Ana tightens up and becomes tropical
Up until Saturday morning, Ana had been referred to as a subtropical storm, rather than a tropical storm. What's the difference? The difference lies is how the two different storms are "born." Subtropical storms are usually born of waters that are relatively lukewarm (as they would be at this time of year) and dry air is often drawn in, rather than moist air, and the storm does not have the upper atmosphere connection. Tropical storms normally are born of waters that are very warm (usually later on in the summer season) with moister air that is able to interact with upper atmosphere to create a well ventilated system pulling up air into the center and creating a very tight circular motion. Subtropical storms are usually much larger and cover a bigger area since they are not as well organized. Both types of storms can do a lot of damage, however,...