Tromsø

The windslabs from strong winds and precipitation over the past few days are in the process of stabilizing, but they can still be triggered by a skier. Especially where they lie above a weak layer of faceted crystals that amplifies the wind slab problem.

In sheltered, shaded high-elevation basins, conditions are favorable for faceting high in the snowpack. This is caused by the meeting of dry and moist snow combined with clear weather. This can make the wind slabs more sensitive and easier to trigger.

Cornices are generally large, and many of them can easily break under additional loading or naturally. Cornice failures may trigger larger avalanches in the terrain below.

If the sun gains strength during the day, it may trigger wet loose avalanches.

The windslabs from strong winds and precipitation over the past few days are in the process of stabilizing, but they can still be triggered by a skier. Especially where they lie above a weak layer of faceted crystals that amplifies the wind slab problem. In sheltered, shaded high-elevation basins, conditions are favorable for faceting high in the snowpack. This is caused by the meeting of dry and moist snow combined with clear weather. This can make the wind slabs more sensitive and easier to trigger. Cornices are generally large, and many of them can easily break under additional loading or naturally. Cornice failures may trigger larger avalanches in the terrain below. If the sun gains strength during the day, it may trigger wet loose avalanches.

Fokksnøflakene fra sterk vind og nedbør de siste dagene er på vei mot stabilisering, men det er fortsatt mulig for en skiløper å påvirke dem. Særlig hvis de ligger over et svakt lag med kantkorn som forsterker fokksnøproblematikken.

I skjermede, skyggevendte botner i høyden er det forhold for kantkorndanning høyt i snødekket. Årsaken er møte mellom tørr og fuktig snø, kombinert med klarvær. Dette kan gjøre fokksnøen mer påvirkelig og lettere å løse ut.

Skavlene er generelt store, og mange av dem kan lett knekke ved tilleggsbelastning. Skavlbrudd kan løse ut større skred i terrenget under.

Hvis sola får tak utover dagen, kan den løse ut våte løssnøskred.

Nedbør og vind fra tidligere i uka har dannet fokksnøflak av varierende hardhet. Mange steder finnes likevel myk flak eller løssnø som ligger oppå fuktig smelteomvandlet snø. Over ca. 300-400 moh er den gamle smeltepåvirkede snøen fryst til skare. Det ligger et lag med kantkorn i snødekket. Utbredelse er usikkert, men særlig høyt til fjells vil de være enklere å finne.

Sunshine, clear skies, and the Easter holidays can lead people to take more risks and plan bigger trips in the mountains. At the same time, sun and higher daytime temperatures increase the risk of cornice collapse and wet‑snow avalanches. The cornices are large and can trigger big avalanches when they break, sometimes activating weak layers deeper in the snow. Both natural and human‑triggered cornice falls have been observed this week. Keep a safe distance from cornices. At higher elevations, wind slabs and faceted snow may still be present in a few isolated areas.