Friday, October 7, 2016

How dangerous is Hurricane Matthew? The Saffir-Simpson scale details potential damage

Conceptual animation illustrates the wind damage associated with increasing hurricane intensity - courtesy of The COMET Program and the NOAA National Hurricane Center.

From KSat ABC by RJ Marquez

In the event of a hurricane or major weather event, it’s important to know the potential for property damage or loss of life.



The National Hurricane Center estimates potential damage by using the Saffir-Simpson Hurricane Wind Scale.

According to the National Hurricane Center, hurricanes reaching category 3 and higher are considered major hurricanes because of their potential for significant loss of life and damage.

Category 1 and 2 storms are still dangerous and require preventive measures.  

Here is the breakdown of the categories based on wind speeds.

 The Saffir-Simpson category describes only the WIND threat of a hurricane.

Category 1: Sustained winds of 74-95 mph  
Category 1 storms are considered to have very dangerous winds and will produce some damage. Potential for damage includes:  
  • Well-constructed frame homes could have damage to roofs, shingles, vinyl siding and gutters. 
  • Large branches of trees will snap and shallowly rooted trees may be toppled. 
  • Extensive damage to power lines and poles likely will result in power outages that could last a few to several days.
Category 2: Sustained winds of 96-110 mph
Category 2 storms are considered to have extremely dangerous winds that will cause extensive damage.
Potential for damage includes:  
  • Well-constructed frame homes could sustain major roof and siding damage.
  • Many shallowly rooted trees will be snapped or uprooted and block numerous roads.
  • Near-total power loss is expected, with outages that could last from several days to weeks.  

Category 3 (major): Sustained winds of 111-129 mph
Category 3 storms have winds that will cause devastating damage.
Potential for damage includes:
  • Well-built frame homes may incur major damage or removal of roof decking and gable ends.
  • Many trees will be snapped or uprooted, blocking numerous roads.
  • Electricity and water will be unavailable for several days to weeks after the storm passes.

 This animation of NOAA's GOES-East satellite imagery from Oct. 4 to Oct. 6 shows Hurricane Matthew making landfall on Oct. 4 in western Haiti and moving through the Bahamas on Oct. 6. TRT: 00:38.
Credit: NASA/NOAA GOES Project

Category 4 (major): Sustained winds of 130 - 156 mph
Category 4 storms have winds that will cause catastrophic damage.
Potential for damage includes:
  • Well-built frame homes can sustain severe damage with loss of most of the roof structure and/or some exterior walls.
  • Most trees will be snapped or uprooted and power poles downed.
  • Fallen trees and power poles will isolate residential areas. 
  • Power outages will last weeks to possibly months. Most of the area will be uninhabitable for weeks or months. 
Category 5 (major): Sustained winds of 157 mph or higher
Category 5 storms have wind that will cause catastrophic damage. Potential for damage includes: 
  • A high percentage of framed homes will be destroyed, with total roof failure and wall collapse.
  • Fallen trees and power poles will isolate residential areas.
  • Power outages will last for weeks to possibly months. Most of the area will be uninhabitable for weeks or months.
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