‘Abnormally high’ tides to sweep Tasmanian coast
Tasmanian coastline under threat of the highest tides in almost 30 yearsThe Bureau of Meteorology has warned of up to three days of storm surges expected to hit the Tasmanian coastline this weekend as a series of “abnormally high” tides – anticipated to be the highest in almost three decades – roll in.
Areas at most risk include Orford, Dover and Hobart on the south-eastern side of Tasmania and Strahan in the west.
A low-pressure system passing over the state from today coinciding with high astronomical tides could result in seawater flooding into low-lying areas, the bureau has warned.
Tides are expected to be up to half a metre higher tonight, on Saturday night and on Sunday night on the western coast, and this afternoon, tomorrow afternoon and Sunday afternoon for the eastern Tasmanian coast.
The areas at most risk include coastal waters and tidal estuaries, with structures located close to the water at the highest risk of being swept into the ocean.
“The highest tides will occur during Saturday and will bring the highest risk of inundation,” the bureau warned.
"Tides are expected to be about 40 to 50 cm higher than the standard astronomical tides during this time, and may be the highest tides experienced across southeastern Tasmania since 1994."
Tasmania experienced large tides twice in 1994 due to east coast lows coinciding with astronomical high tides with the higher of the tides experienced in September.
Tides are affected by atmospheric conditions such as low-pressure systems, as well as the rotation of the Earth and the gravitational pull of the moon.
This weekend’s high tides coincide with the low-pressure system and a full moon.
Tags
Please see our Editorial Guidelines & Code of Ethics (including for more information about sponsored content and paid events). The information published on this website is of a general nature only and doesn’t consider your particular circumstances or needs.
