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Debris avalanches, debris flows and slush slides warning yellow level for høyereliggende strøk i Sør-Norge og sørlige deler av Trøndelag

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Yellow level

Published: Valid: from 25.05.2020 07:00 to 26.05.2020 06:59
Next forecast before:
  • Danger ongoing: Friday morning 22. May. 2020
  • Danger decrease: Wednesday morning 27. May. 2020
  • Height: 0 - 1200 moh

Oppdatert informasjon -

Noen kommuner i Møre og Romsdal er lagt til varslet. Varslet er også forlenget til å gjelde for tirsdag 26.mai.

Consequence

Debris avalanches/shallow slides: Soil slides and rapid movement of saturated soil in steep terrain. Debris flows: A "flood" of water, soil and rocks in steep creeks. Surface runoff in steep terrain can cause streams to change regular flow patterns. Slush slides: A flow of waterlogged snow. These landslides can start in relatively flat terrain and seek towards streams and steep slopes.

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.

Description

The soil is water-saturated. Steep slopes, as well as streams and river with high discharge, are particularly exposed. Risk of slush flows is especially high in areas with more than 40 cm snow. The snow may in some places be fully water-saturated. Slush flows are triggered even in relatively gentle slopes, where water accumulates. Slush flows follow terrain depressions and may develop into debris flows.