
| Jun 21, 6:24 PM EDT | Tornado Warning | IND | Clay, Sullivan, Vigo | 33 min |
| Jun 21, 6:36 PM EDT | Severe Thunderstorm Warning | IND | Clay, Daviess, Greene, Hendricks, Knox, Martin and 9 more | 39 min |
| Jun 21, 6:36 PM EDT | Tornado Warning | IND | Knox, Sullivan | 39 min |
| Jun 21, 6:43 PM EDT | Flash Flood Warning | IND | Sullivan, Vigo | 3 hr |
| Jun 21, 6:49 PM EDT | Tornado Warning | IND | Clay, Owen | 26 min |
| Jun 21, 6:50 PM EDT | Tornado Warning | IND | Daviess, Knox | 25 min |
| Jun 21, 6:59 PM EDT | Areal Flood Advisory | IND | Sullivan | 3 hr |
| Jun 21, 7:04 PM EDT | Severe Thunderstorm Warning | IND | Brown, Greene, Jackson, Johnson, Lawrence, Monroe and 3 more | 41 min |
| Jun 21, 7:08 PM EDT | Tornado Warning | IND | Monroe, Morgan, Owen | 26 min |
| Jun 21, 7:12 PM EDT | Tornado Warning | IND | Daviess, Knox | 48 min |
| Jun 21, 7:17 PM EDT | Severe Thunderstorm Warning | IND | Daviess, Greene, Knox, Martin, Sullivan | 43 min |
| Jun 21, 7:23 PM EDT | Areal Flood Advisory | IND | Greene, Knox, Sullivan | 3 hr |
| Jun 21, 7:25 PM EDT | Tornado Warning | IND | Brown, Monroe, Morgan | 20 min |
| Jun 21, 7:27 PM EDT | Tornado Warning | IND | Daviess, Knox | 48 min |
| Jun 21, 7:30 PM EDT | Flash Flood Warning | IND | Greene, Knox, Sullivan | 3 hr |
| Jun 21, 7:31 PM EDT | Tornado Warning | IND | Morgan | 11 min |
| Jun 21, 7:42 PM EDT | Severe Thunderstorm Warning | IND | Bartholomew, Brown, Decatur, Jackson, Jennings, Johnson and 4 more | 48 min |
| Jun 21, 7:47 PM EDT | Severe Thunderstorm Warning | IND | Daviess, Lawrence, Martin | 43 min |
| Jun 21, 7:50 PM EDT | Areal Flood Advisory | IND | Greene, Monroe, Owen | 2 hr |
| Jun 21, 7:51 PM EDT | Tornado Warning | IND | Daviess, Lawrence, Martin | 39 min |
| Jun 21, 7:55 PM EDT | Areal Flood Advisory | IND | Daviess, Knox, Martin | 3 hr |
| Jun 21, 7:55 PM EDT | Tornado Warning | IND | Bartholomew, Brown | 20 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.