Very mild air worked its way into our region Sunday night and with the sun coming out on Monday temperatures soared. Portland topped out at 55 degrees shortly before 1 PM which was a dramatic change from the frigid weekend weather. It appears that the warming trend is going to continue for awhile because the upper air winds are blowing straight across the country right now in what we call a zonal pattern. This tends to keep the really cold air bottled up in Canada and that is exactly what I expect to happen this week. A zonal pattern also lends itself to fast moving weather systems. Right now there is a frontal system moving through Minnesota and believe it or not this front will be here by Tuesday night. Clouds should quickly take over the sky Tuesday morning with rain showers arriving here late Tuesday night. The front will move off the Maine coast Wednesday morning bringing an end to the rainfall and allowing for some sunshine in the afternoon. High pressure is going to bring sunshine on Thursday and that day is looking to be the coolest one of the week with temperatures close to 40 degrees which is actually pretty close to normal. The high will move off to the east on Friday setting up a return flow of warmer air. The weekend is looking rather mild as well.