The Lehigh Valley could get rain and thunderstorms to start the next week.

Showers and storms are possible Sunday night into Monday, according to the National Weather Service in Mount Holly, New Jersey.

Saturday should be sunny and clear, with highs in the 80s, for Musikfest attendees. The 10-day festival in Bethlehem kicked off Friday.

A system should come to the area late Sunday night and Monday morning, and the Lehigh Valley is under a marginal risk of excessive rainfall and severe thunderstorms during that time period, according to forecasters. There is a slight risk of excessive rain Monday night, the weather service said. Flash flooding could also come from any excessive rainfall.

Rain is possible in the afternoon and evening hours most days next week, however forecasters said Monday will likely be the most active day.

Here is the extended forecast from the National Weather Service:

Sunday: A chance of showers after 5 p.m. Mostly cloudy, with a high near 86. South wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Monday: Showers, with thunderstorms also possible after 11 a.m. High near 84. Southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday: A chance of showers and thunderstorms after 2 p.m. Partly sunny, with a high near 85. Chance of precipitation is 50%.

Wednesday: Showers likely and possibly a thunderstorm after 2 p.m. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.

Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.

Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 40%.