Without the specific haiku provided, I can offer guidance based on typical interpretations of haikus. In general, if a haiku portrays an approaching storm, the following conclusions might be valid:
- The speaker is concerned by the approaching storm.
- The mood is perplexed and curious. (if the speaker reflects on nature's unpredictability)
If the haiku instead evokes fear or apprehension about the storm, then The mood is foreboding and fearful could also apply.
Choose the two options that best fit the imagery and mood presented in the specific haiku you have in mind. If you provide the haiku, I can offer a more tailored response.