More than ten inches of rain has fallen during the past 30-days in virtually every state from Florida-to-Maine. These excessive rainfall amounts are quite impressive considering the fact that tropical moisture has not really been involved in the overall weather pattern other than perhaps across Florida earlier in the tropical season. In fact, the heart of the Atlantic Basin tropical season lies ahead beginning typically during the month of August and continuing into October with the climatological peak right around the middle of September. There is nothing yet on the horizon for the eastern US in terms of tropical activity; however, there is a concern that should a tropical system impact this region in coming weeks, the currently very well saturated grounds could set the stage for some flooding issues.
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After an unsettled second half of the weekend, the weather will settle down some today in the Mid-Atlantic region as weak high pressure pushes into the area. With plenty of sunshine today, temperatures should climb to 90 degrees for afternoon highs and the humidity will remain on the high side. A frontal system heads this way on Tuesday increasing the chances of showers and thunderstorms. The second half of the week will feature temperatures peaking out near 90 degrees and additional frontal systems will renew the threat of daily showers and thunderstorms.
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An unsettled weather pattern has returned to the Mid-Atlantic region and the threat of severe weather and heavy downpours is on the table. A spinning upper-level low over the south-central part of Canada will send multiple waves of energy in coming days around the base of the large-scale trough keeping it quite active in much of the eastern US. One such short-wave will enhance upward motion today in the Mid-Atlantic region and this will, in turn, increase the chance for some strong-to-severe thunderstorm activity…any shower or storm that forms can result in heavy downpours. The threat of showers and thunderstorms will continue on Saturday and Sunday with temperatures on both days peaking near the 90 degree mark.
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Many parts of the Mid-Atlantic region and Northeast US were hit by downpours this past weekend and during the first part of this week and another extended period of unsettled weather is about to begin in these same areas. Similar to this last stretch, this upcoming unsettled weather period will include the chance of heavy downpours, localized flooding and strong-to-severe thunderstorms...something not particularly welcomed in many parts of the northeastern quadrant of the nation.
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An unsettled weather pattern returns to the Mid-Atlantic region later today and heavy downpours/strong-to-severe storms will be on the table during this extended active time period. High pressure will push to the east of here this morning opening the door for more humid air to flow back into the region from the Gulf of Mexico. With the increase in moisture, there will be an increasing chance of showers and thunderstorms by later today/early tonight and this renewed threat of rain is likely to continue right through the upcoming weekend.
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High pressure will produce another rain-free day around here with hot and moderately humid conditions… afternoon temperatures likely peaking in the lower or middle 90’s. This same system will push to the east by tomorrow opening the door for more humid air to push back into the Mid-Atlantic region from the Gulf of Mexico. With the increase in moisture, there will be an increasing chance of showers and thunderstorms by late tomorrow and this renewed threat of occasional rain will continue through the weekend.
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High pressure to our west takes control of the weather today in the DC metro region and it should result in rain-free conditions through mid-week. It will become quite warm, however, as temperatures climb to 90 degrees this afternoon and into the lower 90’s on Wednesday, but overall humidity levels will remain fairly comfortable. Later in the week, the humidity will climb to uncomfortable levels once again as a southerly low-level flow of air develops on the backside of high pressure which will shift to the east of here. With the rise in moisture, there will be an increasing chance of showers and thunderstorms in the Mid-Atlantic region both on Thursday and Friday and this renewed threat of rain will continue through the weekend as well.
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After a very wet weekend in the Mid-Atlantic, the weather will settle down over the next few days and a more comfortable air mass with lower humidity has pushed into the region from the northwest. There can still be isolated showers and thunderstorms later today; however, Tuesday and Wednesday should be rain-free and it’ll turn very warm. Humidity levels will build back up later this week and this will come with an increasing chance of showers and thunderstorms.
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Many parts of the Mid-Atlantic region were hit by downpours on Saturday and the threat for more torrential rain continues today as we close out the weekend. A vigorous system sliding east across the Ohio Valley will enhance upward motion in the region and low-level moisture remains high. As a result, any shower or thunderstorm that forms later today and tonight can produce significant rainfall amounts on top of what fell yesterday leading to flash flooding concerns. In addition, enough destabilization may occur in the atmosphere to help generate sever thunderstorm activity which could bring damaging wind gusts to many areas.
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The combination of high low-level moisture content and an incoming frontal system will keep the atmosphere quite unstable today in the Mid-Atlantic region. Some of the storms that form later today can be quite strong and some of the rain can be heavy. After perhaps a little bit of a reduction in the chances for rain on Saturday, a potent system is likely to drop southeast on Sunday from the Great Lakes to the Mid-Atlantic region. This system is likely to bring heavy rain to the Mid-Atlantic region on Sunday and potentially some strong-to-severe thunderstorm activity.
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