foggy
difficult to see because of thick mist /ˈfɒɡ.i/
storm
very bad weather with wind and rain /stɔːm/
thunder
loud noise during a storm /ˈθʌn.dər/
lightning
a flash of light during a storm /ˈlaɪt.nɪŋ/
Examples
"It was very foggy this morning."
"A big storm is coming tonight."
"I heard thunder last night."
"Did you see the lightning?"