Greycliff Elementary School District Natural Disasters and Weather Extremes
The chance of earthquake damage in Greycliff Elementary School District is lower than Montana average and is lower than the national average. The risk of tornado damage in Greycliff Elementary School District is about the same as Montana average and is much lower than the national average.
Earthquake Index, #117
| Greycliff Elementary School District | 0.65 |
| Montana | 1.98 |
| 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, #40
| Greycliff Elementary School District | 0.0011 |
| Montana | 0.0002 |
| 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, #252
| Greycliff Elementary School District | 4.15 |
| Montana | 7.73 |
| 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 604 other weather extremes events within 50 miles of Greycliff Elementary School District 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: | 1 | Blizzard: | 1 | Cold: | 0 | Dense Fog: | 0 | Drought: | 2 |
| Dust Storm: | 0 | Flood: | 11 | Hail: | 337 | Heat: | 0 | Heavy Snow: | 25 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 5 |
| Thunderstorm Winds: | 148 | Tropical Storm: | 0 | Wildfire: | 9 | Winter Storm: | 29 | Winter Weather: | 0 |
| Other: | 36 | ||||||||
Volcanos Nearby
A total of 1 volcano is found in or near Greycliff Elementary School District.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 99.7 | Yellowstone | US-Wyoming, United States | 44.43 | -110.67 | 2805 | Caldera | Tephrochronology | Last known eruption B.C. (Holocene) |
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Greycliff Elementary School District.
No historical earthquake events found in or near Greycliff Elementary School District.
Historical Tornado Events
A total of 2 historical tornado events that had recorded magnitude of 2 or above found in or near Greycliff Elementary School District.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 43.8 | 2010-07-02 | 2 | 46°10'N / 110°26'W | 46°12'N / 110°24'W | 2.00 Miles | 150 Yards | 0 | 0 | 32.5M | 0K | Park |
| Brief Description: EVENT NARRATIVE: At approximately 345pm to about 352pm, a supercell thunderstorm produced a tornado with surrounding microburst damage occurred about 15 miles northeast of Wilsall over the foothills of the Crazy Mountains in Park County. Thousands of trees were damaged, including large trees that were uprooted or snapped off at the base. Trees as large as three to four feet in diameter were uprooted and/or snapped. EF-2 scale damage with estimated wind speeds up to 120 mph was determined with this tornado. EPISODE NARRATIVE: At approximately 345pm to about 352pm, a supercell thunderstorm producing a tornado with surrounding microburst damage along with large hail occurred about 15 miles northeast of Wilsall over the foothills of the Crazy Mountains in Park County. Thousands of trees were damaged, including large trees that were uprooted or snapped off at the base. Trees as large as three to four feet in diameter were uprooted and/or snapped. EF-2 scale damage with estimated wind speeds up to 120 mph was determined with this tornado. Large hail was also reported with this thunderstorm as it moved east of the Crazy Mountains. | |||||||||||
| 46.3 | 1964-07-20 | 2 | 46°24'N / 109°48'W | 2.00 Miles | 33 Yards | 0 | 0 | 0K | 0 | Fergus | |
* 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.