Summer-like weather will continue this week with quite warm and humid conditions and additional chances for showers and thunderstorms. While it may be hard for the atmosphere to rebound from yesterday's "hard work", there is the chance for more showers and thunderstorms this afternoon and evening and any shower or storm that forms can produce heavy rainfall. It won't be quite as hot today as it was on Monday, but high humidity levels will make it quite uncomfortable once again. Later this week, a storm will pull out of the Southeast US and ride up along the eastern seaboard. This scenario could bring heavy rainfall to at least portions of the Mid-Atlantic region along and east of I-95 from late Thursday night into early Saturday - something to closely monitor given the already well-saturated grounds in many spots. More showers and storms are possible around here later this weekend and into the early part of next week.
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A summer-like week is in store for the metro region with hot, humid conditions and multiple chances for showers and thunderstorms. In fact, there is a good chance of showers and thunderstorms later this afternoon and evening as a weak front arrives and some of the late day/evening storms can be on the strong-to-severe side with torrential downpours. Temperatures today are likely to climb into the low-to-mid 90's for highs and it'll stay hot and uncomfortable for much of the week. Later this week, a storm will pull out of the Deep South and potentially ride up along the eastern seaboard. If so, this system would enhance chances for heavy rainfall in the Mid-Atlantic region on Thursday night and Friday.
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Low pressure in the upper part of the atmosphere is shifting off the coast of the Northeast US today and this should result in rain-free conditions in the Mid-Atlantic region. There will be plenty of sun today and afternoon temperatures should peak not far from the 90 degree mark. It’ll get hotter on Friday with temperatures likely to climb into the 90’s and there can be some afternoon/evening shower and thunderstorm activity as a back door cool front approaches the area. The passage of the back door cool front should bring us back to the mid and upper 80's for highs this weekend and there should be some sunshine on both days. In terms of rain possibilities for the weekend, an afternoon or evening shower or thunderstorm cannot be ruled out on either day.
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An upper-level low continues to meander over the Northeast US and showers and thunderstorms will again “pin wheel” around this system during the afternoon and evening. Some of the thunderstorms will reach strong-to-severe levels with highly unstable conditions given the cool air aloft combined with warm lower levels of the atmosphere. Any thunderstorm that forms today can include heavy downpours and perhaps small hail as the freezing level is rather low in this pattern. The upper-level low will finally slide to the southeast by tomorrow and this will reduce the chances for showers and thunderstorms.
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It stays unsettled in the Mid-Atlantic region today as an upper-level low continues to meander over the Northeast US. This feature will drop southeastward by the end of the week and a cold front will arrive in the area on Friday night. High pressure should push in behind the front as we begin the weekend with another cold frontal system pushing towards us by Sunday night.
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An upper-level low is spinning over the Northeast US and showers and thunderstorms are pin wheeling around this system. Some of the thunderstorms will reach strong-to-severe levels over the next few hours with highly unstable conditions given the chilly air aloft combined with the rather warm lower levels of the atmosphere. Any thunderstorm can contain gusty winds, heavy downpours and small hail as the freezing level is rather low in this scenario. The best chance for the shower and thunderstorm activity will be north and east of the PA/MD border to northern New England, but a few storms can make it all the way down into northern Maryland, northern Virginia, and the Washington, D.C. metro region.
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It stays somewhat unsettled in the Mid-Atlantic region for the next few days as an upper-level low spins around over New England. This feature will drop southeastward by the end of the week and a cold front should arrive in the area on Friday night. High pressure should push in behind the front as we begin the weekend with another cold frontal pushing towards us by Sunday night.
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Temperatures will spike on Saturday in the Mid-Atlantic region after a comfortably warm day on Friday and the sudden warm up will be accompanied by plenty of instability in the atmosphere. Multiple waves of energy in the upper part of the atmosphere will shift eastward on Saturday from the Northern Plains across the Ohio Valley and into the Mid-Atlantic/Northeast US. In addition, there will be a frontal boundary zone extending all the way from the Northern Plains into the eastern Great Lakes and this too will help to create some instability. As a result, strong-to-severe thunderstorms will be possible in the Mid-Atlantic region on Saturday afternoon and evening; especially, to the north of the PA/MD border.
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High pressure will build into the region today and provide us with some sunshine, warm temperatures and comfortable humidity levels. On Saturday, high pressure in the Southeast US will funnel hot and humid air into the Mid-Atlantic region and temperatures could spike into the lower 90’s for afternoon highs. In addition, a frontal boundary zone will approach later in the day and it could result in some shower and thunderstorm activity in the Mid-Atlantic region. Some of the storms that form on Saturday and Saturday night in the Mid-Atlantic can reach strong-to-severe levels with heavy rainfall and damaging winds; especially, to the north of the PA/MD border. It stays very warm on Sunday – though likely not quite as hot as on Saturday – and there will be the chance of additional showers and thunderstorms as another frontal system arrives. Following the front, high pressure will build into the Mid-Atlantic region early next week and it is likely to become unsettled once again by the middle of next week.
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After a comfortable and rain-free day on Wednesday, the chance of showers and thunderstorms will increase again later today and early tonight as a weak frontal system approaches the area. The work week will end on another pretty comfortable note as high pressure centered over the Southeast US extends its reach into the Mid-Atlantic region. On the backside of this high pressure system, warmer and more humid air will push into the Ohio Valley and Mid-Atlantic regions this weekend and the chance of showers and thunderstorms will increase along with the heat and humidity. Some of the storms that form late Saturday into Sunday can be on the strong-to-severe side; especially, north of the PA/MD border. One final note, some of the very dry and dusty Sahara Desert air that has now pushed into the southern US can make it into the Mid-Atlantic region over the next few days possibly resulting in more colorful sunrises and sunsets.
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