risk field outside weather outdoors dangerous nature travel rural sped up threatening boundary scenery threat sky time lapse timelapse usa united states tornado storm danger landscape scenic lightning clouds natural american scene day ominous colorado us rural scene wide shot landscapes lockdown nobody scenics travel destinations lock down north america stormy threats travel destination north american static may united states of america meteorology storms 2014 shelf cloud outflow locked down locked off long clip meteorological no one no-one one minute or greater rural scenes scenes stormchaser storm clouds speeded up stormchasing time-lapse