Quick Answer
Worsening weather in mountain environments can be identified by changes in cloud formations, temperature drops, and increased wind speeds. Observing a sudden change in cloud color, height, or movement can signal an impending storm. It's essential to recognize these signs to adjust your plans and stay safe.
Recognizing Changing Weather Patterns
Changes in cloud formations are a crucial indicator of worsening weather. Look for a rapid increase in cloud height, a darkening of cloud color, or a change in cloud movement. For example, if you notice a layer of clouds at 10,000 feet that’s spreading upwards, it may indicate a low-pressure system is approaching. Additionally, a sudden increase in cloud formation near the summit can be a sign of an intense storm.
Wind Speed and Temperature
A sharp drop in temperature, often accompanied by a sudden increase in wind speed, can signal an approaching storm. Be cautious if you notice a temperature drop of 10°F (5.6°C) or more within a short period. This can be a sign that a cold front is moving into the area. In mountainous terrain, a wind speed of 30-40 mph (48-64 km/h) or higher can make it difficult to navigate safely.
Avoiding Crevasses and Steep Terrain
When navigating steep terrain or crossing glaciers, be aware of the potential for crevasses to form. A sudden change in snow or ice conditions, such as a rapid increase in snowfall or a drop in temperature, can create hidden crevasses. To avoid crevasses, use a rope and follow established routes, especially in areas with a high concentration of crevasses. When traversing steep terrain, use your crampons and axe to maintain good footing and control.
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