Simplify the following text for a Grade 12 native English-speaking person.
Original: Alberto traveled generally northeast on an erratic course , and briefly intensified to a Category 1 hurricane , one of the earliest hurricanes of June , and the earliest date for a hurricane in the Atlantic Ocean since Hurricane Alma in May 1970 .
Simplified: Alberto traveled usually northeast on an unpredictable course and for a hort time , strengthened to a Category 1 hurricane , one of the earliest hurricanes of June .