Flash Flood Warning 56, NWS Indianapolis, IN

085 
WGUS53 KIND 122059
FFWIND
INC005-130030-
/O.EXT.KIND.FF.W.0056.000000T0000Z-260813T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Indianapolis has extended the

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

* Until 830 PM EDT.

* At 459 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 4 inches of rain 
  have fallen. 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...
  Columbus, Edinburgh, Hope, Elizabethtown, Hartsville, Clifford, 
  Jonesville, Taylorsville, Azalia, Newbern, Grammer and 
  Waymansville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3934 8609 3935 8568 3913 8569 3913 8580
      3907 8580 3907 8582 3905 8586 3904 8586
      3904 8608

FLASH FLOOD...RADAR INDICATED

$$

Eckhoff

664 
WGUS73 KIND 130020
FFSIND

Flash Flood Statement
National Weather Service Indianapolis IN
820 PM EDT Wed Aug 12 2026

INC005-130030-
/O.CAN.KIND.FF.W.0056.000000T0000Z-260813T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bartholomew IN-
820 PM EDT Wed Aug 12 2026

...FLASH FLOOD WARNING FOR BARTHOLOMEW COUNTY HAS BEEN REPLACED WITH 
A FLOOD WARNING...

Flash Flood threat has ended for the warned area but a flooding 
threat continues.

&&

LAT...LON 3934 8609 3935 8568 3913 8569 3913 8580
      3907 8580 3907 8582 3905 8586 3904 8586
      3904 8608

$$

KF

Area Forecast Discussion...UPDATED
National Weather Service Indianapolis IN
1041 AM EDT Wed Aug 12 2026

.KEY MESSAGES...

- Marginally severe storms through daybreak along with potential
  additional flooding

- Flood Watch continues through today with additional strong to
  severe storms through the day, mainly during the afternoon

- Damaging winds will be the main threat today outside of flooding

- Storm chances continue through the rest of the week, severe
  weather threat looks lower

&&

.MESOSCALE UPDATE...
Issued at 1041 AM EDT Wed Aug 12 2026

Mesoscale forcing is maximized from near Kokomo southeastward
through Anderson, Muncie and New Castle where a subtle midlevel
thermal/moisture gradient exist. Recent radar trends have shown and
increase in convection in this area. With mean flow parallel to
this, deep warm cloud layer, and anomalous moisture, training heavy
rain-producing convective elements will likely continue in the near
term resulting in significant flash flooding potential in this
corridor.

&&

.DISCUSSION (Today through Tuesday)...
Issued at 133 AM EDT Wed Aug 12 2026

Overview.

Active weather continues into today with additional rounds of showers
and thunderstorms. A few storms could produce localized heavy rain
and strong gusty winds this afternoon and evening with best chances
across southwest Indiana. A front associated with the system will
gradually move south into early Thursday with additional marginally
severe storms through Friday. Rain chances generally look lower for
the weekend with the jet stream further north into the Great Lakes.

Rest of Tonight.

The main focus through the remainder of the overnight hours will
be additional thunderstorm development across eastern Indiana with
the LLJ ramping up. Storm coverage has been gradually increasing
over the last 2 hours with heavy rain being the main threat along
with occasional pulses leading to small hail. General expectations
are for these storms to grow upscale and move to the southeast
with additional flooding from Madison County south to Decatur
county. With the storms not backbuilding as much as they were
initially, flash flooding should remain isolated with broader
areal flooding being the main threat.

Wednesday Through Thursday.

Indiana remains locked into northwesterly flow with broad ridging
across the Central Plains and broad troughing across the Great
Lakes. Shortwaves within the upper level flow will continue to bring
periods of showers and storms  with upper-level forcing along the
exit region of a 50-60 kt mid-level jet streak aloft. A weak surface
front currently across northern Indiana is expected to slowly move
south through the day but generally will only have minimal impacts
on storm coverage timing as much of the forcing is being driven by
the jet level forcing aloft.

WAA and boundary layer heating will yield MLCAPE values ranging
between 2500-3500 J/kg again today, supported by steep lapse rates
exceeding 7.5 C/km above the boundary layer. While 0-6 km bulk shear
vector magnitudes are modest at 25-35 kt, orientation roughly 45
degrees to the initiating boundary favors mixed mode convective
structures, including multicellular clusters and bowing segments.
HREF 2-5 km UH probability sweeps show maximum signal concentrated
across central and southern Indiana between 21Z and 03Z with storms
moving in from the west. Elevated DCAPE values above 1000 J/kg
suggest damaging wind gusts will be the primary severe hazard, with
steep mid-level lapse rates occasionally supporting isolated severe
hail. PWATs nearing 1.8 to 2.0 inches, well above the 90th
percentile, will support efficient warm-rain processes and localized
torrential rainfall. Ahead of the stronger storms, initiation is
likely across northern Indiana during the early morning hours today,
but CAMs continue to struggle with properly diagnosing the current
boundaries and impacts from the front, so confidence is lower on any
impacts through the morning hours.

