Wednesday, August 19, 2015

Danny Who?

Here's a thought: it's been ten years since Wilma blew into town and flooded Key West just months after Katrina wrecked New Orleans. No one across the U.S. noticed Key West go under water as the Crescent City's drama made everyone question their survival rating. It was my second season dispatching, I was hired right before the awful 2004 summer season of constant hurricanes and a year later I was taking calls from people whose homes were collapsing and whose streets were flooding. But, unlike New Orleans Key West did not see a break down in social order. I remember bums collecting supplies floating out of Kmart and putting them up on ledges out of reach of the flood waters. People got stuck on their roofs, cars floated away, but no one drowned and vigilantes didn't strut around waving guns. It was no fun but it wasn't distopia. I felt good about Key West. From NOAA this image of North Roosevelt; Hurricane Wilma sucked:

With Tropical Storm Danny churning around in the South Atlantic and predicted to become a Category Two storm before reaching the Caribbean this might be a good time to remember a great many people who live in the Keys have yet to enjoy their first hurricane experience. Key Haven wasn't spared by Wilma:

When the National Hurricane Center announced the Pacific El NiƱo promised us a lighter than usual season they did point out that "it only takes one." So could Tropical Storm Danny be the one? It's a bit early to say, let's face it.

The difficulty when facing the potential approach of a storm is that everyone has an opinion and those with no experience can be led to worry or worse can be persuaded to behave with a bravado that usually evaporates when it's too late. I've sat out a dozen storms but my job requires me to stay and facing 130 mile-per-hour winds from inside the police station is one thing. My wife the teacher evacuates the minute they close the schools. She leaves with Cheyenne and a tank full of gas before last minute traffic clogs the overseas Highway. The question is: what to do and when? The old timers, real and pretend, like to pontificate and act all certain. Me? Not got a clue. Sometimes people like to measure wind speeds as though the approach of a mere Category One is nothing to worry about. Maybe, but wind speed changes on a whim. It's all very mathematical but the Saffir-Simpson scale is just an attempt to measure the nature of Nature.

Saffir-Simpson Hurricane Wind Scale


The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 rating based on a hurricane's sustained wind speed. This scale estimates potential property damage. 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, however, and require preventative measures. In the western North Pacific, the term "super typhoon" is used for tropical cyclones with sustained winds exceeding 150 mph.

CategorySustained WindsTypes of Damage Due to Hurricane Winds
174-95 mph
64-82 kt
119-153 km/h
Very dangerous winds will produce some damage: Well-constructed frame homes could have damage to roof, 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.
296-110 mph
83-95 kt
154-177 km/h
Extremely dangerous winds will cause extensive damage: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.
3
(major)
111-129 mph
96-112 kt
178-208 km/h
Devastating damage will occur: Well-built framed 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.
4
(major)
130-156 mph
113-136 kt
209-251 km/h
Catastrophic damage will occur: Well-built framed 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.
5
(major)
157 mph or higher
137 kt or higher
252 km/h or higher
Catastrophic damage will occur: 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.

 


So, there's a week to see what's what....


And you may care to check out The Hebert Box if you live in Florida! Good Luck!

 

2 comments:

CJ said...

Great post. I consider myself a Category 1 weather nerd, but I had never heard of the Herbert Box. Fascinating! We're keeping an eye on the storm. Even in this day and age, their track and strength patterns are difficult to predict outside a day or two.

Trobairitz said...

Hurricanes sounds frightening. Although one of the things people have to deal with to live in paradise.