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Debris avalanches, debris flows and slush slides warning yellow level for valleys in western parts of Innlandet and Viken

2

Yellow level

Published: Valid: from 14.04.2023 07:00 to 15.04.2023 06:59
Next forecast before:
  • Danger ongoing: Thursday afternoon 13. Apr. 2023
  • Danger decrease: Saturday evening 15. Apr. 2023
  • Height: 0 - 800 moh

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 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. With the current forecast, certain parts of the region are more exposed. Details are found in the warning message in Norwegian. The soil water content will increase due to snowmelt. This will increase the danger of (slushflows and) landslides and debris flows along rivers and streams, and in slopes where there is snowmelt. The amount of precipitation, or its location, is somewhat uncertain. Follow the weather radar.