Alert archive / Indiana / Special Weather Statements in 2025

Special Weather Statement, NWS Northern Indiana

July 20, 2025Grant County, Indiana

NWS Northern Indiana issued this special weather statement at Jul 20, 2025, 10:23 AM EDT for Grant County, Indiana. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2025, 10:23 AM EDT (14:23 UTC)
Expired: Jul 20, 2025, 11:15 AM EDT
In force: 52 min
Issued by: NWS Northern Indiana
Hail: 0.00 in
Wind: 40

County Grant County, IN

The radar

The Northern Indiana radar (KIWX), 99 km from the middle of the area, began a volume at 14:25 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 2.4 hours before the alert went out and 198 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: 151 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 20, 7:57 AM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Jul 20, 7:57 AM EDT, 2 hours 26 minutes before

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Hazardous weather outlook, Jul 20, 4:26 AM EDT, 5 hours 57 minutes before

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In the hours before

Special weather statement, Jul 20, 9:34 AM EDT, 49 minutes before

Special Weather Statement
National Weather Service Northern Indiana
934 AM EDT Sun Jul 20 2025

INZ020-201415-
White IN-
934 AM EDT Sun Jul 20 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN WHITE COUNTY
THROUGH 1015 AM EDT...

At 933 AM EDT, Doppler radar was tracking a strong thunderstorm over
Oxford, or near Otterbein, moving southeast at 40 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Brookston and Badger Grove.

This includes Interstate 65 between mile markers 185 and 192.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4061 8677 4057 8677 4056 8693 4056 8709
      4057 8710 4067 8710
TIME...MOT...LOC 1333Z 301DEG 33KT 4053 8722

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

MCD

Special weather statement, Jul 20, 10:23 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Northern Indiana
1023 AM EDT Sun Jul 20 2025

INZ032-201515-
Grant IN-
1023 AM EDT Sun Jul 20 2025

...A STRONG THUNDERSTORM WILL IMPACT SOUTHERN GRANT COUNTY THROUGH
1115 AM EDT...

At 1022 AM EDT, Doppler radar was tracking a strong thunderstorm over
Swayzee, or 9 miles southwest of Marion, moving east at 30 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Marion, Gas City, Upland, Fairmount, Jonesboro, Sweetser, Swayzee,
Matthews, Sims, Fowlerton, Home Corner, Michaelsville, Normal, Mier,
Herbst, Hackleman, Point Isabel, Radley, and Roseburg.

This includes Interstate 69 in Indiana between mile markers 252 and
261.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4054 8586 4059 8583 4049 8545 4039 8544
      4038 8545 4038 8586
TIME...MOT...LOC 1422Z 291DEG 26KT 4048 8582

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

MCD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 9:34 AM EDT	Special Weather Statement	IWX	White	41 min
Jul 20, 10:48 AM EDT	Special Weather Statement	IWX	Blackford	27 min
Jul 20, 11:09 AM EDT	Special Weather Statement	IWX	Jay	51 min

Nearby

Special Weather Statements in Indiana, 2025 Every special weather statement in 2025

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.