A microburst is when a Cumulonimbus storm cloud releases its precipitation in a shaft that is intense and very localised. It can lead to an outflow of winds up to 100 mph (160 km/h) and tends to have a diameter of less than 2.5 miles (4 km), lasting around five or ten minutes.  

Julie Kramer (Member 59,280) saw this microburst containing snow unleashed from a Cumulonimbus passing through Eastern Idaho on its way to Wyoming, US. For anyone unlucky enough to have been underneath this cloud, this microburst probably didn’t feel very ‘micro’.