A sample storm arrangement: note the spring lines, which were the longest lines, are now the shortest. Stern lines are extended one or two slips away. Additional bow lines lead across to the next dock or to storm anchors placed out from the slip.
Anchor your boat in a protected harbor where the bottom can allow a good anchor hold. An advantage to anchoring is that the boat can more easily respond to wind and water changes without striking docks or other boats than when moored. Heavy and extra anchors are needed for this option and enough line should be on hand to allow a scope of at least 10:1 for each anchor.
Hurricane Holes are ideal locations to moor your boat during a tropical storms, high winds and even hurricanes. These deep, narrow coves or inlets are best when surrounded by sturdy trees which block the wind and provide a tie-off for anchor lines. A hurricane hole needs to be far enough inland to avoid the most severe winds and tides.