A warm front pushed through Maine today and once it went by we saw clouds breaking for sunshine with soaring temperatures. It was 73 degrees at the Portland Jetport at 12 Noon with a southeast wind. By 2 PM the wind had shifted into the west and the temperature stood at 88 degrees. It ultimately topped out at 91 which tied the record high for May 26 that was set in 2010. It was the first time we broke 90 in Portland since September 2013.
In addition to this our dew points have also been on the rise and they will continue to climb as high pressure off the east coast continues to pump warm and humid air northward. The increasing moisture is going to contribute to the destabilization of the atmosphere on Wednesday which could result in afternoon showers or thunderstorms. Otherwise look for a partly sunny day with temperatures ranging from the 60s along the mid coast to near 90 in New Hampshire.
A cold front is expected to sink out of Canada on Thursday and move through our region during the afternoon. This will aid in the development of showers or thunderstorms as the front interacts with the humid air. Behind the front cooler and drier air will arrive for Friday only to be replaced by more heat and humidity on Saturday. Another cold front is expected to move through our region either Saturday night or Sunday morning.