EF1 tornado, Moonlight Bay to Angola, Indiana, June 9, 2018

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF1

Date

June 9, 2018

Touchdown

6:34 PM EDT (22:34 UTC)

Lifted

6:40 PM EDT (22:40 UTC)

On the ground

6 minutes

Path length

0.9 miles (1.4 km)

Path width

375 yards (343 m)

Deaths

0

Injuries

0

County

Steuben County

Touchdown point

41.614, -85.016

Lift-off point

41.618, -85.000

Record number

1806091634-01

4 damage points were recorded along this path by NWS IWX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 75 mph.

• Starting point. Ground scour noted in field hillside. Eye witness account of a multi-vortex (3) tornado touchdown here.
• section of roof removed from this building.
• Originating point of tornado here.
• Approximate ending point of this tornado.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

Slow moving, compact MCV moved off of Lake Michigan during the afternoon hours of the 9th. A residual stationary boundary stretched roughly from Michigan City southeastward to Van Wert in the morning of the 9th. As the MCV moved further off Lake Michigan, the boundary lifted northward as a warm front, which eventually became orientated northwest to southeast across southern Steuben/northern DeKalb counties. Thunderstorms developed with isolated tornadoes occurring in Steuben county.

According to witnesses, a weak, but multi funnel tornado touched down in an empty field, then intensified somewhat as it tracked East Northeast, removing a portion of a roof. It also caused damage to two barn structures as it crossed County Road 150 W. Maximum winds are estimated at around 80 mph.

An EF-1 tornado caused widespread, extensive tree damage, knocking down trees along adjacent railroad tracks. Minor roof damage was noted to a few structures. Maximum wind speeds are estimated around 105 mph.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Marginal Risk. The outlook in force was issued at 19:59 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Angola (ANQ), 7 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Northern Indiana radar (KIWX), 64 km away, was scanning. The volume nearest the touchdown began at 22:35 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2018 tornado in IndianaEvery tornado in Indiana since 1950Warnings in force in Indiana nowThe forecast where you are

5 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.