The main weather event this week will be the passage of a strong cold front late Thursday night that will usher in a cold air mass for Christmas Day (Friday). This strong front will be preceded by heavy rain from later Thursday into Thursday night and it’ll turn quite mild on Christmas Eve with late day temperatures flirting with the 60 degree mark in the DC-to-Philly-to-NYC corridor. Winds will become an important factor as well later on Thursday and Thursday night with gusts past 40 mph possible and there can be a thunderstorm mixed in. On the backside of the front, temperatures will drop quickly early Friday, any standing water will freeze, and there can be a brief period of snow and/or sleet after the heavy rain event. The much colder air that arrives on Friday will stick around into the upcoming weekend and temperatures on Saturday will struggle to pass the 30 degree mark for highs.
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An active weather pattern continues this week in the central and eastern US with the main weather event being the late week passage of a powerful Arctic cold frontal system. This front will result in a heavy rain event for the Mid-Atlantic/NE US from late Thursday into Thursday night which will be accompanied by strong winds, mild conditions and a possible thunderstorm. With snow cover still in place in many areas north of the PA/MD border, the upcoming heavy rain event may lead to localized flooding conditions.
Behind the front, temperatures will drop sharply potentially leading to a quick ice-up in some spots and inland areas from West Virginia to central/western NY will likely see accumulating snow. In fact, there can even be some small accumulations of snow early Friday in the I-95 corridor on the heels of the frontal passage; especially, in some of the northern and western suburbs. The much colder air that arrives on Christmas Day (Friday) will stick around into the upcoming weekend and next week promises to be quite energetic with the potential of multiple storm threats to monitor.
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An active weather pattern will continue this week with a wave of energy in the Mid-Atlantic region coming our way this evening and the arrival of a powerful Arctic cold front on Thursday night. The early week upper-level wave of energy can set off some rain and/or snow shower activity tonight and unfortunately, it'll likely prevent a view of the "great conjunction" of Jupiter and Saturn. The late week Arctic front is likely to feature milder and windy conditions on its front side in this area along with periods of rain, some of which can be heavy at times. Following the passage of the strong cold front, it’ll turn much colder on Friday and there can be a snow shower or two along with stiff NW winds.
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The first major winter storm of the season for the Mid-Atlantic/Northeast US has just passed and the overall weather pattern is likely to remain quite volatile through the remainder of the month. There will be numerous strong waves of energy in coming days that will head into the eastern states. In addition, all signs point to a continuation of cold air outbreaks for the central and eastern US over the next couple of weeks. In fact, perhaps the coldest air mass of the season so far could push into the central US by the middle of next week and arrive in the eastern states by Christmas Day (Friday). There is also a chance that heavy rain and accumulating snow will accompany the arrival of the cold blast late next week in the Mid-Atlantic/Northeast US.
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High pressure will build over the region today and stay in control into the weekend. Despite some afternoon sunshine, temperatures will end the week at well below-normal levels for this time of year. In fact, temperatures later tonight are likely to drop to the lowest levels of the year so far with partly cloudy skies, snow cover and late night lows likely in the lower or middle teens in some spots. A weak disturbance can cause a couple of showers of rain and/or snow on Sunday and a volatile weather pattern will continue next week and a cold blast may arrive by Christmas Day (Friday).
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The first major winter storm of the season for the Mid-Atlantic/Northeast US is winding down today and there will be lots of cold air in its wake. In fact, the next several days are likely to remain colder-than-normal in the eastern US and there are increasing signs for a significant cold blast late next week – just in time for Christmas Day. In addition to the threat for more cold weather, it looks like volatile weather will continue next week and beyond with several impressive waves of energy to monitor that will be heading into the eastern states.
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The first major winter storm of the season in the Mid-Atlantic region will pull away today and sunshine is going to return to the area. It will, however, stay quite cold and windy in the wake of the storm and overnight lows during the next couple of nights will be in the teens. High pressure will remain in control of our weather through the upcoming weekend. Looking ahead, signs point to quite a cold blast late next week into the central and eastern US – just in time for Christmas Day.
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A high impact winter storm is getting underway in the Mid-Atlantic region and it will push into the Northeast US later today and continue into early Thursday. Sleet will become a big player in the DC-to-Philly corridor with freezing rain in the mix as well and this will limit total snowfall accumulation amounts. This storm will be primarily a snow event across upstate PA, interior upstate NJ, NY and New England and rain will dominate from southern NJ-to- the southern half of the Delmarva Peninsula-to-southeastern Virginia. Travel conditions will become quite difficult for the Wednesday PM and Thursday AM commutes from this major winter storm.
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Very strong and cold high pressure is anchored across southeastern Canada this morning and the day will begin cold and dry. Meanwhile, low pressure will be developing today along the Carolina coastline and then push northward to southeastern Virginia and then to the Delmarva Peninsula by early tonight. After that, the low will make a bit of a turn and push more to the northeast instead of to the north resulting in a position east of New Jersey by the late night hours. Snow is likely to break out during the early-to-mid afternoon hours and given the expected storm track, enough milder air will push in from the ocean to cause a mixing with or a changeover to sleet. Later tonight as the low shifts to the east, colder air should wrap around and cause a change back to all snow before the precipitation winds down early Thursday. The mixed precipitation will limit somewhat the total snow accumulations during this storm likely to the 4-8 inch range in Philly and 6-12 inch range in the northern and western suburbs. There can also be a buildup of ice in some areas later today with the expected extended period of sleet - low-level temperatures will be hard pressed to rise above freezing. One last note, watch for "mesoscale" banding during this storm which could result in heavy bursts of snow and/or sleet and possible "thunder snow" or "thunder sleet".
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A high impact storm is coming to the Mid-Atlantic/Northeast US at mid-week with significant snow for some, ice and rain for others and winds will become a big factor as well. The big cities along the DC-to-Philly-to-NYC corridor will have accumulating snow as well as a period of mixed precipitation and the heaviest snowfall amounts will be on the northwest side of the I-95 corridor. Rain will dominate in areas from coastal southern New Jersey to the southern half of the Delmarva Peninsula to southeastern Virginia.
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