YOU SAID:

It is a bad morning because it is raining and thunder

INTO JAPANESE

雨と雷が降っているので悪い朝です

BACK INTO ENGLISH

It's a bad morning because it's raining and thundering

INTO JAPANESE

雨が降って雷が鳴っているので悪い朝です

BACK INTO ENGLISH

It's a bad morning because it's raining and thundering