The Weather Rock
One of the cheapest and simplest weather prediction devices is the Weather Rock:
Although it's only good enough to predict current weather conditions, it's been in use for a long time and is expected to be in use for a long time to come.
|Dry Rock||Fair weather|
|Dusty rock||Dust storm|
|Shadow under rock||Sunny|
|Can't see stone||Foggy|
|White rock (wet)||Snow|
|Rock jumping up and down||Earth tremor|
|Rock under water||Airfield flooded.|
To construct your own, take one medium sized rock (or stone) and suspend it in a position from which it may easily be seen. It is reported that the Weather Rock is 100% accurate.
Last updated: 16 February, 2003 20:03