A 2-inch conduit can hold a wire for 200 amp service, 100 amp service enters in a 1 1/4-inch conduit and a 1-inch conduit holds a wire for a 60 amp service. Many conduits are oversized, so it's possible to have a 60 amp service entering your house in a 2-inch conduit.
The two main types of fog. Most common over land is Radiation Fog which occurs on clear nights with light winds. Radiation from the ground escapes out to space, the ground cools and, in turn, cools the air in contact with it. On an absolutely still night, condensation will occur on the ground to form dew. With slight air movement, sufficient condensation forms on condensation nuclei to form very small droplets of water - mist or fog. If the wind increases or a layer of cloud comes over, then the fog is likely to clear.
Fog normally occurs at a relative humidity near 100%. This occurs from either added moisture in the air, or falling ambient air temperature. However, fog can form at lower humidities, and can sometimes fail to form with relative humidity at 100%.