Alert archive / Indiana / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 216, NWS Northern Indiana

July 27, 20266 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Jul 27, 2026, 4:48 PM EDT for 6 counties in Indiana. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 27, 2026, 4:48 PM EDT (20:48 UTC)
Expired: Jul 27, 2026, 5:30 PM EDT
In force: 42 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Adams County, IN, Blackford County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Wells County, IN

The radar

The Northern Indiana radar (KIWX), 89 km from the middle of the area, began a volume at 20:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 27, 12:42 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.8 hours before the alert went out and 182 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 423 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 937 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 27, 2:59 PM EDT, 1 hour 49 minutes earlier. Its key messages:

There is an Enhanced Risk for severe weather today. Clusters of strong to severe storms are expected this afternoon and evening. The greatest severe weather threat is expected from 2pm to 10pm EDT.
Damaging wind gusts of in excess of 70 mph are expected to be the main threat, with a few gusts as high as 80 mph possible. Isolated large hail to 1 to 2 inches in diameter is also possible across southwest Lower Michigan and northwest Indiana this afternoon. Isolated tornadoes are also possible.
Dry and seasonable Tuesday through Thursday.
High Swim Risk Tuesday for southeast Lake Michigan beaches.

Area forecast discussion, Jul 27, 2:59 PM EDT, 1 hour 49 minutes before

Area Forecast Discussion
National Weather Service Northern Indiana
259 PM EDT Mon Jul 27 2026

.KEY MESSAGES...

- There is an Enhanced Risk for severe weather today. Clusters
  of strong to severe storms are expected this afternoon and
  evening. The greatest severe weather threat is expected from
  2pm to 10pm EDT.

- Damaging wind gusts of in excess of 70 mph are expected to be
  the main threat, with a few gusts as high as 80 mph possible.
  Isolated large hail to 1 to 2 inches in diameter is also
  possible across southwest Lower Michigan and northwest Indiana
  this afternoon. Isolated tornadoes are also possible.

- Dry and seasonable Tuesday through Thursday.

- High Swim Risk Tuesday for southeast Lake Michigan beaches.

&&

.DISCUSSION...
Issued at 255 PM EDT Mon Jul 27 2026

The main forecast concern will be on the severe weather potential
through this evening.

A complicated convective scenario is unfolding across the Great
Lakes region this afternoon. Preferred region of convective
development has been across northeast Illinois along a corridor
of low level warm/moist advection. This forcing is coincident
with strengthening upper low level flow and effective shear
profiles. Extreme instability with MLCAPES 4-5k J/kg CAPES is
situated across northeast Indiana with sharp eastward
diminishment in instability across northeast Indiana/northwest
Ohio. Cells across northeast Illinois are favoring strong cold
pools with signatures of very strong base velocity shifting
southeast across far northwest Indiana. The combination of
shallow low level southwest flow and deeper northwesterly flow
in the mid/upper levels is favor some north to south preference
in propagation vectors with the storms across northeast
Illinois. Areas west of US Route 31 across northeast Indiana
should stand greatest risk of seeing higher end thunderstorm
wind gusts (80+ mph) as the storms across NE Illinois drop
southeast. In addition to the risk of higher end damaging wind
gusts, the extreme instability will support some isolated large
hail of 1 to 2 inches in diameter. Also, the aforementioned
background shear profiles will continue to support some embedded
supercell structures with a risk of isolated tornadoes. 0-3km
shear vectors oriented from the northwest at around 30 knots
could also support a few QLCS tornado spinups where any rear
inflow jet can orient in a NW to SE fashion and where more
mature cold pools develop.

Additional storms are expected to develop across the Great Lakes
region this evening as low level front pushes southward with an
additional risk of scattered damaging wind gusts through around 02Z.
Confidence in severe gusts after 00Z does diminish somewhat however.

By Tuesday morning, the nose of the upper level jet streak will
reach the Mid Atlantic states with lagging sfc trough/cool front
expected to extend from western PA to southern Illinois. Passage of
this front will lead quieter weather conditions through the middle
of the week with temperatures/dew points closer to seasonable levels.

The next system to watch will be toward end of the work as the
potential exists for synoptic wave to become convectively enhanced
across the Dakotas. Some question exists as to instability
magnitudes as far east as southern Great Lakes/Ohio Valley with this
system with some indications of this system becoming more vertically
stacked in nature well to the west.

&&

.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...
Issued at 1245 PM EDT Mon Jul 27 2026

Cluster of thunderstorms from MKE south through ORD are the
primary item of focus for this TAF period. Rather high
confidence in storms persisting through KSBN, and perhaps a
tinge of uncertainty toward KFWA. For now, the environment is
highly supportive of sustained convection.

