Residents northwest of Pittsburgh should remain alert for the possibility of isolated strong to severe storms on Saturday evening. While the risk is marginal, heavy rain and thunderstorms could lead to localized disruptions. Cooler temperatures on Monday and Tuesday may pose risks to sensitive plants, with lows dropping to the mid-30s°F (around 1°C) on Tuesday morning. The wet conditions over the weekend may impact outdoor plans, particularly on Mother's Day afternoon and evening.