Originally Posted by andyd
I'm just glad the hyped " Category 5 " hurricane hit as a cat 2 . You live your life on the coast, storms happen. Population density is what causes the drama. The advantage of the pre-cautionary evac. means less people to care for. Makes fixing stuff easier. It is sorta like the Gov of MA. shutting down the commute during a blizzard. It is a kinda slap to your manhood, but gives you a chance to run the snow blower and tend to the house.
Who said Cat 5?
It WAS a Cat 4. Wind speed verified by direct observation.
The question was: would it remain so as it hit the coast?
I'm glad it weakened, but to think that it was anything other than a major hurricane is a mistake.
I'm also stunned by the "hurricane ignorance" displayed in this and other threads. Hurricane is a storm, yes, but to compare a "storm" to a hurricane is to compare a kitchen match with dynamite.
Even the "Super Storm Sandy" was a Cat 2 Hurricane when it hit the East Coast. Only Cat 2. It killed hundreds, including many in Massachusetts, and caused $70 billion in property damage, and had a modest storm surge of 8 feet in most areas, along with about 10 inches of rain. This storm is dropping over 20 inches of rain and is bringing a surge of over 12 feet. This storm is equal to, or worse, than Sandy in power.
The last Cat 3 to hit Massachusetts killed 68 people. Cat 2 hurricanes have killed hundreds when they hit New England, so, as a New England native, I am surprised how you view a hurricane. Perhaps you've not actually experienced one where you are.
It's also important to understand the effect of wind. The pressure on buildings varies with the square of wind velocity. So, a Cat 3 can bring three times the power (pressure on a building structure, or trees nearby) of a Cat 1. A Cat 5 can bring several times that.
https://en.wikipedia.org/wiki/Saffir%E2%80%93Simpson_scale
In fact, a Cat 2-3 Hurricane brings about as much wind as a Cat F2 Tornado, except that the Hurricane covers thousands of square miles, not just a narrow swath. I don't see anyone complaining that a Tornado is "Just some wind". Further, the atmospheric instability and high wind speed in a Hurricane often spawns tornadoes by the hundreds, as just part of the storm itself. A hurricane is millions of times stronger than a tornado. Far more damaging than a "storm".
However, the real threat in a hurricane isn't the wind, it's the storm surge. A storm surge isn't just wave height. We've got 6-8 foot waves on the Chesapeake Bay right now. No big deal. But the low pressure of a hurricane raises the sea level across hundreds of miles. That storm surge covers thousands of square miles. It's infinitely more powerful than mere waves. As that incredible mass of water (bigger in volume than a Tsunami) moves into bays, it can be amplified by the shape of the bay and the wind direction. The storm surge was nearly 14 feet in lower Manhattan during Sandy, which is why the subways flooded.
If you're interested in how much damage a storm surge can do, take a look at your coastal area here:
https://www.nhc.noaa.gov/nationalsurge/
And read up on the actual nature of a storm surge.
https://en.wikipedia.org/wiki/Storm_surge
The storm surge is what killed 8,000 people in Galveston in 1900. It's not just a "storm" or "big waves" or "high wind" that a hurricane represents, it's a combination of factors, with the surge being the real killer.
And real hurricanes not just "a Nor'easter" have killed in the past, so it's prudent to prepare, including by evacuation.