Alert archive / Indiana / Mesoscale Discussions in 2025

Mesoscale Discussion 1349

June 18, 202527 counties in Indiana; 11 counties in Michigan; 20 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2025, 3:38 PM EDT for 27 counties in Indiana; 11 counties in Michigan; 20 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 18, 2025, 3:38 PM EDT (19:38 UTC)
Expired
Jun 18, 2025, 5:45 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 434
All 58 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Branch County, MI, Calhoun County, MI, Cass County, MI, Hillsdale County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Auglaize County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Lucas County, OH, Mercer County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 59 km from the middle of the area, began a volume at 19:39 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 7.6 hours before the alert went out and 195 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2025-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 765 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2025-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
765 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 11:57 AM EDTMesoscale DiscussionSPCBenton, Boone, Carroll, Cass, Clay, Clinton and 24 more2 hr
Jun 18, 1:01 PM EDTTornado WatchSPCAdams, Allen, Bartholomew, Benton, Blackford, Boone and 62 more7 hr
Jun 18, 1:44 PM EDTMesoscale DiscussionSPCBenton, Boone, Carroll, Cass, Clay, Clinton and 27 more2 hr
Jun 18, 2:44 PM EDTMesoscale DiscussionSPCCrawford, Dubois, Harrison, Perry, Pike, Posey and 3 more91 min
Jun 18, 3:07 PM EDTTornado WatchSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more6 hr
Jun 18, 4:08 PM EDTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clark, Crawford, Daviess and 40 more97 min
Jun 18, 4:51 PM EDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more6 hr
Jun 18, 6:24 PM EDTMesoscale DiscussionSPCDearborn, Ohio, Switzerland, Union96 min
Jun 18, 4:09 PM EDTSevere Thunderstorm WatchSPCAllegan, Barry, Calhoun, Clinton, Eaton, Genesee and 15 more6 hr
Jun 18, 6:03 PM EDTMesoscale DiscussionSPCCarroll, Columbiana, Cuyahoga, Geauga, Jefferson, Mahoning and 4 more87 min
Jun 18, 7:48 PM EDTMesoscale DiscussionSPCAshtabula, Athens, Belmont, Carroll, Columbiana, Coshocton and 24 more57 min

Nearby

Mesoscale Discussions in Indiana, 2025Mesoscale Discussions in Ohio, 2025Mesoscale Discussions in Michigan, 2025Every mesoscale discussion 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.