Simplify the following text for a Grade 10 native English-speaking person.
Original: With the passage of the trough line , the wind turns to the southeast , the humidity suddenly rises , and the atmosphere destabilizes , producing widespread showers and thunderstorms , sometimes severe .
Simplified: After the passage of the trough line , the wind veers southeast , the humidity abruptly rises , and the atmosphere destabilizes . This yields widespread showers and thunderstorms , sometimes severe .