KBTX - Blogs - Hurricanes

New Saffir-Simpson Scale for 2009

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By: Rodney Harris
Updated: Tue 12:17 PM, Mar 09, 2010
The National Hurricane Center (NHC) has announced it will be removing the storm surge and flooding references from the Saffir-Simpson Hurricane Scale -- on an experimental basis -- for the 2009 Tropical Cyclone season.

The modified scale will be called the "Saffir-Simpson Hurricane Wind Scale". I emphasize wind because that's what the NHC will attempt to focus on when defining storms using this scale -- nothing more.

Scientists have found that the storm surge and flooding information included in the current scale can often be inaccurate and lead to a misconception on how strong a storm will be. This was evident when residents admitted they didn't plan on evacuating during Ike, because it was "just a category 2 storm".

Hurricane Ike was officially defined as a category 2 storm based on wind speed. However, the storm surge from Ike correlated to a category 4 or 5 storm.

Hurricane Katrina was officially a category 3 storm at landfall. It also produced a storm surge common with category 5 hurricanes.

Information on storm surge and flooding associated with tropical storms and hurricanes will still be provided in a variety of products from the National Hurricane Center and the National Weather Service. It just won't be included in the official hurricane scale.

We'll also provide this important information on-air and online, along with wind speed, pressure and other information related to tropical systems.

The storm surge is not determined by just the wind speed, but by the size of a storm and landfall location, among many other factors. So instead of providing pre-determined storm surge information related to wind speed, the NHC will provide the information separately.

I should also note: the NHC did provide accurate storm surge information for Ike in its forecasts and discussions. We also provided storm surge information here at KBTX Media. However, if you would have referred to the Saffir-Simpson scale -- which you're recommended to do -- it would have been inaccurate. By providing storm surge and flooding information separately, the idea is to reduce confusion.

This is an experimental change that will apply to the entire 2009 hurricane season. The NHC will determine whether or not to make the change for future seasons based on feedback.

What do you think?

You can visit the new Hurricane Center right here at KBTX.com
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