Behind these thunderstorms, northerly flow eventually brings an
area of stratus down behind a thermal trough descending through
Michigan prior to sunrise. As always, it is uncertain how long
stratus will persist into Tuesday.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Heat Advisory until 6 PM EDT /5 PM CDT/ this evening for
     INZ012-013-020-103-203.
     Beach Hazards Statement from late tonight through Wednesday
     morning for INZ103.
OH...None.
MI...Beach Hazards Statement from late tonight through Wednesday
     morning for MIZ177-277.
MARINE...Small Craft Advisory from 2 AM Tuesday to 2 AM EDT Wednesday
     for LMZ043-046.

&&

DISCUSSION...Marsili
AVIATION...Brown

In the hours before

Local storm report, Jul 27, 4:16 PM EDT, 32 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
416 PM EDT Mon Jul 27 2026

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

0331 PM     Tstm Wnd Dmg     2 NW Twin Lakes         41.33N 86.39W
07/27/2026                   Marshall           IN   Public

            Time estimated by radar.

&&

CR

Local storm report, Jul 27, 4:20 PM EDT, 28 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
420 PM EDT Mon Jul 27 2026

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

0330 PM     Tstm Wnd Dmg     2 ENE Oak Grove         41.30N 86.45W
07/27/2026                   Marshall           IN   Emergency Mngr

            Tree down across roadway.

&&

CR

Local storm report, Jul 27, 4:22 PM EDT, 26 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
422 PM EDT Mon Jul 27 2026

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

0335 PM     Tstm Wnd Dmg     Argos                   41.23N 86.25W
07/27/2026                   Marshall           IN   Emergency Mngr

            Siding ripped off of house. Time estimated
            by radar.

&&

CR

Local storm report, Jul 27, 4:24 PM EDT, 24 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
424 PM EDT Mon Jul 27 2026

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

0414 PM     Tstm Wnd Gst     2 S Grissom Afb         40.63N 86.15W
07/27/2026  M60 MPH          Miami              IN   AWOS

            AWOS station KGUS Grissom AFB Peru.

&&

CR

Local storm report, Jul 27, 4:29 PM EDT, 19 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
429 PM EDT Mon Jul 27 2026

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

0324 PM     Tstm Wnd Dmg     1 S Donaldson           41.35N 86.44W
07/27/2026                   Marshall           IN   Broadcast Media

            Media report of a large diameter tree
            knocked over by thunderstorm winds just
            south of Donaldson in Marshall County
            Indiana. Time radar estimated.

&&

JA

Local storm report, Jul 27, 4:31 PM EDT, 17 minutes before

Preliminary Local Storm Report
National Weather Service Northern Indiana
431 PM EDT Mon Jul 27 2026

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

0418 PM     Tstm Wnd Dmg     1 SSE Galveston         40.56N 86.18W
07/27/2026                   Cass               IN   Emergency Mngr

            Powerlines down.

&&

CR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 3:46 AM EDT	Beach Hazards Statement	IWX	LaPorte	50 hr
Jul 27, 3:48 AM EDT	Small Craft Advisory	IWX		50 hr
Jul 27, 6:50 AM EDT	Dense Fog Advisory	IWX	Fulton, LaPorte, Marshall, Pulaski, Starke, White	2 hr
Jul 27, 10:52 AM EDT	Heat Advisory	IWX	LaPorte, Pulaski, Starke, White	6 hr
Jul 27, 1:16 PM EDT	Special Marine Warning	IWX		119 min
Jul 27, 2:34 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Saint Joseph	26 min
Jul 27, 2:37 PM EDT	Severe Thunderstorm Warning Destructive damage threat	IWX	LaPorte, Pulaski, Starke	23 min
Jul 27, 2:56 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Marshall, Saint Joseph	49 min
Jul 27, 2:59 PM EDT	Severe Thunderstorm Warning Considerable damage threat	IWX	Cass, Fulton, LaPorte, Marshall, Pulaski, Starke and 1 more	46 min
Jul 27, 3:16 PM EDT	Tornado Warning	IWX	LaPorte, Marshall, Saint Joseph, Starke	44 min
Jul 27, 3:43 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, Marshall, Saint Joseph	32 min
Jul 27, 3:55 PM EDT	Special Marine Warning	IWX		95 min
Jul 27, 4:23 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Grant, Huntington, Miami, Wabash	52 min
Jul 27, 4:24 PM EDT	Areal Flood Advisory	IWX	LaPorte, Marshall, Saint Joseph	3 hr
Jul 27, 4:36 PM EDT	Tornado Warning	IWX	Blackford, Grant	39 min
Jul 27, 5:26 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte	49 min
Jul 27, 6:06 PM EDT	Severe Thunderstorm Warning	IWX	LaPorte, Pulaski, Starke	39 min
Jul 27, 8:08 AM EDT	Special Weather Statement	IWX	Cass	52 min
Jul 27, 8:47 AM EDT	Severe Thunderstorm Warning	IWX	Cass, Saint Joseph	32 min
Jul 27, 2:25 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	50 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2026 Every severe thunderstorm 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.