Mississippi- horrific storm surge, no extreme winds ...

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BReb
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Mississippi- horrific storm surge, no extreme winds ...

#1 Postby BReb » Mon Aug 29, 2005 12:43 pm

anyone know why this is?

It sounds like they got the storm surge you'd expect from a category 5 hurricane, but the winds were more consistent with a category 3.

Could it just be wave momentum left over from when it was a category 5- once a hurricane goes from 175 mph to 140 mph, does the momentum of the higher waves last a while? Or might the low barometric pressure have allowed the storm to surge higher than the winds would suggest? The barometric pressure was almost always lower than the winds would suggest with this storm.
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JtSmarts
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#2 Postby JtSmarts » Mon Aug 29, 2005 12:45 pm

The same thing happened with Ivan, the surge already had built up from the time it was a Cat 5.
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#3 Postby djtil » Mon Aug 29, 2005 1:09 pm

barometric pressure has no direct "vacuum" effect on surge.........this is a common uneducated myth. surge is only the result of wind.
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#4 Postby Stormtrack » Mon Aug 29, 2005 3:18 pm

Did it come in at high tide? If so it adds that amount to the surge produced by the storm.
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#5 Postby Brent » Mon Aug 29, 2005 3:19 pm

137 mph is pretty extreme... and that was a confirmed gust in Biloxi.

I'm sure winds were stronger in other areas...
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