A large chunk of the middle part of the country will see wet, potentially stormy weather as a system moves through the Plains.

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.

A slow-moving system means rain could force those planning outdoor activities in the central and southern U.S. this holiday weekend to come up with a Plan B on one or more days.