Friday 9 a.m.
Warm and humid conditions will prevail in the Middle Atlantic states through the weekend. From central New York state through much of New England, there is some uncertainty because of a very slow-moving front separating the summery air to the south from slightly cooler air to the north. As warm and humid air glides up and over the cooler air, clouds and spotty showers and thunderstorms can occur. This radar picture from 8 a.m. shows we are not just talking about light sprinkles!
In the video, we look at how the weather should evolve during the weekend and early next week.
In forecasting the future movement of tropical storms and hurricanes, a variety of computer models are run. The map below shows the tracks predicted by this plethora of models. While each track would produce a unique outcome (in terms of details), most are pointing to the possibility of a batch of heavy rain coming right up through the Middle and North Atlantic states early next week. AccuWeather.com will have stories and videos about the storm all weekend. Even if the tropical system moves away, a cold front from the west will have its own supply of showers and thunderstorms.
Here is the severe weather outlook for today from the NWS Storm Prediction Center. Note at the bottom the population in each alert area is listed. Keep in mind that in any given severe weather situation, the number of individuals directly affected is far less than the number of people potentially threatened.
South of the cold front, the air has become rather polluted. Sunshine operating on the hazy air will help to generate ozone. This map shows expected air quality for today.
The most intense and concentrated lightning zone yesterday was not associated with the eastern low pressure area but rather with a low pressure and a virtually stationary front in the Plains.
In response to cold air aloft, daytime heating at ground level and available moisture, showers and thunderstorms will develop today from Pennsylvania and southern New Jersey on south through Virginia.
Rain will be followed by sunny days in the Ohio Valley and parts of the Appalachians, but it may take two to three days for clouds and the threat of showers to inch east of the Northeast and Middle Atlantic coast early next week.