By Thursday, low pressure will begin to intensify along the Carolina coastline and the tightening pressure gradient between the departing high pressure system and intensifying storm will produce increasingly strong NW winds in DC-to-Philly-to-NYC corridor and this will help to pull in some very cold air for the end of the week and beginning of the upcoming weekend. Temperatures are likely to bottom out in the teens in many suburban locations on Friday and Saturday mornings and they’ll struggle to pass the freezing mark on both days.
Looking ahead, another strong storm will impact California in coming days with heavy coastal rains and significant inland snows and this system will cross the country this weekend. By the time we get to the latter part of the weekend, there is a chance that moisture will begin to push into the Mid-Atlantic region and there will certainly be some cold air in place following the late week cold air outbreak. An initial wave of low pressure will likely head towards the Ohio Valley by the latter part of the weekend and then a secondary storm could form along the Mid-Atlantic coastline by early next week. As a result, there is the chance for snow or snow changing to rain in the Mid-Atlantic region in the Sunday/Monday time frame – but several days left to work out the details.
Meteorologist Paul Dorian