Can rain as much in one week as a normal September Østafjells

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This week started with a yellow danger warning in several places in southern Norway.

During 24 hours, more than 60 millimeters of rain fell in several places in Agder, Vestfold, Telemark and Viken. In the mountains there was even more.

Lifjell received the most precipitation in Telemark, where it fell as much as 125.9 millimeters in one day.

The danger warning is over, but it is not raining:

– It has been a little calmer today, but it will be a little more tomorrow, and even more Thursday, says meteorologist Rannveig Eikill at the Meteorological Institute to Aftenposten.

Waiting for the whole September normal

So much rain is in store that Eikill says it can rain as much Østafjells this week as it usually does throughout September.

– Then I reckon with the precipitation that came yesterday. It has been a dry August in southern Norway and a dry September until now. Yesterday there were a lot of more places. In some places, such as Stokke in Vestfold, it fell to 50 percent of what is normal for this place in September. During the week, it can get over 100 millimeters in several places, she says.

According to the meteorologist, the trend in the country as a whole is that the further north one goes, the less precipitation. Østafjells is especially Sørlandet and south of Østlandet there will be a lot of rain. But also in the capital it will rain well and long.

– Today is the quietest day. It will rain for quite a few days ahead. Good weather has not been reported until once next week, says Eikill.

Stable weather

The cause of the precipitation is a high pressure in the east which meets a low pressure in the west. It provides a supply of moist air from the south.

– And then there will be precipitation in southern Norway, says Eskil. The weather conditions are stable, so a rain awaits all week.

Although there is no danger warning now, it may return.

– One must follow, says the meteorologist.

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