Tropical moisture is flowing northward into the eastern US from the Gulf of Mexico, southwestern Atlantic, and the Caribbean Sea. This influx of tropical moisture is combining with a painfully slow-moving frontal system and a vigorous wave of energy in the upper atmosphere to fuel a widespread area of heavy rain that extends from Florida to the Northeast US. The heavier and steadier rain has moved into the DC metro region and should arrive in Philly this afternoon and New York City by this evening. The potential exists for as much as 1.5 - 3.0 inches of rain in much of the eastern US between now and mid-day Friday. Flash flooding will become an increasing concern given the heavy rainfall and the already pretty well saturated grounds. Winds will also be an important factor with this storm system as gusts could easily pass 50 mph in some spots; especially, near and along coastal regions - watch for power outages.
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A north-to-south oriented surface cold frontal system that trails low pressure over the Great Lakes is inching its way towards the east coast and the atmosphere will moisten up significantly ahead it with an influx of tropical air from the Gulf of Mexico, SW Atlantic, and Caribbean Sea. This influx of tropical air will set the stage for excessive rainfall later today and tonight in much of the eastern US extending from the Carolinas to New York State. In fact, given the very slow movement of the frontal system and the high precipitable water amounts expected, total rainfall amounts could end up between 1.5 and 3 inches and flash flooding will become an increasing concern given the already saturated grounds. The upper-level energy supporting the low pressure will move over the Mid-Atlantic region on Friday generating additional showers and maybe a thunderstorm or two. The weekend should start off on a decent note with some sunshine on Saturday and milder conditions after possible early morning lingering clouds. Another system, however, is likely to push more showers into the region by later Sunday afternoon or Sunday evening.
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The active weather pattern that we have been experiencing in the Mid-Atlantic region and Northeast US over the past few weeks will continue well into the month of May aided in part by a continuation of cold air outbreaks from Canada into the central and eastern US. The upper-level jet stream across the country is very active as we wind down the month of April and it has featured numerous strong waves of energy in recent days and another one has dropped southeastward into the Mississippi Valley region from southwestern Canada. This wave of energy aloft and its corresponding surface low pressure system will move very slowly over the next 48 hours due to a blocking pattern in the upper atmosphere over the southern part of Canada. These slow-moving systems and a painfully slow-moving surface frontal boundary zone will combine with an influx of tropical moisture to produce a major rain event from tomorrow into early Friday in the eastern US extending from the Carolinas to New York State. Localized flash flooding is likely to become a serious concern during this upcoming event with 2-4 inches of rain on the table in many areas.
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**A major rain event is on the way**...The active weather pattern that we have been experiencing in the Mid-Atlantic region and Northeast US over the past few weeks will continue well into May aided in part by a continuation of cold air outbreaks from Canada into the central and eastern US. The upper-level jet stream across the country as we close out the month of April is very active and has featured numerous strong waves of energy in recent days and another one is on the way. This next powerful wave of energy aloft will dive southeast from southwestern Canada into the Upper Midwest by this afternoon and then slide into the Mid-Atlantic region by late tomorrow. The combination of this wave of energy in the upper atmosphere, a painfully slow-moving surface frontal system, and a strong flow of very humid air up along the east coast will result in a major rain event for the Mid-Atlantic region on Thursday into Thursday night. Given the well saturated grounds from recent rains, this next soaking rain event could very well lead to localized flash flooding conditions – something to closely monitor. Looking ahead, the good news is that the weekend looks like it’ll start off with very nice weather on Saturday and it could hold on for much of Sunday as well before more showers return to the area.
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The active weather pattern that we have been experiencing in the Mid-Atlantic region and Northeast US over the past few weeks will continue well into May aided in part by a continuation of cold air outbreaks from Canada into the central and eastern US. The upper-level jet stream across the country as we close out the month of April is very active and has featured numerous strong waves of energy in recent days and another one is on the way. This next powerful wave of energy aloft will dive southeast from southwestern Canada into the Upper Midwest by tomorrow afternoon and then slide into the Mid-Atlantic region by late Thursday. The combination of this wave of energy in the upper atmosphere, a painfully slow-moving surface frontal system, and a strong flow of very humid air up along the east coast will likely result in a major rain event for the Mid-Atlantic region on Thursday and Thursday night. Given the well saturated grounds from recent rainfall, this type of potential significant rain event could very well lead to localized flash flooding conditions and will have to be closely monitored.
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A significant rain event is in the offing for the Mid-Atlantic region and it would primarily take place during the day on Thursday. Low pressure will push to the Great Lakes region at mid-week and a trailing north-to-south oriented frontal system will grind its way to the eastern seaboard on Thursday. The combination of this slow-moving front, vigorous energy aloft, and a long fetch of humid air up along the east coast from the Gulf of Mexico and SW Atlantic will likely result in some heavy rainfall around here on Thursday and localized flash flooding may become a concern. The good news is that after another unsettled day on Friday, the weekend is likely to start off with a nice day on Saturday, but another system could threaten us with showers by Sunday night and Monday.
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The overall active weather pattern will continue this week with a soaking rain event possible late Wednesday night and Thursday. High pressure will build into the region later today and it’ll turn out to be a pretty decent day on Tuesday. After that, low pressure will begin to influence the weather around here as it heads in this direction and there can be some heavy rainfall associated with it along with a thunderstorm or two from late Wednesday night into Thursday. A cool front arrives on Friday and then high pressure will make an attempt to take control during the upcoming weekend.
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A very active weather pattern will likely continue across the eastern half of the nation into the early part of May in large part due to a continuation of cold air outbreaks from Canada into the central and eastern US. The latest in a series of storms will continue to impact the Mid-Atlantic region today and then another system will arrive over the weekend with more rainfall likely from Saturday night into Sunday. Given the pretty well saturated grounds, the chances for localized flooding will be on the increase as we progress through this event and into the next one. More rain is possible by the middle of next week as this stormy and chilly pattern continues.
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A very active weather pattern will likely continue across the eastern half of the nation into the early part of May in large part due to a continuation of cold air outbreaks from Canada into the central and eastern US. These on-going cold air outbreaks are combining with increasingly warm and humid conditions across the southern US to help in the generation of storms and also has increased the chances for severe weather outbreaks; especially, across the southern states. In fact, tornadoes this year are running at above-normal levels and are the highest for the month of April since 2011. The next storm in a series of storms will impact the Mid-Atlantic region from today into late Friday and then another system arrives over the upcoming weekend and colder-than-normal conditions will persist through the period.
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Our active weather pattern will persist as long as cold air outbreaks continue to drop into the central and eastern US from Canada and indications are that this flow will continue into at least early May. The next storm in a series of storms is going to impact the region from today into late Friday. There can be a couple of showers this morning even with some ice pellets mixed in and there periods of rain develop late in the day. There can be some soaking rainfall in the overnight hours and into the day on Friday and, given the recent soaking rainfall, the chances for localized flooding will increase during this event. Yet another storm is likely to follow over the weekend with more rain from late Saturday into Sunday and this will be followed by yet another cold air outbreak during the early part of next week. Beyond that, you guessed it, another storm system may follow by late Tuesday and there can be more cold air behind that…and the same pattern just goes on and on and on.
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