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 light wintry mix from later today into tonight - not at all a significant precipitation event. 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 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 Tuesday into Tuesday night and small snow accumulations are possible. 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 likely reached its peak yesterday with temperatures reaching the 70 degree mark and today will remain unseasonably warm; however, colder air is on the way for the NYC 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 low-to-mid 30's to go along with a strong NW wind and they'll hold at or below 50 degrees 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 near the 70 degree mark. 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 at or slightly below 50 degrees for afternoon highs – quite a change from 70 degrees expected this afternoon. 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 this afternoon. This warm up will intensify later in the week and it'll stay above normal right through Friday. A late week cold frontal passage, however, will usher in much colder air for the weekend and temperatures are likely to be confined to the 40's for afternoon highs.
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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, 60+ degrees is likely here on Wednesday, Thursday and Friday before a late week frontal passage ushers in colder air for the weekend.
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A cold frontal system dropped through the region early yesterday and it ushered in a colder air mass that will stick around right through the upcoming weekend. In addition to the chill, winds will continue to a factor from the northwest causing it to feel even colder than the actual ambient air temperature. This colder air mass is anchored by strong high pressure across southern Canada which will remain in control through Sunday at which time it’ll begin to shift eastward. Looking ahead, once this high pressure system shifts to the western Atlantic Ocean early next week, a big warm up will develop in the eastern half of the nation. This warm up will first develop across the central US and then it'll expand into the eastern US. Much warmer conditions will arrive here in the Mid-Atlantic region for the Tuesday/Wednesday/Thursday time frame with highs likely near 60 degrees by the middle of next week.
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