Debris avalanches, debris flows and slush slides warning yellow level for Vestlandet, Trøndelag and parts of Nordland

2

Yellow level

Published: Valid: from 19.01.2020 07:00 to 20.01.2020 06:59
Next forecast before:
  • Danger increase: Sunday evening 19. Jan. 2020
  • Danger decrease: Tuesday early morning 21. Jan. 2020
  • Height: 0 - 1500 moh

Consequence

Some landslides are expected. A few large events may occur. Exposed railways and roads may be closed. 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 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. Slush flows are triggered even in relatively gentle slopes, where water accumulates. Slush flows follow terrain depressions and may develop into debris flows. Debris flows may reach the valley bottom even if they are triggered high in the terrain.