It does not replace avalanche training, professional mountain guide judgment, or an in-person avalanche course.
Avalanche terrain is inherently unpredictable. Data may be delayed, incomplete, or wrong.
The authors accept no liability for decisions made based on this output.
Always carry a transceiver, probe and shovel. Never travel alone. Complete an avalanche safety course before entering avalanche terrain.
I understand this is decision support only and take full responsibility for my own safety decisions.
Offline — showing cached data
Snow Patrol
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Avalanche Bulletin
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Outside automatic coverage — set danger level from official bulletin:
Add everyone joining the tour. Confirm each person's transceiver is on and transmitting before departure.
DCMR Pre-Tour Assessment
D — Danger
The avalanche danger level (1–5) is the single most important piece of pre-trip information. At level 3 (Considerable) human triggering on steep slopes is possible. At level 4 (High) it is likely. At level 5 avoid all avalanche terrain entirely.
Bulletin level–
Valid until–
Bulletin reviewed — danger level understood
Read the full bulletin text, not just the number
C — Conditions
Weather conditions directly load or weaken the snowpack. New snow, wind loading, rain and temperature swings are the main drivers of instability. Items auto-checked below are flagged from current weather data.
Wind creates dense wind slabs on lee aspects — often invisible from above
Rain or rapid temperature rise (>5°C in a few hours)
Rain immediately weakens the snowpack; warm temps cause wet avalanche risk
Strong solar radiation on steep S/SW/SE slopes
Spring: surface heating can trigger wet avalanches by mid-morning
Rapid overnight temperature drop after rain or mild spell
Forms a hard crust that can act as a sliding layer beneath new snow
M — Morphology
The shape of the terrain determines where avalanches release and where they run. Even moderate danger can be lethal in terrain traps. Check your planned route against the bulletin's elevation and aspect warnings.
Convex roll-overs on planned route (≥30°)
Convex slopes concentrate stress — most frequent release point
Cross-loaded gullies or terrain traps below
Even a small avalanche in a gully or cliff band can be fatal
Lee aspects in the route match bulletin problem zones
Cross-check your planned aspect against bulletin problem aspects
Cornices visible above planned path
Cornices can trigger avalanches far below them when they break
Route passes through runout zones of slopes above
Runout zones extend much further than people expect — up to 10× slope height
R — Route
A good route plan includes time windows, turn-around criteria, and known safe terrain (ridgelines, dense forest, valley floors) for each segment. One person at a time on exposed slopes; regroup only in safe zones.
Turn-around time agreed and communicated
Commit to a time before departure — not when you're tired
Safe regrouping zones identified for each steep section
Never regroup directly below an exposed slope
Descent route checked — often more exposed than ascent
Conditions change through the day; plan the descent before you start
Assessment Summary
This assessment is a decision-support tool only. It does not produce a go / no-go verdict.
Review all four DCMR factors, cross-reference with the current bulletin, and make your own informed judgment.
Final responsibility rests with you and your group.
Alarm Signs
👇 Tap any sign you observe — two or more active signs is a strong retreat signal.
⚠️ Multiple alarm signs active — strong consider retreating to safe terrain
Terrain at GPS Location
Elevation–
Slope angle–
Aspect–
Terrain Scan (AI)
AI scan is secondary support only. Flat light and fog significantly reduce reliability.