Question

"list the 4 requirements for a hurricane to form."

Answer 1

4 Stages of  Hurricane.

1. Tropical Wave - Wind speeds of less than 25 mph
2. Tropical Depression - Closed circulation, rotation, and sustained winds.
3. Tropical Strom - Thunderstorm activity moves over closed circulation and sustained winds reach up to 39 mph. 
4. Hurricane - When closed circulation becomes an eye, sustained winds reach 74 mph or higher. At this stage, the hurricane can cause significant damage.

Answer 2

Water
warm air
upper air weak
wind 74+ to be considerd a hurricane