NASA compared the Isaac and Catherine

Ironically, Hurricane "Isaac" hit the U.S. in exactly seven years to the day the hurricane "Katrina" landfall in almost the same place in Louisiana. This fact has caused a wave of natural interest. Meteorologists have conducted a comparative analysis of the two storms.

"Katrina", of course, will always be remembered for the massive surge Surges, leading to the flooding of a large part of the coast to a height of 8.5 meters and conquered the previous record of Hurricane "Camille" (7.3 meters).
Surges tide hurricane "Katrina" August 30, 2005 © Tad Denson |

"Isaac" has also caused a great storm on the long (400 km) stretch of coast. Hurricane impact larger ocean surface, increasing the potential for tidal surge warnings.

Surges tide hurricane "Isaac," August 28, 2012. © Jonathan Bachman | Reuters

A while hurricane winds "Catherine" raged stretch of coastline extending up to 121 km. But, fortunately, "Isaac" was released on the coast is much weaker, "Katrina", the rank of Category 1 hurricane, whereas before it was a tropical storm. "Katrina" is landfall strength Category 3 hurricane, and before landfall was extremely powerful storm, the highest? Category 5.

Hurricane "Katrina" reaching the shore August 29, 2005 © satellite Aqua, MODIS | NASA
Surges tide "Isaac" reached 3.6 meters, which is very important for the "banal" Category 1 hurricane. Of course, the depth of flooding may vary depending on the shape of the coastline and the bottom. However, 3.6 meters more characteristic of tropical storms three hazard categories nezheli1 th.

Hurricane "Isaac" over Louisiana August 29, 2012 © satellite Aqua, MODIS | NASA

Satellite radar TRMM provides a unique opportunity to compare the physiology of two hurricanes in the 3D-images. "Katrina" (on the right) looks like a very symmetrical storm (a sign of a strong rotation), with a well-defined eye surrounded by a high fence of lightning towers generated intense convection (shown in red). "Isaac" (left) also has a well-developed cloud-spin, but the ring spiral toward the center less symmetrical and do not have eyes at the same time near the center also has several series of powerful storm clouds (shown in red).

3 Dizobrazheniya hurricanes. © Hal Pierce, SSAI | NASA

The analysis shows that most of their lives to prevent the intensification of "Isaac" was the invasion of dry air, as evidenced by the gaps in the surrounding field of precipitation (blue and black). Only when approaching the shore, he began active. If it was not pumping dry air, "Isaac," possibly came to the Gulf Coast more powerful vortex and was in many ways similar to the "Katrina."

Mission TRMM is a joint project of NASA and the Japan Meteorological Agency.


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