The trick with making a wind sensor is that most are normally larger than your pocket with moving parts. After reviewing my options for solid state sensors, I've decided that my best bet is to use thermistors, which will be powered(to generate heat) and monitored. The idea is that an the speed of the wind will increase the rate at which the thermistor can dissipate heat, which we will be able to measure. A small plastic shroud will catch the different directions of wind passing them over separate thermistors on a small pcb. Additionally a MEMS compass will be included so the N/S/E/W direction of the wind can be easily known.

I'm hoping to also include a small LCD, some touch sense buttons, and a SD slot for logging the data.