A bathtub effect of water streaming back out of the Bay of Bothnia and Baltic has caused the Met Office to issue a warning for increased sea levels in southern regions of Denmark in particular.

Last week, westerly storms pressed large amounts of seawater eastwards, but with water levels lower west of Denmark, than in the Baltic, seawater will now be returning westwards causing increased tidal levels around Funen, Zealand and southeast Jutland.

“Water levels will rise for most of the morning, but around noon they will begin to drop again,” says Duty Flood Officer Jesper Eriksen.

The Met Office has issued a warning of up to 1.5 metres above the daily norm in affected regions.

“Winds are northwesterly, which means that the water that is returning cannot push up through the Belts,” Eriksen says, but adds that the increased water levels are not expected to cause major problems.

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