A cold front passed through the region last night, but temperatures will not change all that much here today and with plenty of sunshine, afternoon highs should reach the upper 70's. Another frontal system will arrive in the area tomorrow night and it can bring us more scattered showers and thunderstorms. Following that frontal passage, temperatures will indeed trend downward for Friday and Saturday with afternoon highs on both days likely near 70 degrees. Looking ahead, it looks like high pressure ridging will persist across the NE US and SE Canada for much of next week and this will prevent any cold air from Canada to head in our direction through at least the middle of the month. In addition, strong and persistent high pressure ridging to the northeast of here this time of year always raises a red flag for any potential tropical systems to “slide underneath” towards the US. Therefore, we’ll need to keep a close eye on the Caribbean Sea, southwestern Atlantic, and Gulf of Mexico during the next couple of weeks.
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A cold front will approach the region later today raising the chances of showers and thunderstorms and some of the storms can be on the strong-to-severe side; especially, across upstate PA. High pressure returns for the mid-week and then another weak cool front will arrive on Thursday night. Following that frontal passage, late week and weekend temperatures will drop back a few degrees to rather comfortable levels for this time of year. Contrary to my earlier thinking, it looks like the colder air that has been bottled up in Canada will remain up there into at least the middle of the month and it may wait to make an appearance around here until after another bout in the eastern US with a tropical system.
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The same high pressure system that brought us a very nice weekend will keep us protected today, but it will slide off the coast by tomorrow. A cold front will approach the region on Tuesday raising the chances of showers and thunderstorms both tomorrow afternoon and tomorrow night. High pressure returns for the middle part of the week and it'll be centered near the Southeast US coastline. Elsewhere, the moisture from Tropical Storm Rosa will head into the Southwest US over the next couple of days and likely result in flooding rains for that part of the nation.
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Low pressure will pull away from the coast today and high pressure will build into the Mid-Atlantic region from the Midwest. As a result, skies should clear late today and the weekend is looking quite nice with dry conditions and comfortable fall-like temperatures.
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As has been the case many times during the past few months, the passage of a frontal system will not be the end of the story in terms of the potential for rain. A strong cool front passed through the region last night and it will stall out this morning just to the southeast of here. Low pressure is going to then ride up along the frontal boundary zone and will spread some significant rainfall into the region from late today into early Friday. Once that system scoots away, high pressure is likely to take over for the weekend leading to dry conditions and very comfortable temperatures throughout the Mid-Atlantic region.
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Temperatures will jump today ahead of a strong cool front that is advancing our way from the Upper Midwest with afternoon highs likely near the 80 degree mark. The arrival of the cool front late in the day/early tonight may be accompanied by some strong-to-severe thunderstorm activity as several ingredients will be in place (e.g., high humidity, upper-level support, temperature clash). As has been the case during much of the summer season, the frontal passage will not be the end of the story as this one - just like many prior - will stall just to our southeast. Low pressure will ride up along the frontal boundary zone on Thursday and likely spread more showers into the region from later tomorrow into Friday. The weekend still has some hope as high pressure should take control likely providing us with dry conditions and comfortable temperatures.
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There will be periods of rain today accompanied by a warm frontal system that is lifting north through the region. A strong cold front will arrive late tomorrow and there can be strong-to-severe thunderstorms associated with that frontal system and temperatures will spike ahead of it to afternoon highs on Wednesday near 80 degrees. High pressure will return for the latter part of the week bringing very pleasant temperatures to the region.
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High pressure will slide off the coast today and a cool front will push our way from the northwest. This front should move through the region late Friday into Saturday and then stall out across southern Virginia over the weekend. By early next week, this frontal system will turn around and advance to the north as a warm front and increase our chances for showers and thunderstorms. Looking ahead, it looks like the first week of October could bring much cooler weather to the Mid-Atlantic region as chilly air from Canada drops southeastward.
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One last hurrah today from what remains of Hurricane Florence as it merges with a frontal system and produces showers and thunderstorms in the I-95 corridor. Some of the rain can be heavy at times today and some of the storms that form can get quite strong with gusty winds as the remnants pass by just to our northwest. After the remnants of Florence exit off of the Northeast US coastline late tonight, high pressure will take over here for the Wednesday-to-Friday time period. We’ll enjoy generally dry and sunny conditions during the second half of the week and then the next front will approach on Friday night from our northwest. The tropics have become generally quiet in the Atlantic Basin and should stay so for the next several days. In fact, as of late Monday, there were no tropical storms/hurricanes/cyclones anywhere around the world which is quite unusual in mid-September and it hasn’t been so since the end of July. There are signs, however, for a resumption of tropical activity in the Atlantic Basin later this month and/or during the month of October.
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The remnants of Florence are centered over the Ohio Valley at mid-day and showers and thunderstorms are wrapping around the system and now impacting much of the Mid-Atlantic region. The threat for occasional rain and thunderstorms will continue in the I-95 corridor into the early part of tomorrow night when a frontal system will finally clear things out. Some of the rain will be heavy at times and some of the storms can be on the strong side. In fact, accelerating tropical systems of this nature sometimes generate tornadic-producing thunderstorms on its east side so that may also become a threat over the next 24-36 hours.
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