Comfortable conditions will continue for another day in the Mid-Atlantic region, but it'll turn much warmer and more humid on Thursday and then hot, humid weather looks rather likely for much of the upcoming weekend. In terms of rainfall, an isolated shower or thunderstorm will be possible on Friday and showers and thunderstorms threaten later Saturday into early Sunday as a frontal system approaches the area. One final note, NASA/Wallops will attempt the “artificial cloud” rocket launch very early tomorrow morning (between 4:25 and 4:48 AM).
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High pressure continues to control our weather in the Mid-Atlantic region and temperatures should remain rather comfortable for late June through tomorrow. Later in the week, a return of hot and humid weather will take place and with it will come an increasing chance for showers and thunderstorms. It looks like once that return to somewhat unsettled weather returns by the end of the week it’ll stick around right into the early part of next week.
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Following the passage of the remains of Tropical Storm Cindy, a refreshing air mass for late June has pushed across the Great Lakes and into the Mid-Atlantic region. Temperatures for the next few days will be rather comfortable around here for this time of year and downright cool for the Great Lakes, Upper Midwest and Northern Plains. It’ll turn very warm again towards the end of the week and the summer-like humidity will return. The weather pattern will likely become unsettled again at the end of the week and that unsettled weather looks like it will continue through the weekend and into the early part of next week. A stalled out frontal boundary zone it likely to bring us a daily chance of showers and thunderstorms during this upcoming unsettled stretch. One final note, in the "deja vu" department, NASA/Wallops once again postponed the artificial cloud rocket launch which was scheduled for Saturday night - no new date has been set.
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The remains of Tropical Storm Cindy are resulting in heavy rainfall today across portions of the Mississippi and Tennessee Valley and this area of moisture is headed to the Mid-Atlantic region. The tropical moisture associated with Tropical Depression Cindy should arrive in our area late tonight and early Saturday and some heavy rainfall is likely and there can be strong-to-severe thunderstorms mixed in. In addition to the tropical storm-related rainfall expected late tonight and early Saturday, an approaching upper-level wave of energy will destabilize this afternoon and the result will likely be scattered showers and thunderstorms into the early evening and some of these storms can be on the strong-to-severe side. Bottom line, it looks like an interesting period from this afternoon to about mid-day on Saturday in the DC-to-Philly-to-NYC corridor. The good news is that most of the rainfall will pull out of here by tomorrow afternoon and the weekend should close out on a pretty nice note from later tomorrow through Sunday.
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The remains of Tropical Storm Cindy will interact with a slow-moving frontal system and produce some heavy rainfall around here late tonight and early Saturday. Before that tropical moisture arrives, there will likely be an occasional shower and possible strong-to-severe thunderstorm later today into early tonight, any of which can produce some heavy rainfall. Most of the rainfall should move out of here by tomorrow afternoon and the weekend will close out rather nicely late Saturday and Sunday. One final note, NASA/Wallops will try again early tomorrow night with its sounding rocket launch that should produce colorful artificial clouds visible in DC (look southeast), Philly and NYC (look south-to-southeast).
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High pressure will bring us another day with plenty of sunshine and it’ll turn very warm and become more humid. The weather becomes unsettled on Friday and Saturday as a slow-moving frontal system approaches the region and this will increase our chances for some shower and thunderstorm activity. In addition, the remains of Tropical Storm Cindy will head in this general direction after making landfall early today. It is possible that some of the moisture associated with the remains of Cindy gets absorbed by the frontal system and, if so, that could exacerbate the rain on Friday night and earlySaturday in parts of the Mid-Atlantic region. High pressure builds back into the region early next week and temperatures will be fairly comfortable for late June. In fact, the middle of the country will experience some downright chilly air for late June from later this weekend into next week.
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Following Monday’s cold frontal passage, the weather quieted down on Tuesday and it’ll stay relatively nice today with plenty of sunshine and warm conditions; however, an isolated afternoon shower or thunderstorm cannot be ruled out; primarily, across northern sections. The weather will become more unsettled again as we head towards the end of the week and we’ll have to monitor Tropical Storm Cindy now over the Gulf of Mexico (latest winds at 60mph). This system is likely to continue on a general northwest track today and make landfall early tomorrow near the Louisiana/Texas border region. One final note, NASA/Wallops postponed last night's scheduled sounding rocket launch until Saturday evening at the earliest.
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There are now two named tropical storms to monitor in the Atlantic Basin with one over the central Gulf of Mexico and the second over the eastern part of the Caribbean Sea. Tropical Storm Cindy has formed in the central Gulf of Mexico and is likely to turn northwest over the next couple of days perhaps making landfall by early Thursday near Galveston, Texas. Meanwhile, Tropical Storm Bret has pushed into the eastern Caribbean Sea and it will likely encounter some strong wind shear in the near term inhibiting further strengthening. It is unusual to have two named tropical storms in the Atlantic Basin during the month of June with the last couple of occurrences in 1959 and 1968. The US hasn’t had a hurricane landfall during June for over 30 years, but the US had three June hurricanes in 1886 – which was the most active hurricane year on record for the US.
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A strong cold front passed through the region last night with lots of shower and thunderstorm activity, but the next few days look to be much quieter. Drier air will push into the area today on the heels of the frontal passage and there should be plenty of sunshine and warmth today, tomorrow and Thursday. The weather will become more unsettled again as we head towards the end of the week and during the upcoming weekend. Elsewhere, the tropics have become quite active and we’ll continue to monitor one system now over the south-central Gulf of Mexico and another one, Tropical Storm Bret, now over the southeastern Caribbean Sea. The Gulf system is likely to intensify somewhat over the next couple of days - perhaps reaching tropical storm status as it slides to the north and then to the west. It is likely to then recurve and turn towards the northeast - perhaps eventually having an impact in the Mid-Atlantic region. Meanwhile, Bret is liable to face some strong wind shear over the next couple of days which is likely to weaken it eventually back to tropical depression status.
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A potent cold front is headed towards the I-95 corridor and it may help to generate severe thunderstorms in DC, Philly and New York City from late today into tonight. Heavy rainfall is likely at times during this event and flash flooding is a concern for the entire region. Any thunderstorm can produce damaging wind gusts, downpours, hail, intense lightning and even possible isolated tornado activity. The most likely timetable for these potential powerful storms is 3pm -9pm.
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