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Debris avalanches, debris flows and slush slides warning yellow level for parts of Innlandet, Viken, Vestfold og Telemark

2

Yellow level

Published: Valid: from 20.04.2023 07:00 to 21.04.2023 06:59
Next forecast before:
  • Danger ongoing: Monday afternoon 17. Apr. 2023
  • Height: 0 - 1200 moh

Oppdatert informasjon -

Oppgradert: Kommuner i Vestfold, Agder, Oslo og midtre deler av Viken. Nedgradert: Kommuner i Innlandet og nord i Viken.

Consequence

Landslides may be expected. Exposed railways and roads may be closed. Debris flows may reach the valley bottom even if they are triggered high in the terrain.

Advice

Keep yourself updated about the development of the weather, the landslide and flood situation, and follow the weather radar. Keep away from steep slopes, as well as streams and rivers with high discharge. Keep water paths and culverts free of snow, ice, gravel, waste, twigs and leaves. Clogged waterways with dammed water may cause landslides. River erosion may trigger minor soil slips, which again may reduce the soil stability along the river. Be aware of such soil slips in areas mapped with quick clay, and areas with marine deposits. If such observations are made, do not hesitate to alert responsible municipal emergency staff at the local kommune.

Description

Risk of slushflows is especially high in areas with less than 1 meter deep snow. The snow may in some places be fully water-saturated. Slushflows are triggered even in relatively gentle slopes, where water accumulates. Slushflows follow terrain depressions and may develop into debris flows. Steep slopes, as well as streams and rivers with high discharge, are particularly exposed. Heavy snowmelt is expected.