Low pressure will gradually pass through the Mid-Atlantic region over the next 24 hours or so bringing with it the chance of showers to the local area. Large high pressure to our north should clear things out for the latter part of the work week. Another low pressure system is likely to bring more rain to the Mid-Atlantic region this weekend.
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Temperatures started off in the upper 30’s in some suburban locations early this morning and despite a full day of sunshine, it’ll stay quite chilly for this time of year to start the new work week and there will still be a noticeable breeze. Low pressure is then expected to cross the Mid-Atlantic region from Tuesday into Wednesday bringing with it the chance of showers. Large high pressure should clear things out for the latter part of the work week.
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A cold frontal system will generate showers in the Mid-Atlantic region today and thunderstorms can mix into the picture as well. Following closely on its heels, a secondary cold frontal system is to arrive later Saturday and bring with it another round of showers and possible strong thunderstorms. Behind that second cold front, much cooler air will push into the region for the Sunday/Monday time frame and overnight low temperatures could dip into the 30’s in some suburban locations. In fact, snowflakes are possible in higher elevations of western/central NY and upstate PA during this next cold air outbreak. It’ll turn warmer later next week, but there will also be multiple chances for rain and some of it may be on the heavy side.
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High pressure pushed in from the north yesterday and the nicer weather will hold on for another day in the NYC metro region. Clouds will return tonight and showers are likely on Friday as a cold front approaches the I-95 corridor. Thunderstorms can also mix into the picture tomorrow in the Mid-Atlantic region with the next front. A secondary cold front will arrive later Saturday and bring with it another round of showers and perhaps a thunderstorm. Behind that second cold front, much cooler air will push into the region for Sunday/Monday and overnight low temperatures could drop to the 30’s in some suburban locations.
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The first ten days of May have featured below normal temperatures in the DC-to-Philly-to-NYC corridor (DC: -3.9°F, PHL: -5.0°F, NYC: -5.8°F) and more cold air is coming for the latter part of the weekend and the early part of next week. In fact, overnight low temperatures could drop into the 30’s early next week in some suburban locations along I-95. Looking down the road, it appears this consistently chilly weather pattern of late will dramatically change in about ten days or so and we could very well experience hot weather by late May as we approach the Memorial Day holiday weekend. In addition, there are signs that the tropics could become active for the first time this season by the end of May in a year that should be more active than recent years in the Atlantic Basin (Tropical Outlook).
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A warm frontal system has stalled out well south of the area and high pressure to our north will expand southward today. As a result, early morning clouds should give way to plenty of sunshine and the improved conditions should last through Thursday as well. By tomorrow night, however, clouds will return to the area ahead of an approaching cold front and showers and thunderstorms are likely as we close out the work week. Additional showers are likely on Saturday as another frontal system arrives and then chilly air for this time of year will arrive for Sunday.
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A warm frontal system will cause an increase of clouds today and there is the threat for late day showers. High pressure to our north will expand southward by tomorrow and it’ll produce a couple of decent days around here. A cold front will approach by Friday and is likely to generate showers and thunderstorms at the end of the work week. More showers are likely on Saturday with the approach of a cold front and chilly air for this time of year will arrive for Sunday.
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Skies finally cleared on Sunday to allow for sunshine in the Mid-Atlantic region that had been missing for several days and today will feature plenty of sunshine along with very comfortable temperatures. Today’s clear skies, however, will not last too long as a warm frontal system will cause an increase of clouds by Tuesday and there is the threat for showers. High pressure to our north will expand southward at mid-week and produce a couple of decent days around here. A cold front is likely to generate showers and thunderstorms at the end of the work week.
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A strong coastal storm will produce copious amounts of rain today in the Mid-Atlantic region as our "stuck-in-place" cool and unsettled weather pattern continues. Rain will be heavy at times today and there can be some strong thunderstorms that form this afternoon and coastal flooding is a threat at high tides. The blocking pattern in the upper atmosphere will ensure that any improvement that takes place this weekend will be on the slow side. In fact, showers are possible at just about any time during the day on Saturday and then are likely Saturday night into early Sunday as a cold front crosses the region. Following the frontal passage, bona fide sunshine should return for Mother’s Day afternoon along with a stiffening breeze and temperatures will respond nicely. Looking ahead, next week looks like a warm week; especially, when compared to the past several days, but rain will threaten by mid-week.
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As colder air pushes towards the east coast from the Upper Midwest, a deep upper-level trough will intensify along the east coast. At the same time, deep upper-level trough will strengthen along the US west coast and strong ridging will pop up across the middle of the country producing the signature of a classic “omega” blocking pattern across the US. Air over Mexico and the Southwest US will be forced to the north into the Northern Plains and then back south again into the southeastern US and Gulf of Mexico region by the vast high pressure ridge in the central US. In the Mid-Atlantic region, where we are stuck under a deep upper-level trough, surface low pressure will form just off the coastline later today and then meander around for the next 36 hours or so. The result will be periods of rain in the area both later tonight and Friday and given the prolonged period of onshore flow, this scenario could result in some coastal flooding. The weekend will feature slow improvement given the "omega" blocking pattern. Showers are possible on Saturday and then likely Saturday night/early Sunday as a cold front crosses the region. The sun should break out Sunday afternoon and temperatures will climb through the 60's for afternoon highs.
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