Alert archive / Indiana / River Flood Warnings in 2026

River Flood Warning 46, NWS Northern Indiana

August 12, 2026Adams County, Wells County, Indiana

NWS Northern Indiana issued this river flood warning at Aug 12, 2026, 4:35 PM EDT for Adams County, Wells County, Indiana. It took effect at Aug 13, 2026, 1:24 AM EDT. It was in force for 9 days.

The area

The counties it named.

The facts

Issued: Aug 12, 2026, 4:35 PM EDT (20:35 UTC)
In effect from: Aug 13, 2026, 1:24 AM EDT
Expired: Aug 21, 2026, 9:16 PM EDT
In force: 9 days
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Flood severity: Minor

Counties Adams County, IN, Wells County, IN

The radar

The Northern Indiana radar (KIWX), 86 km from the middle of the area, began a volume at 20:35 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 river

Written for the forecast point Wabash River at Linn Grove (LYNI3).

Action stage: 9 ft
Minor stage: 11 ft
Moderate stage: 14 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 03322900, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this river flood warning went out at Aug 12, 1:58 PM EDT, 2 hours 37 minutes earlier. Its key messages:

Showers/thunderstorms will continue to move through the area this afternoon but will see chances for precipitation diminish into the evening.
A flood watch remains in effect for areas along and south of US-30 through 11 PM EDT.
Patchy fog will be possible overnight tonight into Thursday morning.
Periods of showers/thunderstorms will be possible over the next several days, especially during the afternoon hours.

Area forecast discussion, Aug 12, 1:58 PM EDT, 2 hours 37 minutes before

Area Forecast Discussion
National Weather Service Northern Indiana
158 PM EDT Wed Aug 12 2026

.KEY MESSAGES...

- Showers/thunderstorms will continue to move through the area
  this afternoon but will see chances for precipitation
  diminish into the evening.

- A flood watch remains in effect for areas along and south of
  US-30 through 11 PM EDT.

- Patchy fog will be possible overnight tonight into Thursday
  morning.

- Periods of showers/thunderstorms will be possible over the
  next several days, especially during the afternoon hours.

&&

.DISCUSSION...
Issued at 120 PM EDT Wed Aug 12 2026

Well another day of showers/thunderstorms today with thankfully
less severity with less impressive environmental conditions
available to work with. However, the flooding impacts seem to be
the main concern going into this afternoon/evening period with
another stratiform rain event in the wake of this afternoons
eastward progression of a linear storm feature. A swath of storm
totals over the last several days of 5 to 10 inches of rainfall
across our western parts of the CWA around Pulaski County in
Indiana and orientated southeastward down into the Grant,
Blackford, and Jay Counties in Indiana. A Flash Flood Watch
continues for areas mainly south of US-30 until 11 PM EDT
tonight as additional rainfall will exacerbate any flooding
impacts in these areas.

The good news is we should see a break in the precipitation
tonight and through Thursday morning which will help to let
things dry out a bit. However, this break will also increase
chances of misty and foggy conditions overnight with the very
moist surface layer from the recent rainfall along with light
and variable winds across the area. Confidence on the areal
coverage is not high at this time but where fog does develop
could become dense at least for a short period.

With the pesky zonal upper level pattern still status quo
thorough at least the next several days we will have periods of
increased chances of showers and storms each day especially in
the afternoon to evening periods. Temperatures also looks to
remain seasonable during this forecast period.

&&

.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 120 PM EDT Wed Aug 12 2026

MVFR/IFR vsbys with a line of thunderstorms as it continues to
move eastward through the area this afternoon which may be
heavy at times especially for KFWA as an area of stratiform
rainfall moves in behind the main line of storms before
diminishing around 23-00z this evening. Gusty winds up to 35 kts
will be possible with any of the thunderstorms. Around 00z a
short period of VFR conditions is expected before the potential
for MVFR/IFR vsbys/cigs in mist/fog develops overnight with
light winds and still very moist surface conditions with the
recent rainfall. Periods of LIFR vsbys/cigs will be possible.
Confidence on the exact coverage and intensity is not high but
seems likely there will be at least patchy fog coverage.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Flood Watch until 11 PM EDT /10 PM CDT/ this evening for
     INZ012>015-017-018-020-022>027-032>034-116-203-216.
OH...Flood Watch until 11 PM EDT this evening for OHZ024-025.
MI...None.
MARINE...None.

&&

DISCUSSION...Andersen
AVIATION...Andersen

In the hours before

Local storm report, Aug 12, 4:04 PM EDT, 31 minutes before

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Local storm report, Aug 12, 4:06 PM EDT, 29 minutes before

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Local storm report, Aug 12, 4:14 PM EDT, 21 minutes before

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Local storm report, Aug 12, 4:16 PM EDT, 19 minutes before

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Local storm report, Aug 12, 4:20 PM EDT, 15 minutes before

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Local storm report, Aug 12, 4:23 PM EDT, 12 minutes before

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The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 1:51 AM EDT	Special Weather Statement	IWX	Miami	39 min
Aug 12, 3:34 AM EDT	Special Weather Statement	IWX	Adams	26 min
Aug 12, 5:00 AM EDT	Flash Flood Watch	IWX	White	4 days
Aug 12, 5:13 AM EDT	Areal Flood Advisory	IWX	Blackford, Grant, Huntington, Jay, Wells	3 hr
Aug 12, 6:52 AM EDT	Areal Flood Advisory	IWX	Grant	3 hr
Aug 12, 11:22 AM EDT	Severe Thunderstorm Warning	IWX	Cass, Fulton, Pulaski, White	53 min
Aug 12, 11:29 AM EDT	Special Marine Warning	IWX		72 min
Aug 12, 11:34 AM EDT	Flash Flood Warning	IWX	Adams, Blackford, Cass, Fulton, Grant, Huntington and 9 more	3 hr
Aug 12, 11:47 AM EDT	River Flood Warning	IWX	Blackford, Huntington, Jay, Wabash, Wells	37 hr
Aug 12, 11:47 AM EDT	River Flood Warning	IWX	Grant, Miami, Wabash	53 hr
Aug 12, 11:51 AM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Starke	39 min
Aug 12, 11:57 AM EDT	Severe Thunderstorm Warning	IWX	Kosciusko, Whitley	33 min
Aug 12, 12:08 PM EDT	Severe Thunderstorm Warning	IWX	Cass, White	40 min
Aug 12, 12:28 PM EDT	Severe Thunderstorm Warning	IWX	Fulton, LaPorte, Marshall, Saint Joseph, Starke	23 min
Aug 12, 2:58 PM EDT	Flash Flood Warning	IWX	Blackford, Cass, Grant, Jay, Miami, Pulaski and 2 more	5 hr
Aug 12, 7:19 PM EDT	River Flood Warning	IWX	Wells	4 days
Aug 12, 9:13 AM EDT	Special Weather Statement	IWX	Van Wert	32 min
Aug 12, 9:30 AM EDT	Severe Thunderstorm Warning	IWX	Allen	30 min
Aug 12, 10:18 AM EDT	Special Weather Statement	IWX	Allen	27 min

Nearby

River Flood Warnings in Indiana, 2026 Every river 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.