Above average temperatures leave no doubt as to whether summer has arrived across the Upper Peninsula this week. Steady winds out of the south keep warm, muggy air mixing into our area this afternoon. Daytime highs along the western interior are expected to reach into the low 80s. As is typical for this time of year, inland/onshore pressure differences will result in a lake breeze, keeping points along the shore several degrees cooler.Meanwhile, Canadian high pressure keeps much of the U.P. mainly sunny and rain-free to start the work week. However, with the lake breeze and low level moisture already in place, we could see pop up rain showers and a few thunderstorms across the eastern U.P. this afternoon.The latest disturbance to cross the High Plains is expected to keep the threat for scattered showers and thunderstorms in the forecast overnight, into Tuesday. A few storms could become strong enough to produce damaging winds and hail Tuesday afternoon into Wednesday. However, the heaviest rainfall is expected to occur well to our south. Warm, humid conditions continue through midweek.By Thursday, we will begin to see temperatures sinking back to around average with highs falling short of the 80 mark. Relative humidity values will also begin to fall, allowing for comfortable daytime conditions. The weekend looks dry and mainly sunny with highs right around average! That should make for just one out of what we hope are many more practically perfect summer weekends ahead!