Ozaukee County Natural Disasters and Weather Extremes
The chance of earthquake damage in Ozaukee County is about the same as Wisconsin average and is much lower than the national average. The risk of tornado damage in Ozaukee County is about the same as Wisconsin average and is higher than the national average.
Earthquake Index, #13
| Ozaukee County | 0.00 |
| Wisconsin | 0.00 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #1
| Ozaukee County | 0.0000 |
| Wisconsin | 0.0000 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #28
| Ozaukee County | 157.31 |
| Wisconsin | 153.98 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 8,906 other weather extremes events within 50 miles of Ozaukee County were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 34 | Cold: | 86 | Dense Fog: | 167 | Drought: | 84 |
| Dust Storm: | 0 | Flood: | 493 | Hail: | 2,253 | Heat: | 84 | Heavy Snow: | 280 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 49 | Landslide: | 0 | Strong Wind: | 172 |
| Thunderstorm Winds: | 4,013 | Tropical Storm: | 0 | Wildfire: | 5 | Winter Storm: | 283 | Winter Weather: | 80 |
| Other: | 823 | ||||||||
Volcanos Nearby
No volcano is found in or near Ozaukee County.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Ozaukee County.
No historical earthquake events found in or near Ozaukee County.
Historical Tornado Events
A total of 22 historical tornado events that had recorded magnitude of 2 or above found in or near Ozaukee County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 21.1 | 1964-08-22 | 4 | 43°23'N / 87°55'W | 2.20 Miles | 50 Yards | 0 | 30 | 2.5M | 0 | Ozaukee | |
| 29.4 | 1980-08-04 | 2 | 43°10'N / 88°01'W | 0.10 Mile | 20 Yards | 0 | 0 | 250K | 0 | Milwaukee | |
| 30.4 | 1958-08-07 | 2 | 43°07'N / 88°00'W | 1.00 Mile | 100 Yards | 0 | 4 | 25K | 0 | Milwaukee | |
| 31.8 | 1964-09-03 | 2 | 43°07'N / 88°02'W | 0.10 Mile | 100 Yards | 0 | 0 | 250K | 0 | Milwaukee | |
| 33.5 | 1977-04-02 | 2 | 43°04'N / 88°03'W | 43°04'N / 88°00'W | 1.30 Miles | 33 Yards | 0 | 0 | 25K | 0 | Milwaukee |
| 34.4 | 1962-07-22 | 2 | 43°00'N / 87°58'W | 0.10 Mile | 33 Yards | 0 | 0 | 25K | 0 | Milwaukee | |
| 34.6 | 1975-08-25 | 2 | 42°59'N / 87°57'W | 0.20 Mile | 20 Yards | 0 | 0 | 25K | 0 | Milwaukee | |
| 35.6 | 1981-04-04 | 4 | 43°26'N / 88°12'W | 1.80 Miles | 100 Yards | 3 | 53 | 25.0M | 0 | Washington | |
| 36.2 | 1974-04-21 | 3 | 43°39'N / 88°10'W | 43°54'N / 87°43'W | 28.10 Miles | 200 Yards | 1 | 7 | 2.5M | 0 | Sheboygan |
| 36.9 | 1959-09-26 | 2 | 42°57'N / 87°58'W | 1.50 Miles | 33 Yards | 0 | 3 | 250K | 0 | Milwaukee | |
| 37.9 | 1977-04-02 | 2 | 43°04'N / 88°13'W | 43°04'N / 88°03'W | 8.00 Miles | 100 Yards | 0 | 2 | 2.5M | 0 | Waukesha |
| 40.3 | 1968-07-21 | 2 | 43°22'N / 88°18'W | 2.00 Miles | 100 Yards | 0 | 0 | 25K | 0 | Washington | |
| 41.1 | 1977-06-05 | 3 | 43°12'N / 88°18'W | 42°55'N / 88°06'W | 21.80 Miles | 300 Yards | 0 | 0 | 2.5M | 0 | Waukesha |
| 41.2 | 1961-09-22 | 2 | 43°39'N / 88°15'W | 43°47'N / 88°04'W | 12.60 Miles | 300 Yards | 0 | 0 | 25K | 0 | Fond Du Lac |
| 43.3 | 1980-04-07 | 2 | 43°27'N / 88°25'W | 43°27'N / 88°17'W | 6.10 Miles | 33 Yards | 0 | 2 | 250K | 0 | Washington |
| 43.4 | 1974-04-21 | 3 | 43°36'N / 88°24'W | 43°39'N / 88°10'W | 11.90 Miles | 200 Yards | 1 | 5 | 2.5M | 0 | Fond Du Lac |
| 44.2 | 1977-06-05 | 3 | 43°20'N / 88°26'W | 43°12'N / 88°18'W | 11.10 Miles | 300 Yards | 0 | 0 | 250K | 0 | Washington |
| 44.9 | 1969-06-29 | 2 | 42°50'N / 88°12'W | 42°54'N / 87°57'W | 13.10 Miles | 100 Yards | 0 | 0 | 250K | 0 | Waukesha |
| 44.9 | 1986-06-11 | 2 | 43°36'N / 88°21'W | 43°42'N / 88°15'W | 8.00 Miles | 100 Yards | 0 | 0 | 250K | 0 | Fond Du Lac |
| 45.6 | 1984-04-27 | 4 | 42°59'N / 88°22'W | 43°05'N / 88°12'W | 6.50 Miles | 10 Yards | 1 | 14 | 2.5M | 0 | Waukesha |
| 48.3 | 1981-04-04 | 2 | 43°55'N / 88°05'W | 0.10 Mile | 23 Yards | 0 | 6 | 250K | 0 | Calumet | |
| 49.0 | 2010-07-22 | 2 | 42°51'N / 88°12'W | 42°52'N / 88°10'W | 1.00 Mile | 100 Yards | 0 | 0 | 0K | 0K | Waukesha |
| Brief Description: EVENT NARRATIVE: An EF2 tornado developed about 1 mile south of Big Bend, 1/8 mile west of of STH 164 between Henneberry Ave. and Kelsey Ave. The tornado partially uprooted trees, broke tree branches, caused corn crop damage and damaged a barn along a 1 mile path that averaged 70 yards in width. The tornado ended about 1.7 miles southeast of Big Bend, 1/3 mile east-northeast of the intersection of Crowbar Dr. and Parker Dr. The EF2 estimated wind speeds of 115 to 120 mph were based on DI 27(TH) DOD4. The exact start location is Lat 42.86466 and Lon -88.20040. The exact end location is Lat 42.86569 and Lon -88.18079. EPISODE NARRATIVE: A stalled frontal boundary combined with a moist and unstable atmosphere and strong wind shear to produce numerous tornadoes and funnel clouds over South Central and Southeast Wisconsin. A series of vorticity maxima moving west to east through the western Great Lakes enhanced isentropic lift, as a strengthening southerly low-level jet interacted with a nearly stationary west to east warm front. | |||||||||||
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.