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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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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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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A high impact weather event is unfolding for much of the eastern US with accumulating snow to be followed by extreme cold and dangerous sub-zero wind chills. A powerful storm over the western Atlantic Ocean will deepen explosively during the next 24-36 hours as it moves generally northward from off the Florida coastline today to just east of Maine by tomorrow night. This storm will develop hurricane-like strength by tomorrow night when its central pressure could bottom out near 28.14 inches (953 millibars) – this is on the same level as category 3 (major) hurricanes. Extremely cold air will pour into the eastern US on the heels of this ocean storm and given its intense pressure gradient, winds will strengthen significantly on Thursday night and Friday. The combination of wind gusts past 40 mph and the extremely cold temperatures will generate dangerous sub-zero wind chill values for an extended period of time from Thursday night to Saturday night. After that, some moderation in temperatures should arrive early next week, but that temporary “warmup” may be accompanied by some wintry precipitation.
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The bitter cold weather pattern of the past couple of weeks for the eastern two-thirds of the nation will not ease up at all this week and an added feature will be a powerful storm that develops over the western Atlantic Ocean. This storm is likely to generate ice and accumulating snow from Florida to New England over the next couple of days and accumulating snow can fall all the way back to the immediate I-95 corridor region between DC and Philly. Temperatures today will stay below freezing across about 80% of the nation and record lows have been set this morning in dozens of locations repeating a similar performance of yesterday morning. Perhaps even more important than any snow that falls from this upcoming storm will be the extreme cold that follows in the eastern US during the Thursday night to Saturday time period. Wind chills will reach dangerous sub-zero levels as winds gust to 50 mph or so in this late week time period and power outages are a concern. A relaxation in temperatures is likely to arrive in the Mid-Atlantic region by early next week, but there may be a wintry mix of rain, sleet and/or snow to accompany that “warm up”.
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Arctic cold will be relentless and punishing for much of the nation for several days to come and many areas will be experience some of the coldest weather in decades to begin a new year. In fact, the three week stretch from around December 20th to January 10th could be one of the coldest stretches we’ve had across much of the nation in a long, long time. A clipper system will drop southeastward and into the DC-to-Philly-to-NYC corridor on Saturday – likely with accumulating snow on the order of a dusting to an inch or two – and it will usher in the coldest Arctic air mass so far in this cold wave for the Sunday, Monday, and Tuesday time period. Indeed, average temperatures in the eastern two-thirds of the nation may be the coldest ever to start a new year in about 70 years of record keeping.
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Arctic cold will be relentless and punishing for much of the nation for several days to come and many areas will be experience some of the coldest weather in decades to begin a new year. In fact, the three week stretch from around December 20th to January 10th could be one of the coldest stretches we’ve had across much of the nation in a long, long time. A "clipper" system will drop southeastward and into the Mid-Atlantic region by Saturday – likely with some accumulating snow on the order of a dusting to an inch or two – and it will usher in brutally cold Arctic air for the Sunday, Monday, and Tuesday time period. Indeed, it will be frigid on New Year’s Eve at Times Square in New York City, for all activities on the National Mall in Washington, DC and it will be brutal for the Mummer’s Parade in Philly on Monday. Looking ahead, there may be a snow threat coming to the east coast during the middle or latter part of next week, but it is too early to say if this potential system develops close to the coast or too far off the coast.
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The weather pattern across the nation will become quite wild over the next couple of weeks with widespread bitter cold and multiple snow threats. After a mild and wet day on Saturday in the Mid-Atlantic region, a strong cold front will pass through the region and not only usher in a colder air mass, but begin a pattern change to more sustained cold. In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around going well into the month of January. In addition to the upcoming cold, there are multiple snow threats going forward including a relatively minor one for the Mid-Atlantic region on Sunday night/early Monday and then a much bigger threat at the end of next week which could be followed by bitter cold air.
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The weather pattern across the nation will become quite wild over the next couple of weeks with widespread bitter cold and multiple snow threats. After a mild and wet day on Saturday in the Mid-Atlantic, a strong cold front will pass through the region and usher in a colder air mass for Christmas Eve (Sunday). In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around going well into the month of January. In addition to the upcoming cold, there are likely to be multiple snow threats going forward including one for the Mid-Atlantic and Northeast US on Sunday night and early Monday (Christmas Day) and then another possible accumulating snow threat at the end of next week.
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After a mild and wet day on Saturday, a strong cold front will pass through the region and usher in a colder air mass for Christmas Eve (Sunday) and Christmas Day (Monday). In fact, it looks like once this colder pattern sets up in the Mid-Atlantic region, it’ll stick around for the next couple of weeks. Low pressure is likely to form near the coast late this weekend as the colder air filters into the I-95 corridor and this could generate more rain which could change to snow before ending; especially, in the northern Mid-Atlantic and Northeast US. Looking ahead and still in the "speculation" phase, there may be a nice setup at the end of next week for snow in the region.
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