Ambient Weather AW-YG737S-RD Admiral Fitzroy Storm Glass and Galileo Thermometer During the historic voyage, FitzRoy carefully documented how the storm glass would predict the weather: If the liquid in the glass is clear, the weather will be bright and clear. If the liquid is cloudy, the weather will be cloudy as well, perhaps with precipitation. If there are small dots in the liquid, humid or foggy weather can be expected. If the liquid is cloudy, the weather will be cloudy as well. If there are small dots in the liquid, humid or foggy weather can be expected. A cloudy glass with small stars indicates thunderstorms. If there are large flakes, it will be snowy in the winter. Dimensions: Approximately 8" tall Galileo Thermometer: Number of glass balls: 5, Glass Galileo thermometer range: 64F  80F, Temperature is determined by lowest floating bulb