Don't underestimate "a storm". A hurricane releases about 1.3 x 10^17 joules/day [1] of raw kinetic energy (wind), and that's not including rain and flooding. That's equivalent to 31 megatons per day. The most powerful US nuclear weapons today are about 25 megatons.

[1] - http://www.aoml.noaa.gov/hrd/tcfaq/D7.html