High pressure will move offshore tonight which will allow a potent cold front to move in from the west. High thin clouds will increase this evening and into Sunday ahead of the frontal boundary with a few broken showers possible midday Sunday. The better chance for showers will be Sunday afternoon as the cold front will crosses the area.
A line of moderate to heavy rain will push through Maryland during the afternoon which may generate brief downpours and a few rumbles of thunder. Showers look to exit the Chesapeake Bay around the early evening hours and conditions will dry out Sunday night. Because the front will be quick moving, the threat for flooding will be low. As of right now, rainfall amounts look to range between .25-.50" with higher amounts expected closer to the metro and across central Maryland. Rainfall totals trend lower farther southeast of the city.
The cold front will not only bring the chance for moderate to heavy rain, BUT gusty winds will accompany the boundary as well. The Mid-Atlantic, the Northeast, and the central Great Lakes region will all be feeling the strong wind gusts associated with this strengthening low pressure system into Sunday evening.
It is looking quite windy across the area Sunday as computer models indicate southerly sustained winds increasing throughout the day, anywhere from 15-30 mph with winds gusts on top of that around 40-50 mph at times. Winds of this strength could bring down some trees and blow away outdoor decorations that are not secured... so I suggest bringing the decorations inside tonight!