An all-out snowstorm is now underway in the local region and this system will impact regions all along the Northeast US coastline during the next several hours. Low pressure is intensifying this morning near the Delmarva Peninsula coastline and the atmosphere is very dynamic around here leading to heavy precipitation in the region. Given the strong dynamics in the atmosphere, there will be small-scale bands of intense precipitation and even some isolated “thundersnow” reports. These bands should produce quite a variation in snowfall rates with some areas getting pounded and others in a relatively dry slot. The brunt of the storm will take place later this morning and into the early afternoon hours and then the steadiest and heaviest precipitation will push to the northeast as low pressure slides up along the New England coastline. The snow is of the heavy, wet variety for now and it could weigh down some tree limbs to the point of breakage which could, in turn, lead to some scattered power outages. Temperatures have dropped dramatically since yesterday and will generally stay at or below freezing for the rest of the day and then drop into the teens in the overnight hours. Winds will pick up in intensity as the day progresses and the storm heads to the northeast. Accumulation amounts on the order of 8-14 inches are likely across the NYC metro region.
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All systems are go for a snowstorm late tonight/Thursday for the region from northeastern Maryland (near PA border) to Maine and this evening’s analysis will focus on current observations that are providing us with some clues as to what is likely to unfold over the next 12 to 24 hours.
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As a Penn Stater, let me borrow the phrase “white-out” which may very well describe the conditions for a brief time tomorrow morning in the Philly, NYC metro regions. The threat for a significant snowstorm continues for the Northeast US from northern Maryland to Maine and there should be accumulating snow all the way down into the DC metro region late tonight and on Thursday. As upper-level energy slides towards the eastern US, low pressure will develop over central Virginia later this evening. This low pressure area will then intensify as it heads northeastward reaching the waters off of the New Jersey coastline by early tomorrow. From there, the storm will trek just east of the New England coastline spreading accumulating snow all the way up to the eastern seaboard of Maine.
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The threat for a major snowstorm has increased for the region from Philly to Boston and accumulating snow is likely all the way down to the DC metro region late tonight and on Thursday. The overall weather pattern will be very active over the next 36 hours ranging from today's warmth to significant accumulating snow. It’ll be well above normal today in the entire Mid-Atlantic region ahead of a strong cold frontal system and there may be a shower or two to go along with the warmth. Colder air will then push into the region this evening at the same time low pressure rapidly develops in the eastern US. Rain is likely for awhile tonight, but then as colder air moves in, a changeover to snow will take place towards morning from northwest-to-southeast. There may be some sleet involved during the changeover period of rain-to-snow. By early tomorrow, intensifying low pressure will be just off the Mid-Atlantic coastline and the snow will likely fall heavily at times. When all is said and done, this is likely to be the heaviest snowfall this season in many areas along the I-95 corridor with 5-10 inches on the table for the NYC metro region. This storm will head all the way up along the coastline dumping accumulating snow on eastern New England as well. One final note, the snow will likely be of the heavy, wet variety and can cling to trees and bushes raising the possibility for downed limbs and power outages.
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The chance for an all-out snowstorm from Philly to Boston is growing and accumulating snow is likely to extend all the way into the DC metro region. Upper-level energy is looking more and more impressive out in the northwestern US and this will act as a catalyst to form low pressure near the Mid-Atlantic region later tomorrow. Colder air will push in tomorrow night and rain or a wintry mix during the first half of Wednesday night is likely going to change to snow from after midnight from northwest-to-southeast. The snow is likely to fall heavily at times early Thursday and accumulate quite rapidly and then taper off during the early-to-mid afternoon. Travel is quite likely going to be impacted greatly on Thursday; especially, for the morning commute. Accumulations of 6 inches or more are on the table for the Philly and NYC metro regions and this threat could extend closer to the DC metro region if current trends continue.
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The threat for a snowstorm is increasing from Philly to Boston and accumulating snow is likely down to the DC metro region. The weather pattern will be very active in the I-95 corridor over the next 48 hours ranging dramatically from near record warmth in some spots to accumulating snow. It’ll be much warmer today in the southern Mid-Atlantic region and those unusually warm conditions will extend on Wednesday into the rest of the Mid-Atlantic region and there will be some shower activity to go along with the warm up. Colder air will then push into the region tomorrow evening at the same time low pressure forms in the Mid-Atlantic region. Rain is likely for awhile tomorrow night, but then as colder air moves in a changeover to snow will take place from northwest-to-southeast. By early Thursday morning, intensifying low pressure will be just off the Mid-Atlantic coastline and the snow could be falling heavily; especially, in places north of the PA/MD border. When all is said and done, this is likely to be the heaviest snowfall this season in many areas north of the PA/MD border with several inches of snow on the table. This storm will likely head all the way up along the coastline dumping accumulating snow on eastern New England as well.
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The weather pattern will be very active in the I-95 corridor over the next few days ranging from rain and high temperatures well up in the 50's around here to the potential for accumulating snow. It’ll turn much warmer for today and Wednesday and the warm up will be accompanied by occasional rainfall. Colder air will then push into the region tomorrow night and this temperature transition is likely to result in a period of rain changing to accumulating snow. Travel is likely to be impacted Thursday morning and several inches of accumulation are on the table from this upcoming event.
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The weather pattern will be very active in the I-95 corridor over the next few days ranging wildly from rain and high temperatures in the 60’s to the potential for some accumulating snow. It’ll turn much warmer on Tuesday and Wednesday in the DC-to-Philly-to-NYC corridor and the warm up will be accompanied by some rainfall. Colder air will then push into the region late Wednesday night and early Thursday and this temperature transition may result in a period of rain changing to accumulating snow. The greatest chance for accumulating snow late Wednesday night and early Thursday in the I-95 corridor will be in the northern and western suburbs and likely to the north of the Pennsylvania/Maryland border.
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Quite an active few days is in store for the Mid-Atlantic region and it is within the realm of possibility that the NYC metro region transitions from highs in the 50's on Wednesday to accumulating snow by early Thursday. Temperatures will take quite a swing over the next few days with a big upswing later tomorrow and Wednesday and then a sharp drop off on Thursday. A warm front will generate some rain late tonight and Tuesday and then a cold front will produce showers and windy conditions on Wednesday. Winds will remain pretty strong on Wednesday night and Thursday as colder air floods into the region from our northwest. In addition to the change back to cold, it is likely that a storm forms along the frontal boundary zone and heads towards the Mid-Atlantic coastal waters late Wednesday night and early Thursday morning and this could result in some accumulating snow for the I-95 corridor region; especially, to the N and W of the big cities.
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The next couple of days will be quite cold in the Mid-Atlantic region and well below normal for this time of year. A weak area of low pressure will arrive on Sunday and it could generate a couple of snow and/or rain showers in the region, but nothing significant. A more important system will arrive for the Tuesday/Wednesday time frame and it will feature a decent amount of precipitation for the entire Mid-Atlantic region. Odds favor primarily rain for this event; however, there could be enough cold air at the onset for some frozen precipitation to be involved late Monday night or early Tuesday morning. After a mild and wet Wednesday, much colder air will sweep into the region for the latter part of next week.
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