Two big weather stories going forward for the DC, Philly and New York City metro regions: (1) a heavy rain event is coming from later tomorrow night into Friday and it can be accompanied by strong thunderstorms and (2) an extended period of colder-than-normal weather from this weekend into the latter part of next week. This chilly stretch of weather could even result in accumulating snow in some of the higher elevations of the Mid-Atlantic region as well as in portions of the Ohio Valley and Great Lakes. Strong low pressure will form tomorrow in the south-central states - aided by tremendous upper-level energy - and then push northward towards the eastern Great Lakes. Colder-than-normal air pushes in this weekend following the passage of a strong cold front and thanks to the formation of a classic “omega”-shaped blocking pattern in the upper atmosphere, it will stay colder-than-normal for several days.
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There are two big weather stories going forward for the I-95 corridor region from DC-to-Philly-to-NYC: (1) a significant rain event for tomorrow night and Friday and (2) an extended period of colder-than-normal weather from Saturday through Thursday and this overall stretch could even result in accumulating snow in some of the higher elevations of the Mid-Atlantic region. Strong low pressure will form later today in the south-central US and then head towards the Great Lakes region on Thursday. Rain should overspread the I-95 corridor from west-to-east late Thursday and continue into Friday resulting in a soaking rainfall for DC, Philly and NYC of an inch and a half to two inches. Colder-than-normal air pushes in this weekend following the passage of a strong cold front and, thanks to the formation of a classic “omega”-shaped blocking pattern in the upper atmosphere, it will stay colder-than-normal around here and somewhat unsettled for several days.
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There are two big weather stories for the I-95 corridor region from DC-to-Philly-to-NYC going forward over the next week-to-ten days: (1) a heavy rain event is coming that will be centered on late Thursday night and Friday and (2) an extended period of colder-than-normal weather from this coming Saturday through Thursday of next week and this overall stretch could even result in accumulating snow in some of the higher elevations of the Mid-Atlantic region. Strong low pressure will form at mid-week in the south-central US and head towards the Great Lakes region later Thursday. Rain should overspread the I-95 corridor from west-to-east late Thursday or Thursday night and continue into Friday resulting in a soaking rainfall for DC, Philly and NYC. Colder-than-normal air pushes in this weekend following the passage of a cold front and thanks to the formation of a classic “omega”-shaped blocking pattern in the upper atmosphere, it will stay colder-than-normal around here for several days.
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A strong cold front passed through the region early this morning and the weather will improve today although it’ll become quite breezy and a bit cooler than yesterday It’ll turn even cooler on Wednesday and then another strong cold front will be headed towards the Northeast US later in the week. As this next cool shot closes in on the Northeast US, strong surface low pressure will form in the southern states supported by a vigorous upper-level system. The strong low pressure system area will push towards the Great Lakes later in the week and the result should be a soaking rain event in the DC-to-Philly-to-NYC corridor focused on late Thursday night and early Friday. Once the cool air arrives following that late week frontal passage, it will be slow to depart as an “omega-shaped” blocking pattern will unfold in the upper atmosphere across the nation. In fact, colder-than-normal conditions are likely in the Mid-Atlantic region from this weekend into late next week.
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A strong cold front is crossing the Ohio Valley today on its way to the eastern seaboard and thunderstorms have increased in intensity and coverage at mid-day across eastern Ohio and western West Virginia. The surface cold front currently stretches from the Great Lakes through eastern Ohio and into eastern Kentucky and will pass through the Mid-Atlantic region late tonight. While there is a threat for strong-to-severe thunderstorms tonight in the I-95 corridor, an even greater chance is likely just west of here in places like western and central Pennsylvania and West Virginia where a tornado watch has already been issued by NOAA's Storm Prediction Center.
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A strong cold front will approach the region later today from the Ohio Valley and it’ll turn windy and warmer with highs in the lower 80's. Showers and thunderstorms are likely early tonight (5-9pm) and some of the storms can reach strong-to-severe levels with damaging wind gusts and downpours. Cooler temperatures will return to the region for tomorrow and Wednesday following the cold frontal passage and there will be another big cool shot arriving in the Northeast US by the end of the week. Strong low pressure is likely to form later this week with that next cold frontal boundary zone and the result here is likely to be a significant rain event.
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Temperatures should climb into the 80's today with plenty of sunshine and then this warm up will peak on Saturday when temperatures climb to near the 90 degree mark. High pressure will build into SE Canada by Sunday and this will result in a back door cold front slipping down the Northeast US coastline bringing somewhat cooler conditions to the DC metro region. On Monday, a strong cold front will approach from the Midwest and it is likely to turn windy and warmer, but then cooler temperatures return on Tuesday following the frontal passage. As far as precipitation is concerned, there can be showers and thunderstorms in the wee hours of the morning and then both weekend days can include a couple of showers and thunderstorms, but most of the time on Saturday and Sunday should be rain-free. Later Monday, as a strong cold front arrives, showers and thunderstorms will become pretty widespread and some of the storms can be on the strong side.
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Much warmer air has moved into the Mid-Atlantic region and it’ll stay quite warm right through Saturday. The peak of this current warm spell will take place on Saturday afternoon when temperatures could soar to around 90 degrees for highs in parts of the I-95 corridor. A back door cold front will then drop southward through the Northeast US late Saturday night and it’ll turn noticeably cooler on Sunday in New York City, Philly and DC. After a brief warm up on Monday, it’ll turn noticeably cooler on Tuesday following the passage of a strong cold front and there are additional cool air masses coming our way as we progress through the month of May.
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Much warmer air will surge into the Mid-Atlantic region today and it’ll stay quite warm around here right through Saturday. Temperatures in the DC metro region should climb well into the 80’s during the next few days and there is a decent shot that a few places reach 90 degrees on Saturday. A back door cool front, however, is likely to cool it on Sunday. On Monday, a strong cold front will approach from the Midwest and it is likely to warm up again to near 80 degrees, but then cooler temperatures return on Tuesday following the frontal passage. As far as precipitation is concerned, a weakening frontal system can spark a couple of showers and maybe a thunderstorm later tonight into early Friday and both weekend days can include a shower or thunderstorm, but should be mainly rain-free. Later Monday, as a strong cold front arrives, showers and thunderstorms are likely and it'll turn cooler following the passage of the frontal system.
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Low pressure is now weakening and pulling away from the Mid-Atlantic coastline and it’ll begin to turn noticeably milder this afternoon in the DC-to-Philly-to-NYC corridor. A significant surge of warm air will then boost temperatures to well above normal levels on Thursday and it looks like it’ll stay very warm here right into the upcoming weekend. A weakening frontal system could spark a few scattered showers and thunderstorms tomorrow night and early Friday and a couple of showers and thunderstorms cannot be ruled on either day this weekend.
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