Print as many copies of the NDIC sets as needed for your purposes. It is suggested that you print the cards for each event type on a different color paper (e.g., gray or white for blizzards, blue for hail, green for floods, yellow for lightning, pink for tornadoes, etc). Then insert the cards into a notebook with dividers to separate the event types. Make sure the notebooks are clearly labeled so they can be located quickly when needed.