A storm glass allows you to predict the weather of the next 24 to 48 hours. Several crystal formations appear or disappear according to atmospherical changes.
The observations by tempsvrai started in July 2008. Here we show the results, so you can use these for your own forcast.
The current observation point is located at Nierstein, 15 kilometers south-southeast of Mainz.
More information about the storm glass are available at ▸Wikipedia.