Someone said that it might snow tomorrow.
Explanation:
* Reported speech: We are reporting what someone said.
* Reporting verb: "Said" is used to introduce the reported speech.
* Tense shift: The original sentence uses the modal verb "may," which is in the present tense. In indirect speech, we shift it to the past tense "might."
* Time shift: "Tomorrow" in the original sentence refers to the day after the utterance. Since we are now reporting the statement, we need to adjust the time reference. This can be done by leaving "tomorrow" as is, or by being more specific about the day it was supposed to snow.
Example with more specific time:
> Someone said that it might snow the following day.