The month of March has been unusually dry in the Mid-Atlantic region, but a soaking rain event will begin on Thursday and continue into early Friday. High pressure takes control again today we’ll have a bit of a warm up compared to the chill of the past couple of days. A strong low pressure system will then push into the Ohio Valley on Thursday and ultimately, to a position off the Mid-Atlantic coastline by early Friday. As a result, rain should push into the area early Thursday and continue off and on into early Friday. As colder air filters in from the northwest, there is a chance that the rain mixes with or changes to snow by early Friday before the precipitation event winds down in the I-95 corridor. A cold start to the weekend will follow as Canadian high pressure builds back into the northeastern quadrant of the nation. Looking ahead, warmer weather returns early next week with highs back up in the 60's.
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It has been an unusually dry month of March so far in the Mid-Atlantic region with zero precipitation reported in DC, Philly and NYC. The impact of the dry spell has actually been made worse with an extremely dry air mass in recent days featuring abnormally low dew point temperatures of below zero – indicative of very low moisture content in the atmosphere. Strong low pressure will bring this dry stretch to an abrupt end later in the week with significant precipitation from Thursday into Friday. The rain that falls on Thursday and Thursday night in the Mid-Atlantic region can be moderate-to-heavy at times and there is a chance that it changes briefly to snow on Friday as colder air wraps into the system.
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Weak low pressure is pushing into the Mid-Atlantic region and it could produce a bit of light rain here from later today into tonight - not at all a significant precipitation event. There can be a few ice pellets mixed in during the next few hours in the far northern and western suburbs. High pressure will take control again at mid-week we’ll have a bit of a warm up compared to the chill of yesterday and today. A stronger low pressure system will impact the region from Thursday into Friday - much more of a significant precipitation event - with rain on Thursday and Thursday night that can change briefly to snow on Friday. This late week event will be the first decent precipitation we've had in the region during the month of March.
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It is now the middle of March and the spring equinox is less than a week away, but winter is still hanging on in many portions of the nation. There are actually two chances of frozen precipitation this week in the Mid-Atlantic/Northeast US and the past couple of days has seen a blockbuster snowstorm in the Rockies that indeed turned out be one of the all-time greats in places like Denver, Colorado and Cheyenne, Wyoming.
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High pressure to our north continues to have an influence on the weather in the Mid-Atlantic region as we begin the new work week with cold and dry conditions. Temperatures are starting the day in the upper 20's in many locations and dew points are generally in the single digits - indicating this is an extremely dry air mass. Weakening low pressure to our west is push towards the Mid-Atlantic region and it should hold together enough to produce a light wintry mix here from late tonight into late Tuesday. High pressure will take control again at mid-week we’ll have a bit of a warm up compared to the chill of today and tomorrow. A stronger low pressure system will likely impact the region from Thursday into Friday with rain that can change to snow on Friday.
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The warm up that began here on Tuesday reached its peak yesterday with temperatures reaching well into the 70’s and today will remain unseasonably warm, but colder air is on the way for the DC metro region. Low pressure will track northeast across the Great Lakes today and will drag a cold front through the region paving the way for a much cooler weekend. In fact, temperatures later tonight will drop into the upper 30's to go along with a stiff NW wind and they'll hold in the middle 50's for afternoon highs on Saturday. Another low pressure system could produce a bit of precipitation around here early next week and it could be just cold enough for a bit of a wintry mix. One final note, clocks will need to be turned ahead early Sunday morning as we switch back to daylight savings time.
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The warm up that began here on Tuesday will likely reach its pinnacle in temperatures this afternoon with highs in the mid-to-upper 70's. A broad southwesterly flow of mild air continues today across a large portion of the eastern US on the backside of a strong high pressure system that is drifting over the western Atlantic Ocean. Low pressure will track northeast across the Midwest on Friday and it will drag a cold front through this area tomorrow night paving the way for a much cooler weekend in the Mid-Atlantic region. In fact, temperatures this weekend are likely to hold in the low-to-mid 50’s for afternoon highs – quite a change from the mid-to-upper 70's expected this afternoon. Another low pressure system could impact the Mid-Atlantic region early next week and it could be just cold enough for some frozen precipitation to be in the mix. One final note, clocks will need to be turned ahead early Sunday morning as we switch back to daylight savings time.
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A broad southwesterly flow of milder air has formed on the backside of strong high pressure which is now situated over the western Atlantic Ocean. This high pressure system had its origins last week over the central part of Canada, but has drifted southeastward over the past few days. The milder air mass worked its way into the eastern states on Tuesday and it’ll stay warmer-than-normal here into the day on Friday. A strong cold front will pass through the Mid-Atlantic region on Friday night paving the way for much colder weather this weekend and signs point to additional colder-than-normal outbreaks for the Mid-Atlantic region during the second half of March. One final note about the upcoming weekend, it will be time once again to turn the clocks ahead early Sunday morning.
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Clockwise winds on the back side of a strong high pressure system over the western Atlantic Ocean have produced a broad flow of warmer air from the southwest-to-the northeast and temperatures will respond noticeably here by afternoon. This warm up will actually intensify later in the week and it'll stay well above normal right through Friday. A late week cold frontal passage, however, will usher in much cooler air for the weekend with temperatures likely confined to 50 degrees for highs by the time we reach Sunday afternoon.
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High pressure that first formed over central Canada has drifted southeastward over the past few days and it will emerge out over the western Atlantic Ocean by tomorrow. As a result, clockwise winds on the back side of the high have produced a broad flow of air from the southwest-to-the northeast and temperatures have responded noticeably higher across the central Plains and Upper Midwest. This warm up will expand into the eastern states by tomorrow afternoon and it’ll stay on the warm side of normal for much of the remainder of the week. In fact, 70 degrees is possible here on Wednesday, Thursday and Friday before a late week frontal passage ushers in colder air for the weekend.
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