Current Danger Rating | Low (Green) | Moderate (Yellow) | ??? | Considerable (Orange) | High/Extreme (Red) |
Danger Trend/Forecast | Improving/Steady | Rising Slowly | Rising Rapidly | ||
Continue? Activity Data: | |||||
When | Past | Recent | Current | Current+ Widespread+ Same as You+ Human/Natural+ Large |
|
Number | None/Few | Many | Widespread | ||
Where | Far Away | In Area | Same as You | ||
Triggers | Large | Human | Human/Natural | ||
Characteristics | Small | Medium/Slabs | Large | ||
Continue? Snowpack Data: | |||||
Average Depth | > 2m | 1.5 – 2.0m | <1.5m | ||
Average Strength | Strong | Moderate | Weak | ||
Variability from Average Depth/Strength | Uniform | Somewhat Variable | Highly Variable | ||
Strong Over Weak Layering | Little/None | Somewhat Variable | Pronounced | ||
Compression Tests/ Rutschblock Tests |
CTH 30+ RB 7 |
CTH 20-30 RB 5-6 |
CTH 10-20 RB 3-4 |
CTH 0-10 RB 1-2 |
|
Danger Signs (Creaking, Whumphing, etc.) Propagation | Few/None Heavy Trigger/ Localized | Isolated Mod. Trigger/ Moderate | Widespread Light Trigger/ Wide Propagation | ||
Continue? Weather Assessment: | |||||
Storm | None | Snow 3+cm/hr+ Winds move much snow in start zone+ very warm temps &/or Rapid Temp Rise |
|||
Last No Go Storm Ended | > 48 hr ago | 36 – 48 hrs ago | < 36 hr ago | ||
New Snow (12 hr) | <15 cm | 15 – 30 cm | > 30 cm | ||
Blowing Snow | None | Some recently | Much recent/ current | ||
Temps/ Radiation | Cold - Cool/ None - Little |
Cool – Warm/ Some |
>0 &/or rapid rise/ Strong |
||
Continue? Terrain Assessment: | |||||
Incline | <25 | 25-35 | >35 | ||
Aspect (Wind Exposure) | Windward | Some Cross/ Lee | Much Cross/ Lee | ||
Trigger Points | None – Few | Some | Many | ||
Size/Traps | Small/ None-Few | Moderate/ Some | Large/ Many | ||
Other Factors (Terrain, Techniques, Human Factors) | |||||
Conclusion | Travel with Normal Caution | Consider Safer Options Increased Caution | Consider Safest Options Travel NOT Recommended on Terrain/ Snowpack | Travel NOT Recommended in Avalanche Terrain. | |
Consider Human Factors | |||||
If any criterion unknown, the danger condition is CONSIDERABLE- Orange stay in safe territory and get info. |