BRISBANE, Australia—Tropical Cyclone Seth is expected to trigger dangerous surf and abnormally high tides as it begins to head south off the Queensland coast. The category one system was about 630 kilometres east northeast of Hervey Bay and 720 kilometres northeast of Brisbane, the Bureau of Meteorology (BoM) said early Sunday morning. It was moving south southeast at 29 kilometres per hour. Although maintaining its intensity, Seth is forecast to slow and shift southwest on Sunday afternoon. While unlikely to directly impact the coastline over the following 48 hours, the BoM said the cyclone would cause dangerous surf and abnormally high tides about the southeast Queensland and northeast NSW coastlines from Sunday. Severe weather warnings are current for both regions. The bureau says Seth should weaken as it transitions into a sub-tropical system on Monday. “Movement beyond this time becomes uncertain,” it said. “However there is a general indication that it will drift westward closer to …