Low pressure will develop off the Southeast US coast line later today and ride northeastward over the next 24 hours to a position off the New England coast on Saturday. This system will bring some rain to the NYC metro region from later tonight into early Saturday and then gradual clearing should take place during the late afternoon hours. An Arctic front arrives on Sunday and this will have strong upper-level support with it and the result should be some snow shower activity in the region during Sunday night. Much colder air follows this next Arctic frontal passage for the early and middle parts of next week - the coldest air so far this season - and there can be a storm threat at the end of the week.
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Low pressure will push northeastward on Friday from the Southeast US and to a position off the New England coastline on Saturday. Temperatures will be warm enough for rain in the immediate I-95 corridor from tomorrow night into early Saturday before some clearing takes place late in the day. Another system will pull out of the Gulf of Mexico region on Sunday at the same time a dynamic upper-level wave of energy drops out of Canada and over the Great Lakes. It appears the southern system will not hug the coastline as it turns northeast on Sunday and our main player will be the upper-level wave to our northwest associated with another Arctic blast. As a result, snow showers will be the main threat around here for Sunday night and any steadier or heavier snow looks like it’ll be confined to areas well to our northeast.
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Temperatures will modify noticeably today compared to yesterday’s Arctic chill and it’ll stay milder to end the work week as well. Moisture from the southern states will advance our way during the day on Friday and rain is likely to break out tomorrow night and last into early Saturday. It’ll turn colder behind the early weekend system which ultimately will develop into a strong storm just off the Northeast US coastline. By Sunday, colder air will push into the Mid-Atlantic and an Arctic front with strong upper-level support could generate snow shower activity in the region.
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Now that the latest Arctic frontal system that generated the first snowflakes of the season for many of us has pushed off the east coast, attention turns to the weekend possibilities. It looks like there will be one system that affects the I-95 corridor with rain from Friday night into early Saturday, and then a second – and far less certain – system could impact the region late Sunday. The second threat carries with it a bigger concern since - if it were to reach this area late Sunday - it would encounter much colder air than the initial system and snow would likely be the result.
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In the wake of yesterday’s Arctic frontal passage, temperatures today will not even reach the freezing mark and a persistent breeze will generate even lower wind chills. Temperatures will then modify on Thursday and Friday ahead of an influx of moisture from the southern states that reaches us by the end of the week. As a result of the slight warm up later this week, rain is likely to fall early this weekend as a system forms near the Northeast US coast line, but colder air could get wrapped in later in the weekend as a second system moves from the Gulf of Mexico towards the east coast.
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An energetic Arctic front with copious upper-level support is wreaking havoc today from the Ohio Valley to central and western sections of PA and NY. Buffalo, NY just recorded thunder snow with a wind gust to 64 mph and State College, PA broke its longest snowless streak ever recorded with a coating of the white stuff earlier today. While there will be flurries and snow showers this afternoon in the I-95 corridor, the heaviest band may not arrive until early tonight. Also, much like a summertime situation, don't be surprised to see some sunshine break out later this afternoon just ahead of the main squall line band of precipitation. A high-resolution computer forecast model (HRRR) is indicating that an impressive band of precipitation will arrive in the DC-to-Philly-to-NYC corridor approximately between 5 and 9PM (5-6pm DC, 7pm Philly, 8-9pm NYC). This band can be mixed with or even start as rain, but should end up producing snow and perhaps even a burst of heavier, wind-blown snow with small accumulations. Winds will also get quite gusty this afternoon and early tonight with 50 mph gusts possible in much of the Mid-Atlantic region. Following the frontal passage, reinforcing Arctic air will grip the area on Wednesday holding temperatures generally to the 20’s for highs.
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An energetic Arctic front arrives in the I-95 corridor later today featuring lots of upper-level support. Snow or rain showers are likely to develop around here during the afternoon hours and then snow showers should fall during the early evening - perhaps even a burst of heavier snow in some spots with a minor accumulation. Reinforcing Arctic air pours into the region tonight on gusty winds - perhaps to 50 mph - and Wednesday will see temperatures struggle to reach the 30 degree mark, but they will then modify later in the week. By the weekend, moisture is likely to push to the northeastern US from the Deep South and this will bring about a chance for rain (at least initially) in the I-95 corridor.
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An active weather pattern is setting up for the Mid-Atlantic region which will feature an energetic Arctic frontal passage later tomorrow and then a weekend storm threat. It is quite certain that the frontal passage later tomorrow and early tomorrow night will generate the first snowflakes of the season for much of the I-95 corridor, but the weekend system is far from being clear as to its impact on the region and requires more time for clarification.
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An active weather pattern is setting up for the Mid-Atlantic region with the combination of high-latitude blocking and an energetic southern branch of the jet stream. The first snowflakes of the season are likely later tomorrow and early tomorrow night as an Arctic front slides through the area. This front will have lots of upper-level support and it can even generate a small accumulation in parts of the NYC metro region by early Wednesday. The second half of the week will feature generally cold and dry conditions. By the weekend, moisture is likely to push to the northeastern US from the Deep South and this will bring about a chance for rain in the I-95 corridor.
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Moisture has pushed in our direction from the southern states and there will be some light rain or drizzle at times from today and shower activity later tonight and Saturday. A second and more important system is likely to throw steadier and heavier rain our way from tomorrow night into early Sunday and this system will be followed by another Arctic air mass for the early part of next week. A reinforcing second blast of Arctic air will arrive here by Tuesday night. This secondary Arctic outbreak will have plenty of upper-level support which could result in snow showers around here Tuesday night and early Wednesday - perhaps even a heavier snow squall. This active frontal passage could even have an impact on the early Wednesday commute.
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