Posted on 09/13/2018 5:07:30 AM PDT by EyesOfTX
As if hurricanes never existed prior to industrialization. Remind me again, how many SUV’s were being driven in Galveston in 1900?
Thank you! The local buffoons are already salivating at the possibility of Issac becoming a threat! I just wish they would monitor cold fronts in Alaska and predict when snowstorms will hit! We need winter- it’s in the mid 90’s for the rest of the month!
Or who was President when Harvey hit, and Issac( the storm they couldn’t ‘find’-that was over me for 3 days)! 8 days without power-UNTIL Obama came to town! Then, VOILA!
They always hype these dam things
Wishful hopeful anticipation?
They hope many will die.
Then the weather people, with their white capped teeth and other body enhancements, can dramatically move around and point at maps.
While the other alphabet channels blame Trump for being a heartless goon who does nothing while people are dying and starving!
The one doing the weather on BBC couldn’t just say Flooding she had to say Catastrophic Flooding D’oh
While that is true when it first made landfall in Florida, however, once it was in the Gulf it quickly intensified back to a Cat. 5 before retreating back to a category 3 prior to landfall in La. & then again in Miss.
Katrina weakened to a Category 3 before making landfall along the northern Gulf Coast, first in southeast Louisiana (sustained winds: 125mph) and then made landfall once more along the Mississippi Gulf Coast (sustained winds: 120mph). Katrina finally weakened below hurricane intensity late on August 29th over east central Mississippi.
But remember hurricane Andrew did make landfall as a Cat 5. One of only 3 to ever hit the U.S. since 1900.
https://www.u-s-history.com/pages/h2125.html
Quote:
“Saffir-Simpson Hurricane Scale
The United States uses the Saffir-Simpson Hurricane Scale developed in 1969. Categories are used to predict how much damage to structures is to be expected, how much flooding, and what the storm surge will be. Neither rainfall nor location is taken into account. These categories are:
Category One
Sustained winds: 74–95 mph
Storm surge: 4–5 ft
Central pressure: 28.94 inHg; 980 mbars
Potential damage: No significant damage to building structures. Damage primarily to unanchored mobile homes, shrubbery, and trees. Also, some coastal flooding and minor pier damage.
Example storms: Hurricane Agnes (1972); Hurricane Danny (1997).
Category Two
Sustained winds: 96–110 mph
Storm surge: 6–8 ft
Central Pressure: 28.50–28.91 inHg; 965–979 mbars
Potential damage: Some roofing material, door, and window damage. Considerable damage to vegetation, mobile homes, etc. Flooding damages piers and small craft in unprotected moorings may break their moorings.
Example storms: Hurricane Bob (1991); Hurricane Bonnie (1998).
Category Three
Sustained winds: 111–130 mph
Storm surge: 9–12 ft
Central pressure: 27.91–28.47 inHg; 945–964 mbars
Potential damage: Some structural damage to small residences and utility buildings, with a minor amount of curtainwall failures. Mobile homes are destroyed. Flooding near the coast destroys smaller structures with larger structures damaged by floating debris. Terrain may be flooded well inland.
Example storms: Great New England Hurricane of 1938; Hurricane Fran (1996); Hurricane Rita (2005).
Category Four
Sustained winds: 131–155 mph
Storm surge: 13–18 ft
Central pressure: 27.17–27.88 inHg; 920–944 mbars
Potential damage: More extensive curtainwall failures with some complete roof structure failure on small residences. Major erosion of beach areas. Terrain may be flooded well inland.
Example storms: The Great Galveston Hurricane of 1900; Hurricane Charley (2004); Hurricane Hugo (1989).
Category Five
Sustained winds: 156+ mph
Storm surge: 19+ ft
Central pressure: less than 27.17 inHg; less than 920 mbars
Potential damage: Complete roof failure on many residences and industrial buildings. Some complete structural failures with small utility buildings blown over or away. Flooding causes major damage to lower floors of all structures near the shoreline. Massive evacuation of residential areas may be required.
Example storms: Hurricane Camille (1969); Labor Day Hurricane of 1935.
Now if you look up the system, they JUST talk about wind speed.
Which is a load of crock, because storm surge does by far the most local damage to the spot hit.
https://www.nhc.noaa.gov/aboutsshws.php
So what category would you rate Hurricane Katrina as based just on its storm surge?
Hint, Hint...
“Katrina’s Storm Surge
A Weather Underground 16 part series about Hurricane Katrina, by Margie Kieper.
Hurricane Katrina of 2005 produced the highest storm surge ever recorded on the U.S. coast—an astonishing 27.8 feet at Pass Christian, Mississippi.
This bested the previous U.S. record of 22.8 feet, which also occurred at Pass Christian, during 1969’s Hurricane Camille. According to the NHC Katrina final report (PDF File), Hurricane Katrina brought a surge of 24 - 28 feet to a 20-mile stretch of Mississippi coast. Fully 90 miles of coast from eastern Louisiana to Alabama received a storm surge characteristic of a Category 3 hurricane. The colossal damage that resulted has been documented by blogger Margie Kieper during a series of blog posts that ran in the summer of 2006. The contents are reproduced here, and consist of an introduction explaining why the surge was so large, and 16 parts exploring the damage done to each stretch of the Gulf Coast ravaged by Hurricane Katrina in 2005.”
https://www.wunderground.com/hurricane/Katrinas_surge_contents.asp
And what Category would you rate Katrina at if you based it on Pressure?
