Weak low pressure will push across the Mid-Atlantic region today and result in a relatively minor snow event and primarily to the south of the PA/MD border. Clouds will rapidly increase this morning and snow should break out in the mid-to-late afternoon hours and continue into early tonight. Small accumulations of a coating to an inch or so are possible from this system in the southern and western suburbs, but roads should hold up pretty well given the borderline afternoon temperatures and daytime snowfall. After a dry day on Saturday, a more important system with more moisture will push rain into our region later tomorrow evening and it could start as a wintry mix in the normally colder higher elevation suburban locations. The rain will end early on Sunday and afternoon temperatures could end up not far from the 60 degree mark with breezy and mainly cloudy conditions. A strong cold frontal passage will usher in colder air on Monday and it'll stay moderately cold on Tuesday and Wednesday. Elsewhere, another major snowstorm will take place this weekend in the Northern Plains and there will likely be another severe weather outbreak on Saturday across the Lower Mississippi Valley including possible tornadic activity.
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Arctic cold continues to have a grip on the Mid-Atlantic region and weak low pressure on Friday is likely to result in a mainly snow event for most areas and small accumulations are possible. Snow is likely to break out on Friday during the mid-day or early afternoon hours in the DC metro region and the early-to-mid afternoon hours in Philly as low pressure pushes towards the North Carolina/Virginia coastline. The NYC metro region may escape with little, if any, snowfall from this weak system on Friday. A more important storm with more available moisture will generate precipitation in the Mid-Atlantic region late Saturday evening and it can be just cold enough at the onset in areas north of the PA/MD border for a period of freezing rain, sleet and/or snow before an ultimate changeover to plain rain. This same system will produce a major snowstorm in the Northern Plains on Saturday and possibly another severe weather outbreak in the Mississippi Valley. Later Sunday, temperatures can climb to 60 degrees in DC, 55 degrees in Philly, and 50 degrees in NYC ahead of a strong cold front which will usher in colder air for the early part of next week.
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Unusually cold conditions will continue today in the Mid-Atlantic region and we’ll experience another day with noticeable winds and a possible snow shower or two. After partly cloudy skies this evening, clouds will tend to increase late tonight and snow is likely to develop during the mid-day or early afternoon hours on Friday as low pressure pushes towards the North Carolina/Virginia coastline. The upper-level wave of energy that is supporting this next system will get somewhat “stretched out” over the next 24 hours, but it’ll remain potent enough to likely generate small accumulations on Friday of a coating to an inch or so; primarily, to the west of the metro region. A more important system in terms of total available moisture will head towards the Great Lakes this weekend and likely push precipitation into our area late Saturday night. While the bulk of this system will likely be in the form of rain in the I-95 corridor, there is a chance for some frozen precipitation at the onset; especially, in some of the colder suburban locations north and west of Philly. Temperatures can actually jump into the 50’s later Sunday, but it’ll then turn colder early next week following the passage of a strong cold front.
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A widespread outbreak of Arctic air continues to grip the nation and today may feel the worst in the Mid-Atlantic region as strong winds will produce wind chill values in the single digits at times. In addition to the unusual cold and wind, instability in the upper atmosphere is already generating snow shower activity in upstate Pennsylvania and New York and some of these can make it into the DC-to-Philly-to-NYC corridor later today with an isolated snow squall even possible. The next low pressure system to monitor will trek across the nation over the next 48 hours and reach the Mid-Atlantic region on Friday. Snow may break out in the I-95 corridor during the mid-day or afternoon hours on Friday and there can be some small accumulations from this system. Another system will bring mainly rain to the Mid-Atlantic region on Sunday, but it may be cold enough at the onset for sleet and/or freezing rain in some interior higher elevation locations.
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The coldest core of this most recent Arctic air outbreak has moved into the Mid-Atlantic region and Northeast US following the overnight passage of a frontal system. As a result, temperatures today will be confined to the 20’s for highs – well below normal for early March – and strong winds will generate even lower wind chill values. In addition, instability in the atmosphere could result in some snow shower activity; primarily, across northern suburbs and there may even be an isolated snow squall. The next low pressure system of note to monitor will trek across the nation over the next couple of days and it can produce some snow here on Friday. The upper-level energy supporting this system will get somewhat “stretched out” over the next couple of days, but the chance for small snow accumulations is on the table for Friday in the DC-to-Philly-to-NYC corridor. A more important system will head towards the Great Lakes this weekend and likely push rain into the region by early Sunday and there is a chance for some frozen precipitation at the onset in some nearby higher elevation locations such as east-central and NE PA.
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A widespread outbreak of Arctic air has encompassed much of the nation and it will actually get worse in the Mid-Atlantic/Northeast US before it gets any better. Record or near record low temperatures extended across much of the nation both this morning and yesterday morning and there will no doubt be more record-breaking cold over the next couple of mornings. The next threat for snow in the Mid-Atlantic region comes on Friday, but it currently does not look like a significant event.
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An Arctic air mass has flooded the eastern half of the nation and the coldest air temperatures and strongest winds will take place on Wednesday. The next low pressure system to monitor will arrive in the Mid-Atlantic region on Friday on the back end of this unusual cold spell and it could result in some snow. It’ll turn milder this weekend and an area of rain is likely to move into the eastern states on Sunday ahead of another cold frontal system.
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Strong low pressure is now heading away from the Mid-Atlantic coastline and our focus will shift from the winter storm to an influx of Arctic air which will be way below-normal for this time of year. Not only will colder-than-normal weather persist this week in the local region, but for much of the eastern 2/3rds of the nation as well. Temperatures could actually bottom out in the single digits this mid-week in many suburban locations. High pressure will build into the area on Tuesday and control the weather into the latter part of the new work week. There is the threat for more snow at week's end.
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A significant winter storm will impact the Mid-Atlantic region from this afternoon into early Monday morning. Low pressure will intensify as it takes a track towards the southeastern Virginia coastline by later tonight and then it moves quite rapidly to a position off the southern New England coastline by early Monday. Significant snow accumulations are likely in many northern and western suburbs along I-95; especially, in areas north of the PA/MD border. An Arctic air mass will flood the eastern half of the nation following the storm with way below-normal temperatures for the first full week of March.
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March has begun like a lion with cold and an active pattern and there is one more storm to deal with before an Arctic blast arrives and this storm may have the biggest impact of all. Storm #1 brought accumulating snow to much of the Mid-Atlantic region on Thursday night, storm #2 brought snow and ice to many areas on Friday night, and the next storm is likely to begin on Sunday afternoon with the most potential of all as it will be loaded with moisture. The immediate I-95 corridor region from DC-to-Philly-to-NYC is going to be the “battle zone” region with significant snow accumulations to the north and west and mainly rain to the south and east.
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