High pressure takes control of the weather today and provides us with plenty of sunshine and quite mild conditions for the afternoon. A cold front reaches the region later tomorrow and there will likely be some shower activity associated with this system to go along with the continuing mild conditions. Colder air follows into the Mid-Atlantic for Friday, but it quickly turns milder again on Saturday as a “clipper” system slides well to the north of here. That system will drag a cold front through the region on Saturday night and it’ll turn cold once again for the early part of next week.
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Today’s weather features above-normal temperatures across much of the nation and the remainder of the week will be generally on the mild side including in the Mid-Atlantic region where high temperatures of 60+ degrees will be commonplace. As nice as it may feel during the next few days, it appears likely that additional cold air outbreaks will make their way from Canada into the US during the next few weeks and this “back and forth” in temperatures could set the stage for multiple severe weather outbreaks during the month of March perhaps with a focus in the region from the Gulf coast to the Tennessee Valley. As the new month progresses, increasing strength of the sun will allow for warmer air masses to develop down across the southern states and any incoming cold air mass from Canada can produce “clash zones” with the prospects of severe weather. One such threat could take place next week somewhere in the middle of the nation with cold air from the north and west pushing towards warm, humid air to the south and east and there can be a repeat performance in the week to follow.
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A weak cold front will cross the area later today and it can produce a couple of afternoon showers and then high pressure returns at mid-week…both days should feature afternoon high temperatures in the low-to-mid 50’s. A stronger cold front passes through later Thursday with some shower activity and it turns colder at the end of the week. A “clipper” system will pass by to the north on Saturday and it’ll turn milder, but then another cold frontal passage ushers in colder air for Sunday and Monday.
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The week starts off on a milder note with temperatures climbing to near 50 degrees for afternoon highs. A weak cold front will cross the area later tomorrow with a shower or two possible and then high pressure returns at mid-week. A stronger cold front passes through late Thursday with some shower activity and it turns colder at the end of the week.
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Today will be another cold and windy day in the Mid-Atlantic region with well below-normal temperatures and gusts up to 35 mph or so. The combination of departing strong low pressure out over the Atlantic Ocean and an incoming high pressure system in the middle of the country is resulting in a tight pressure gradient across the region; hence, winds will be strong throughout the day from a northwesterly direction. Temperatures moderate this weekend with afternoon highs back to 40+ degrees by Sunday and it’ll turn even milder during the first half of next week.
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Arctic air covers much of the nation again today with a continuing tight grip on the central states where numerous daily low temperature records have been set all the way from the Dakotas to Texas and, in a few cases, monthly low temperature records have been challenged. The average temperature across the continental US earlier today was 15.0°F below the average for this time of year and, in a few spots, temperatures were between 45 and 50 degrees below the average (e.g., Nebraska, SW Missouri). Temperatures will gradually moderate over the upcoming weekend and next week promises to feature above-normal temperatures across a wide part of the nation. It is, however, quite likely that additional very cold air masses will be able to make their way from northern Canada into the central and eastern US as the month of March gets underway.
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As surface low pressure intensifies today out over the western Atlantic, a northern stream wave of energy in the upper part of the atmosphere will pass directly over the Mid-Atlantic region and this will enhance upward motion and produce quite unstable conditions. As a result, there is likely to be some snow or snow shower activity in the DC-to-Philly-to-NYC corridor and small accumulations of a coating to an inch or so are possible…watch out for slippery spots later today; especially, during bursts of heavier snow. On the backside of the departing strong low pressure, another very cold and windy (gusts to 40 mph) day is in store for the Mid-Atlantic region with well below-normal temperatures on Friday and even lower wind chill values.
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Arctic air covers much of the nation today with a particularly tight grip on the central states where numerous daily low temperature records have been set all the way from the Dakotas to the Rio Grande Valley region of southern Texas. The average temperature across the continental US earlier today was 15.4°F which is well below normal for this time of year and only the state of Florida could boast about warm weather conditions.
In addition to the widespread cold, accumulating snow fell yesterday across portions of the Middle Mississippi Valley and significant snow today will spread from the Tennessee Valley to the southern Mid-Atlantic region. The DC metro area will be on the northern edge of today’s “southern stream” system and can receive a coating to an inch or so; especially, across the southern suburbs. On Thursday, a “northern stream” wave in the upper atmosphere will pass right over the Mid-Atlantic region and likely result in some snow or snow shower activity in the DC-to-Philly-to-NYC corridor. The week ends with yet another very cold and windy day on Friday in the Mid-Atlantic region with well below normal temperatures and even lower wind chill values.
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Low pressure is organizing over the northern Gulf coast this morning and it will then head in an east-northeast direction reaching the waters off the Carolina coastline by early tomorrow morning. From there, the low pressure system will continue on an east-northeast track and undergo rapid intensification while out over the open waters of the western Atlantic. At the same time low pressure is intensifying rapidly off the coast on Thursday, a vigorous wave of energy in the northern jet stream will pass right overhead of the Mid-Atlantic region and this will enhance upward motion and produce quite unstable conditions. As a result, there is likely to be some snow or snow shower activity in the Philly metro region on Thursday and small accumulations of a coating to an inch or so are possible. On the heels of the low pressure, another windy and very cold day is coming to the Mid-Atlantic region on Friday, but temperatures should modify by the latter part of the weekend and the early part of next week.
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Arctic chill dominates the scene today across much of the eastern two-thirds of the nation and will continue to do so during the next few days. Indeed, there were numerous daily low temperature records set this morning with a focus on the north-central states (e.g., Glasgow, MT; Bismarck, ND; Duluth, MN) where wind chills of 50 degrees below zero have been commonplace. In addition to the cold, the wintry pattern will result in a snowstorm during the next couple of days that will first hit the Middle Mississippi Valley region (e.g., northern Arkansas/southern Missouri) and then extend to the southern Mid-Atlantic region (e.g., southeastern VA, Delmarva Peninsula). There can even be some snow in the DC-to-Philly-to-NYC corridor from later tomorrow into Thursday as low pressure intensifies off the coast and a northern stream upper-level low passes overhead creating an unstable environment...small accumulations are possible. Looking ahead, though temperatures will relax later this weekend into early next week, there are signs that additional Arctic cold air outbreaks will impact the central and eastern states as we close out the month of February and begin March.
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