A weather station measures what is coming in the air. In dreams it is read as watching your own moods closely, and as the wish to feel prepared for whatever the inner weather brings.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.