A wintry mix of sleet and/or freezing rain is likely today and tonight and there can be slick spots on untreated surfaces given the cold ground conditions. The moisture field from low pressure off the Mid-Atlantic coastline will shift away to the northeast of here on Wednesday and then low pressure will intensify near the Carolina coastline by Thursday. The precipitation from the Carolina storm should stay to the south of here on Thursday, but this system will help to pull down a very cold air mass from Canada for the end of the week and for the weekend. Another storm will threaten the Mid-Atlantic in the Sunday/Monday time frame and it has potential to have a high impact on the region.
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A wintry mess of snow, sleet, freezing rain, and plain rain is coming to the Mid-Atlantic region as low pressure heads from the south-central states to the Ohio Valley. A dense dry and cold air mass is in place across the Mid-Atlantic region and it will be reluctant to give up its ground as moisture pushes in this direction from the west-to-southwest. As a result, frozen precipitation is a good bet during this event in the entire DC-to-Philly-to-NYC corridor and the progression of the moisture field to the northeast will be quite slow. The arrival time in the DC metro region should be 4 or 5 pm and there is the threat for a burst of heavier snow by early tonight - an hour or two after the onset of the mixed precipitation. Arrival time in the Philly area is late this evening and precipitation will probably hold off until tomorrow morning for the NYC metro region.
Looking ahead, the active weather pattern will continue and another storm is going to intensify near the Carolina coastline Wednesday night/Thursday and its impact in the DC-to-Philly-to-NYC corridor is likely to be limited. Yet another storm could travel across the country this weekend and perhaps have an impact in the Mid-Atlantic region in the Sunday/Monday time frame.
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A cold, dry air mass is in place across the region as we begin a new work week, but there is plenty of moisture headed in this direction from a low pressure system moving towards the Ohio Valley. Snow or a mix of snow and ice is likely to push into the area by late tonight and it’ll continue at varying rates into late Tuesday night. Accumulations of anywhere from a coating to a couple of inches are possible during this event and, given the cold ground conditions, there can be slick spots on untreated surfaces from late tonight through late tomorrow night. Another storm will head towards the Carolinas on Thursday and its precipitation shield will likely stay to our south and east.
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A wintry mess of snow, sleet, freezing rain, and rain is coming to the Mid-Atlantic region early this week as low pressure heads from the central states to the Ohio Valley. A cold, dry air mass will still be in place on Monday morning when moisture begins to head in this direction from the west-to-southwest. This dense air mass will be reluctant to give up its ground; consequently, the northeastward progression of the precipitation along the I-95 corridor will be rather slow and some frozen precipitation is a good bet. In addition, the moisture field will tend to break apart some by the time it reaches areas to the north of the PA/MD border. Arrival time in the DC metro region is likely mid-to-late afternoon on Monday, late evening in Philly, but not until early Tuesday in NYC. A late week storm is likely to head towards the Carolina coastline with little impact likely in the DC-to-Philly-to-NYC corridor.
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A frontal passage later today will usher in a very cold, dry air mass for the weekend in the Mid-Atlantic region with highs confined to the 30’s on both days all along the I-95 corridor. This cold, dry air mass will still be in place on Monday morning when moisture begins to head in this direction from a low pressure system over the Ohio Valley. A second low pressure area will form off the Mid-Atlantic coastline by early Tuesday and the combination of these two systems will result in a wintry mess in the Mid-Atlantic region from later Monday into Tuesday.
In areas to the north of the PA/MD border, snow and/or ice are likely to be the primary precipitation types and accumulations of up to a few inches are on the table. To the south of the PA/MD border, there is likely to be a mix of ice and rain with some snow possible at times and small accumulations are possible. Another storm could impact the Mid-Atlantic region later next week; however, its northward reach is still uncertain this far in advance and it could be suppressed to the south. Looking way ahead, there can be yet another storm threat a few days later as the active weather pattern continues into the early part of February.
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The next cold front will cross the region today and it’ll usher in quite a cold air mass for the upcoming weekend with highs on Saturday and Sunday confined to the lower or middle 30’s. Low pressure is likely to pull out of the south-central states by early Monday and head towards the Tennessee Valley while a secondary system forms off the Mid-Atlantic coastline. Snow or a mix of snow and ice likely arrives here in the afternoon and continues into Tuesday with accumulations certainly on the table; especially, across the northern and western suburbs. Another system could threaten the area with snow later next week, but its northward extent is still uncertain this far out.
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Philadelphia and New York City received traces of snow early yesterday as an upper-level wave of energy passed overhead, but there has not been anything significant in terms of snow in these two metro regions - nor in the Washington, D.C. area - since the middle of December. This “snow drought” in the DC-to-Philly-to-NYC corridor may come to a rather dramatic end over the next ten days or so. One winter storm can impact the Mid-Atlantic region from later Monday into Tuesday and then a second threat exists for later next week. There have been numerous threats of snow in recent weeks for the I-95 corridor and all have fizzled out, but there is perhaps better cause for optimism this time around for snow lovers in the I-95 corridor.
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High pressure pushes into the region today following the passage of a cold front on Wednesday and it’ll remain breezy and chilly. Another cold front will cross the area on Friday and it’ll usher in a colder air mass for the weekend with highs on both weekend days confined to the lower or middle 30’s. Low pressure could bring us some snow and/or ice early next week and accumulations are on the table, but many details will have to be ironed out over the next few days on this upcoming threat.
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A strong wave of energy is now crossing over the Mid-Atlantic region and it could produce snow showers in the area and maybe even an isolated heavier snow squall. A colder air mass will pour into the region this afternoon as NW winds increase in intensity with possible gusts to 45 mph or so. It’ll become quite cold by late tonight as the new cold air mass settles into the region and it’ll remain chilly through the remainder of the work week. A reinforcing cold air mass will arrive this weekend – potentially setting the stage for wintry precipitation around here early next week.
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This likely should fall in the “Department of Redundancy Department”, but there are snow threats coming to the DC-to-Philly-to-NYC corridor in the near future. A snowstorm in the middle of December that brought accumulating snow to the I-95 corridor has been followed by lots of threats, but no actual snowfall of any significance. While there is a snow shower threat late tonight and early tomorrow, a threat for later in the week that looked promising several days ago appears to have once again fizzled as we approach potential event time. Looking ahead to next week, there are likely not one, but two opportunities for accumulating snow (and ice) in the I-95 corridor and we’ll closely monitor these threats in coming days to see if they actually come to fruition this time around and make snow lovers happy.
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