Fog and blowing snow can reduce visibility to 200 feet or less. The summit crew eats well, and samples plenty of scrumptious food which the week's volunteer prepares. The kitchen boasts a huge pantry, stocked with a six month supply of staple goods such as canned goods, dry goods, and frozen foods. Fresh produce, milk, and bread are brought up weekly on shift changes. Unfortunately, we have not yet found a pizza parlor which will deliver to the top of the mountain.
Rime ice is essentially frozen fog.
When the droplets freeze, they can form delicate, feather-like structures which grow into the wind at a rate of up to a foot an hour, coating everything in white. Wind speed is measured using either of two instruments. When winds are light, a three-cup anemometer records the velocity, as it is especially sensitive. Wind speed is measured by the rate at which the cups turn. However, stronger winds, over 30 miles per hour, tend to put a lot of wear and tear onto such an instrument, and cause its bearings to wear out prematurely.