If you’re planning many outdoor activities this week, take along an umbrella — thunderstorms with hail are possible through Wednesday.

“We’ve got a frontal boundary basically sitting to our south and east, and it’s going to sag south through the rest of the day,” said Matt Sayers, 6News meteorologist. “Storms will be firing up along that frontal boundary. And that’s why we have a chance of rain for the next couple of days.”

•Latest forecast

The temperature will get up into the mid 70s under cloudy skies Monday. Sayers is expecting a 30 percent chance for severe thunderstorms in the afternoon and evening — there will be thunderstorms, but they will be scattered.

The chance for severe thunderstorms continues overnight for the Lawrence area, with the primary threat being large hail. The low will drop into the upper 50s.

Tuesday’s thermometer readings will be in the upper 70s, with south winds 10 to 20 mph. The skies will be mostly cloudy, with a 30 percent chance of thunderstorms.

Tuesday night’s low will drop into the lower 60s, with the chance of thunderstorms dropping to 30 percent.

Wednesday will be very warm, with the highs reaching close to 80. Skies should be partly cloudy, with a 40 percent chance of thunderstorms, according to the National Weather Service.

The chance for thunderstorms drops to 30 percent Wednesday night, with the low dropping to the mid 50s.

He said they are widely scattered storms