The state meteorologic institute issued warnings that more heavy rain is due to pour down on Telemark and Aust-Agder counties and most of southeastern Norway Tuesday night. “It can be quite intense,” predicted meteorologist Elbjørg Moxnes.
“We’ve sent out warnings of 50 to 70 millimeters of rains in the course of 12 hours, beginning on Tuesday evening,” Moxnes told state broadcaster NRK. The heavy rain was expected to last until Wednesday morning.
The sun was out in Oslo Tuesday morning but heavy clouds were already in place by midday. Authorities warned that would be followed by such heavy rain that it could set off flooding and possible landslides.
Moxnes said that the heaviest rainfall would come between midnight Tuesday and Wednesday morning, with as much as 30 millimeters pouring down within a period of three hours. That was forecast to be accompanied by strong winds.
Residents were warned to raise any valuable items up off the floors of cellars, and to make sure that drainspouts and outdoor drains were clear of any debris. “Make sure all windows and doors are closed tightly if they’re located at low levels,” John Sverre Dahl, in charge of preparedness for the county governor of Vestfold, told NRK.