Severe Thunderstorm Warning 333, NWS Indianapolis, IN

Area Forecast Discussion
National Weather Service Indianapolis IN
718 PM EDT Wed Aug 19 2026

.KEY MESSAGES...

- Flood Watch in effect through 8AM Thursday across the northern
half of central IN with localized flash flooding possible

- Scattered to numerous showers and storms are expected this
afternoon into tonight, isolated severe storms are possible

- Generally drier late this week through early next week, but there
is a chance for showers and storms late Friday into Saturday

&&

.DISCUSSION (This evening through Wednesday)...
Issued at 332 PM EDT Wed Aug 19 2026

As of this afternoon, scattered thunderstorms have popped up across
north-central Indiana. There is a marginal severe threat this
afternoon through the evening with isolated damaging winds
possible and some hail as well. With how saturated the ground is,
trees could more easily be knocked over.

Flooding continues to be the main threat for the forecast area
unfortunately. Some of these afternoon storms are already
producing rain rate of over 2 in/hr, across northern portion of
the forecast area. A flood watch is in effect through the morning.
Rivers and creeks are likely to rise again from this rain. Where
exact impacts occur will depend on which river basin the highest
amounts of rainfall fall. Models have been largely highlighting
that some of these highest amounts will fall over the White River
basin, which could lead to river points along the White within
Indianapolis to return to action stage by the weekend and can't
rule out a chance of brief return to Minor flooding too.

Rivers remain high across the area, continue avoiding flood waters
and stay out of rivers.

Behind the wave, northwest flow will become more dominate aloft as
upper high pressure builds over the desert SW and upper troughing
builds to the NE of the forecast area. Meanwhile at the surface,
weak high pressure will generally be in the region leading to a
mostly dry rest of the forecast period outside of periodic chances
for showers and storms. Saturday seems to be the next best chance of
precipitation but again, those are still low chances. Temperatures
throughout the forecast period will see highs in the upper 70s to
low/mid 80s and lows from the upper 50s to mid 60s.

&&

.AVIATION (00Z TAF Issuance)...
Issued at 717 PM EDT Wed Aug 19 2026

Impacts:

- Mainly scattered SHRA...isolated TSRA...through 06Z Thursday
- FG/low stratus likely by 08Z Thursday for most terminals

Discussion:

Weak cold front currently aligned from Detroit back through the Quad
Cities area will slowly pass central Indiana terminals by 12Z
Thursday.  Ahead of this boundary's slow motion, expect a west to
east area of numerous SHRA to slide from KLAF early this evening, to
KHUF/KBMG around 01Z-03Z...with more widely scattered -SHRA elsewhere
and otherwise.  Embedded, isolated TSRA will contain MVFR down to
brief IFR, although confidence only high enough for PROB30/ TEMPO
mention.  Fluctuating flight rules are likely in any stronger
convection through at least 04Z.

Post-frontal low stratus and/or BR/FG is likely to bring MVFR,
starting by 10Z...with IFR/worse possible, especially near areas
that receive the most rainfall tonight.  Winds outside of convective
cells to be sustained mainly under 7KT, shifting from southwesterly
early this evening...to north-northeasterly at most sites by 06Z.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
Flood Watch through Thursday morning for INZ021-028>031-035>049-
054>057.

&&

AVIATION...AGM
DISCUSSION...KF

Hazardous Weather Outlook
National Weather Service Indianapolis IN
350 PM EDT Wed Aug 19 2026

INZ021-028>031-035>049-054>057-202000-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Morgan-Johnson-Shelby-Rush-
350 PM EDT Wed Aug 19 2026

This hazardous weather outlook is for central Indiana.

.DAY ONE...Through Tonight.

Widespread minor to moderate river flooding will continue along the
Wabash, White, and East Fork White Rivers and adjacent lowlands.

A flood watch is in effect through 8 AM Thursday as training
thunderstorms over saturated soils could lead to localized flash
flooding. Isolated strong to severe storms are also possible with
primarily a damaging wind gust threat and potential for some hail.

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

Thunderstorms will be possible on Saturday. Severe weather is not
expected, but lightning is a hazard with any storm.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rainfall amounts or any severe
weather later today into tonight.

&&

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

INZ051>053-060>065-067>072-202000-
Vigo-Clay-Owen-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-
Daviess-Martin-Lawrence-Jackson-Jennings-
350 PM EDT Wed Aug 19 2026

This hazardous weather outlook is for central Indiana.

.DAY ONE...Through Tonight.

Widespread minor to moderate river flooding will continue along the
Wabash, White, and East Fork White Rivers and adjacent lowlands.

Scattered thunderstorms are possible late today into tonight. Isolated
strong to severe storms are also possible with primarily a damaging
wind gust threat and potential for some hail.

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

Thunderstorms will be possible on Saturday. Severe weather is not
expected, but lightning is a hazard with any storm.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rainfall amounts or any severe
weather later today into tonight.

&&

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
615 PM EDT Wed Aug 19 2026

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

0614 PM     Rain             1 NE Ball State Univers 40.21N 85.40W
08/19/2026  M1.70 Inch       Delaware           IN   Public

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
617 PM EDT Wed Aug 19 2026

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

0557 PM     Flood            Ball State University   40.20N 85.41W
08/19/2026                   Delaware           IN   Public

            Flooding on multiple streets including
            Wheeling and University.

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
628 PM EDT Wed Aug 19 2026

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

0620 PM     Hail             5 SSE Rossville         40.36N 86.56W
08/19/2026  E0.25 Inch       Clinton            IN   Trained Spotter

&&

BH

Special Weather Statement
National Weather Service Indianapolis IN
713 PM EDT Wed Aug 19 2026

INZ037-039-192345-
Boone IN-Hamilton IN-
713 PM EDT Wed Aug 19 2026

...A strong thunderstorm will impact portions of east central Boone
and central Hamilton Counties through 745 PM EDT...

At 712 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles west of Noblesville, or 20 miles southeast of Frankfort, moving
southeast at 25 mph.

HAZARD...Winds in excess of 40 mph and pea size 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...
Carmel, Noblesville, Westfield, Cicero, Sheridan, and Morse
Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4014 8586 4013 8586 3997 8619 4008 8635
      4018 8611
TIME...MOT...LOC 2312Z 293DEG 21KT 4011 8621

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

AGM

Preliminary Local Storm Report
National Weather Service Indianapolis IN
741 PM EDT Wed Aug 19 2026

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

0725 PM     Rain             1 SE Mulberry           40.34N 86.66W
08/19/2026  M2.80 Inch       Clinton            IN   Cocorahs

            Amount in 75 minutes. Flooding half a mile
            south of Mulberry.

&&

BH

Preliminary Local Storm Report
National Weather Service Indianapolis IN
742 PM EDT Wed Aug 19 2026

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

0715 PM     Tstm Wnd Gst     5 W Atlanta             40.22N 86.12W
08/19/2026  M60 MPH          Tipton             IN   CO-OP Observer

            Time is estimated.

&&

BH