The brunt of this major storm will take place between now and midnight or so although damaging wind gusts can last to the wee hours of the morning in and around the NYC metro region. Very strong high pressure in southeastern Canada is combining with a powerful storm to produce a tightening pressure gradient in the Mid-Atlantic region. This will result in potentially damaging wind gusts to 60 mph in interior locations over the next 12 hours or so and to near hurricane force at or just off the Mid-Atlantic coastline. In addition to the powerful winds, rain will become more widespread later today and fall heavily at times through the overnight hours before winding down early tomorrow. There is also a decent shot that some ice or snow mixes in with the rain all the way into the northern and western suburbs of the big cities along the I-95 corridor later today or tonight.
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Very strong high pressure in southeastern Canada is combining with an intensifying major storm system over the Tennessee Valley to produce a tightening pressure gradient in the Mid-Atlantic region. This will result in potentially damaging wind gusts past 65 mph along coastal sections of the Mid-Atlantic region (i.e., NJ, NY, Delaware) and up to 50 mph across inland locations. In fact, hurricane force winds are possible over the open waters just off of areas like Long Island, NY, NE NJ during the brunt of this storm later today into tonight. In addition to the powerful winds, rain will become more widespread later today and fall heavily at times through the overnight hours. As colder air wraps into the system later today and tonight, the rain can mix with sleet or snow across the northern and western suburbs.
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Very strong high pressure in southeastern Canada will combine with an intensifying major storm system over the next 24-36 hours to produce a tightening pressure gradient in the Mid-Atlantic region. This is likely to result in potentially damaging wind gusts past 60 mph along coastal sections of the Mid-Atlantic region (i.e., NJ, NY, Delaware) and up to 50 mph across inland locations. In fact, hurricane force winds are possible over the open waters just off the coast of areas like Long Island, NY during the brunt of this storm. In addition to the powerful winds, rain will last from today right into Tuesday and will come down heavily at times. The brunt of this storm looks to be on Monday and Monday night with the combination of the strongest winds and heaviest rainfall.
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Our active weather pattern will continue over the next several days and the result will be a lot of rainfall around here. Moisture from the southern states will produce some rain in the area from this afternoon into early tonight and then there is the likelihood for a major rain event early next week along with strong winds. Low pressure will strengthen near the Mid-Atlantic coastline early next week and only move slowly up the eastern seaboard. In fact, this system is likely to come in two parts with the first system spreading rain into the area from Sunday into Monday and then a second and stronger system will push more rain here for later Monday into early Tuesday. The second system will see an influx of colder air wrapping into it and the rain can change to accumulating snow in the higher elevations of interior Northeast US. There is even an outside chance that the rain changes briefly to snow around here late Monday night or early Tuesday before ending as the overall system finally pulls away to our northeast. A more sustained colder weather pattern begins in the eastern US later next week.
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Today is going to be the nicest weather day of the week with high pressure edging into the region, but the dry weather won’t last too long. Moisture from the southern states will produce some rain in the area later tomorrow into tomorrow night and then there is potential for a major rain event early next week. Low pressure will strengthen near the Mid-Atlantic coastline early next week and only move slowly up the eastern seaboard. This will likely result in significant rainfall for the I-95 corridor from late Sunday into early Tuesday. A colder weather pattern returns to the eastern US later next week.
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Low pressure will slowly push away from the Northeast US coastline today and high pressure will build in for tonight and Thursday. The return to dry weather on Thursday, however, will not last too long as moisture will head our way from the Deep South on Friday and likely result in shower activity around here during the PM hours. High pressure will try to build into the region this weekend, but more moisture from the Deep South will head our way for late Sunday and Monday. In fact, this system heading our way for the Sunday night/Monday time period could turn out to be a significant rain maker for the entire I-95 corridor. Looking ahead beyond this "January thaw" several day stretch, a colder weather pattern is likely to return to the eastern US by the end of next week.
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Low pressure will head from the Great Lakes region today to the Northeast US coastline and it will generate some rainfall for the region. Showers can continue on Wednesday morning as well, but Thursday should be on the dry side. Another system is likely to produce some rain around here by Friday night and the weekend will remain a little bit on the unsettled side as high pressure to our north tries to take control. There is the chance for a significant rain event during the early part of next week.
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The week will start on the chilly side, but a warm frontal passage on Tuesday will pave the way for somewhat milder conditions during the second half of the week. There is the chance for some rain on Tuesday as the frontal system works its way through the region. High pressure will settle over the area later in the week and it’ll stay primarily on the dry side unti late Friday when showers can return from our southwest.
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Temperatures are starting the day generally below freezing in the Philly and NYC metro regions and they won’t climb much at all today as low-level Arctic air is now firmly entrenched in the area. Precipitation should arrive in these metro regions somewhere around the noon or 1pm time frame moving from southwest-to-northeast and it should continue on and off into the evening; primarily, as a mix of snow and sleet. Freezing rain can mix in at times; especially, late in the day and during the evening, but snow and sleet should dominate for much of the afternoon. Anywhere from a coating to an inch snow is possible this afternoon and evening across eastern PA, interior NJ, and the NYC metro region. There can also be a touch of icing left on the ground and also on untreated surfaces. Travel conditions can get slippery this afternoon and evening on any untreated road surfaces and bridges. The precipitation winds down during the late evening hours.
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An Arctic cold frontal has passed through the region and there will be big changes in temperatures today compared to yesterday. The record warmth of yesterday is gone and N-NW winds will keep temperatures nearly steady today in the lower 40’s despite plenty of sunshine. Strong Arctic high pressure will build to our north and this same cold frontal system will stall out to the south of here by tomorrow. A disturbance will ride along the frontal boundary zone on Saturday spreading some precipitation into the Mid-Atlantic region, but we’ll be on the northern edge. As a result, some light snow is possible later tomorrow into tomorrow night, but any accumulation should be on the small side. Looking ahead, much milder weather will return by the middle of next week.
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