A frontal system will produce generally one quarter to three quarters of an inch of rain (heaviest in eastern Maine) as it moves across the region Friday. This storm will be followed by High pressure...dry weather and north to northwest flow into early next week. The prevailing pattern for most of the week of April 12-15 will feature high pressure over and north of New England. While this will provide dry weather, its position to our north and east favors a period of light northeast/onshore flow over the Gulf of Maine.
Current information suggests that by the weekend of the April 17-18, blocking high pressure may become re-established over Greenland. Blocking over Greenland can favor a more stormy weather pattern over the Northeast and extend model guidance into the week of April 22nd is indicating the potential for a series of low pressure systems to affect the region. How the block over Greenland is oriented will affect whether these systems stay just to our north or pass to our south bringing the potential for heavier precipitation and northeast flow.