Additional flooding looks likely, especially in areas that saw
heavy rain during the overnight hours. LPMMs show pockets of 2-3
inches beyond what already fell, but confidence is very low in
where this may occur with broader model spread on the location of
the axis of heaviest rain. Thus, will keep the Flood Watch through
04Z and reevaluate later today.

Convection will clear the southern CWA border late tonight as the
surface cold front gradually drifts into closer to the Ohio River.
Forecast confidence is fairly low into Thursday with more
significant model divergence on the broader synoptic pattern and how
the residual front may impact conditions. North of the front,
temperatures will be much cooler with highs in the upper 70s to near
80 with minimal instability, while areas to the south of the front
are likely to end up near 90. The severe threat generally should be
on the warmer side with any convection to the north remaining
elevated.

Friday Through Tuesday.

The broad synoptic regime during the extended period will feature a
transition from post-frontal surface high pressure to mid-level
ridge amplification across the Central Mississippi and Ohio Valleys.
The 00Z GEFS and EPS are in have decent agreement through 00Z
Monday, with the ridge over the Plains strengthening and pushing the
jet stream further north into the Great Lakes. Daytime highs will
climb from the lower 80s on Friday to the upper 80s and low 90s by
Sunday as return southerly flow returns. Rain chances generally
should remain limited to just the northern counties, but even that
looks low.

By Monday into Tuesday, ensemble guidance indicates a northern
stream trough traversing the Canadian Prairies into the Great Lakes
region, acting to flatten the mid-level ridge and push a surface
cold front toward the lower Great Lakes. Guidance exhibits typical
timing disparities regarding frontal passage dynamics, with the
ECMWF and EPS ensemble mean slightly slower than the GFS and GEFS
composite. Low-level moisture return along a re-establishing 30 kt
LLJ will bring PWATs back toward 1.5-1.7 inches. Chance POPs have
been maintained for Monday afternoon through Tuesday to account for
scattered frontal convection driven by weak height falls and low-
level convergence.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 706 AM EDT Wed Aug 12 2026

Impacts:

- Isolated showers or a stray storm cannot be ruled out near IND
  this morning along with MVFR ceilings

- Additional convection later today, confidence highest towards mid
  afternoon

- Fog development expected tonight, especially near LAF/HUF

Discussion:

Brief fog development will be possible through 13Z near LAF/HUF.
Isolated showers or a stray storm cannot be ruled out near IND
this morning along with MVFR ceilings. Additional storms are
likely later today followed up by more widespread strong to severe
storms in the afternoon and evening, mainly towards BMG/IND/HUF.
Brief MVFR or worse conditions are possible with any
thunderstorms. Outside of convection, winds will generally be
south or southwesterly at 5-10kts through the TAF period.

Fog development is expected by late tonight, especially near HUF/LAF.

The LAF ASOS is currently out of service, so no AMDs are scheduled
beyond typical TAF issuances due to low confidence on present
weather.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
Flood Watch through this evening for INZ021-028>031-035>049-
054>057-063>065-072.

&&

MESOSCALE...BRB
AVIATION...Melo
DISCUSSION...White

Hazardous Weather Outlook
National Weather Service Indianapolis IN
1111 AM EDT Wed Aug 12 2026

INZ021-028>031-035>049-051>057-060>065-067>072-131515-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-
Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-
Martin-Lawrence-Jackson-Jennings-
1111 AM EDT Wed Aug 12 2026

This hazardous weather outlook is for central Indiana.

.DAY ONE...Through Tonight.

Flooding and flash flooding will continue across eastern Indiana.
More showers and storms are expected. This may result in additional
flooding or a worsening of ongoing flooding.

Damaging winds will also be possible with thunderstorms this
afternoon and into the evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible at times through the week, with
potential for multiple rounds of severe storms through at least
Thursday. Damaging winds and heavy rainfall will be the primary
threats.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to remain vigilant this week as multiple rounds
of severe storms will be possible.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

JP

Special Weather Statement
National Weather Service Indianapolis IN
131 PM EDT Wed Aug 12 2026

INZ051-121800-
Vigo IN-
131 PM EDT Wed Aug 12 2026

...Strong thunderstorms will impact portions of Vigo County through
200 PM EDT...

