This may be my lack of meterology knowledge but have there been or are there likely to be dust storms at night? I keep thinking of waking up in the middle of the night (most likely O'dark Morning) coughing and hacking because my tent is full of dust due to a dust storm. Should I be sleeping with my googles and dust mask on?
now that I am writing this it sounds like a paranoid question. Perhaps I should just ziplock myself up at night. I could breath through a straw...

