AOL News has a new home! The Huffington Post.

Click here to visit the new home of AOL News!

Hot on HuffPost:

See More Stories
Science

Backgrounder: Early Warning Signs of a Hurricane

Jul 23, 2010 – 6:30 PM
Text Size
David Knowles

David Knowles Writer

(June 23) -- The modern world provides a host of ways to track hurricanes as they approach: TV, Internet, etc. But what if you found yourself without those technological means? What early warning signs would you look for to tell you a hurricane was on its way?

Increased Ocean Swell, Decreased Wave Period

As a hurricane approaches, ocean waves will increase in size, while the period between waves will decrease. Eventually, chop and whitecaps will begin to overtake the surface of the water.

Falling Barometer

If you're resourceful enough to have your own barometer, you'll notice that the air pressure it measures starts to fall as a hurricane gets nearer.

Marked Increase in Wind Speed

By the time you notice a big increase in winds, the oncoming storm may be less than 24 hours from landfall.

Rain Squalls

The outer rainbands of a hurricane can arrive several hours before the full force of a hurricane hits land.


And how do know the difference between a bad storm and a hurricane? Sustained wind speed. Tropical storms are classified as having winds of 39 mph or greater, while hurricanes have wind speeds in excess of 73 mph.
Filed under: Nation, World, Science
Follow us on Facebook and Twitter.


2011 AOL Inc. All Rights Reserved.

ON FACEBOOK