May 23-26, 2013 Heavy Rain Event:
A multi-day rainfall event from May 23-26, 2013 produced widespread rainfall totals of 2 to 4 inches across northern and eastern Maine. There were localized totals of 4 to 5 inches across parts of eastern Aroostook and coastal Washington Counties. A slow moving cold front approached the area from the west on Thursday the 23rd with a moist southwest flow aloft. Showers and a few embedded thunderstorms developed across northern Maine during the afternoon hours of the 23rd. The cold front slowly moved into northern Maine on Thursday night, and low pressure developed along the front and caused steadier rain to develop across northern and eastern Maine Thu night into Friday (24th). The cold front pushed just offshore into the Gulf of Maine Fri night. A trough of low pressure in the upper levels of the atmosphere approached from the west and stalled out along the southern New England Coast Saturday the 25th and interacted with the stalled out cold front. A very slow moving area of low pressure tracked along the front from the southern Gulf of Maine Saturday morning to along the Maine/New Brunswick border Sunday evening (26th). Significant amounts of moisture wrapped around the low and pulled deep Atlantic moisture into northern and eastern Maine with rain, heavy at times continuing into Sunday. The rain gradually diminished Sunday evening as the low pulled north of the area.