The turn of the calendar on Wednesday from June to July will come with the arrival of the hottest weather of the year so far and it’ll persist into the upcoming holiday weekend. In fact, temperatures can reach or even slightly surpass the 100 degree mark for afternoon highs during the second half of the week and humidity will be at very uncomfortable levels as well. Intense upper-level ridging of high pressure will be a key player during this upcoming heat wave as it becomes centered over the northeastern states for a several day period and influences the entire DC-to-Boston I-95 corridor.
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The month of June has been relatively benign in terms of overall temperatures along the I-95 corridor, but the flip to July on Wednesday will set off the atmospheric furnace in the northeastern states. The time period from tomorrow through Saturday, the 4th of July, will feature afternoon high temperatures near or even slightly above the 100-degree mark in much of the DC-Boston corridor with record highs in jeopardy. Intense upper-level high pressure ridging will be the key player and catalyst for the excessive heat and humidity in the northeastern part of the nation. At the same time, the western states will enjoy colder-than-normal conditions with deep upper-level trough persisting in that part of the nation.
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The turn of the calendar on Wednesday from June to July will come with the arrival of the hottest weather of the year so far for the Mid-Atlantic region and it’ll persist into the upcoming holiday weekend. Temperatures can reach or even surpass the 100 degree mark during the second half of the week for afternoon highs and humidity will be at very uncomfortable levels as well. Intense upper-level ridging of high pressure will be a key player during this heat wave as it becomes centered over the Great Lakes for a several day period and influences the entire DC-to-Boston I-95 corridor.
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The threat of showers and thunderstorms has returned to the Mid-Atlantic and the risk will continue through tomorrow night as a frontal system only painfully slowly works its way through the region. In addition, low pressure will ride along the frontal boundary zone from the central Plains and it can enhance rainfall around here on Saturday. The second half of the weekend and early part of next week should feature dry and quite warm conditions and then a hot spell begins on Tuesday and likely continues through the rest of the week with afternoon highs well up in the 90’s all along the I-95 corridor.
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An overall active weather pattern across the nation will continue into the month of July and it is currently resulting in some severe weather across the central Plains and also the risk of flash flooding. In fact, the risks of severe weather and flash flooding will extend well to the east during the next few days and likely reach the Mid-Atlantic region at the start of the upcoming weekend. Low pressure and a painfully slow-moving frontal system will play key roles in the unsettled weather conditions into the weekend. Looking ahead to next week, hot weather will push into the DC-to-Philly-to-NYC corridor by Tuesday and high temperatures well up in the 90’s are likely in the big cities through the end of the work week.
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After a dry, warm day here on Thursday, the threat of showers and thunderstorms will increase tonight and continue for the next couple of days as a frontal system slowly works its way through the Mid-Atlantic region. The second half of the weekend and early part of next week should feature dry and quite warm conditions and then a hot spell begins on Tuesday and likely continues through the rest of the week with afternoon highs well up in the 90’s.
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Low pressure has pushed away from the Mid-Atlantic region and the mid-week will feature drier and warmer conditions with high pressure in control of the weather. The late week will feature another frontal system that will generate an increasing chance of showers and thunderstorms by Thursday night and a continuing chance on Friday and Saturday. Temperatures will remain at moderately warm levels through the upcoming weekend, but signs point to a warm-up that will likely bring afternoon highs into the 90’s for the middle and latter parts of next week.
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Low pressure will only slowly push off to the northeast today and there will be occasional showers and maybe a thunderstorm or two…some of the rain can be heavy and some of the storms can be strong. After a quieter mid-week, another frontal system will approach the area during the late week raising the chance of showers and thunderstorms from later Thursday into the upcoming weekend. Temperatures will remain at rather moderate levels through the upcoming weekend, but signs point to a summer-like warmup for next week.
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Low pressure will impact the Mid-Atlantic region from later today into the overnight hours with two threats on the table...severe weather and flash flooding. This low-pressure system will push eastward into southern Pennsylvania later today and end up over southern New England by late tonight. An upper-level jet streak will add fuel to the fire in the Mid-Atlantic region with strong upward motion that is destabilizing the atmosphere and thunderstorm coverage is increasing across western sections. Localized flash flooding can result from the “training” of thunderstorm cells meaning multiple storms may move over the same general area producing excessive rainfall amounts.
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The work week will start off on the wet side as low pressure heads in this direction from the Midwest. There will be occasional showers from this afternoon into Tuesday and multiple thunderstorms can be mixed into the picture. Some of the rain will be heavy and some of the storms can be severe and there is the threat of localized flooding as thunderstorms can develop in a “training” fashion meaning multiple heavy rain cells could move over the same general area. The rest of the week will feature moderately warm temperatures with no sustained high heat and humidity on the table despite it being officially the first week of the summer season.
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