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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The combination of a warm front and a cold front will result in some rain around here during the next 24 hours and perhaps a thunderstorm or two. The south-to-north moving warm front arrives late tonight resulting in occasional rain after midnight and a chance for a thunderstorm. A cold front will sweep through by mid-day Friday and it will be preceded by very mild conditions tomorrow morning, occasional rain, and perhaps a thunderstorms. The winds will pick up noticeably tomorrow afternoon following the cold frontal passage gusting past 30 mph or so. It turns colder tomorrow night with clearing skies and less wind and stays on the chilly side this weekend.
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A cold front passed through the region in the overnight hours and today will feature the return of high pressure with some sunshine and moderately cool conditions. A warm front will push through the area late tomorrow and then a cold front will follow by mid-day Friday. As a result, showers are likely to return to the area from later tomorrow night into Friday and then it'll turn colder for the upcoming weekend. A weak low pressure system could bring a touch of rain and/or snow to the area on Saturday night or early Sunday and then another warm up will take place next Tuesday and Wednesday.
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The week started off with very nice weather conditions on Monday as there was plenty of sunshine and temperatures at or above the 70 degree mark for afternoon highs. Today will remain mild; however, there will be occasional showers and maybe a thunderstorm as well as a cold front pushes towards the east coast. The air behind the front will not be all that chilly at mid-week and high pressure will resume control. A stronger cold front will arrive on Friday night with more showers possible as we close out the week and it is going to turn colder this weekend.
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The week will start off with very nice weather conditions as high pressure remains in control across much of the eastern US. Plenty of sunshine today will boost afternoon temperatures into the 70’s throughout the metro region. A cold front will approach the area on Tuesday and it could spawn some shower activity in the Mid-Atlantic region and perhaps even a thunderstorm or two. High pressure will resume control on Wednesday and the air behind the cold front will not be all that chilly so temperatures at mid-week should be able to climb back to 60 degrees. A stronger cold front arrives at the end of the week.
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Explosive intensification is about to take place with an ocean storm now over the western Atlantic. A strong “clipper” system is moving into the Mid-Atlantic region and it is interacting with the upper-level energy that remains from the ocean storm which soaked the southern US earlier in the week. This interaction will result in a drop of central pressure of the ocean storm from around 992 millibars (29.29 inches) at the current time to around 965 millibars (28.50 inches) by the middle of tonight. While this ocean storm is situated well off the east coast, it is still going to influence the Mid-Atlantic region late today and tonight as an inverted trough (aka “norlun” trough) is forming from the center of the low pressure system northwestward to the Mid-Atlantic. As a result, there are rain showers this afternoon throughout the Mid-Atlantic region and even a few embedded thunderstorms. However, as colder air aloft becomes wrapped up into the overall system, a mixing with and changeover to snow is possible later today or early tonight in many spots and there can even be some grassy accumulations; especially, in higher elevation suburban locations.
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A strong “clipper” system will drop southeastward into the Mid-Atlantic region today and it’ll feature some rather cold air in the upper part of the atmosphere. At the same time, the southern storm that soaked the southern states in recent days will intensify after it moves out over the open waters of the western Atlantic. In fact, this storm could intensify to a point where it is produces hurricane-force winds by tonight in the western Atlantic. While this ocean storm will be situated well off the east coast, it’ll still have an influence in the Mid-Atlantic region as an inverted trough (aka “norlun” trough) will extend from the low pressure center all the way back to the Mid-Atlantic. The combination of the “clipper” system and the inverted trough associated with the ocean storm is going to lead to rain showers today in the DC metro region and rain and/or snow showers tonight. In some “norlun” trough scenarios, small-scale heavier bands of precipitation can form and we’ll have to closely monitor that possibility late today and tonight; especially, in areas like the Delmarva Peninsula. Following today’s mess, the weekend will start off on the chilly and dry side in the DC-to-Philly-to-NYC corridor, but a major warm up will take place early next week. In fact, the weather on Monday should feature sunshine and warmth with temperatures well up in the 60’s for afternoon highs.
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