Low pressure will intensify off the Mid-Atlantic coastline today and become increasingly influenced by strong high pressure to the north - a key player in this scenario - which will stymie the storm’s northward progress. The strengthening low pressure system will slowdown and then can take a loop back to the coast during the upcoming weekend. This early season nor’easter will affect much of the Mid-Atlantic region with rain and wind back inland to much of the I-95 corridor and will have its biggest impact along coastal sections where tidal flooding and beach erosion are big concerns at times of high tide. The full moon is reached on Saturday which will only exacerbate the tidal issues…expect rip currents and high surf at all the beaches up and down the east coast throughout the weekend.
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An early season nor’easter will impact much of the Mid-Atlantic region and Northeast US and likely have its greatest affects on coastal sections where tidal flooding and beach erosion are big concerns. The time period for impact by this developing storm system for the northeastern states will be from Friday night through Sunday…a prolonged event. The combination of strong high pressure centered over southeastern Canada and intensifying low-pressure over the western Atlantic Ocean will result in an extended period of onshore flow along coastal sections leading to the tidal flooding and beach erosion issues; especially, at times of high tide - and a full moon on Saturday won’t help the situation. As the Atlantic low intensifies and slowly pushes to the north, it will become increasingly under the influence of the strong high pressure ridging to its north, and this will lead to a slowdown and then likely a loop back to the coast. Rain and wind will extend inland back to the big cities in the I-95 corridor during the Friday night through Sunday time period.
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With deep high pressure to our north and multiple low pressures over the western Atlantic Ocean, our northeast flow of air will continue for the next few days keeping our temperatures below normal for this time of year. In addition, the extended period of onshore flow will bring increasing tidal flooding concerns to coastal sections at times of high tide and the situation will not be helped by a full moon on Saturday. Expect rough surf and rip currents at the beaches all along the Mid-Atlantic coastline right through the upcoming weekend.
Several low pressure systems will consolidate into one strong storm system by the weekend and it’ll run into an atmospheric brick wall to its north featuring deep high pressure from eastern Canada to the northwest Atlantic. This encounter will cause the storm system to slow down and perhaps even take a loop back around to the east coast with big impacts possible along coastal sections from the Carolinas to New England.
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The combination of strong high pressure to the north and multiple low-pressure systems to the east will result in a prolonged period of onshore flow along coastal sections from the Delmarva Peninsula to New England. This extended period of onshore flow will increase the chance for tidal flooding at times of high tide right through the upcoming weekend and a full moon on Saturday will not help the situation. Low pressure will intensify over the weekend as it climbs northward over the western Atlantic Ocean and then it’ll run into a brick wall in the atmosphere with strong riding to its north. As a result, the strong low will slow down, perhaps loop back around towards the coast, and produce rain and wind along coastal sections into early next week.
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With deep high pressure to our north and low pressure over the Atlantic our east-to-northeast flow will continue for the next few days keeping our temperatures below normal for this time of year. The extended period of onshore flow will bring tidal flooding concerns along coastal sections for the next several days and rip currents and high surf can be expected at the beaches. A second western Atlantic low pressure system is likely to intensify by the weekend and it could impact parts of the Mid-Atlantic region with more rain and wind; especially, along coastal sections.
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An unusually strong “cold air damming” weather pattern with deep high pressure to our north is going to result in well below normal temperatures for the next few days. Winds will become quite noticeable from an east-to-northeast direction and the expected extended period of onshore flow will increase the chance for tidal flooding along coastal sections through the remainder of the week. In addition to the chill down, the pattern remains unsettled with occasional rain today and tonight and showers cannot be ruled out for Wednesday.
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An unusually strong “cold air damming” scenario is looking likely for the next few days anchored by a deep high-pressure system centered over southeastern Canada. As a result, a stiff flow of air from the east-to-northeast will form producing far below normal temperatures in the DC-to-Philly-to-NYC corridor for the bulk of the week. In addition to the chill down, the weather will be quite unsettled as well with periods of rain during the next few days as multiple low pressure areas ride along a nearby frontal boundary zone and one of these will intensify over the western Atlantic. With the expected lengthy period of onshore flow, tidal flooding will likely become a big concern along coastal sections by later in the week.
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Temperatures have been consistently peaking well up in the 80’s in recent days along the DC-to-Philly-to-NYC corridor, but there can be quite a change by the middle of next week. An unusually strong “cold air damming” setup is looking likely with deep high pressure centered over southeastern Canada and this could limit temperatures to the 60’s along the I-95 corridor. In addition to the high-pressure system to the north, this scenario will feature a slow-moving frontal boundary zone that will allow multiple low pressure systems to ride along bringing plenty of moisture into the Mid-Atlantic region. And there is the chance that one of these low pressure systems intensifies just off the Mid-Atlantic coastline in “nor’easter” fashion. The bottom line…occasional rain is likely from Sunday into the middle of next week and some of the rain can be heavy at times to go along with much cooler-than-normal temperatures.
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High pressure will return to the area today on the heels of the latest frontal passage and the work week will end on a more comfortable note with lowering humidity values. A stretch of unsettled weather begins on Sunday with occasional rain likely to end the weekend and the rain can get heavy at times. The unsettled weather can last all the way into the middle next week with additional showers from time-to-time and it’ll turn very cool for this time of year. The culprit to the unsettled and cool weather pattern will be strong high pressure to our north combined with a stalled out frontal boundary zone that will allow multiple systems to ride along and bring moisture into the Mid-Atlantic region.
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High pressure will push away from the area today and a cold front approaches from the north and west raising the chance for afternoon and evening showers and thunderstorms. Following the frontal passage on Friday, high pressure will build back into the region providing us with plenty of sunshine and comfortably warm conditions to end the work week. A couple of frontal systems will likely impact the region during the second half of the weekend and the early part of next week producing unsettled weather conditions on Sunday, Monday and Tuesday with the chance of showers and thunderstorms from time-to-time.
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