Dean Was Third-Most Intense Hurricane
The Associated Press, Aug 21, 2007
The pressure in a hurricane's eye is often used to compare storms throughout history because in the past, wind gauges were often damaged or destroyed by powerful hurricanes. Now, technology exists to more accurately measure winds, said Jamie Rhome, a hurricane specialist with the
"And the damage is caused by the wind, so that's what most people look at," he said.
But pressure also measures strength: the lower the pressure, the greater a hurricane's power to suck in air. A hurricane's winds are blown because higher-pressure air rushes toward the lower-pressure eye to equalize the difference.
Typically, the lower the pressure, the faster the air speeds in. But because of other variables in each storm, a certain pressure does not always correspond to a specific wind speed.
Dean was a top-scale Category 5 storm at landfall Tuesday on
The only other storms that hit land with a lower pressure were the 1935 Labor Day hurricane that hit the Florida Keys and Hurricane Gilbert, which hit
Gilbert caused more than 300 deaths in Latin America and the
Only three other Category 5 storms have been known to hit land: the 1935 hurricane, Hurricane Camille in 1969 and Hurricane Andrew in 1992. Andrew had top sustained winds of 165 mph at landfall. Andrew was the second-most expensive hurricane in
Hurricane Wilma is the most intense Atlantic hurricane ever recorded in terms of pressure: It was at 882 millibars when it was in the Caribbean before it weakened ahead of landfall in the
The lowest pressure ever recorded in a tropical cyclone was 870 millibars in Typhoon Tip in the northwest