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When Did Irene Stop Being a Hurricane?
jamesl writes "Cliff Mass, a climate researcher at the University of Washington and popular Seattle blogger, asks, 'When did Irene stop being a hurricane? ... there is really no reliable evidence of hurricane-force winds at any time the storm was approaching North Carolina or moving up the East Coast. ... I took a look at all the observations over Virgina, Maryland, Delaware, New Jersey, and New York. Not one National Weather Service or FAA observation location, not one buoy observations, none reach the requisite wind speed. Most were not even close. ... Surely, one of the observations upwind of landfall, over Cape Hatteras or one of the other barrier island locations, indicated hurricane-force sustained winds? Amazingly, the answer is still no.' Cliff supports his statement with data from NOAA/NWS/NDBC presented in easy to understand charts."
Get it thru your head. It isn't the Category, it is the rain.
Read up on Hurricane Camille and what it did to Virginia as a Tropical Storm. Not even a Category 1, and that was after going full inland from Mississippi, up and then over the Appalachian Mountains.
You'd be awed at what a foot of rain, in mountainous terrain, over a period of about 4 hours will do.
Learning HOW to think is more important than learning WHAT to think.
This was still a nasty storm.
No argument about that. That doesn't qualify it as an "evacuate NYC"-level of false alarm, however.
You're right, but only in hindsight.
Problem is, the time it takes to really "evacuate the island" is somewhat longer than the window of accurate forecast for this sort of storm. So basically, you don't know that it's going to fizzle when you're making the call. You just know that if you don't, and it doesn't, you're responsible for thousands of deaths, and you didn't give them the information that would let them choose between holding out, or fleeing.
That's the government's job here, to provide the best recommendation for likely and possible, but not certain, worst cases. Even if it's a 20% likelihood. Not to spin a sugary story like this storm, (death toll: 38 as I post, btw), turned out to be.
To give you an example of things not going well, we had a serious blizzard here in Chicago this past winter. Town hall did not close Lake Shore Drive, because it really didn't look like it was going to be a problem in the near term (several hours of safety were predicted). They decided to leave LSD open to get people away from downtown quickly before the worst hit. The thing blew a portion of Lake Michigan (as snow) onto the drive in a space of about 10 minutes. Basically, they had the right call, but then 10 minutes later, everyone on LSD was stranded and in danger of freezing to death. It was the damnedest thing I've ever seen.
This happened because the storm was particularly large, not because it was necessarily intense.
Now imagine that happens when millions of people are trying to clear out from a larger affected area, and the nature of the problem becomes apparent. In Chicago's case, 10 minutes later, after making a reasonable, responsible but ultimately wrong decision, they were hosed. Apologies all round. We pulled together and dug them out.
What made this call was the size, not the intensity. There is more than one metric than wind speed at work here. There is moisture content, and radius, and tornadoes on the border. Even as a tropical storm, it deluged Vermont. Imagine if it had still been merely a Class 1 when it hit New York. That might have been a serious emergency. And historically, hurricanes like Irene have ambled unpredictably up the East coast for centuries. It's not beyond the realm of imagination or even history. Any time something that big forms, no matter the current intensity of wind, which is capable of throwing large parts of the Atlantic onto Manhattan, you have to err on the side of caution. For the tunnels, evacuation routes may be flooded, which will then leave a lot of people stranded in traffic on suspension bridges in high winds. Manhattan is hard to clear once the festivities begin.
This should give us pause to consider how hard it is to run a decent, rapid civil defense action on Manhattan. They're sitting ducks. If anything comes of it, we should realize and amend that so they don't have to make decisions like this so far beyond the window of reliable prediction. Not grouse about their lack of a Palantir to divine the will of nature.
Until such time? They made the only decision they could. Individuals may choose to hold out, once the risk is firmly their choice and they have good information, but governmental bodies really and truly can't.
Sorry if you were inconvenienced by the "mistake."