The combination of an impressive upper-level short wave, a strong surface cold front, an increasingly moist southerly flow of air, and some low-level heating will help to generate showers and thunderstorms later today into tonight for the region from DC-to-Philly-to-NYC. Some of the thunderstorms that form will likely reach strong-to-severe levels with potential damaging wind gusts, downpours, hail and even isolated tornadoes. Then, after a couple of nice weekend days with noticeably lower humidity, interesting weather could return early next week. A warm front will approach from the Ohio Valley on Monday and showers and thunderstorms are likely to return to at least portions of the Mid-Atlantic region and this could turn into a significant rain event; especially, near and south of the PA/MD border.
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The combination of an impressive upper-level short wave, increasingly moist southerly winds, and a surface cold front will generate showers and thunderstorms for the I-95 corridor later today into tonight. The activity is likely to be focused on the late afternoon and evening hours and some of the storms can reach strong-to-severe levels with potential damaging wind gusts and hail. The front clears the coast by tomorrow and that'll set the stage for nice weather on Saturday and Sunday with noticeably lower humidity levels. A warm front will approach the region from the southwest early next week and the threat for showers and thunderstorms will increase again in the I-95 corridor by later Monday.
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High pressure will generate a nice day around here and then we’ll have to deal with another frontal passage to close out the work week. As a result, showers and thunderstorms are possible on Friday and Friday night and some of the storms can be strong, but there should also be some sunshine as well during the day. The bulk of the upcoming holiday weekend looks decent, but a warm front could increase chances again for showers and thunderstorms by Monday night or Tuesday.
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A slow-moving cold front will push far enough off the east coast today to allow for high pressure to build into the region and humidity levels should drop during the day. Tomorrow promises to be a nice day with plenty of sunshine and comfortable conditions. Another front will cause some scattered shower/thunderstorm activity by Friday, but the weekend is looking pretty decent. By late in the day on Monday, a warm front will approach from the southwest and the threat for showers and thunderstorms is likely to increase.
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One of the keys to the generation of strong-to-severe thunderstorms later today in the I-95 corridor has to do with how much sunshine can poke through the current rather widespread band of low clouds and patchy fog. If some brightening skies were to occur – and prospects are quite good – then this would help to generate some low-level heating which, in turn, would cause instability in the atmosphere. In fact, the GOES visible satellite images from early morning-to-late morning show clearing skies are slowly advancing eastward across Pennsylvania and skies should brighten during the next few hours in areas to the north and west of the big cities along I-95. As a result, odds do favor the formation of showers and thunderstorms later today in upstream interior locations of the Mid-Atlantic and some of the storms that develop can become quite strong with damaging wind gusts, heavy downpours, and even hail. The most likely timetable for showers and thunderstorms to reach the DC-to-Philly-to-NYC corridor is 4PM to as late as midnight as activity will tend to be slow to arrive and slow to leave.
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A slow-moving cold front will continue to threaten the Mid-Atlantic region with showers and thunderstorms later today, and some of the storms can be on the strong side. The front should finally push far enough off the coast on Wednesday to allow for high pressure to build back into the area and a couple of nice days. Another frontal system will arrive by the end of the week and it’ll likely result in unsettled weather conditions on Friday and Saturday. All in all, however, the upcoming holiday weekend is looking pretty decent.
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High pressure will move offshore today and a slow-moving cold front will approach from the northwest tonight and Tuesday. With the approach of the slow-moving cold front, the chance for showers and thunderstorms will increase by late in the afternoon and that threat may continue right into tomorrow night. The front should finally pass through by mid-week and temperatures will be quite comfortable later in the week. In fact, there is still no extensive hot weather in sight for the Mid-Atlantic region as upper-level troughing will continue to dominate across the Northeast US and southeastern Canada preventing any sustained heat from building up around here.
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High pressure will build into the Mid-Atlantic region today and it’ll pave the way for another nice weekend in DC, Philly and NYC. Temperatures this weekend will climb well up into the 80’s on each day and there should be plenty of sunshine. A frontal system will approach the area early next week and it should bring about an increased chance for showers and thunderstorms by late Monday and Tuesday. Looking ahead, there is still no extended heat wave in sight for the Mid-Atlantic region.
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Low pressure will trek eastward today across Pennsylvania and it could generate occasional showers around here with a possible thunderstorm or two. The steadiest and heaviest rain from this system will fall south of the PA/MD border - much as it did on Tuesday with an early week cold frontal system. All of this activity dies down on Friday as high pressure pushes into the region and the weekend is looking quite nice for the I-95 corridor.
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The overall weather pattern will remain quite active in the I-95 corridor over the next 24 hours and it could result in some heavy rainfall and strong thunderstorm activity; especially, to the south of the PA/MD border. This will not be the conventional “late afternoon/early evening” timetable for the strong thunderstorms threat, but the main action will likely take place between late tonight and mid-day on Thursday although there can be some lingering activity later tomorrow afternoon. Looking ahead, high pressure will build back into the region on Friday and the weekend is looking quite nice from DC-to-Philly-to-NYC.
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