EF0 tornado, Jackson, Wisconsin, June 2, 2007

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 2, 2007

Touchdown

2:19 PM CDT (19:19 UTC)

Path length

0.0 miles (0.0 km)

Path width

15 yards (14 m)

Deaths

0

Injuries

0

County

Washington County

Touchdown point

43.292, -88.186

Lift-off point

43.292, -88.186

Record number

0706021319-01

Isolated severe weather affected Washington County on June 2nd as a line of thunderstorms moved north/northeast through southern Wisconsin. On this day, an upper-level,cut-off low pressure was drifting slowly east through Minnesota. Sufficient vertical wind shear was present in spiral bands of convection in order to generate rotating updrafts in some cells.

A brief, weak tornado spun up about 2.12 miles south-southwest (198 degrees) of the city of Jackson, or about 2.4 miles north of the village of Richfield (just west of STH 45), or about 0.23 miles southwest (225 degrees) of the STH 45 overpass with Western Ave. It was stationary during its 20-30 seconds life-span, based on trained spotter accounts. It resulted in only matted-down grasses. No EF-Scale Damage Indicator (DI) could be used. Specific lat/lon info is: N43.29313 W88.19027. Estimated average path width was about 20 yards. Estimated wind speed is 56-61 knots (65-70 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 16:41 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 Milwaukee radar (KMKX), 47 km away, was scanning. The volume nearest the touchdown began at 19:17 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.

The live radar over the trackEvery 2007 tornado in WisconsinEvery tornado in Wisconsin since 1950Warnings in force in Wisconsin nowThe forecast where you are

10 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.