Friday June 10 – Our weather pattern continues to be dominated by a cool flow from the north so when we get surges of heat the clash can be violent. That is what we expect this weekend. The surge of heat will push the mid 90s into central Maryland. But the colder air and faster upper level winds will spread its impact into southern Pennsylvania and perhaps clip northeastern Maryland (Harford/Cecil Counties) to northern Delaware. New Jersey and New York are prime targets for the threat of storms turning severe with high winds, large hail, and isolated tornadoes Saturday.
The general air flow will be from the northwest as colder air wraps around a large and strong upper level Low in Canada. That direction comes down from the mountains is often weakens in central Maryland. That is why areas north of Baltimore are more likely to get rough weather Saturday.
Below we can see the strong upper level winds that will arrive and then force colder air back in for a few days. But tracking the severe storms is not as easy to see now. So to be frank, we have to see how the cells develop to know where to track them during Saturday afternoon and evening. The one guarantee is that temps will be hot this weekend, then cooler next week.