Greatest Seasonal Snowfall Total: 1,140 Inches. The western United States is king when it comes to the most amazing snow totals ever recorded over the course of a season, month and a day. A plethora of mountainous terrain in this part of the country interacting with moist Pacific storm systems can lead to some enormous amounts of snow.
The abbreviation et al. means and others. It is most often used when a work you are citing in your paper has multiple authors. When a work has two authors, cite both names every time the reference occurs in the text.
One quibble about the proper use of et al. I'm pretty sure you do not want to use et al. in a bibliography or reference list. Those are the places where you want to spell everything out in detail. Instead, you use it in a footnote or in-text citation within the main text.