High pressure centered over southeastern Canada will continue to have an influence on the weather around here for another few days. Given the position of the high, there will be a consistent low-level flow of air from the ocean (i.e., east-to-northeast winds) and this will keep temperatures in check for the next few days. This high shifts offshore over the weekend and it’ll turn a bit warmer and more humid, but no intense heat is in sight. There will be some tropical moisture sitting just off the coast, but odds favor it staying out there and not making a move to the north and west.
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Comfortable conditions started off the week in the Mid-Atlantic region and the next couple of days look relatively quiet with no intense heat or heavy rain, but there will be plenty of clouds around. High pressure is building to our north and this system will keep temperatures in check around here during the next few days with a low-level flow of air from the northeast. Later in the week, we’ll have to monitor the possible development of a tropical wave near the Southeast US coastline. Whether or not this system intensifies into a named tropical storm, it could push ample amounts of moisture into the Carolinas and potentially, into the Mid-Atlantic region.
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The Atlantic Basin tropical season typically reaches a peak around the middle of September and the month of August usually features a steady ramp up in overall activity. Indeed, adhering to the climatological theme, tropical activity has picked up in the Atlantic Basin right on schedule once we flipped the calendar from July to August, and it is featuring multiple systems. A teleconnection index known as the Madden-Julian Oscillation or MJO is providing support to the idea that the next few weeks will remain quite active in the Atlantic Basin.
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Comfortable conditions to start off the week and the next few days should be rather quiet. High pressure is still in place across the Mid-Atlantic region as we begin the new work week and then another high builds to our north by mid-week and will influence our weather for the remainder of the week. Looking ahead, there is a tropical wave sitting just off the Southeast US coastline and we will need to monitor that system as it could push moisture northward later in the week…potentially even resulting in some rainfall around here by later in the weekend.
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The slow-moving cold front that resulted in numerous showers and thunderstorms in the Mid-Atlantic region on Thursday will edge its way off the eastern seaboard this morning. In its wake, temperatures will be well below-normal as we begin the new month of August and there will be a stiff north-to-northeast wind to go along with mainly cloudy skies and possible lingering showers. Clearing skies set in tonight and we are setting up for one of the nicest weekend of the entire summer season with very comfortable temperatures and humidity levels.
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A major-league cool-down is coming to the Mid-Atlantic region and the transition from the high heat and humidity to the well below-normal temperatures will come with heavy rainfall, strong-to-severe thunderstorms, and localized flash flooding. A slow-moving cold frontal system will approach the area later today from our north and west, but then only be able to inch its way through the Mid-Atlantic region during the next 24 hours as low pressure forms along its boundary zone. Widespread showers and thunderstorms are likely from early this afternoon into the late-night hours and total rainfall amounts can end up being excessive in some spots raising the concern for potentially significant flash flooding. Much cooler air moves in on Friday on the back side of the slowly departing cold front and low pressure system and we are setting up for one of the nicest weekends of the summer season with very comfortable temperatures and humidity levels.
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Today begins a transition in the DC metro region from the high heat and humidity of the past few days to much cooler conditions expected here on Friday...the first day of August. A cold front will slowly grind its way through the area later today and tonight as low pressure forms along the boundary zone. Showers and thunderstorms will become numerous for the afternoon and nighttime hours…some of the rain is likely to be heavy at times, some of the storms can be strong, and localized flash flooding is on the table. Showers can linger on Friday morning and the day will be noticeably cooler (jacket weather) with well below-normal temperatures. In addition, a north-to-northeast wind will be quite noticeable in the counter-clockwise flow of air around departing low pressure off the coast. Clearing skies should develop on Friday night and the first weekend of August may turn out to be one the nicest of the entire summer season featuring very comfortable temperatures and low humidity values.
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Temperatures on Tuesday afternoon peaked at 98 degrees in Philadelphia - tying a record for the date from 2002 – and most other sections in the Mid-Atlantic region experienced high heat and humidity. Today will also be a day of high heat and humidity, but big-time relief is coming by Friday and it’s not out of the question that jackets may be required as we close out the work week (and begin the new month of August). A slow-moving cold frontal system will approach the area later tonight from the north and west, but then only be able to inch its way through the Mid-Atlantic region from tomorrow into tomorrow night as low pressure forms along its boundary zone.
Showers and thunderstorms are likely to be somewhat limited in coverage later today and tonight and then they should become more numerous and widespread on Thursday afternoon and night. Some of the rain will be heavy at times during the PM hours on Thursday, some of the storms can be strong-to-severe, and localized flash flooding is on the table. Showers may linger on Friday – the first day of August - and the day will feature a stiff east-to-northeast wind with low pressure pulling away from the east coast. Clearing skies will set in late Friday night and the first weekend of August may turn out to be the nicest weekend of the entire summer season with comfortable temperatures and low humidity levels.
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Today will be another very hot and humid day with plenty of sunshine during the morning hours and then increasing clouds later in the afternoon. The late day clouds will be in advance of a slow-moving cold frontal system which can result in isolated showers and thunderstorms through the evening hours. More numerous showers and thunderstorms are likely on Thursday in what will be a big-time transition day for the Mid-Atlantic region from the high heat and humidity of the first half of the week to much cooler conditions by week’s end.
As the cold front slowly grinds its way through the area, low pressure will form along the boundary zone and increase the chances for some heavy rainfall on Thursday and Thursday night and localized flash flooding is a possibility. Showers can linger on Friday - the first day of August - and the day will be much cooler with well below-normal temperatures and a stiff E-NE wind. Clearing skies should develop later Friday night and the first weekend of August should turn out to be one of the nicest of the entire summer season with very comfortable temperatures and low humidity values.
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Today should be another rain-free day in the region with plenty of sunshine, but continued very hot and humid conditions and afternoon highs well up in the 90’s. A slow-moving cold frontal system will approach the region at mid-week and it can result in some scattered late day and/or nighttime shower and thunderstorm activity. Widespread showers and thunderstorms are likely on Thursday in what will be a transition day for the Mid-Atlantic region as the cold front slowly grinds its way through the area…there is the potential for heavy rainfall and flash flooding. Showers can linger on Friday - the first day of August - and the day will be noticeably cooler with well below-normal temperatures. An east-to-northeast breeze will be quite noticeable as well with low pressure pushing slowly away from the east coast. Clearing skies arrive on Friday night and the weekend should turn out to be one of the nicest of the entire summer season with very comfortable temperatures and low humidity values.
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