Early results of federal rainfall study show dramatic growth in 100-year storm

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The standard used by area officials to estimate the amount of rain that would fall during a so-called "100-year storm" could be up to five inches short across Harris County, according to preliminary results of a highly anticipated federal study, a finding that promises to spur sweeping changes in development regulations, floodplain maps and infrastructure projects.

Preliminary results released by the National Oceanic and Atmospheric Association analysis of decades-worth of data show that across the county the "100-year storm" -- or a storm that has a 1 percent chance of occurring in any given year -- has risen by three to five inches in Harris County since the last study was conducted in 2001.

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PJYoung said:

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Early results of federal rainfall study show dramatic growth in 100-year storm

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The standard used by area officials to estimate the amount of rain that would fall during a so-called "100-year storm" could be up to five inches short across Harris County, according to preliminary results of a highly anticipated federal study, a finding that promises to spur sweeping changes in development regulations, floodplain maps and infrastructure projects.

Preliminary results released by the National Oceanic and Atmospheric Association analysis of decades-worth of data show that across the county the "100-year storm" -- or a storm that has a 1 percent chance of occurring in any given year -- has risen by three to five inches in Harris County since the last study was conducted in 2001.

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I expected this.

The Flood maps will get re-drawn, and a lot more houses will be in the 100 yr flood plain.

And remember, the 1% chance is any given year, so if you dont flood for 5 yrs in the 100 yr Flood plain, you are now up to 5% chance, and 6% next yr. 30% over the life of a mortgage.

It would help the flood insurance program if Mortgage Underwriters made flood insurance mandatory for 500 yr benchmark, just like the 100 yr requirement.

Sweet. Now more people can be forced to have insurance for an event that is very unlikely to occur. Sounds great!

BrazosDog02 said:

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Sweet. Now more people can be forced to have insurance for an event that is very unlikely to occur. Sounds great!

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Huh? How on earth did you come to that conclusion? I can't count how many 100-year floods I have experienced living in Houston for 48 years.