A wave of energy in the upper part of the atmosphere is combining with a stalled out frontal boundary zone and plenty of moisture to spark some strong thunderstorm activity in the western part of the Mid-Atlantic region and some of these cells will make it into the I-95 corridor at day’s end. An even stronger wave of energy aloft will likely generate thunderstorms later tomorrow for the Mid-Atlantic region and some of these can reach severe levels with heavy rainfall, hail and potential damaging wind gusts. Elsewhere, the Atlantic Basin tropical scene has become more active with two systems to monitor over the next few days and additional waves are drifting westward over Africa assuring an active last stretch of the month of July.
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A weak frontal system has stalled out across Virginia and it could become the focus area for afternoon and evening shower and thunderstorm activity and again on Wednesday. A stronger front will approach the area on Thursday and this will also result in the chance for showers and thunderstorms. Any storm that forms over the next few days can be on the strong-to-severe side given all the available moisture in the atmosphere and the high levels of potential energy. Following the passage of the late week frontal system, we'll experience a bit of relief on Friday and Saturday, but it is likely to get hot again by the early part of next week.
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High pressure at all levels of the atmosphere will result in another day with excessive heat in the Mid-Atlantic region, but relief does come at the end of the week. There will be a slight chance of showers and thunderstorms later today, tonight and on Tuesday as a weak front limps through the area. An enhanced chance of showers and thunderstorms is likely for later Wednesday into Thursday as a stronger frontal system approaches the region. This front should have enough push behind it to bring some relief here from the excessive heat for Friday and Saturday following its late week passage.
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We are approaching the climatologically warmest time of the year for the Mid-Atlantic/Northeast US/Great Lakes regions of the country and it looks the weather pattern will live up to those long-term averages. The hottest weather of the season so far will begin this weekend and continue through the middle of next week. The hottest days during this stretch for the I-95 corridor will likely turn out to be Sunday and Monday when temperatures should climb to the mid and upper 90’s in the DC-to-Philly-to-NYC-Boston corridor.
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A frontal system that limped through the area last night will now stall along the east coast and this will result in a continuing chance of showers and thunderstorms through tonight. In addition, high pressure over the Northeast US in recent days has pushed off the east coast and this will open the door for hot and humid air to move into the Mid-Atlantic/Northeast US. In fact, the hottest stretch of weather so far this season is coming to the DC-to-Philly-to-NYC-to-Boston corridor with highs well up in the 90’s by later in the weekend and also during the early part of next week. It’ll be humid as well during the hot stretch with the daily chance of showers and thunderstorms.
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High pressure over the Northeast US will stay in control today, but a warm frontal system will arrive tonight increasing the chance for scattered showers and maybe an isolated thunderstorm. That same front will stall out nearby on Friday and the result will be a chance for showers and thunderstorms both tomorrow and tomorrow night. The overall pattern will turn hotter this weekend as a “Bermuda-high” sets up over the western Atlantic Ocean. Temperatures could top out well up in the 90’s later this weekend and early next week with the most oppressive days likely being Sunday and Monday. It’ll be humid as well during this coming hot stretch with the daily chance of scattered showers and thunderstorms.
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High pressure over the Northeast US will continue to dominate the weather scene around here as it migrates slowly eastward. A frontal system will approach the region tomorrow night and this is likely to result in a renewed threat of scattered showers and thunderstorms. That same front will tend to stall out in the eastern states at week’s end and the result will be a continuing chance for showers and thunderstorms on Friday and Friday night. "Bermuda-high" type weather will develop around here this weekend and it could get quite hot with highs in the low-to-mid 90's.
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High pressure builds into the area today and it should have an influence around here through the remainder of the week. Temperatures will continue to be at seasonably warm levels and the chance of showers and thunderstorms will be quite minimal for the next couple of days. Comet NEOWISE is now visible in the evening sky and viewing conditions should be quite good again tonight – look straight down and a little bit to the right from the Big Dipper to near the horizon in the northwest sky about an hour or so after sunset (i.e., around 9:30 PM)…may need binoculars.
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First, there was Comet ATLAS in April which disappointed sky watchers as it broke apart into pieces. Then there was Comet SWAN in May which also disintegrated. And now we have a third comet named NEOWISE and this one is coming through and could be visible until mid-August. In recent days, this comet has dazzled sky watchers and may be the brightest comet since 1997 (Hale-Bopp). The comet will be easier to see in coming days as it climbs in the evening sky towards the Big Dipper (aka Ursa Major).
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A weak front sits off the coast this morning and there is a chance today for isolated showers and thunderstorms. High pressure builds into the area on Tuesday and should have an influence here through the remainder of the week. Temperatures will start off the week at seasonably warm levels with highs in the upper 80's, but then will climb into the 90's later in the week. One final note, Comet NEOWISE has now become visible in the evening sky – look low to the northwest an hour or so after sunset.
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