Friday, July 25, 2008

A rant on hurricane "hype"

Posted at Weather Nerd:

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[N]ow that hurricanes have become a political football, a bizarre and infuriating phenomenon occurs every single time a hurricane hits land but fails to adhere to the direst of warnings. Out of the blogospheric woodwork come the village idiots, complaining of all the purportedly overheated “hype” and “doom and gloom” predictions that were once again unwarranted. “The forecasters said it would be worse than this!” they jeer. “This proves they’re a bunch of alarmists!”

The distinction between “would” and “could” is totally lost on these people. No, forecasters didn’t say it would be a disaster; they said it could be a disaster. And it could have been. Did forecasters emphasize the worst-case scenarios over the less dire scenarios? Yes — as they should! Only with 20/20 hindsight is it possible to look back at a storm and know exactly which warnings were necessary and which ones weren’t. In real time, forecasters and disaster planners have to assume that the worst-case plausible scenario will occur. They have no choice!

Because worst-case scenarios are just that -- scenarios, out of a wide range of possible scenarios -- they usually don't happen. Yet if forecasters were to choose the grossly irresponsible course of ignoring or downplaying the worst-case scenarios, and then one of those scenarios did occur, the forecasters would be rightly pilloried (including by these same village idiots, no doubt) for failing to warn and protect the public!

Critics are holding forecasters to an impossible standard. When it comes to issuing warnings of disasters that are realistically possible but (of course) not guaranteed to occur, forecasters are damned if they do, damned if they don’t.

Why does this make me so angry? Because those who unfailingly, thoughtlessly and relentlessly snark at forecasters (and, ahem, weatherbloggers) for these “incorrect” predictions — never mind that, in most cases, what actually occurred was within the predicted probability cone, so the predictions weren’t actually “incorrect” at all — are more than just ignorant idiots (though they are that). They’re dangerous idiots, because they give aid and comfort to the fools who, when subsequent storms threaten their lives and property, ignore warnings of imminent danger.

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Read the whole thing.

P.S. If you're wondering, I put the above-quoted excerpt inside asterisks, instead of a blockquote, because a lengthy blockquote is ugly and hard to read in my current Blogger template. Gotta work on that.