EF1 tornado, Azalia to Scofield, Michigan, June 23, 2010

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 23, 2010

Touchdown

10:06 PM EDT (02:06 UTC)

Lifted

10:23 PM EDT (02:23 UTC)

On the ground

17 minutes

Path length

11.5 miles (18.5 km)

Path width

100 yards (91 m)

Deaths

0

Injuries

0

Property damage

$100,000

County

Monroe County

Touchdown point

42.047, -83.675

Lift-off point

42.019, -83.455

Record number

1006232006-01

A few tornadic producing severe thunderstorms tracked along and south of I-94 corridor during the early evening hours.

An NWS storm survey confirmed a tornado touched down just north of the Cone Rd exit off US 23...about 2 miles south of Milan at 10:06 PM June 23. The tornado lifted about 2 1/2 miles northeast of Maybee, near Steffas Rd between Scofield and Zink. The total path length was 11 1/2 miles with an average path width of 50 yards. The tornado was rated an EF0 along most of its path, producing winds of 60 to 70 MPH. However, EF1 damage with winds estimated at 90 MPH was found near Tuttle Hill Rd in London Township where a roof was torn off of a pole barn and substantial tree damage was found. The width of this tornado had briefly extended to 100 yards in this location. Several homes also had roof and shingle damage - mainly in and near the town of Scofield.

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

20 minutes of warning. NWS DTX issued a tornado warning for this county at 01:46 UTC, 20 minutes before the tornado touched down, in force until 02:45 UTC.

The county was under a tornado watch, issued at 00:13 UTC and running to 03:41 UTC.

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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:00 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.

The Detroit radar (KDTX), 75 km away, was scanning. The volume nearest the touchdown began at 02:06 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 2010 tornado in MichiganEvery tornado in Michigan since 1950Warnings in force in Michigan nowThe forecast where you are

11 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.