Stunning new analysis reveals just how unprecedented Harvey was

A study released Friday by Metstat, a weather-analysis company specializing in “detailed precipitation analysis” and “weather frequency analysis,” found that Harvey delivered a stunning once-in-25,000-year deluge over much of southeast Texas.

Some places saw an unimaginable once-in-500,000-year deluge, which translates to a 0.0002 percent chance of this deluge occurring in any given year. Probabilities that extreme “are calculated by extrapolating the distribution curves for precipitation observed over the last century,” Metstat’s Shauna Bokn explained.

via Stunning new analysis reveals just how unprecedented Harvey was – ThinkProgress

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