Showers and thunderstorms in the northwest and Caspian coasts until Thursday

I'd be happy to help translate this Persian news summary to English, but I notice you've only provided the headline. Could you please share the complete text including:

- The lead paragraph (marked with ▸)

- The bullet points (marked with •)

- The coverage-difference paragraph (marked with. )

Once you provide the full content, I'll translate it while maintaining the exact structure and markers you've specified.