Low pressure tracks northeastward today from the Carolina coastline to the western Atlantic as strong, cold high pressure to our north shifts away from the region. There will be periods of rain today and some of it can come down hard at times. Accumulating snow is likely to fall across upstate PA and NY as well as in the interior sections of New England. High pressure builds in briefly on Tuesday and it’ll turn a bit milder with some sunshine, but this on-going active weather pattern will result in another storm system for late Tuesday night and Wednesday with additional periods of rain.
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Unseasonably warm weather on Friday in the Mid-Atlantic region gave way to a much colder weekend following the passage of a strong cold frontal system. The cold air mass in place today across the Mid-Atlantic region and Northeast US is being anchored by a strong, cold high pressure now situated over the southeastern part of Canada. Moisture will advance northeastward later tonight towards the Mid-Atlantic region and our entrenched cold air mass will be reluctant to give up its ground as high pressure slides toward the Canadian Maritimes. As a result, there is the chance for snow or a mix of rain and snow in much of the northern Mid-Atlantic region later tonight into early Monday with significant snow possible across interior, higher elevations of upstate PA, New York and New England.
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Unseasonably warm weather dominates the scene today in much of the Mid-Atlantic region with temperatures at mid-day ranging from the 70’s in DC to the 60’s in Philly while stubborn cool air is hanging on in NYC with temperatures in the 50’s. A strong cold front is closing in on the eastern states at this hour and will produce afternoon and evening showers and perhaps a strong-to-severe thunderstorm or two. Following the passage of the strong cold front later tonight, the weekend will become progressively colder as strong high pressure builds into southeastern Canada. By the end of the weekend, moisture will be advancing northeastward towards the Mid-Atlantic region and our entrenched cold air mass will be reluctant to give up its ground as high pressure slides toward the Canadian Maritimes. As a result, there is the chance for some snow or a mix of rain and snow in at least parts of the DC-to-Philly-to-NYC corridor from later Sunday night into early Monday with significant snow possible across interior, higher elevations of the Mid-Atlantic and NE US.
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A warm front pushed through the Mid-Atlantic region late yesterday and its passage along with an advancing strong cold front will set the stage for an unseasonably warm end to the work week. Ahead of the strong cold front, winds will pick up noticeably and temperatures will surge through the 70’s. The record high today at Reagan Airport is 83 degrees and it is 77 degrees at Dulles Airport which is well within reach. In addition, showers are likely; especially, during the afternoon and evening hours and there can be a strong-to-severe thunderstorm mixed in as well. Following the cold frontal passage, it’ll turn progressively colder this weekend as strong high pressure builds to our north across southeastern Canada. By the end of the weekend, we’ll have to monitor the progression of moisture from the south-central US. Given the entrenched cold air mass that will be reluctant to retreat, any precipitation that arrives late Sunday night or early Monday could be in the form of snow or a mix of rain and snow in the far northern and western suburbs.
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Tomorrow may turn out to be the warmest day so far this season in the Mid-Atlantic region with temperatures soaring to the 70’s in the DC-to-Philly-to-NYC corridor ahead of a strong cold frontal system. In addition, there will be occasional showers; especially, during the afternoon and evening hours and perhaps a strong-to-severe thunderstorm or two mixed in as well. Following the passage of the strong cold front late Friday night, the weekend will become progressively colder as strong high pressure builds into southeastern Canada. By the end of the weekend, moisture will be advancing northeastward towards the Mid-Atlantic region from the Tennessee Valley and our entrenched cold air mass will be reluctant to give up its ground. As a result, there is the chance for some snow or a mix of rain and snow in at least parts of the Mid-Atlantic region early next week and significant snowfall may fall across upstate New York and New England.
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A warm front is pushing northward through the region today and its passage tonight will set the stage for an unseasonably warm weather this afternoon and especially on Friday. A strong cold front is going to arrive here tomorrow night and there are likely to be some showers ahead of it and perhaps a strong thunderstorm or two. In addition, the winds will pick up noticeably on Friday and temperatures should soar through the 70’s following the much milder conditions this afternoon. Following the Friday night cold frontal passage, it’ll turn progressively colder this weekend and we’ll have to closely monitor the threat for precipitation by early next week as strong high pressure builds to our north across southeastern Canada. There is the chance that if the precipitation arrives early enough on Sunday night or early Monday, it could begin as snow or a mix of rain and snow given that the entrenched cold air mass will be slow to retreat.
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An active weather pattern continues across the nation and this will lead to more chances of rain in coming days and also quite a topsy-turvy temperature pattern. A weak cold front crossed the region late yesterday and high pressure will dominate the scene today providing mild and rain-free conditions. Low pressure and its attendant warm front will influence us with a soaking rain event from later tonight into early Thursday. A strong cold front is going to arrive here late Friday with additional showers, maybe even a strong thunderstorm. It’ll turn milder on Thursday and then windy and unseasonably warm on Friday ahead of the strong cold front with highs in the upper 70's. The late week frontal passage will pave the way for a colder weekend as strong, cold high pressure expands eastward across the northern US and southern Canada. We’ll have to monitor closely the threat for some snow in the far northern and western suburbs by early next week as moisture pushes northeastward out of the south-central US and towards the Mid-Atlantic region with a cold air mass still in place.
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An active weather pattern continues across much of the nation and this will lead to more chances of rain in the Mid-Atlantic region and also quite a topsy-turvy temperature pattern. A weak cold front will cross the region later today and then high pressure will dominate the scene tonight and on Wednesday. Low pressure and its attendant warm front will then influence us with rain on Wednesday night and Thursday morning and some of it can be heavy at times. A strong cold front is likely to arrive here by late Friday with additional showers, maybe even a thunderstorm. It’ll turn much milder on Thursday and then very warm on Friday ahead of the strong cold front, but its passage will pave the way for a colder weekend as strong, cold high pressure expands eastward across the northern US and southern Canada.
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The week will start off with strong high pressure over southeastern Canada and this will keep us a bit on the chilly side with afternoon highs generally in the lower 50’s (normal high now at DCA is 54 degrees). The high will push off to the east by tonight and this will open the door to somewhat milder air, but also the chance of showers as the next arrives later tomorrow. It’ll turn warmer later in the week, but then a strong cold front arrives just in time to pave the way for a colder weekend.
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Showers will wind down this morning as a cold front approaches the region and winds will pick up this afternoon after its passage with gusts to 30 mph or so. It turns colder tonight with clearing skies and diminishing winds and it stays on the chilly side Saturday, Sunday and Monday as a cold, strong high pressure system builds to our north across southeastern Canada.
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