The Historic Reproduction Storm Glass is a home décor weather instrument that helps you find out when bad weather is coming. Invented in the 19th century by sailor and meteorologist Admiral FitzRoy, this device is a liquid and crystal filled storm glass that can predict the weather up to 2 days in advance.
A halo is caused by the refraction of light through ice crystals in high cirrus clouds. Its presence indicates that low pressure is approaching and rain or snow can be expected within 24 to 36 hours. If the halo is broken, the open side indicates the direction from which the storm will come and signals that precipitation can be expected soon.