We now have the fourth hurricane of the 2012 Atlantic season as Isaac has strengthened prior to making landfall tonight. The National Hurricane Center says that Hurricane Isaac is packing Category 1 strength winds of 75mph.  Landfall is expected tonight on the eve of the 7th anniversary of Hurricane Katrina.  Read the rest of this story on Examiner.com including the storm’s forecast track, satellite imagery and more.

Check out this impressive two-day time lapse video showing two days of Isaac’s evolution and track from tropical storm to hurricane.