Hint, Hint...
“Its minimum pressure at its second landfall was 920 mbar (27 inHg), making Katrina the third-strongest hurricane on record to make landfall on the United States, behind Hurricane Camille’s 900-millibar (27 inHg) reading in 1969, and the 1935 Labor Day Hurricane’s 892-millibar (26.3 inHg) record.”
“Katrina made its second landfall at 6:10 a.m. CDT on August 29 as a Category 3 hurricane with sustained winds of 125 miles per hour (201 km/h) near Buras-Triumph, Louisiana. Because Katrina had just weakened from Category 4 and due to the shape of the coastline, sustained Category 4 winds likely existed on land while the eye was over water. At landfall, hurricane-force winds extended 120 miles (190 kilometres) from the center, the storm’s pressure was 920 millibars (27 inches of mercury), and its forward speed was 15 mph (24 km/h). As it made its way up the eastern Louisiana coastline, most communities in Plaquemines, St. Bernard Parish, and Slidell in St. Tammany Parish were severely damaged by storm surge and the strong winds of the eyewall, which also grazed eastern New Orleans, causing in excess of $1 billion worth of damage to the city (see Effect of Hurricane Katrina on New Orleans).”
Thanks much! I missed the differentiation between the Saffir–Simpson hurricane wind scale (SSHWS), formerly the Saffir–Simpson hurricane scale (SSHS).
I found an explanation of why they moved away from the SSHS here:
https://www.nhc.noaa.gov/pdf/sshws.pdf
One of the newer measures of how bad a storm is is Integrated Kinetic Energy. (IKE).
I haven’t fully bought into this measure, because it is difficult to calculate and thus easy to fudge the numbers for political reasons.
Here is a master fudger in action:
“Sandy packed more energy than Katrina at landfall
By Brian McNoldy”
Extra-tropical Sandy was the leftists cause celbre of the day. So they wanted to make it ‘worse than’ Katrina.
In reality, extra-tropical Sandy was not even close to Hurricane Katrina.
“There is a metric that quantifies the energy of a storm based on how far out tropical-storm force winds extend from the center, known as Integrated Kinetic Energy or IKE*. In modern records, Sandy’s IKE ranks second among all hurricanes at landfall, higher than devastating storms like Hurricane Katrina, Andrew and Hugo, and second only to Hurricane Isabel in 2003.”
If you take out the two pretenders, Isabel and Sandy, Hurricane Katrina was number one in IKE.
A bit of fudging on the extent of the winds in this method goes a long way to boosting the IKE of a hurricane or a ‘extra-tropical’ storm.
“Hurricane Katrina was “only” a Category 3 storm at landfall, yet ended up being the most costly natural disaster in our nation’s history due its impact on a vulnerable, highly populated low lying city. Sandy had Category 1 winds at landfall yet was able to create very significant storm surge over hundreds of miles of highly populated coastline. Katrina’s IKE was more concentrated, Sandy’s IKE was more spread out. This metric - more than wind speed - encapsulates the respective storms’ horrific effects. Sandy may end up as the second most costly storm in U.S. history. Given its top ranking IKE and the area it impacted, that should come as no surprise.”
Yep, at the time I was a consultant working at the City of N. O. Katrina hit about 3 weeks after I started my contract. End up working on that contract for 11 years. Just recently went back there on a new contract.
Makes you wonder what these folks think caused hurricanes 5000 years ago.
Driving thru N’awlins after the storm...
to clarify 3-4 months after the storm.
Through a city with no electricity, no occupied houses, no other cars on the street, no places to stop for gas, food, etc.
That was truly amazing.
I was part of the effort to restore Ben Franklin high school - the number one public high school in the State of Louisiana, and the only 5 star public high school by a wide mark.
A was an officer in the schools PTA - the membership person.
When we the school board voted to turn the school into a type 3 charter - meeting was at city hall - 1/2 the audience was our students - and they all stood to support our being restarted.
Sigh. That was an amazing day.
About 800 kids in the school, about 200 per grade. Typically 35-40 of them were National SemiFinalists every year. EVERY year.
Simply an amazing school.
It was almost a month before they let me back into the City.
About the same here.
We almost went 3weeks after - but Hurricane Rita delayed that visit.
It was either 1-2 weeks after that for the first visit.
It helped that our effort was led by the football coach - who was a former marine.
And yet, we are expected to place all our confidence in the Weather Channel which only two days ago was calling Florence the Storm of the Century or the Storm of A Lifetime. In the end it proved to be just a storm with a lot of wind and rain. Notice the number of times the rare photo ops of storm damage are repeatedly shown. There is an amazing number of people crying wolf with this storm and who have been crying wolf for seemingly days on end to boost ratings and advertizing revenues. This may turn out to be the most damaging effect of this storm, not weather related but people related.
Florence. The short form of that is Flo. Flo is the spokesperson for Progressive Insurance. Therefore, progressives are complicit in the hurricane.
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