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Weather forecasting and analysis, space and historic events, climate information
Filtering by Category: Medium Range Outlooks
Spring has sprung, but that is not quite the end of the cold air outbreaks for the Mid-Atlantic region and the Northeast US. In addition, snow cannot be ruled out for interior sections this weekend with the influx of cold air and perhaps there will be another snow threat early-to-mid next week.
Read MoreMany ingredients are going to come together for a very active Arctic cold frontal passage this weekend that will result in rain transitioning to sleet and accumulating snow on Saturday and high winds and very cold conditions for Saturday night and Sunday. There will first be significant accumulations of snow across interior sections of the Mid-Atlantic/NE US on Saturday and then all the way into the immediate DC-to-Philly-to-NYC corridor. Wind gusts of 50+ mph are likely throughout the northeastern quadrant of the nation from later tomorrow through tomorrow night and into early Sunday with downed tree limbs and scattered power outages on the table. The weather will calm down some by later in the day on Sunday, but it’ll remain much colder-than-normal for this time of year and then a warm up begins on Monday.
Read MoreMany ingredients are going to come together for an extreme wind event in the Mid-Atlantic region and Northeast US from later Saturday into Saturday night. In addition to the expected high winds, snowfall on the back side of an Arctic cold front will be significant across interior sections of the northeastern quadrant of the nation. There can even be some accumulating snow all the way down into the DC-to-Philly-to-NYC corridor and perhaps to coastal sections of the eastern US. Wind gusts of 50-60 mph are possible later Saturday and Saturday night and that kind of intensity raises the possibility of downed tree limbs and power outages in the Mid-Atlantic/Northeast US. The weather will calm down some by later in the day on Sunday, but it’ll remain much colder-than-normal for this time of year with highs generally confined to the 30’s in the I-95 corridor.
Read MoreAfter today’s mix of snow and rain in areas to the north of the PA/MD border and cold rain to its south, the Mid-Atlantic will enjoy relatively tranquil conditions on Thursday and Friday as high pressure builds across the region. It will, however, turn quite active again as we begin the upcoming weekend with an Arctic cold front advancing into the eastern states. This cold frontal system will have a lots of support in the upper atmosphere which will help to contribute to the formation of surface low pressure along the frontal boundary zone and this system will intensify rapidly as it pushes northeastward.
Rain is likely ahead of the Arctic front in the Mid-Atlantic region from Friday night into early Saturday and some of it can be heavy at times and a strong thunderstorm is also possible. On the back side of the front, temperatures will drop sharply, the rain will change over to accumulating snow across interior sections of the Mid-Atlantic and perhaps all the way into the I-95 corridor. In addition, high winds are likely to develop from later Saturday into Saturday night as a strong pressure gradient forms between the departing storm system and a strong high pressure in the southern states.
Read MoreThe wild weather pattern continues in the Mid-Atlantic region…
First, we’ll have to deal with some snow on Wednesday in parts of the Mid-Atlantic region which can even result in small accumulations; primarily, on grassy surfaces to the north of the PA/MD border. Low pressure will push from the Tennessee Valley early tomorrow to southeastern Virginia and then to a position out over the open waters of the western Atlantic Ocean by later in the afternoon.
Looking ahead, a bigger concern than tomorrow’s system will be a very active Arctic cold frontal passage early this weekend that will be accompanied by some vigorous support in the upper part of the atmosphere and a rapidly intensifying surface low pressure system. That next strong cold front will come with pre-frontal rains and possible strong thunderstorms and post-frontal extreme winds are likely as is a changeover to accumulating snow across interior sections of the Mid-Atlantic/NE US. In fact, there is the possibility for some post-frontal accumulating snow all the way down into coastal sections of the northeastern quadrant of the nation. Very cold air for this time of year will envelope the entire region for the Saturday night/Sunday time period and then a big time warm up will take place in the first half of next week as the wild temperature swings continue.
Read MoreTalk about some wild weather…
The Mid-Atlantic region will experience some March madness of its own over the next 48 hours or so with record-warmth today along with high winds and late day/evening heavy showers and scattered strong-to-severe thunderstorms and then much colder conditions by mid-week with the chance for accumulating snow. Today’s weather is courtesy of an approaching strong cold frontal system that will pass through the area tonight and set the stage for much colder weather by mid-week. Low pressure will push towards the southern Mid-Atlantic coastline by early Wednesday and it can be cold enough for some accumulating snow in parts of the Mid-Atlantic region. Another impressive cold blast will reach the eastern states early in the upcoming weekend.
Read MoreTemperatures tumbled in the overnight hours in the Mid-Atlantic region following the passage of a cold frontal system and setting the stage for a wintry mess from today into early Friday. In fact, temperatures dropped nearly 40 degrees in the I-95 corridor from the lower 70’s on Wednesday afternoon to the lower 30’s by early today as high pressure strengthened into southeastern Canada. From this location, this high pressure system will act as an anchor and a source region for cold air during the next 24 hours – a classic “cold air damming” pattern for the northeastern part of the nation. This kind of an atmospheric setup is setting the stage for mixed precipitation today and an icy buildup later tonight for many in the Mid-Atlantic region and there will likely be an impact on the Friday AM commute.
Read MoreThe passage of a cold front will bring about big changes in temperatures in the Mid-Atlantic region with today’s 60’s plunging to the freezing mark by early tomorrow. This influx of cold, dense air in the overnight hours will set the stage for a wintry mess from later tomorrow into early Friday. Some parts of the Mid-Atlantic will experience accumulating snow at the onset of this winter weather event and other areas will likely end up with a significant ice buildup including across much of southern and central Pennsylvania. The Friday AM commute is likely to an icy mess from the suburbs of Philly to the north and east including in and around the NYC metro region.
Read MoreToday will be another mild day in the Mid-Atlantic region with periods of rain as low pressure pushes from the Upper Midwest towards the southeastern part of Canada. The current mild stretch will peak on Wednesday afternoon with the breakout of sunshine after a cloudy start and temperatures are quite likely going to reach 65-70 degrees in the DC-to-Philly-to-NYC corridor. The passage of a cold front later tomorrow will then bring about big changes in the temperature department in the overnight hours setting the stage for a winter weather event from later Thursday into early Friday. The winter weather event could include some snow accumulations; primarily, across the northern Mid-Atlantic and a potential significant buildup of ice in places like southern and central Pennsylvania.
Read MoreIt’ll be quite mild in the Mid-Atlantic region through mid-week, but then it turns much colder on Thursday and that cool down could be accompanied by some icing in much of the area. Temperatures today should make it into the 50’s and they’ll remain on the mild side on Tuesday, but it’ll become quite wet as well with a decent rainfall on the way from later tomorrow into tomorrow night. The warmest day of the week is likely to be on Wednesday ahead of the next cold front with temperatures likely to climb well up in the 60’s, but then big temperatures changes will take place by Thursday. Looking beyond the possible ice event later Thursday, numerous signs point to a continuation of winter weather conditions in the eastern states as we wind down the month of February and then flip over to March. In fact, there is a good chance for a very cold air mass to arrive in the east by early next week and it could be preceded by some snowfall.
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