The Storm Glass is a navigational forecaster invented in the 18th century, supported by admiral Fitzroy's sound scientific principles. It provides a way for navigators to predict the weather before sailing. Transparent crystals indicates clear and sunny weather. Measures 3.54 by 8.66 inches.
Cloudy crystals indicates cloudy or precipitation.
Small dots in the crystal indicates wet or foggy.
Cloudy glass with small stars indicates thunderstorms.
Crystal contains small stars during sunny winters, it will snow.