A slight chance of showers is forecast for Memorial Day in Denver, with the odds of rain and thunder increasing in the afternoon.

There’s a 30% chance of showers moving in after 11 p.m. Sunday night and a 40% chance of showers Monday morning before 11 a.m. Otherwise, Memorial Day will be partly sunny with a high around 71 degrees. We could see the warmest temperatures of the year so far later in the week. Wednesday is expected to reach 92 degrees.

Memorial Day is expected to be warm and sunny, but rain is expected on Saturday and the risk of dangerous rip currents continues to grow, officials said.

For some parts of the U.S., those planning outdoor activities for Memorial Day weekend might have to come up with a plan B. A rare nor’easter is underway in New England on Thursday, bringing strong winds and heavy rainfall.