The 1917 case is perhaps the most relentless of all the outbreak sequence events that that will be covered in this series.
Despite minimal attention in the lead up, May 9 ended up producing about two dozen tornadoes, including the first violent one of the year.
Although tornadoes in 2015 came mostly in peak season, there were plenty of visually impressive tornadoes across the calendar year.
This storm was an oddball. While it hit a place that sees tornadoes with regularity, the timing was kind of bizarre.
An over-performing day dropped numerous tornadoes across Texas and Oklahoma. A reminder that tornado outbreaks just happen sometimes.
While much of the week was fairly tame, it was book ended by larger events. Looks like more tornadoes are ahead.
Now matter how you slice it, the first full week of May 2015 was a big one for tornadoes.
This outbreak had some issues, but it still ended up performing quite strongly. Several dozen tornadoes dropped across the southern and central Plains on May 9 with more further to the east on May 10.
Last week was full of storms, and quite a few tornadoes as well. Twisters are set to take a break as we close the month and start May.
Last week was pretty active, for 2015. This week looks like it will be even more active, and potentially a lot more.
The tornado drought of March 2015 came to an end with a fatal tornado in northeast Oklahoma and another hit to Moore.
The chunk of May from the 11th through the end of the month was pretty tame overall, but plenty of tornadoes occurred. June starts on a stormy note.