At 130 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Clinton to near Vermilion to 7 miles northeast
of Marshall. Movement was east at 20 mph.

HAZARD...Wind gusts up to 50 mph, frequent lightning, very heavy
         rainfall, and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Terre Haute, West Terre Haute, Prairieton, Seelyville, Riley,
Fontanet, Shepardsville, Pimento, North Terre Haute, Indiana State
University, and Sandford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
west central Indiana.

&&

LAT...LON 3935 8753 3961 8753 3961 8720 3952 8720
      3952 8724 3938 8724 3927 8733 3935 8755
TIME...MOT...LOC 1730Z 283DEG 17KT 3966 8738 3954 8751 3946 8758

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

BRB

Preliminary Local Storm Report
National Weather Service Indianapolis IN
135 PM EDT Wed Aug 12 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1232 PM     Flash Flood      4 SSE Muncie            40.15N 85.36W
08/12/2026                   Delaware           IN   Dept of Highways

            Flooding causing road closure between Old IN
            3...IN 67 and US 35.

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
137 PM EDT Wed Aug 12 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0806 AM     Flash Flood      1 ESE Blountsville      40.05N 85.23W
08/12/2026                   Henry              IN   Dept of Highways

            US 35 is closed due to flooding between US
            36 near Losantville and Main St in
            Blountsville.

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
140 PM EDT Wed Aug 12 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 AM     Flash Flood      Mount Summit            40.00N 85.39W
08/12/2026                   Henry              IN   Dept of Highways

            IN 3 southbound lanes are closed due to
            flooding.

&&

BH

Special Weather Statement
National Weather Service Indianapolis IN
204 PM EDT Wed Aug 12 2026

INZ047-048-055>057-065-121830-
Rush IN-Johnson IN-Decatur IN-Shelby IN-Hancock IN-Marion IN-
204 PM EDT Wed Aug 12 2026

...Strong thunderstorms will impact portions of Shelby, southern
Hancock, Rush, northwestern Decatur, Johnson and southeastern Marion
Counties through 230 PM EDT...

At 203 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Greenfield to Greenwood to 6 miles southeast of
Mooresville. Movement was east at 55 mph.

HAZARD...Wind gusts up to 50 mph and very heavy rainfall causing
         flash flooding.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs down and blow
         around unsecured objects. Saturated soil could cause
         uprooted trees.

Locations impacted include...
Indianapolis, Shelbyville, Greenwood, Franklin, Greenfield, Beech
Grove, Rushville, Southport, New Whiteland, Cumberland, Edinburgh,
Whiteland, Bargersville, Knightstown, New Palestine, Flat Rock,
Princes Lakes, Geneva, Morristown, and Trafalgar.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms will cause
dangerous flash flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
central, south central and east central Indiana.

&&

LAT...LON 3935 8563 3934 8625 3963 8625 3979 8593
      3979 8530 3954 8530
TIME...MOT...LOC 1803Z 274DEG 49KT 3979 8576 3962 8611 3955 8627

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

BRB

Special Weather Statement
National Weather Service Indianapolis IN
209 PM EDT Wed Aug 12 2026

INZ045-051>054-060-061-121845-
Clay IN-Owen IN-Morgan IN-Putnam IN-Greene IN-Vigo IN-Sullivan IN-
209 PM EDT Wed Aug 12 2026

...Strong thunderstorms will impact portions of southern Vigo,
northwestern Morgan, Sullivan, Clay, northwestern Owen, northwestern
Greene and southern Putnam Counties through 245 PM EDT...

At 208 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Brazil to 11 miles south of Terre Haute to near
Hutsonville. Movement was east at 35 mph.

HAZARD...Wind gusts up to 50 mph, frequent lightning, very heavy
         rain, and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Terre Haute, Brazil, Sullivan, Jasonville, Cloverdale, Shelburn,
Prairieton, Prairie Creek, Farmersburg, Seelyville, Knightsville,
Clay City, Hymera, Fairbanks, Harmony, Staunton, Center Point, Merom,
Riley, and Quincy.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
central, southwestern and west central Indiana.

&&

LAT...LON 3917 8764 3922 8757 3925 8757 3925 8760
      3930 8760 3930 8762 3934 8759 3934 8756
      3937 8753 3961 8707 3960 8655 3929 8689
      3897 8745 3903 8757 3906 8757 3909 8762
      3910 8761 3911 8765 3912 8763 3913 8766
TIME...MOT...LOC 1808Z 271DEG 30KT 3952 8712 3931 8739 3916 8761

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

BRB