EF0 tornado, Mayville, Wisconsin, June 12, 2008

1. EF065 to 85 mphthis tornado

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

2. EF186 to 110 mph

   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

EF0

Date

June 12, 2008

Touchdown

6:25 PM CDT (23:25 UTC)

Lifted

6:26 PM CDT (23:26 UTC)

On the ground

1 minutes

Path length

0.1 miles (0.1 km)

Path width

20 yards (18 m)

Deaths

0

Injuries

0

County

Dodge County

Touchdown point

43.469, -88.526

Lift-off point

43.470, -88.525

Record number

0806121725-01

A series of clusters of strong to severe storms ahead of a cold front moved east/northeast across south-central and sourtheast Wisconsin. Copious amounts of moisture were available that allowed repeated heavy rains. Additionally, there was sufficient vertical wind shear to allow for the generation of supercell thunderstorms with rotating updrafts that led to seven tornadoes in this part of the state of Wisconsin. The flooding rains constituted the 2nd round/punch of heavy rains that led to more widespread and severe flash flooding and record-setting river flooding (1st punch was Jun 7-9, 2008).||The axis of heavy rains on June 12th extended from Lafayette County northeast through Dane County to eastern Green Lake County and western Fond du Lac County. Generally 4 to 6 inches fell in this area, with 1 to 4 inches elsewhere. The generous rains in June at Milwuakee led to a montly total of 12.27 inches. This easily broke the record for highest June rainfall total. The previous record was 10.13 inches, set in 1917, and also makes June, 2008, the wettest month ever at Milwaukee.||The Rock River crested at all-time record high levels at the following gauage sites: Waupun (10.07' on 6/13), Horicon (10.29' on 6/17), Watertown (7.81' on 6/13), Jefferson (15.64' on 6/18), Ft. Atkinson (10.85' on 6/21), Newville (15.12' on 6/21), Indianford (18.33' on 6/21), and Afton (13.51' on 6/21). Likewise, the Crawfish River set a new all-time high crest of 13.59' on 6/16 at Milford, and Beaver Dam Creek set a new record of 843.53' on 6/16 at Beaver Dam. Other, new, all-time record high crests include 4.47' on 6/9 on the Bark River at Rome, 4.95' on 6/13 on the Mukwonago River at Mukwonago, 11.41' on 6/8 on Oak Creek in South Milwaukee, 13.93' on 6/13 on the Milwaukee River near Cedarburg, 13.54' on 6/15 on the Fox River at Burlington, and 15.18' on 6/15 on the Fox River at New Munster.||High water levels generaged major road blocks, for various periods, on Interstate 94 in Jefferson and Waukesha Counties, on Interstate 894 in Milwaukee, and on Interstate 39/90/94 in Columbia County near Portage. Most inland lakes rose to high levels that resulted in minor shoreline damage to piers, etc.

This weak tornado lasted less than a minute and resulted in only broken tree limbs. It spun up southwest of the intersection of Polk Road and Madison Rd. The starting and ending locations, with respect to lat/long pairs of numbers, were 43.46927/-88.52612 and 43.47016/-88.52494. DI#28 (TS), DOD2. Wind speed estimated at about 75 mph. Average path width about was about 10 yards.

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. One was issued for the county at another hour that day.

The county was under a tornado watch, issued at 18:06 UTC and running to 00:48 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 20:04 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.

Juneau (UNU), 15 km from the path, in the two hours either side.

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

The Milwaukee radar (KMKX), 56 km away, was scanning. The volume nearest the touchdown began at 23:24 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 2008 tornado in WisconsinEvery tornado in Wisconsin since 1950Warnings in force in Wisconsin nowThe forecast where you are

26 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.