Corrected entry: When Frank (the thunderbird) releases the amnesia liquid over New York, every No-Maj's mind is wiped, including those inside buildings. If that were to happen, there would not have been any time for a goodbye with Jacob, as the rain would have wiped him the second he was above ground. If the spell had given time for a goodbye, everyone inside buildings should remember the Obscurus attack and the spell would be pointless.
Corrected entry: When Newt chases one of his creatures through Central Park, the park is covered in snow and people are ice skating on a frozen pond. At any other time directly before or immediately after this scene and throughout the movie, there is no snow anywhere, and people are dressed for moderate weather.raywest