The overall weather pattern from tonight through the middle of next week will be quite volatile with a wild swing in temperatures of about 50 degrees from today’s highs in the lower 60's to early Sunday morning lows in the low-to-mid teens. This late week "January thaw" will result in heavy rain for the I-95 corridor and thunderstorms could even get mixed into the picture as well as some patchy fog. As Arctic cold arrives in the big cities tomorrow morning, the precipitation could mix with or change to ice and/or snow before ending. Then, after a couple of dry and quite cold days, accumulating snow may threaten the I-95 corridor from later Tuesday into Wednesday as a reinforcing Arctic blast arrives in the eastern US
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The overall weather pattern from tonight through the middle of next week will be quite volatile with wild swings in temperatures from the 60’s on Friday afternoon to Arctic cold for this weekend and much of next week. This late week "January thaw" will also result in heavy rain for the I-95 corridor and thunderstorms could even get mixed into the picture as well as some patchy fog. As Arctic cold arrives in the big cities on Saturday morning, the precipitation could mix with or change to ice and/or snow before ending by mid-day. Then, after a couple of dry and quite cold days, accumulating snow may threaten the I-95 corridor from later Tuesday into Wednesday as a reinforcing Arctic blast arrives in the eastern US.
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A strong cold front will approach the region on Friday and a strong storm will form along the advancing frontal boundary zone in the Ohio Valley. Ahead of the front, our temperatures should climb into the 50's this afternoon and then into the 60’s around here on Friday. Many parts of the Ohio Valley are likely to receive significant snow and ice from this storm that will slide just to our northwest late Friday night. Soaking rain will accompany this late week warm up in the I-95 corridor and it looks like the rain will tend to be concentrated in two separate time periods: later tonight/early Friday and tomorrow night/early Saturday. After the front passes through the region early Saturday, the precipitation will wind down – perhaps mixing with or changing to sleet and/or snow before ending; especially, in the northern and western suburbs. In fact, accumulating snow is likely early Saturday across northeastern PA and upstate NY as the Arctic air arrives. By Sunday, Arctic air will be fully in control and our temperatures will struggle to reach the 30 degree mark for highs. It’ll stay quite cold through the early part of next week and accumulating snow is possible by later Tuesday or Wednesday as a reinforcing shot of Arctic air arrives in the eastern US.
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For the first time in quite awhile, temperatures climbed well above freezing on Tuesday and actually made it all the way into the 40’s throughout the DC metro region. A cold frontal system, however, passed through in the overnight hours and has ushered in slightly colder air for today and highs are likely to be confined to near 40 degrees. However, a noticeable warm up is coming for the next couple of days with 50 degrees possible for highs on Thursday afternoon and then we may make a run at the mid-to-upper 50's on Friday. The warm up will come with some occasional rainfall, however, and some of it will be heavy at times. The rain looks like it will tend to be concentrated in two separate time periods: Thursday night and Friday night. Colder air arrives on Saturday and temperatures by Sunday will struggle to reach the 30 degree mark.
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Temperatures should actually climb to the 40 degree mark for highs later today which will mark the first time above freezing in quite awhile. A frontal passage tonight will usher in colder air for tomorrow, but then we’ll turn quite mild for the Thursday, Friday, Saturday time period. Temperatures will climb into the 50’s during this late week warm up, but there will be occasional rain to accompany the milder conditions. A strong cold front will put an end to the warm up by the latter part of the weekend and it’ll stay cold through the early part of next week.
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The ground is very cold and there is some precipitation closing in on the DC-to-Philly corridor – not a great combination for the late day commute. A mix of freezing rain and sleet is likely to reach the DC metro region before 1 PM or so and a mix of snow, sleet and/or freezing rain is likely to reach the Philly metro region before 2 PM or so.
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After a bitter cold weekend, temperatures will modify today, but that modification will likely come with some snow possibly mixed with sleet at times. Road conditions could quickly deteriorate for the late day commute with any precipitation as ground-level temperatures have been so cold for so long. It’ll turn a bit milder on Tuesday, but then a colder air mass will return briefly for the mid-week time period. It should turn milder again for a few days late in the week (Thursday-Saturday) before another cold air mass makes it into the Mid-Atlantic region at the end of the weekend. The late week warm up is going to be accompanied with occasional rain.
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The stretch of weather that began just before Christmas Day has been very cold relative-to-normal for much of the eastern two-thirds of the country and it may reach a nadir this weekend. Temperatures during the next couple of mornings in the DC-to-Philly-to-NYC corridor should rather easily drop to single digits and some spots will likely reach zero or even sub-zero conditions. Each morning this week has featured numerous record-low temperatures in the Northeast US, Midwest and Mid-Atlantic regions and that pattern should continue tomorrow morning and perhaps become even more widespread early Sunday morning. It’ll stay very cold on Sunday, but less painful than Saturday as temperatures will climb a bit and winds will drop off in intensity and then there will be more modification on Monday with many areas attempting to climb above freezing for the first time in many days. More significant warming in the I-95 corridor is likely late next week for a few days and then an even greater and more widespread “January thaw” is possible later this month.
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On the heels of yesterday’s intense storm, winds will continue to be quite strong and a frigid Arctic air mass has overspread the Mid-Atlantic region. Temperatures both today and Saturday will have a tough time climbing to the teens for highs and overnight lows for the next couple of early mornings will not be far from zero. The temperatures will moderate on Monday following another very cold day to end the weekend, but the “warm up” may be accompanied by a light wintry mix of ice, rain and/or snow.
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A high impact weather event continues for much of the eastern US with bands of accumulating snow soon to be followed by extreme cold and dangerous sub-zero wind chills. This storm now ranks as one of the most intense east coast winter storms ever in terms of how fast and how much it has intensified while moving over the relatively warm waters of the western Atlantic Ocean (i.e., Gulf Stream). In fact, the central pressure dropped 54 millibars in a 24-hour period reaching major hurricane-like strength (category 3) by 7AM of 954 millibars (28.17) and it is unleashing hurricane-force winds along coastal sections of New Jersey to New England. Heavy snow bands rotating around the storm will continue for the few hours in the Mid-Atlantic region, but by later today, the powerful winds will become the main factor and then the extreme cold.
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