The Weather Page

March 22, 2007|By FRANK ROYLANCE | FRANK ROYLANCE,Sun Reporter

Way back in early February, Frank (not enough babies are named "Frank" anymore) Poole of Dundalk wrote to ask about tidal measurements: "I live on the water off Bear Creek and ... I watch the tides. What does the `height' measurement mean on the tidal charts?" Tide forecasts in the U.S. are usually measured in feet above something called "mean lower low water," or MLLW. That's the lower of the two daily low tides, averaged over 19 years. It's an average, so forecasts might be negative.

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