A cold front passed through the Mid-Atlantic region on Sunday night and a secondary cold front will come through on Monday evening. This secondary cold front will usher in true Arctic air for the region with its origins way up in the high latitudes and the stretch of weather from Monday night through Tuesday night will feature some of the coldest conditions we’ve experienced in quite awhile and some “face-slapping” wind chills. The “Great Lakes snow machine” has been activated with the Arctic air mass flowing over the relatively warm waters and will continue into Tuesday for downstream locations. Looking ahead, the overall weather pattern is likely to evolve into one that can produce storms in the eastern US during at least a 10-day stretch beginning this weekend.
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A strong cold front passed through the region on Sunday night and it has ushered in a cold air mass for today, and a reinforcing Arctic front will pass through early tonight - true Arctic air will follow this second front. The approach and arrival of the Arctic front later today/this evening could produce some snow shower activity in the Mid-Atlantic region. The coldest core of this Arctic air mass will be across the area from tonight through tomorrow night as high pressure edges into the area. Temperatures will modify on Wednesday and Thursday, but we’ll have to get through a 36-hour or so deep freeze first - conditions we haven’t seen around here in quite awhile.
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Accumulating snow ended this morning across the Mid-Atlantic region and, in its wake, there are quite windy and cold conditions with partial sunshine. The next threat of wintry precipitation looks like it will come early in the day on Sunday, January 9th and this time, it will likely be in the form of freezing rain and/or sleet. The opportunity for icing will come on Sunday morning as milder air tries to advance northeastward into what will be a cold and dense air mass. It doesn’t take much in the way of icing to have an important impact on travel conditions. Whatever precipitation does fall on Sunday, it will certainly be followed by an Arctic outbreak for the early part of next week that will feature some very impressive cold for the northeastern quadrant of the nation.
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Low pressure that generated the overnight snowfall continues to intensify this morning as it pushes northeastward over the open waters of the western Atlantic. This system will push fairly rapidly during the next few hours to a position off the east coast of Maine by mid-day. Snow will continue for awhile this morning and it can be heavy at times in some areas. Skies will clear this afternoon and it’ll become quite breezy and temperatures will do no better than the middle 30’s for highs. Later tonight, temperatures will likely drop into the middle teens and Saturday will remain much colder-than-normal for this time of year despite some sunshine. Milder air will try to push into the area late Saturday night and Sunday and this process may initially result in some snow or ice in some areas. By later Sunday, temperatures should be able to reach the 40 degree mark, but the warm up will be short-lived as another impressively cold air mass will arrive early next week following the passage of the next cold frontal system.
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An upper-level disturbance is helping to generate surface low pressure in the southeastern states at mid-day and this system will intensify over the next 24 hours as it moves rather quickly to the northeast - likely reaching the waters off of eastern Maine by mid-day on Friday. Accumulating snow will spread across the DC-to-Philly-to-NYC corridor later tonight and it’ll wind down on Friday morning from southwest-to-northeast. There are likely to be small-scale heavier snow bands that develop later tonight/early Friday associated with mid-level “frontogenetic forcing” and these will produce localized higher accumulation amounts. It’ll be quite cold during and after the storm and another very impressive cold air blast will arrive in the Mid-Atlantic/Northeast US early next week.
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An upper-level disturbance will help to develop low pressure today in the southeastern states and this system will intensify as it moves fairly quickly to the northeast reaching the waters off of eastern Maine by mid-day Friday. Accumulating snow will spread across the region later tonight and it’ll wind down late tomorrow morning likely with total accumulations of 3-6 inches although isolated higher amounts are possible. Temperatures will drop well down into the teens on Friday night in the wake of the low pressure system and it’ll stay quite cold on Saturday. A brief warm up into the 40’s on Sunday afternoon will be followed by another impressive cold shot early next week following the passage of another cold frontal system.
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Today will turn a little bit milder in the Mid-Atlantic region as low-level winds increase in intensity from a southwesterly direction ahead of the next cold frontal system. That cold front will shift to our east later tonight and its passage will usher in another cold air mass for the latter part of the week. On Thursday, an upper-level disturbance will help to spawn the formation of low pressure in the southeastern states and this system will intensify as it moves fairly quickly to the northeast reaching the waters off of Maine by mid-day Friday. Some accumulating snow will spread across the DC-to-Philly-to-NYC corridor on Thursday night and it’ll likely come to a quick end early Friday resulting in a moderate snowfall for the region. Temperatures are likely to drop to the teens on Friday night all along the I-95 corridor in the wake of the low pressure system and another cold air blast will arrive early next week into the Mid-Atlantic region.
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High pressure will shift off the coast today and this will allow for somewhat milder air to push into the Mid-Atlantic region from the Ohio Valley. Initially, this action may produce a touch of freezing rain as low-level temperatures hover near freezing early in the day, but temperatures should climb into the 40’s this afternoon aided by an increasingly strong southwesterly wind. A cold front will pass through the region in the overnight hours paving the way for a colder air mass for the late week. The next threat of accumulating snow for the Mid-Atlantic region comes on Thursday night and early Friday as low pressure pushes to near the Mid-Atlantic coastline. At this time, the late week event looks like a moderate snowfall - perhaps on the order of 3-6 inches - as the low pressure system will be moving along at a pretty good clip. Perhaps a bigger story is the cold that will likely accompany and follow this late week event and then another cold blast is destined to arrive early next week. The blast early next week could turn out be a doozy with “single-digit” type cold…get ready for those heating bills.
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The month of January got off to a very mild start in the Mid-Atlantic region this past weekend, but a strong cold frontal passage on Sunday night changed that around quite dramatically by Monday. In addition to the influx of the cold air mass, significant snow fell across parts of the region from the DC metro area to the Delmarva Peninsula to the Jersey Shore, but there was a sharp cutoff on the northern fringes with little or no snow at all in the Philly and NYC metro regions. The next threat of accumulating snow for the Mid-Atlantic region comes on Thursday night and early Friday as low pressure pushes to near the Mid-Atlantic coastline. Perhaps a bigger story, however, is the cold that appears to be on the way. An impressive cold shot will likely accompany and follow this late week system into the Mid-Atlantic region and then another cold blast is destined to arrive early next week. The blast early next week could turn out be a doozy with “single-digit” type cold…get ready for those heating bills.
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High pressure will stay in control of the weather from today into tomorrow and, after a cold day on Tuesday, it’ll turn a bit milder on Wednesday as the high shifts off the east coast. A word of caution…as the milder air first tries to push in early on Wednesday, there can be a touch of freezing drizzle. A cold front comes through the region on Wednesday night and it’ll usher in another cold air mass for the latter part of the week. Another strong disturbance in the upper atmosphere will head in this direction later Thursday and it is likely to result in the formation of low pressure near the Mid-Atlantic coastline on Thursday night and Friday. This system certainly has the potential to produce accumulating snow in the Mid-Atlantic region and Northeast US on Thursday night and Friday morning and will be monitored closely during the next couple of days.
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