Temperatures today should spike to 90 degrees in the Philly metro region following the passage of a northward-moving warm front and there will be the chance for late afternoon and evening showers and thunderstorms. Some of the storms later today and early tonight can reach strong-to-severe levels with the potential of damaging wind gusts. It’ll remain pretty warm on Thursday, but then building high pressure into southeastern Canada will begin a downtrend in temperatures at week’s end and it stays cooler-than-normal through the upcoming holiday weekend. At the same time we start to feel the effects of cooler ocean air, low pressure will trek from the Midwest on Friday to the Mid-Atlantic coastal waters on Saturday. This system will result in the first widespread soaking rain event in some time for the Mid-Atlantic region. It'll remain cooler-than-normal on Sunday with continuing unsettled conditions, but much improvement is likely on Monday, Memorial Day.
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Last weekend was very warm in the Mid-Atlantic region with highs in many places like Philly and Washington, D.C. above the 90 degree mark on both days…this weekend will be quite a different story. The Memorial Day weekend has been unofficially called the beginning of the summer season, but it will be anything but beach weather this time around in the Mid-Atlantic region. Anyone who has been a long-time resident of this area knows that an ocean flow this time of year can result in highs in the 50’s and 60’s rather than the more desired 70’s and 80’s. In addition to the cooler-than-normal conditions expected this weekend, it looks like it will get started with a chilly, but beneficial rainfall from Friday into Saturday.
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After the much cooler weather of yesterday, warmer air will begin to push northeastward today on a change of wind direction to southerly from Monday's onshore flow and then a surge of unseasonably warm air is likely to arrive here on Wednesday. The surge of warmth on Wednesday will follow the passage of a northward-moving warm front and temperatures later tomorrow are likely to end up near 90 degrees with the threat of PM showers and thunderstorms. A cold front will drop to the southeast on Thursday from the Great Lakes region and high pressure will begin to build into southeastern Canada. As a result, temperatures will begin a downward trend late in the week as onshore flow forms in the Mid-Atlantic region and low pressure is likely to result in a chilly rain event from Friday into Saturday. Improving conditions are possible later this holiday weekend although it'll stay on the cool side.
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Anyone who has been a long-time resident of the Mid-Atlantic region knows that despite being dubbed the “first weekend of the summer”, Memorial Day weekend can actually turn out to be quite ugly with chilly and damp conditions. Indeed, the overall pattern appears to be setting up for just such weather conditions in the Mid-Atlantic region – at least for part of the upcoming long holiday weekend. All it takes this time of year to go from warm weather in the 70’s and 80’s to chilly weather in the 50’s and 60’s is for a strong high pressure system to build into the Northeast US or southeastern Canada. Indications are that this very well may happen this weekend likely resulting in anything but beach type weather for the Mid-Atlantic region.
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A much different weather picture today as we start the new work week compared to the past few days thanks to high pressure building to our north across southeastern Canada. As a result, an onshore low-level flow of air has formed and this has pushed in much cooler air to the Mid-Atlantic region from the western Atlantic Ocean. A warm front will lift northward through the region by early Wednesday and temperatures could soar at mid-week, but that surge in warmth will be rather short-lived. In fact, early signs for the long Memorial Day weekend are not all that promising with cool, damp conditions possible for at least part of the time.
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Strong and sprawling high pressure over the northeastern quadrant of the nation will continue to be the main player around here during the next several days and a key to the season’s first extended unseasonably warm stretch of weather. There will be a back door cool front that pushes from east-to-west across the region later today and low-level easterly winds will develop and likely knock off at least a few degrees in the temperature department compared to Wednesday’s highs and overnight lows should be in the 50’s. A stronger and more conventional cool front is likely to drop southeast from the Great Lakes region at the end of the weekend and its passage should usher in somewhat cooler air for the early part of next week following a very warm weekend.
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Sprawling high pressure will remain near the Mid-Atlantic region for the next several days and will be the main player in the overall weather pattern which should result in temperatures well up in the 80’s. A back door cool front will likely knock off a few degrees on Thursday and then a stronger cool front will arrive late in the weekend from the northwest.
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A surge in temperatures is about to take place in the Mid-Atlantic region with temperatures climbing well into the 80’s at mid-week along the I-95 corridor. Temperatures have yet to reach the 90 degree mark officially this spring in the I-95 corridor, but they have a pretty decent shot this week in the Washington, D.C. metro region and an outside shot in Philly and New York City. One wrench in the unseasonably warm outlook is the possibility that a back door cool front could knock off several degrees later in the week; especially, in the New York City metro region and coastal New Jersey.
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High pressure will remain near the Mid-Atlantic region for much of the week and will be the main player. There will be a couple of weak troughs of low pressure to deal with over the next few days and perhaps a stronger back door cool front this weekend. In the temperature department, the second half of the work week should feature the warmest weather we’ve seen this season with afternoon highs well up in the 80’s.
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High pressure will remain near the Mid-Atlantic region for much of the week and will be the main player. There will be a frontal system around the area later today that could touch off an isolated shower and we’ll have to watch for a possible back door cool front late in the week or during the upcoming weekend. In the temperature department, the second half of the week should feature the warmest weather we’ve seen this season with afternoon highs well up in the 80’s.
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