Just to remind ourselves: The US east coast blizzard prediction maps are NOT video footage!...for the simple reason there are most likely no weather satellites to record that in spite of we are TOLD and led to BELIEVE. The imagery that you see as weather forecast is a translation (from numbers to pixels) or modeling of data that comes from WITHIN our atmosphere. I am talking about thermometers, barometers, radar and weather balloons which combined supply sufficient data in order to produce a so called satellite view and thus render ASSUMED video footage from a real orbital 'weather' satellite obsolete.
NASA openly admits to this and it is easy to grasp once you know what to look for. Observe the recent Tweet by NASA and notice the used language in particular:
— NASA (@NASA) January 22, 2016