
This market will resolve YES if there are 5 or more confirmed EF4 or EF5 tornadoes in the United States during the calendar year 2025. Resolution will be based on official National Weather Service storm surveys and the NOAA Storm Events Database.
Resolution Sources:
NOAA Storm Events Database: https://www.ncdc.noaa.gov/stormevents/
National Weather Service Storm Surveys
Wikipedia's 2025 Tornado Season page: https://en.wikipedia.org/wiki/Tornadoes_of_2025
Update 2025-05-18 (PST) (AI summary of creator comment): The creator has provided an update on specific tornadoes relevant to the market's resolution:
A tornado near Marion, Illinois has been confirmed as EF4.
If the tornado that went through London, Kentucky (currently rated EF3+) is upgraded to an EF4 or EF5, this would bring the total of such tornadoes to 5, and the market will resolve YES.
Just saying, there was a tornado just went through London Kentucky, and there was probably EF4+ damage from that.