Flash Flood Warning 59, NWS Indianapolis, IN

479 
WGUS53 KIND 140854
FFWIND
INC035-135-141400-
/O.EXT.KIND.FF.W.0059.000000T0000Z-260814T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
454 AM EDT Fri Aug 14 2026

The National Weather Service in Indianapolis has extended the

* Flash Flood Warning for...
  Southeastern Delaware County in east central Indiana...
  Central Randolph County in east central Indiana...

* Until 1000 AM EDT.

* At 454 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.75 and 3 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...
  Muncie, Winchester, Parker City, Farmland, Selma and Ridgeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4031 8509 4031 8505 4007 8481 4008 8522
      4020 8538 4020 8522 4031 8522

FLASH FLOOD...RADAR INDICATED

$$

Nield

Area Forecast Discussion
National Weather Service Indianapolis IN
1034 PM EDT Thu Aug 13 2026

.KEY MESSAGES...

- Heavy rain and localized flash flooding remain the primary concern
  today, especially across north central Indiana into the overnight.

- Continued Rain tonight and on Friday will worsen an already
  very significant flooding event.

- A few severe thunderstorms are possible this afternoon with damaging
  wind is gusts as a storm complex moves in from the west

- Additional storm chances continue Friday into Saturday as a warm
  front lifts north followed by a cold front over the weekend

- Warmer and more humid conditions return Saturday before drier and
  cooler weather settles in Sunday through early next week

&&

.FORECAST UPDATE...
Issued at 1034 PM EDT Thu Aug 13 2026

Rain cooled air covers much of central Indiana this evening with
temperatures in the lower to middle 70s and dewpoints in the 70s. A
surface boundary remains across northern portions of the forecast
area, with northeast winds to the north of the boundary and
southeast winds south of the boundary.

The atmosphere remains quite moist with 00Z ILX and ILN soundings
showing precipitable water values between 1.75 and 2 inches.
Increasing 850mb flow will interact with the surface boundary to the
north to aid in convective development. Some upper energy will add
additional forcing. Will go high PoPs across the northern forecast
area overnight with lower PoPs to the south.

Elevated instability remains decent. This along with decent shear
will keep the threat for some severe storms during the night as
well.

The main concern will be heavy rain and flash flooding. CAMs can
sometimes struggle and produce very high rainfall amounts with
nocturnal events, and the 00Z HRRR shows amounts over 4 inches in
the northern forecast area by 12Z. Meanwhile the 01Z is lower and
farther northwest with the highest amounts. Thus, CAMs cannot be
taken literally as they change from run to run. They can show areas
to watch for though.

However, the 12Z HREF and REFS local probability matched means show
the threat for heavy rainfall over the northern forecast area
including the hardest hit areas from previous rains. Even a couple
of inches in the hardest hit areas will have significant impact.

Have continued messaging of the threat for additional heavy rainfall
and additional/worsening flooding.

&&

.DISCUSSION (This evening through Thursday)...
Issued at 227 PM EDT Thu Aug 13 2026

Surface analysis this afternoon shows a trough axis across
central IL to the northern parts of Central Indiana. The convective
complex has advanced to Central IL. Radar shows a few scattered
thunderstorms ahead of this line pushing across eastern IL. Dew
points have surged to the 70s, but temperatures have been a bit slow
to rise due to cloud cover.

Tonight...

Uncertainty exist with he progression of the thunderstorm cluster
over IL. This system appears to be moving in to a less favorable
environment, due to morning clouds, but with the afternoon heating,
the environment is becoming more favorable for continued progression
to the ESE.

The continued NW flow aloft and another short wave are expect
overnight. This will generate showers and thunderstorm once again
overnight. Models show favorable isentropic lift setting up ahead of
the short wave overnight particularly along and north of LAF to
Rushville Axis. Given our very high dew points showers and storms
will be efficient rain producers and 1-2 inches of rain with
isolated higher amounts cannot be ruled out. Forecast soundings show
a saturated column with very high pwats over 2.2 inches overnight.
Additional rainfall over already flooded area may worsen the
situation. Thus will be using high pops tonight, focusing the best
timing from mid evening through 08Z.

Friday and Friday Night...

Models continue to suggest ridging riding forcing dynamics
continuing to pass across Central Indiana on Friday, with the
favorable air mass still in place along with the trough axis slowly
moving south across Indiana. Forecast soundings on Friday remain
saturated with very pwats still above 2 inches as lift and
instability remain in place. Thus will continue high pops through
the day again on Friday and Friday night, with best chances to
remain along and near and I-74 corridor.

Saturday and Saturday Night...

