Snow, particularly heavy or wet varieties, can weigh about 21 pounds per cubic foot. This weight might not seem substantial, but it adds up quickly as snow accumulates on a rooftop. Before a roof collapses under the weight of snow, it exhibits warning signs that allow you to remedy the problem or evacuate the area.
Before hurricanes had names, Galveston, Texas was struck in 1900 by a storm that killed over 6,000 people. This event showed the importance of early warnings. The city was warned of the storm but not the high tides. From manned weather stations to the use of airplanes, early hurricane warning systems evolved in an effort to save lives and protect property.