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 this weekend. 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 this coming hot stretch with the daily chance of scattered 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. Clockwise winds around the high could actually push a weak back door cool front through the region which will help to keep our temperatures at moderate levels for the afternoon and it could cause a couple of late day showers. A stronger frontal system will approach the region tomorrow night and this is likely to result in a better chance of 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 moderately 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 only a slight chance today for a shower or thunderstorm. 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 mid-to-upper 80's, but then climb to the 90 degree mark by the end of 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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Heavy rain bands are rotating around Tropical Storm Fay at this hour and extending northwestward into eastern Pennsylvania, northern New Jersey and southeastern New York. There has already been a boat load of rain over the Delmarva Peninsula with several inches in some spots and flooding has been prevalent in some Delaware beach towns such as Bethany Beach. Tropical Storm Fay will continue to push in a general northerly direction over the next several hours though it could bobble around at times in slightly different directions. The storm’s center is likely to push through New Jersey from south-to-north later today and then continue northward tonight into the Hudson Valley region of New York State.
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Bands of showers and thunderstorms are going to rotate around low pressure today which is now situated near the southern tip of the Delmarva Peninsula and some of the rain will become heavy at times. The best chance for excessive rainfall amounts from Tropical Storm Fay will extend from the Delmarva Peninsula to eastern PA, New Jersey and southern New York. Given the recent heavy rainfall and the well-saturated grounds in much of the Mid-Atlantic region, flash flooding will become an increasing concern as several inches of rain can fall in some spots and there are already reports of flooding in some of the Delaware beaches (e.g., Bethany Beach). In addition to the rain, winds will become quite gusty along coastal sections and strong rip currents are likely to form in the western Atlantic. By later tonight, the low pressure system is likely to push northward into New York State bringing significant rainfall to portions of the interior Northeast US. The weekend will remain somewhat unsettled around here with the chance of scattered showers and thunderstorms and an upper-level trough will likely result in an additional rain threat on Monday and Tuesday. Later next week, it could turn pretty hot later across the Great Lakes, Northeast US and Mid-Atlantic region.
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