Quite an unsettled week is coming to the Mid-Atlantic region with multiple chances for rain. Low pressure and its associated frontal system will continue to affect the region today and tonight with plenty of clouds and additional showers, maybe a few strong thunderstorms. Another low pressure area will slide up along the Mid-Atlantic coastline on Tuesday likely bringing additional rain to the region. The unsettled pattern will continue during the second half of the week with another low pressure system meandering in the region for days and additional rounds of rain are likely.
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A persistent cool and damp weather pattern has taken over in the Mid-Atlantic region. In fact, the best that can be said about the weather through early next week is that part of Saturday may be rain-free albeit mainly cloudy and cool. Light rain or drizzle is likely today and tonight and then soaking rain is likely later tomorrow into early Sunday and again Sunday night into Monday as low pressure forms in the Mid-Atlantic region. Temperatures throughout the next several days will remain below normal for this time of year.
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A stalled out frontal system in the Mid-Atlantic region will act as a conduit for moisture over the next couple of days that is now streaming northeastward from the Ohio Valley. The result will be damp and cool weather in the region as we close out the work week with occasional showers. High pressure will try to bring some clearing to the northern Mid-Atlantic region on Saturday, but light rain or drizzle cannot be completely ruled out around here and more rain is likely from Saturday night into Monday as low pressure forms in the Mid-Atlantic region.
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A cold front has stalled out nearby and showers will ride right along this boundary zone affecting the DC metro region at any time. Low pressure will move along this boundary zone on Thursday and Thursday night and showers are likely to continue and that threat will last into Friday as well. High pressure should keep us dry on Saturday, but then more showers are expected to arrive for Sunday and Monday.
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It is nearly May and yet snow is falling today across much of Northern New England and also across portions of the Rockies and western US. These two unusually cold air masses associated with the snow are contributing to increasing atmospheric instability in the Mid-Atlantic region and the central Plains as they clash with neighboring warm, humid air. As a result, scattered strong-to-severe thunderstorms are likely in the DC-to-Philly-to-DC corridor later this afternoon and evening, and a more serious severe weather outbreak is possible from Texas to Nebraska with several tornadoes possible across the U.S. heartland.
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A slow-moving cold front will approach from the north today and the result will be increasing instability in the atmosphere and the threat for showers and scattered strong thunderstorms. Any strong thunderstorm during the mid-day or afternoon hours can contain heavy downpours, damaging winds and small hail. High pressure will try to bring about some clearing on Wednesday, but clouds will likely dominate then low pressure will approach from the west on Thursday and the threat for showers will increase once again and that threat will linger into Friday.
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Canadian high pressure took control of our weather this weekend, but it will move offshore today. A slow-moving cold front will approach the area from the north later today and stall out on Tuesday. As a result, the threat for showers will increase tonight and remain high on Tuesday and we’ll likely have to wait until Wednesday for clearing to return to the region and that will just be temporary as more showers threaten for the latter part of the week. Elsewhere, ingredients appear to be coming together for a severe weather and tornado outbreak in the middle of the country on Tuesday with Oklahoma and Kansas the likely the prime target areas.
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A cold frontal system will slide through the Mid-Atlantic region by later tonight and it’ll bring some PM shower activity to the area along with the chance for a thunderstorm or two. The good news is that clearing skies should set in on Saturday and the bulk of the weekend will turn out to be rather nice for this time of year. Canadian high pressure will take control this weekend and its associated air mass will be a little bit on the cool side resulting in pleasant afternoons, but quite chilly nighttime conditions. A frontal boundary returns to the area early next week and the threat of showers will increase once again.
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Clouds will increase later today ahead of an approaching cold front and the recent stretch of dry weather should come to an end overnight and on Friday with occasional showers and perhaps a thunderstorm or two. We’ll get back to rather nice weather this weekend as Canadian high pressure takes control in the Mid-Atlantic region. A frontal boundary in the area will increase the chances again for showers during the early part of next week. One final note, as low-level winds become southwesterly, smoke could reach the DC metro region from a growing wildfire in the Shenandoah Valley National Park (southwestern Virginia).
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Today will turn out a bit cooler than recent days and it’ll remain rain-free as the dry weather pattern continues for the Mid-Atlantic region. Clouds will increase tomorrow ahead of an approaching cold front and the dry weather should come to an end tomorrow night and Friday with some shower activity and perhaps a thunderstorm or two. We’ll get back to rain-free conditions this weekend and then it’ll turn slightly cooler as begin the new work week.
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