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The noon high tide was bad, but the midnight high tide could be worse

Powerful winds, rain, and some snow moved into Mass. Friday as part of a weather system that has prompted voluntary evacuations and sandbagging downtown.
Powerful winds, rain, and some snow moved into Mass. Friday as part of a weather system that has prompted voluntary evacuations and sandbagging downtown.

Around midday Friday, a set of weather conditions coalesced to send seawater through the streets of downtown Boston: A nor’easter parked itself off the coast, creating a storm surge that coincided with an astronomical high tide. It was the third-highest observed tide on record, according to the National Weather Service.

But there’s another high tide just before midnight Friday, and that one is expected to be worse.

The National Weather Service said on Twitter that while the noontime high tide reached 14.67 feet Friday, the high tide just before midnight is expected to crest at 14.9 feet.

The forecast for Friday night’s high tide is slightly below what Boston endured during the snow storm in early January, when the city broke its record for highest tide ever recorded at 15.16 feet. Friday night’s forecast is awfully close to the previous record of 15.1 feet, set during the Blizzard of ’78.

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The National Weather Service began keeping tide records in 1921.