An isolated severe thunderstorm brought down trees and powerlines in Allen County, Ohio.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS IWX wrote it up.
An isolated severe thunderstorm brought down trees and powerlines in Allen County, Ohio.
The local office's own words before the first event, 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 the first event at Jun 17, 6:40 PM EST, 2 hours 35 minutes earlier. Its key messages:
Area Forecast Discussion
National Weather Service Northern Indiana
740 PM EDT Wed Jun 17 2026
.KEY MESSAGES...
- Heavy rain and an isolated severe thunderstorm are possible
this evening.
- A tornado watch was issued some counties south of US 24 where
there is the greatest chance for severe thunderstorms.
- Quiet weather is expected Thursday through Saturday.
&&
.UPDATE...
Issued at 655 PM EDT Wed Jun 17 2026
The overall severe weather risk appears to be gradually
diminishing over northern Indiana, yet we remain vigilant over
the Tornado Watch area.
An upper- level trough and cold front remain to our west, while
our near term environment remains limited due to steady rain
and capping. Despite this, a small area of embeded
thunderstorms persists along the Indiana Toll Road, perhaps on
the cusp on a lingering MCV from morning activity. Convection
there has been shallow with a strong wind field aloft. Yet, to
this point, heavy rain has been the observed impact. Behind this
area of rain, the in- house Warn on Forecast suggest the best
instability will quickly fade south, limiting any renewed
convection risk after this current period of heavy rain and
thunder.
Farther south, toward White County, showers have continued to
percolate in the vicinity of a 60-jet 850mb jet. With strong
low-level flow, we remain alert for an severe thunderstorm
development within the Tornado Watch area, as guidance
continues to offer glimpses that renewed convection there is
possible. Time is running out, and thus if any severe storms
occur, they ought to develop prior to sunset.
Lastly, a wind advisory was hoisted for what appeared to be a
developing wake low over Chicago's area earlier in the
afternoon. (Gusty winds were observed and instances of damager
and power outages were noted). This has failed to materialize
any further and will likely result in the wind advisory being
canceled earlier than advertised.
&&
.DISCUSSION...
Issued at 120 PM EDT Wed Jun 17 2026
An MCS moving in from Illinois is currently moving into the
region and acting to hold the warm front and better instability
south of the area. However, as this weakens this afternoon, a
strong surge of warm/moist air advection will push northward.
Thunderstorms over central Illinois will then stream in from the
southwest around 20Z. This will be the beginning of what we have
previously been referring to as "round 2" of storms with a
significant severe potential, especially damaging winds and
tornadoes. The greatest threat for severe weather will
generally be south of US-30 as a strong cold front comes in
22-23Z. This will be accompanied by extreme wind shear and
effective SRH on the order of 900 m2/s2. It will be important to
remain vigilant given the potential for strong tornadoes. Also,
while the highest tornado probabilities remain south of US-30
and west of I-69 where better instability resides, with the warm
front approaching the Michigan border where the better helicity
exists, the tornado threat could be just as high or higher if
any minor instability develops there. In addition to the tornado
threat, will also have to watch potential for wake low
development which could bring damaging winds behind the line of
storms into the late evening. Regardless of wake low
development, it will be breezy into the overnight and on
Thursday. Hail threat is a bit lower today given poor lapse
rates but any organized supercell will still be capable of
generating some large hail.
Also of concern is the possibility of heavy rain/flooding given the
potential for multiple rounds of convection training east-west
across the area today. PW values reach or exceed 2 inches with a
very moist profile throughout the column. Warm cloud layers and MBE
velocities are on the marginal side for a significant flooding
threat and storm motions will be fast. However, still see potential
for a quick 2-3 inches in some locations (particularly in our NW)
and this will be capable of at least isolated pockets of flooding
and impacts. Have therefore maintained a flood watch for areas
along and north of US-24. (Flood risk appears a bit lower south
of 24).
Outside of some gusty winds tomorrow, no weather concerns for
Thursday-Saturday. Another system appears possible on Sunday but
focus remained on today's hazards.
&&
.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 732 PM EDT Wed Jun 17 2026
MVFR conditions this evening with scattered rain showers and
low ceilings. Rain showers will end this evening, but the low
clouds should linger overnight and into Thursday morning. There
is a small chance for thunder as well, but for now did not
include a mention in the TAFs. Winds will start out southerly,
but become southwest overnight and eventually northwest on
Thursday. This northwest wind will bring in drier air and VFR
conditions Thursday afternoon.
&&
.IWX WATCHES/WARNINGS/ADVISORIES...
IN...Flood Watch until 2 AM EDT /1 AM CDT/ Thursday for INZ005>009-
012>015-017-018-020-022>025-103-104-116-203-204-216.
Beach Hazards Statement from 1 AM CDT Thursday through
Thursday evening for INZ103.
OH...Flood Watch until 2 AM EDT Thursday for OHZ001-002-004-005-015.
MI...Flood Watch until 2 AM EDT Thursday for MIZ078>081-177-277.
Beach Hazards Statement from 2 AM EDT Thursday through
Thursday evening for MIZ177-277.
MARINE...Gale Warning until 8 PM EDT this evening for LMZ043-046.
Small Craft Advisory until 4 PM EDT Thursday for LMZ043-046.
&&
UPDATE...Brown
DISCUSSION...Cobb
AVIATION...NWSPreliminary Local Storm Report
National Weather Service Northern Indiana
813 PM EDT Wed Jun 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM Flood 2 W Grissom Afb 40.66N 86.19W
06/17/2026 Cass IN Emergency Mngr
Water accumulating in fields, flowing over
the road at 700 S and 1000 E.
&&
MCDThe Northern Indiana radar (KIWX), 134 km away, was scanning. The volume nearest the first event began at 02:12 UTC.
2 thunderstorm wind. Local standard time, as filed.
A member of the media reports that a large tree was snapped.
Multiple trees downed. Some fell onto power lines and reportedly smashed three cars. Near the intersection of Columbus Grove rd and Tom Fett rd. Tree in photo sent appears healthy.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2026Every state in 2026This day in weather historyWarnings in Ohio, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1337204, 1337205.