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Government Security News August Digital Edition

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Climate Change – This is what it’s going to look like!<br />

A dispatch from Baton Rouge from George Lane,<br />

GSN Columnist<br />

Thu, 2016-08-18 03:00 AM<br />

My son was evacuated Saturday<br />

night by boat in Lafayette, Louisiana.<br />

The National Weather Service<br />

(NWS) said this was a one in 500<br />

years flood; however, there have<br />

been 8 one in 500 year floods in this<br />

year alone, including one in Louisiana<br />

in March. This is what climate<br />

change will look in Louisiana. Here<br />

is why the disastrous flooding occurred;<br />

1.) “Inland Tropical Depression”:<br />

Flooding in Louisiana was fueled<br />

by a system somewhat similar to an<br />

inland tropical depression. Parts of<br />

Louisiana saw more rain than some<br />

U.S. cities have seen in the last few<br />

years combined. Deep, tropical<br />

moisture in combination with low<br />

pressure near the earth’s surface and<br />

aloft were the main ingredients that<br />

fueled the serious flooding in Louisiana.<br />

Simultaneously the Jet stream<br />

dipped into North Louisiana, providing<br />

a blocking force that kept the<br />

tropical storm over South Louisiana.<br />

On Friday morning, NOAA’s<br />

Weather Prediction Center said:<br />

“The best description of this system<br />

is that of an inland sheared tropical<br />

20<br />

depression.”<br />

The rainfall it<br />

produced was<br />

very similar<br />

to what one<br />

would expect<br />

from a<br />

George Lane<br />

slow-moving tropical depression or<br />

storm since rainfall potential is related<br />

to the forward speed of those<br />

types of systems. A weather forecast<br />

discussion from the National<br />

Weather Service in New Orleans<br />

Friday morning said that the moisture<br />

content in the atmosphere was<br />

higher than what has been observed<br />

there during some tropical cyclones.<br />

It was an all-time record for the area.<br />

When that much moisture is<br />

available in the atmosphere, thunderstorms<br />

can produce excessive<br />

rainfall of several inches in a single<br />

hour, leading to astronomical totals<br />

over time. While no one likely forecast<br />

24+ inches of rain in southeast<br />

Louisiana, this is the type of thing<br />

that can happen on a very localized<br />

scale in situations like this one.<br />

2.) River Records Shattered by 4 to<br />

6+ Feet: At least 8 river gauges have<br />

set new record highs in southeast

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