Low pressure continues to strengthen at mid-day off the Mid-Atlantic coastline and the snow from this system will continue well into the evening hours along the I-95 corridor. As upper-level support moves into the region with frontogenesis aloft, heavier snow bands of up to two inches per hour will form for the PM hours and they are already appearing on the latest radar loop across southeastern NJ and over the Delmarva Peninsula. These will rotate to the northwest and produce heavy snowfall for such places as western NJ and eastern PA over the next several hours. There can even be an isolated report of “thunder snow” in some of this region.
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A major coastal storm will produce significant snow accumulations today in the I-95 corridor all the way from DC-to-NYC with the NYC metro region likely in the 8-14 inch range and locally higher amounts are possible. In addition to the snow, winds will intensify as low pressure off the Mid-Atlantic coastline strengthens and the combination of strong winds gusts and heavy snow raises the prospects for power outages. Winds can gust to 40 mph at inland locations during the brunt of the storm and to 50 mph at coastal sections of NJ and Long Island. Later today, mesoscale snow bands may form which can produce 2-3 inches of snow per hour and there is the chance for some “thunder snow” as well. As with many March snowstorms, elevation is likely to play a critical role with the difference of a couple degrees from lower spots potentially making a noticeable difference in total snowfall accumulations. The snow will wind down this evening, but the winds will stay strong right through the night.
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Spring will begin with a major coastal storm that will have a significant impact on the I-95 corridor region from DC-to-Philly-to-NYC. Spring officially begins early this afternoon and the weather will be anything but spring-like in the Mid-Atlantic region. Strong, cold high pressure from southeastern Canada has built into the Northeast US and this will be a key player and a cold air source for the Mid-Atlantic region during the upcoming long-lasting and significant weather event. This will be a two-part storm system with an initial wave of low pressure bringing mixed precipitation today and tonight into the I-95 corridor and then a second and stronger storm will form off of the Virginia Capes early tomorrow. It is this system that will generate significant snow accumulations for the DC-to-Philly-to-NYC corridor where more than a foot can pile up by tomorrow night in some sections.
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Spring officially begins today and the weather will be anything but spring-like in the Mid-Atlantic region. Strong, cold high pressure from southeastern Canada will build into the Northeast US over the next 24 hours and this will be a key player and an important cold air source for the Mid-Atlantic region during the upcoming long-lasting and significant weather event. This upcoming event will, in fact, be kind of a "two-parter" with the first system likely to bring a mixed bag of snow, sleet and/or freezing rain today into tonight and there can be an ice build-up on some surfaces. The second and stronger system comes late tonight and Wednesday and this is likely to develop into an all-out snowstorm for the DC-to-Philly-to-NYC-to-Boston corridor with significant snowfall here on the order of a 8-14 inches by tomorrow night. Snow accumulations later today and tonight will be limited due to the expected mixed variety of the precipitation.In addition, there will be increasing NE winds adding to the threat of power outages and perhaps even possible isolated "thunder snow" during this event with very heavy snow rates possible later tomorrow.
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Spring officially begins on Tuesday and the weather will be anything but spring-like in the Mid-Atlantic region. Strong, cold high pressure from southeastern Canada will build into the Northeast US over the next 24 hours and this will be a key player and an important cold air source for the Mid-Atlantic region during the upcoming long-lasting and significant weather event. This upcoming event will, in fact, be kind of a "two-parter" with the first system likely to bring a mixed bag of sleet, snow and/or rain on Tuesday and this could include an extended period of icing. The second and very likely stronger system comes Tuesday night and Wednesday and this could develop into an all-out snowstorm for the DC-to-Philly-to-NYC-to-Boston corridor with significant snow on the order of a foot or more possible in much of that region. In addition, there will be increasing NE winds adding to the threat of power outages and perhaps even possible isolated "thunder snow".
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Strong, cold high pressure from southeastern Canada will edge into the Northeast US today and will become a source of cold air over the next few days as a complex area of low pressure heads towards the region. In fact, it is looking like two separate low pressure systems may form over the next couple of days and there are forecasting complexities associated with each system. The first system is likely to generate precipitation on Tuesday and while there can be some accumulating snow, this event is likely to feature a mixture of snow, sleet and rain. The second system is likely to become the stronger of the two and take place in an overall colder environment with mainly snow later tomorrow night and Wednesday. The northern extent of this storm still has some questions, but this one could become an all-out major snowstorm in our area with increasing winds. Stay tuned.
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Strong, cold high pressure from southeastern Canada will edge into the Northeast US today and will become a source of cold air over the next few days as a complex area of low pressure heads towards the region. In fact, it is looking like two separate low pressure systems may form over the next couple of days and there are forecasting complexities associated with each system, but significant accumulating snow is definitely on the table in the DC-to-Philly corridor and this threat could certainly expand north into the NYC metro region.
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A great blizzard took place in the Mid-Atlantic region from March 18-21, 1958 with a focus on Pennsylvania where extreme snowfall amounts took place and there was a snowstorm from April 6-7 in 1982 which delayed the opening of the baseball season by several days…the point is, there can be significant snow events at the end of the winter season and even into the early part of spring. A significant storm threat continues for next week in the Mid-Atlantic region and it could be a long-lasting event with the potential for important rain, ice and/or snow amounts in DC-to-Philly corridor. The cold and stormy weather pattern that we are experiencing looks like it will continue right into early April this year.
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The week will end on a cold note as a secondary surge of cold air arrives with scattered morning snow showers and then weak low pressure should pass by just to our south on Saturday bringing us the chance for a rain and/or snow shower. High pressure builds back into the region on Sunday and it should be a precipitation-free day. Low pressure in the middle of the country early next week will trek towards the Ohio Valley and it ultimately is likely to reform near the Mid-Atlantic coastline and become a slow-moving coastal storm. As a result, there is the threat for significant rain, ice and/or snow in the extended period from late Monday night into perhaps early Thursday.
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March is known to feature some crazy and surprising weather and the 1958 blizzard that occurred in the Mid-Atlantic region between March 18th and 23rd was indeed rather unexpected. In general, forecasts on the morning of March 18th had no mention of snow. This was in an era when computer forecast models were just in their infancy and it was even before satellite imagery existed which could aid in the forecast. By afternoon on that particular day, the light rain had changed into huge, wet snowflakes and - for the next few days - history was being made.
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