After 20 years, a look at the meteorology behind the storm Katrina

What started on August 23, 2005 as tropical depression, will soon become one on more and more antelles Malignant storm On record to hit the United States.

Traveling via South -East Florida, after being disintegrated on the Gulf coast and eventually on the Ohio Valley, cannot prepare those on the way to Katrina who are still running again since 20 years.

How was Hurricane Katrina formed

A tropical wave went from the coast of Africa to a west side in the Atlantic Ocean on August 11, 2005. As it crossed the central Atlantic and eventually reached the Leward Islands on August 19.

The tropical wave dominated the conversation and began creating a large area of ​​organized thunderstorms on parts of Puerto Rico.

On August 23, at 2 pm, tropical depression twelve was formed as a separate center of movement and was strengthening about 175 nautical miles at a distance of 175 knots in the south -east of Nasau, Bahamas.

As the storm hunter examined the storm system, Katrina got its name when it strengthened in a tropical storm with a maximum continuous winds of 40 mph on August 24, 2005, at 8 am, at 8 am, about 65 sea miles in the east-east of Nasau.

The tropical storm continued on a west-north-western route towards Katrina Florida, as the residents had the minimum time to prepare. Katrina became a storm in ET at 5 pm on August 25, 2005, with a maximum continuous winds of 75 mph. A Category 1 Storm has a constant wind speed 74-95 mph.

Katrina became a storm less than 2 hours before making landfalls in southern Florida.

Katrina made landfall in America three times

Also known as “The Forgotton Landfall”, the first of the three landfalls was done on August 25, 2005, Hollywood, Florida at 6:30 pm in ET, category 1 as a storm with a maximum continuous winds of 80 miles per hour. It spent about 6 hours throughout the night while traveling through the state of Florida, affecting most of Florida Everglades. Since it had no fuel source on the land, it quickly weakened back to the tropical storm position overnight with winds of 69 mph.

As Katrina continued towards her west and eventually reached the bay, she quickly gained strength. It became a category 1 storm on ET at 2 pm on August 26, 2005 over Eastern Gulf. Not only did it start strengthening it, but also had to go faster twice in the next 48 hours.

Rapid intensity occurs when the maximum continuous winds of a tropical cyclone increase by at least 35 mph in a 24 -hour period. Katrina jumped from 75 mph to 109 mph to 109 mph from 26 August to 27 August. From August 27 to August 28, it passed rapidly for the second time when it jumped from 115 mph to 167 mph.

Katrina reached her extreme intensity with a maximum continuous winds of 173 mph at 2 pm on August 28, at a distance of about 170 knots in the south -east of the mouth of the Mississippi River.

Katrina experienced an eyeball replacement cycle

Katrina was so intense in strength that it also experienced that an eyeball replacement is known as a cycle. This occurs when the eyeball, which is the strongest winds of the tropical system, reach their maximum capacity, so that another eyeball is formed outside it. It cuts fuel to the original eyeball and eventually reduces it, resulting in the system weakened, as well as. It happened to Katrina on August 28, causing rapid weakening of her second landfall on the Gulf coast.

This second landfall occurred on August 29, 2005 at 7:10 am, in Louisiana, with a maximum continuous winds of 127 mph as a category 3 storm. It quickly created a technical third landfall on ET at 10:45 am on the Louisiana-Misicippi border, which was a slightly weak range 3 storm with a maximum continuous winds of 121 mph.

If a storm is a category 3, 4 or 5, it is considered a “major” storm due to the ability to “life and the significant loss of damage,” the National Hurricane Center says.

As expected, the storm lost its fuel with hot water of the bay as it had gone to the ground. Katrina rapidly weakened to a tropical storm at the midnight of August 30, 2005, just 6 hours later from ET and a tropical storm. It became a tropical depression on the Tenasi Valley by 8 am on August 30, but at 8 pm that day, ET became completely infected in a residual low-open system.

Some facts and figures:

• The Federal Emergency Management Agency examined several observations of high storm growth, determining that the 24 to 28 -foot storm was observed along the Mississippi coast.

• With the highest east of Katrina’s eyes, there was also an increase of a storm to cross the interstate 10 in many places.

• Even after Katrina’s early threat, the intensity of the storm put a tension on the New Orleans Levy System. Leaves are either man -made or natural embankments that help control the flow of water to protect land and communities. The storm rose and broke through the path of Leves and floods, causing excessive floods in the New Orleans region.

• About 80% of New Orleans were flooded, with some depths to 20 feet within the first 24 hours of Katrina’s landfall.

• Katrina also produced a total of 43 tornades in Florida Keys, Georgia, Alabama and Mississippi.

• 1,392 was responsible for the total deadly Katrina, As 2023 report from National Hurricane Center. And according to the storm center, Louisiana said that people over 60 years of age led to most of Katrina’s deaths in that state.

• According to the Hurricane Center, Katrina contributed to a loss of $ 125 billion in 2005 – the most expensive in American history. Adjustment for inflation, it will be around $ 186.3 billion for $ 2022.

• On August 28, 2005 at 2 pm, at ET, Katrina’s measured barometer fell to 902 mbers, the fourth lowest on record in the Atlantic Ocean. However, the storm behind Rita and Hurricane Wilma has reduced the sixth, both later in 2005.

• When Katrina made a landfall in Buras, Louisiana, the measured pressure was on 920 mbers, which is the lowest on the record in the Atlantic Ocean for the storm in a intensity of 127 mph.

• The strongest continuous winds measured at a certain place on the ground from Katrina were at 4:20 am on August 29, 2005 at an ET of 88 mph.