Weather Analytics Company: Overall, Harvey A 25,000-Year Flood; In Some Locations 250,000-Year

[hatrack]

Hurricane Harvey’s landfall in Texas was “unprecedented” and “beyond anything experienced,” as the National Weather Service described it late last month. Now scientists are beginning to quantify just how unprecedented it 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.

Since global warming has been making extreme precipitation events more likely, however, the U.S. won’t have to wait 25,000 years to witness the next event of Harvey’s proportion. That’s especially true the longer the country is forced to reckon with President Donald Trump’s effort to undermine domestic and global climate action.

EDIT

https://thinkprogress.org/harvey-superstorm-study-25e60eeb4bd7/

[Gothmog]

1. Hurricane Harveys landfall in Texas was unprecedented and beyond anything experienced,

I agree with this

[eppur_se_muova]

2. Check back next year.

Harvey was the new precedent.