What a difference a new year makes! The overall weather pattern has undergone an important change in the Mid-Atlantic region during the past several days and the warm temperatures of December will soon be missed. An Arctic blast arrives today from the northwest and it will bring the coldest air mass of the season into the region for the next couple of days with temperatures well below-normal for early January and overnight lows way down into the teens in many areas. The Arctic chill eases later this week and moisture will likely head in our direction from the Deep South by the end of the week. Elsewhere, a train of El Nino enhanced storms will slam into California this week alleviating somewhat their drought conditions and some of this activity could play a role in our weather here next week which is full of potential for storminess.
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A colder weather pattern is now taking hold in the Mid-Atlantic region and we’ll experience much more seasonable temperatures for the foreseeable future. Along with the change to colder and drier weather, we’ll also experience more in the way of sunshine compared to the recent persistently cloudy stretch. There will be another cold frontal passage late Sunday which will usher in a true Arctic air mass for Monday and Tuesday. As a result, temperatures won’t climb higher than the 30’s for highs - maybe not even out of the 20's - and there will be a stiff NW wind causing even lower wind chill values.
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A colder weather pattern is now unfolding for the Mid-Atlantic region and the first much more seasonable air mass arrives later today/tonight and it will remain much closer-to-normal temperature-wise right through the upcoming weekend. December has been a very warm month and one full of cloudy days; however, this pattern change will not only bring us colder and drier air, it will also allow for much more in the way of sunshine – at least for the next several days.
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December has been very warm and full of cloudy days...today will be no exception. Temperatures should climb to the 50's later today along with those persistent cloudy skies and showers could arrive after 3pm or so and then continue through the evening. It'll start to turn colder on Thursday as high pressure builds into the region and the return of more "normal" cold air will increase our chances for sunshine on Thursday, Friday and right through the weekend which will remain on the cold side. This late week cold shot signals an overall pattern change which will allow for more sustained cold air outbreaks in the Mid-Atlantic region during the month of January and perhaps even beyond.
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Low pressure to our northwest today will push a warm front through the area and we’ll turn milder again for the mid-week time frame. A strong cold front will arrive on Thursday and its passage will usher in a cold air mass to begin the New Year. In fact, the overall weather pattern is currently undergoing a change that will allow for more sustained cold air in the Mid-Atlantic region during the month of January and perhaps even beyond.
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A cold frontal system passed through the region last night and a large low pressure system will lift out of the southern Plains and into the Great Lakes region later today into Tuesday. The result here will be more rainfall from later today into early Tuesday and it’ll be just cold enough well to the N and W of the District for a few ice pellets to mix in at times. Another low pressure system will pass northwest of our area late in the week and it will sweep another cold front to the east coast bringing a more sustained colder pattern change for the beginning of 2016.
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The record high for today at Reagan National Airport is 69 degrees set in 1933 (66° at Dulles) and it is certainly in jeopardy. In fact, temperatures are likely to climb well up into the 70’s by later in the afternoon. A cool front will slide through by tomorrow bringing slightly cooler air into the area, but it’ll stay well above normal for this time of year. It also stays quite unsettled as more rain should return to the area by tomorrow night and the rain threat will continue on each weekend day.
By Sunday, another significant warm surge will take place in the eastern US and more records could fall. Talk about a nation divided; however, at the same time the eastern states are warm, the western half of the country will be in the deep freeze. Some of that colder air will push across the Great Lakes region and into New York and New England early next week and snow could actually break out in those areas by Monday night or Tuesday.
One final note, the moon will be full on Christmas Day which is actually quite a rare event. The last time the full moon fell on December 25th was 1977, and it won't happen again until 2034.
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Warmer air is now entrenched in the Mid-Atlantic region and it will reach its peak in intensity tomorrow with record highs likely up and down the I-95 corridor. Unfortunately, the warmer weather is accompanied by rain and some of the rain can fall heavily at times later today. The record high in DC for December 24th is 69 degrees set in 1933 and it is certainly in jeopardy. A cool front will slide through by Friday, Christmas Day, bringing slightly cooler air into the area, but it’ll stay well above normal for this time of year. It also stays unsettled late in the week and during the weekend with the threat for more rain late Friday and on each weekend day.
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Warmer air is pushing into the Mid-Atlantic region today and this warm surge will reach its zenith on Thursday. Unfortunately, the warmer weather will be accompanied by periods of rain and some of the rain can fall heavily at times later tomorrow into tomorrow night. The record high for Christmas Eve in DCA is 69 degrees - set in 1933 – and it is in jeopardy this Thursday. A cool front will slide through by Friday, Christmas Day, bringing slightly cooler air into the area, but it’ll stay above normal for this time of year. It will also stay unsettled late this week and weekend with showers possible late Friday and each weekend day.
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After an unusual cold spell for this warm month, temperatures will rebound over the next few days and could reach record high levels once again by Wednesday and Thursday (Christmas Eve) in much of the eastern half of the nation. Unfortunately, the warm up is likely to be accompanied by some rain with a shower threat extending from later today through Thursday. A cool front will slide through by Friday and it’ll turn slightly cooler to end the week, but temperatures will remain above normal for this time of year on Christmas Day.
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