National Weatherperson's Day is February 5. By coincidence, February 5 is a date that is particularly notable in the history of weather, from snow in San Francisco to the deadliest blizzard in history.
On November 13, 1833 the night became as bright as daylight, the heavens fell, and people feared that it was the end of times. The event was so dramatic that it sparked both a new religion and a new science.