A front pushed into the region on Monday and has stalled-out nearby resulting in a continuation of unstable atmospheric conditions. As such, the chance for showers and thunderstorms will continue today with the highest chance during the afternoon and early evening hours. The front tends to dissipate by tomorrow and this may reduce chances for rain slightly on both Wednesday and Thursday. The unsettled weather pattern will return in full force, however, by the end of the week and for the weekend as well.
One final note, if you thought June was on the cool side of normal in the Mid-Atlantic region, you were correct. The month of June ended up 2.9 degrees below-normal in Philadelphia, 2.2 degrees below-normal in D.C., and 2.0 degrees cooler-than-normal in Central Park (NY). Temperatures reached the 90 degree mark for highs only once during the entire month in both Philadelphia and New York City and only four times in Washington, D.C. The month of May was also cooler-than-normal in all three Mid-Atlantic locations.
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The combination of an upper-level trough, high moisture content in the lower atmosphere, and a weak frontal boundary zone will be enough to result in very unstable atmospheric conditions in the Mid-Atlantic region from later today into early tonight enhancing the chance for severe thunderstorm activity. A somewhat similar setup will continue the chance of showers and thunderstorms on Tuesday, the 4th of July, with the greatest chance once again coming during the afternoon and early evening hours. Not all areas will get hit during this next 36 hours, but any thunderstorm that does form can contain torrential downpours, damaging wind gusts, hail and even an isolated tornado or two. The overall unsettled weather pattern that began in late June may relax a bit on Wednesday and Thursday; however, it should resume in full force by the end of the shortened work week and continue through the upcoming weekend.
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A front will approach the region later today and likely bring with it afternoon and evening showers and thunderstorms. Any thunderstorm later today and early tonight can be on the strong side with heavy rain and gusty winds. Unfortunately, the frontal system will hang nearby on Tuesday - the 4th of July - and the weather will be pretty much a repeat performance of today with the chance of PM showers and thunderstorms. The front will dissipate some by mid-week and the chance of showers and thunderstorms may become somewhat diminished on Wednesday and Thursday; however, the overall unsettled weather pattern lasts right into the upcoming weekend.
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Weak high pressure will remain in control of the weather as we head into the weekend, but then a couple of frontal systems will bring an unsettled weather pattern back to the Mid-Atlantic region. The threat of showers and thunderstorms will increase later tomorrow and there is a chance for some heavy rainfall late Sunday and Sunday night.
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Weak high pressure will stay in control of the weather today in the Mid-Atlantic region providing us with rain-free conditions and seasonably warm conditions. A couple of frontal systems will head this way by the weekend making for unsettled weather conditions from later tomorrow into early next week with a renewed chance of showers and thunderstorms.
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The weather pattern will settle down some from today into the first part of Friday as weak high pressure pushes into the Mid-Atlantic region. While a shower or thunderstorm cannot be ruled out this afternoon, any activity should be isolated and it’ll become less humid compared to recent days. The weather tonight and on Thursday should be rain-free for a change with comfortable temperatures for late June. The unsettled weather pattern returns to the Philly metro region later Friday as frontal systems head our way and it can remain so into the early part of next week with a renewed chance of showers and thunderstorms.
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Quite a wild night across southeastern PA with multiple strong-to-severe thunderstorms and torrential rainfall. At the peak of the event, there were as many as 80,000 people without power across the southeastern part of the state with many of them back on the grid early this morning. The very unsettled weather pattern will continue today in the Mid-Atlantic region as low pressure from the Great Lakes edges to the south and east along with a slow-moving cool frontal system. As a result, more showers and thunderstorms are likely from this afternoon into early tonight. Some of the PM storms can reach strong-to-severe levels and some of the rain can be heavy…watch out for localized flash flooding. Weak high pressure will attempt to improve conditions later Wednesday and Thursday limiting the chance of rain; however, the overall unsettled weather pattern will stay intact through the upcoming weekend with a renewed chance of showers and storms on Friday, Saturday and Sunday as a frontal system stalls in the area.
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The atmosphere will quickly destabilize today in the Mid-Atlantic region raising the chance for severe thunderstorm activity later today and early tonight. Any thunderstorm can produce large hail, damaging wind gusts and even isolated tornadoes. Torrential rainfall can lead to flash flooding conditions in the Mid-Atlantic region; especially, in those areas hit hard by downpours this past weekend. The threat for strong-to-severe thunderstorms will continue on Tuesday and the overall wet weather pattern looks like it’ll resume at week’s end after a short-break and continue into the first half of next week.
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A very unsettled weather pattern continues for the Mid-Atlantic region during the next couple of days that will include the chance for severe thunderstorms and torrential downpours. Any storm later today and tonight can produce hail, damaging wind gusts and even an isolated tornado. Torrential rainfall can produce localized flash flooding conditions. Low pressure will push to the Great Lakes today and a cold front will edge its way into the eastern states and this frontal system will not clear the area until mid-week. Later today, the upper-level support of low pressure over the Great Lakes will tend to become “negatively-tilted” and that will enhance upward motion in the region resulting in an increasingly unstable atmosphere and the potential of those severe thunderstorms. Weak high pressure should improve overall conditions by Thursday, but unsettled weather returns going into the weekend.
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After an unseasonably cool day on Thursday, it’ll turn slightly warmer today, but still below-normal for this time of year. The atmosphere will remain quite unstable with the chance of showers and thunderstorms and this unsettled pattern is likely to last well into next week. Some of the rain today in the Philly metro region can be heavy at times and some of the storms can be strong. Temperatures should peak in the mid-to-upper 70’s this afternoon and then reach 80+ degrees this weekend and early next week. A cool front will enter the picture later Monday enhancing the chance for strong-to-severe thunderstorm activity in the Mid-Atlantic region.
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