Skyhawk 172/Cutlass 172
Flight Crew Instrument
Flight Crew Last 90 Days 20; Flight Crew Total 2119; Flight Crew Type 1281
Airspace Violation All Types; Inflight Event / Encounter Weather / Turbulence
Flight Crew Diverted; Flight Crew Landed As Precaution
Weather
I was flying with a current WAC Chart; Garmin 430W and ForeFlight on an iPad with Stratus 2. The iPad overheated; so I turned it off. As I was over the BIL airspace I saw a black cloud to the southwest. I turned on the iPad and brought ForeFlight up. The weather showed thunderstorms and rain across my route. I called Flight Watch on 122.0 and learned that there were pop-up thunderstorms across my route. As I maneuvered while I called Flight Watch I may have dipped down into the top of the BIL airspace. I made the decision to land at BIL; called Tower and landed with radar vectors without incident. I realize that while I have spent recent time learning ForeFlight; I had not been practicing quickly locating airport information on the Garmin 430. I have now outlined and practiced better emergency use of my available tools and how to compensate for the loss of electronic aids.
C172 pilot experiences an iPad overheat enroute and turns it off. When dark clouds appear on the horizon the iPad is turned back on and pop up thunderstorms are being displayed on the NexRad image. Flight Watch is called and the decision is made to divert into BIL. BIL Class C may have been entered inadvertently while talking to Flight Watch.