dates of hail storms in 2007?

Answer 1

In the United States, you can go to the website http://www.spc.noaa.gov/climo/ and enter a particular date and see all the reports of hail for that date that's 0.75" in diameter or larger (about dime-sized). This data also gets compiled into a database at http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~storms that you can give a range of dates to. The database is not current, though, it runs about 5 months behind.

Answer 2

I would think that there is a hail storm somewhere in the world, every day. So the dates are January 1st, January 2nd, January 3rd, January 4th, January 5th, .... and so on.