As part of the Now Play This commissions programme, web artist/poet JR Carpenter and game designer/technologist Tomo Kihara are collaborating for the first time to create Weather Warnings, an online experience that is freely playable anywhere in the world.

In this project we use augmented reality and live weather data to overlay the user's surroundings with signage posing questions about past and present climatic conditions. Why is the sky so blue? Has it always rained? These signs call attention to the small changes in the climate already occurring all around us, inviting playful responses.

Have you encountered any mysterious, poetic, strange signs? Post them in this thread!