Our first extended stretch of very warm and humid weather will continue for the next few days with high temperatures close to 90 degrees on a daily basis. The main weather maker is a strong high pressure system over the western Atlantic Ocean which is pumping in the very warm and humid air mass from the southeastern states into the Mid-Atlantic region. The chance of showers and thunderstorms will exist through this very warm period given the high levels of low-level moisture with the highest chance for rain coming during the PM hours. It turns somewhat cooler later in the week following the passage of a cold front.
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Our first extended stretch of very warm and humid weather will continue for the next few days with afternoon temperatures not far from 90 degrees right through mid-week. The main weather maker is a strong high pressure system over the western Atlantic Ocean which is pumping in the very warm and humid air mass from the southeastern states into the Mid-Atlantic region. The chance of showers and thunderstorms will exist each day through this very warm period given the high levels of low-level moisture. The highest chance for rain will come during the PM hours over the next few days and any shower or thunderstorm can produce some heavy rainfall. It turns cooler later in the week following the passage of a cold front.
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The combination of a moist air mass, surface frontal systems, and a slow-moving upper-level trough is bringing more rainfall to the Mid-Atlantic region and there can be downpours later in the day and again tonight which could result in some localized flash flooding. In addition, there is the potential for strong-to-severe thunderstorm activity ahead of an advancing cold frontal system. The upper-level trough will still be to the west of the I-95 corridor on Friday leading to an unsettled day and the possibility of additional showers and thunderstorms. High pressure builds across the eastern states this weekend and a classic summertime “Bermuda high” setup is likely to result in hot, increasingly humid and summer-like weather for the period from Sunday-to-Wednesday with daily high temperatures at or above the 90 degree mark in the I-95 corridor.
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The combination of a moist air mass, surface frontal systems, and a slow-moving upper-level trough is bringing more rainfall to the Mid-Atlantic region. One batch of rain has already moved through the area associated with a northward-moving warm frontal system. Additional showers are coming later today into tonight and there is the threat for some strong-to-severe thunderstorm activity. Any rain later today and tonight can fall heavily at times. The threat for showers and storms will continue on Friday and then high pressure will build into the eastern states by early this weekend. This system will then move into a classic summertime “Bermuda high” position and the result here will be a hot and summer-like stretch of weather from Sunday into Wednesday with increasingly uncomfortable humidity levels.
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The combination of an increasingly moist flow of air, two surface frontal systems, and a slow-moving upper-level trough will raise the prospects for downpours in the Mid-Atlantic region on Thursday and Thursday night and also the chance for strong-to-severe thunderstorm activity. The rain may actually come in two different waves – one late tonight/early Thursday associated with a warm frontal system and a second late tomorrow and tomorrow night associated with a cold front. High pressure builds across the eastern states this weekend and a classic summertime “Bermuda high” setup is likely to result in hot, humid and summer-like weather for Sunday, Monday and Tuesday with high temperatures at or above the 90 degree mark in the I-95 corridor.
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A surface frontal system will combine with increasingly moist air and a slow-moving upper-level trough to bring us more rainfall on Thursday and Thursday night. The potential does exist for downpours in this type of pattern and strong-to-severe thunderstorm activity is on the table as well. Looking ahead, it looks like it’ll get very warm later this weekend and early next week with highs likely at or above 90 degrees on Sunday, Monday and Tuesday as high-pressure ridging takes over in the eastern states.
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The weekend was very chilly in the Mid-Atlantic region and it was accompanied by a soaking rain event which was actually beneficial (despite its poor timing) due to the recent dry spell. It looks like more significant rainfall is on the table for Thursday and Thursday night and it could include strong-to-severe thunderstorm activity. The combination of an increasingly moist flow of air, surface frontal system, and a slow-moving upper-level trough will raise the prospects for the rain and potential severe weather in the Mid-Atlantic region.
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After a very chilly and wet Saturday and Sunday, the holiday weekend closed out on a nice note with the return of sunshine and much milder conditions. High temperatures over the weekend were confined to the upper 50’s in much of the DC metro region – some 20-25 degrees below-normal for late May – but they did rebound nicely on Monday. It’ll remain much closer to seasonal warmth during the next few days and a frontal system promises to bring us more beneficial rainfall during the second half of the week. Looking ahead, it looks like it’ll get quite warm this weekend with highs likely to be well up in the 80’s on both days.
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Not the best of timing, but a well-needed and soaking rainfall is on the way for the Mid-Atlantic region as we begin what will be a very cool Memorial Day weekend with temperatures as much as twenty degrees below-normal. Low pressure will move from the Midwest on Friday to the coastal waters of the Mid-Atlantic by later tomorrow and it’ll combine with high pressure to the north to generate a chilly rainfall over a widespread area. It'll remain very cool and unsettled on Sunday with a few lingering showers possible and then increasing amounts of sunshine and noticeably milder conditions are likely on Monday, Memorial Day...very likely to be the best weather day of this long holiday weekend.
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Temperatures remain quite warm today across the Mid-Atlantic region, but dew points have come down noticeably since last night’s frontal passage. Big changes are coming by the weekend, however, with respect to temperatures that could drop to as much as twenty degrees below-normal for the late stages of the month of May. Low pressure will move from the Midwest on Friday to the coastal waters of the Mid-Atlantic by later Saturday and it’ll combine with a building high pressure system across southeastern Canada to generate the first widespread and soaking rain event in weeks for the Mid-Atlantic region. It’ll remain very cool for this time of year on Sunday and unsettled with lingering showers possible. The best weather day of the long holiday weekend is quite likely going to be Monday with increasing amounts of sunshine and noticeably milder conditions.
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