Forecast soundings are shown to dry out on Saturday and Saturday
night as convective temperatures become unreachable. However a very
warm and humid air mass will remain in place which may result in
need for a heat advisory as mid 90s will be possible. Models hint
that the best forcing path will push to the north and more limited
embedded waves look to pass. Thus should there be any diurnal
convection, best chances would be across the already soaked northern
parts of the forecast area.

Sunday and Sunday Night...

Rain chances look to persist on Sunday as a cold front will push
across Central Indiana though the afternoon and into the evening.
Upper levels suggest a continued WNW flow with a weak short wave
passing through the afternoon to provide forcing. Warm and humid air
will be in place ahead of this system. Thus plenty of factors in
play to support pops. Cold front is suggested to sag southward to
the Ohio River by late Sunday Night and precip should end near that
time.

Monday through Thursday...

Models suggest continue WNW flow in place aloft during this time,
but little in the way of forcing dynamics appear to be in play.
Meanwhile during this time, cooler high pressure in the wake of
Sunday's cold front will be pushing across Indiana and through the
region. This will lead to lower dewpoints and cooler highs. Forecast
soundings show a dry column through Wednesday morning as these
features pass.

On Wednesday afternoon and into Thursday the surface high will be
departing to the southeast. This will allow another surface boundary
over the Great Lakes to sag southward across Indiana at this time.
By this time, southerly return flow will have allowed warmer and
more humid air to arrive across Central Indiana. Furthermore, the
flow aloft looks to become more NW as ridging over the western US
becomes more amplified. Although the signal for embedded waves
within this flow is unclear at this time, given the pattern,
embedded waves providing forcing appears plausible. Thus pops and
warmer temperatures will be used.

&&

.AVIATION (00Z TAF Issuance)...
Issued at 732 PM EDT Thu Aug 13 2026

Impacts:

- Mainly VFR conditions expected for most of this evening, and
  again by Friday afternoon.

- Showers and thunderstorms developing after 04Z north of
  I-74/I-69 spreading southward overnight. IFR visibilities and
  MVFR ceilings likely with these storms.

Discussion:

VFR flight conditions will prevail for most of this evening in the
wake of this afternoon's thunderstorms. Another round of storms is
expected to develop late this evening over northern Indiana, and
move southward overnight. IFR visibilities in heavy rain and MVFR
ceilings are likely with these storms. The lower ceilings could
persist outside of storms into the morning. Areas along and north
of I-70 will have the best chance for lingering ceilings at or
below 3000 feet Friday, though it's possible the lower ceilings
could get farther south. Scattered showers may also linger into
the daylight hours of Friday morning. Low ceilings should lift and
scatter by early Friday afternoon.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
Flood Watch through Friday evening for INZ021-028>031-035>049-
051>057-060>065-069>072.

&&

UPDATE...50
AVIATION...Carney
DISCUSSION...Puma

Hazardous Weather Outlook
National Weather Service Indianapolis IN
317 PM EDT Thu Aug 13 2026

INZ021-028>031-035>049-051>057-060>065-067>072-141930-
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-
317 PM EDT Thu Aug 13 2026

This hazardous weather outlook is for central Indiana.

.DAY ONE...Through Tonight.

Flooding will continue across mainly eastern portions of central
Indiana. Some portions of the Upper White River and Big Blue River
may reach major flood stage.

Strong to severe storms will be possible this afternoon and evening
with damaging winds as the main threat. Flash flooding then looks
likely through the overnight, mainly across the I-74 corridor.

Heavy Rain is possible along and north of the I-74 corridor tonight.
This may result in flooding and flash flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Heavy Rain is possible along and north of the I-74 corridor on Friday.
This may result in flooding and flash flooding.

Thunderstorms will be possible at times through the weekend along
with continued river flooding.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to remain vigilant this week as multiple rounds
of severe storms will be possible. Report incidents of Flooding. Do
not enter flooded areas.

&&

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

Preliminary Local Storm Report
National Weather Service Indianapolis IN
708 PM EDT Thu Aug 13 2026

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

0605 PM     Tstm Wnd Dmg     Columbus                39.21N 85.91W
08/13/2026                   Bartholomew        IN   Emergency Mngr

            Reports of multiple poles snapped along
            Trestle Drive...River Road...and Cunningham
            Drive...all north of 25th Street in
            Columbus. At least 10 poles...one of which
            may have held the civil defense siren.

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
1232 AM EDT Fri Aug 14 2026

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

1219 AM     Hail             Summitville             40.33N 85.65W
08/14/2026  E1.50 Inch       Madison            IN   Public

            Report from mPING. Time estimated from
            radar.

&&

AW