12:30 PM | While mainly rain-free, the weekend will not be without showers in the Mid-Atlantic region
[Strong upper level low in the Northeast US by Sunday morning]
The current synoptic setup is dominated by an upper-level trough situated over southern Canada that will amplify this weekend as it slides eastward across the Great Lakes region. As this trough intensifies and heads closer to our part of the country this weekend, it will send enough short wave energy into the Mid-Atlantic region to generate showers on both weekend days. The best chance for showers this weekend in the Mid-Atlantic region will be during the afternoon and early evening hours on Saturday and during the mid-day, afternoon and early evening hours on Sunday with a focus of the shower threat in areas north and east of the PA/MD border. In addition, as colder air moves into the upper part of the atmosphere this weekend, there will even be the chance for scattered thunderstorms to form in the Mid-Atlantic region on both weekend days. A west-to-northwest breeze is likely to stiffen noticeably during the day on Sunday as cooler air begins to move into the area - wind gusts up to 30 mph possible by afternoon.