Strong high pressure centered to our west will settle over the region on Wednesday and Thursday. This high will stay in control generating cold and dry weather conditions around here for the remainder of the work week. Low pressure will approach from the southwest on Saturday presenting us with another shot at a cold rain event or perhaps a combination of rain and snow.
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Strong high pressure will build into the eastern US early this week and it should result in cold, dry weather for much of the time. Highs over the next couple of days will be confined to the 30's and lows late each night could drop into the upper teens. Low pressure will approach from the southwest this coming weekend presenting the next chance of rain and/or snow.
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Dew point temperatures have plunged in the last 24 hours as a cold and very dry Arctic air mass takes hold in the Mid-Atlantic region and this will set the stage for a wintry mess on Saturday to include snow, sleet, freezing rain and some accumulations. This Arctic air mass is being anchored by strong high pressure building into the southeastern part of Canada and it will be very reluctant to give up its ground on Saturday as precipitation moves in from the Ohio Valley. As a result, temperatures will struggle to climb above freezing on Saturday; especially, in the northern and western suburbs along the DC-to-Philly-to-NYC corridor and this will likely result in an extended period of frozen precipitation.
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Strong high pressure will build over southeastern Canada today and temperatures here will struggle to reach the middle 30’s. Winds will continue to be brisk gusting up to 30 mph or so, but they won’t be as strong as yesterday. Clouds will thicken up in the overnight hours and precipitation will head this way early tomorrow from the Ohio Valley. Given the cold and very dry air mass in place on Saturday morning, the initial batch of precipitation is quite likely to begin as snow and/or sleet in the early-to-mid-morning and there can be accumulations of a coating to an inch or so. During the afternoon, it'll turn somewhat milder in the upper atmosphere, but the low-level cold, dry and dense air mass will be reluctant to give up its ground. As a result, surface temperatures will struggle to climb above the freezing mark for much of the day; especially, in suburban areas to the north and west and this can lead to some icing problems on untreated surfaces. By tomorrow night, surface temperatures should climb above freezing in the immediate DC metro region, but some freezing can still occur in areas to the north and west. Another cold, windy day is in store for the area on Sunday and the new work week will begin with quite cold conditions.
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Watch the dew points over the next 24 hours or so as they will plummet as a cold and very dry Arctic air mass pours into the Mid-Atlantic region on strong NW winds that can gust to 50 mph. This incoming air mass will be anchored by strong high pressure centered over the southeastern part of Canada from Friday into Saturday and it will set the stage for an extended period of frozen precipitation on Saturday in the Mid-Atlantic. Temperatures will only be able to reach the low-to-mid 30’s for highs on Friday afternoon in the DC-to-Philly-to-NYC corridor…some 20 degrees lower than yesterday. On Saturday, low pressure will move from the Upper Midwest to the central Great Lakes and precipitation will slide eastward from the Ohio Valley into the Mid-Atlantic region. Given the cold and very dry air mass in place on Saturday morning, there is likely to be an extended period of frozen precipitation in the Mid-Atlantic region with accumulations of snow and ice likely at the onset of this event.
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Temperatures climbed well into the 50’s on Wednesday which is well above-normal for mid-January but a much colder air mass arrives today following the passage of a strong cold frontal system. The much colder air mass will ride into the region on strong NW winds that can gust to 50 mph at times later today into early tonight. Strong high pressure will build into southeastern Canada on Friday and high temperatures here will struggle to pass the middle 30’s and therein lies a problem for Saturday morning. Low pressure will move from the Upper Midwest on Saturday to the central Great Lakes and precipitation will move east into our area most likely during the morning hours. Given the cold and dry air mass in place as we begin the weekend, there is likely to be a period of frozen precipitation at the onset with snow and ice accumulations possible of a coating to an inch or so. Temperatures should climb through the 30’s on Saturday allowing for a transition of the snow/ice to plain rain by later in the day. Another cold air mass will arrive on Sunday again riding in on strong NW winds and Monday and Tuesday promise to feature some of the coldest weather so far this season.
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Temperatures are climbing into the 50’s today in the I-95 corridor which is well above-normal for this time of year, but a strong frontal passage early tomorrow will usher in a much colder air mass for the end of the work week. The much colder air will ride into the region on strong NW winds that can gust to 50 mph at times. Strong high pressure will build into southeastern Canada on Friday and high temperatures in the I-95 corridor will be some 20 degrees lower compared to this afternoon’s readings. On Saturday, low pressure will move from the Upper Midwest to the central Great Lakes and precipitation will move east into our area. Given the cold, dry air mass in place on Saturday, there is likely to be a period of frozen precipitation at the onset in the DC-to-Philly-to-NYC corridor with some accumulations likely.
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Temperatures will make a noticeable rebound today from yesterday’s chilly conditions and should make it into the middle 50's which is well above normal for mid-January. A strong cold front, however, will cross the region early tomorrow and its passage will usher in a much colder air mass to close out the work week. This Arctic air mass will ride in on strong NW winds later tomorrow and tomorrow night that can gust past 40 mph. Strong high pressure will build across southeastern Canada on Friday and temperatures will struggle here to reach the middle 30's. Low pressure over the Great Lakes region on Saturday will spread precipitation our way and with a cold, dry air mass in place, there can be some snow and/or ice at the onset with minor accumulations. A cold, windy and dry day is setting up for Sunday to follow the wintry mess to start the weekend.
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Temperatures will climb back into the 50’s on Wednesday in the I-95 corridor which is well above-normal for this time of year, but a strong frontal passage early Thursday will usher in a big change for the end of the week. Arctic air will flood the region later Thursday and Thursday night riding in on strong NW winds which can gust past 40 mph. As a strong cold high pressure system builds into southeastern Canada on Friday, temperatures in the I-95 corridor will struggle to reach the middle 30’s. The influx of an Arctic air mass anchored by strong high pressure to the north will set the stage for a wintry mess on Saturday in the Mid-Atlantic region that is likely to include some accumulating snow; especially, north of the PA/MD border. This late week blast of Arctic air does not look like it will be an isolated event as there will likely be numerous cold air outbreaks for the central and eastern US in coming weeks.
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A strong cold front will push through the Mid-Atlantic region on Thursday and Arctic air will follow at the end of the work week. High pressure will build across southeastern Canada as we begin the weekend and this system will be a key player in the likelihood of accumulating snow on Saturday. Low pressure will develop over the Midwest on Saturday and a frontal system extending to its east will generate west-to-east moving precipitation which will most likely arrive as snow in the I-95 corridor from DC-to-Philly-to-NYC The low pressure system will head towards the eastern Great Lakes and a secondary system may try to form near the Mid-Atlantic coastline. It is likely that the snow which falls at the onset of the weekend storm system will transition to a mix of rain, sleet and snow and perhaps then change back to all snow before ending early Sunday. The cold air mass that arrives by Friday will be reluctant to give up its ground on Saturday as it’ll be anchored by a strong high pressure system to the north.
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