Dunno about anyone else but last night i drove for about 20 minutes in proper blizzard conditions, it was snowing that heavy it was laying on the road even though there was plenty of traffic :| got back to my girlfriends house, turned it off for 20 minutes, then we were off out for a meal, jumped into my car switched it on. Started up fine but the steering wheel light was on and rev counter wasnt working. Then the oil light started to flash all the other dash lights came on and the car was beeping at me. Switched it straight off, let it settle a minute, got out and checked the oil, there was plenty in it (only serviced 3-4k ago). Jumped in started it up again and it did the same, yet it sounded fine and revved fine and i knew there was loads of oil in.
Long story short, girlfriends dad kindly gave us a lift and when i got back i turned the car on again and it was fine, also left it over night and it was fine this morning too. Think snow may have got in the engine compartment or something?