(AP) -- June 1 is the start of hurricane season -- and forecasters admit they're still trying to figure out how storms strengthen and weaken.
The director of the National Hurricane Center in Florida says experts need to work "a lot harder" to predict intensity.
Max Mayfield says his center is asking researchers for help on that front.
Mayfield also says Americans should avoid becoming complacent. He says just because the U-S is fighting a war in Afghanistan -- and looking to protect the homeland from terrorism -- does not mean hurricanes will stop coming.
Experts are predicting eleven named storms this year -- and two major hurricanes.
Hurricane season runs through November 30th.