The first half of the week will be cooler-than-normal in the Mid-Atlantic region with an upper-level trough of low pressure building aloft over the northeastern states. This system could help to spawn the formation of a low pressure over the western Atlantic which would enhance the chance of showers around here into mid-week and also keep a cool low-level flow of air well established. High pressure is likely to take back control later in the week and temperatures will remain on the comfortable side.
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A strong cool front passed through the region last night ushering in a refreshing air mass for today and the weekend with comfortable temperatures and humidity levels. In fact, it looks like temperatures will remain at comfortable levels through the first half of next week in the Mid-Atlantic region with high generally in the 70’s. In terms of precipitation, a disturbance over the Great Lakes later this weekend will move in this direction and it can set off some shower activity around here late Sunday night and Monday. This system will help to generate low pressure nearby which can lead to more unsettled conditions on Tuesday and Wednesday to go along with those still comfortable temperatures.
One final note, the Perseid meteor shower peaks later tonight/early tomorrow…there will also be a full (super) moon to contend with in the southern sky.
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A strong cool front will sweep through the region tonight and its passage will usher in a refreshing air mass for Friday, Saturday and Sunday with comfortable temperatures and noticeably lower humidity levels. In fact, temperatures should remain at pretty comfortable levels right through the first half of next week. In terms of precipitation, additional showers are likely this morning and a thunderstorm is possible, but the afternoon should feature clearing skies and generally rain-free weather. Late in the weekend, a disturbance over the Great Lakes will drop to the south and east and it can generate some shower activity for the Mid-Atlantic region late Sunday night and/or on Monday.
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Yesterday featured high heat and humidity in the Mid-Atlantic region, but a transition begins today to more comfortable conditions. A frontal system will settle into the area later in the day and become the focus area for new showers and thunderstorms. Any shower or thunderstorm that develops later today and tonight can produce heavy rainfall…watch out for localized flash flooding. A strong cool front will sweep through the region tomorrow night and its passage will usher in a refreshing air mass for Friday, Saturday and Sunday with comfortable temperatures and lower humidity levels.
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The Mid-Atlantic region is again suffering with high heat and humidity and temperatures are well up in the 90’s, but much relief is on the way for the end of the week and the upcoming weekend. The current air mass in the Mid-Atlantic region had its origins over the tropical Atlantic Ocean and the air mass headed our way for the late week and weekend will have its roots over northern Canada. Unfortunately, the transition from today’s high heat and humidity to the late week refreshing air mass will feature some shower and thunderstorm activity and some of that rainfall will be heavy at times with flash flooding on the table in some spots; especially, across Maryland, Virginia and the DC metro region.
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Today will be another hot and humid one in the Mid-Atlantic region as high pressure over the western Atlantic continues to pump in the high heat and humidity from our southwest. Big changes are coming, however, by later in the week. A weak front will begin the transition to more comfortable conditions bringing us the chance of showers and thunderstorms later today, tonight and tomorrow and there can be some heavy rainfall at times. A stronger cool front will sweep through the region on Thursday night paving the way for a refreshing air mass for Friday, Saturday and Sunday.
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The first couple of days of the new work week will be quite hot and humid as high pressure off the coast continues to funnel in the high heat and humidity from our southwest. Big changes are coming, however, by later in the week. A weak front will begin the transition to more comfortable conditions on Wednesday and Thursday and then an even stronger front will usher in comfortable air for the late week and upcoming weekend.
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Thunderstorms lit up the skies last night in much of the Mid-Atlantic region with vivid displays of lightning and the threat of showers and thunderstorms will continue today, tonight and tomorrow. A stalled-out frontal system will keep it unsettled around here into the weekend and any shower or thunderstorm that develops can produce heavy rainfall amounts in a short period of time….watch for localized flooding. The threat of rain will continue on Sunday, but the showers and storms on that day are likely to be less widespread than what is expected for the next couple of days. Copious amounts of clouds today and tomorrow will help to keep temperatures limited somewhat compared to Thursday - the hottest day of the week - but the humidity will remain at uncomfortably high levels right through the weekend.
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There will be a surge of high heat and humidity today into the Mid-Atlantic region and temperatures will climb to the middle and upper 90’s. There can be a late day and nighttime shower and thunderstorm and those chances form rain will increase on Friday as a frontal system stalls out nearby. The threat for showers and thunderstorms will likely continue through the upcoming weekend as the front meanders in the Mid-Atlantic region, but much of the time will be rain-free. Any shower or thunderstorm that does form over the next few days can produce heavy rainfall amounts in a short period of time.
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After a sunny and warm day here at mid-week, southwesterly flow will increase tonight and begin funneling in a hotter and more humid air mass into the Mid-Atlantic region from the Tennessee Valley. In fact, temperatures on Thursday afternoon are likely to reach their peak for the week climbing to the middle and upper 90’s in the DC-to-Philly-to-NYC corridor…maybe even a flirtation with the 100 degree mark in some spots. In addition to the heat, dew point temperatures will climb into the lower 70’s tomorrow indicative of high humidity levels making for quite uncomfortable conditions and heat indices above 100 degrees. After the high heat and humidity of Thursday, attention will turn to an approaching frontal system from the northwest that will be a slow-mover. The front will stall on Friday in an environment that will be very moist and - with some support aloft associated with a long-wave trough - ingredients may come together for numerous showers and thunderstorms including the threat of downpours. In fact, this same front is likely to meander in the Mid-Atlantic region this weekend and additional pieces of energy will rotate through the upper-level trough keeping it unsettled with additional showers and thunderstorms on the table. Any shower or storm that does this form this weekend will also have the capability of producing heavy rainfall in the Mid-Atlantic similar to what can take place on Friday.
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