Big changes are on the way this weekend with the influx of a much cooler air mass that had its origins up in northern Canada. A strong cold front will pass through the area on Saturday and winds will pick up noticeably by tomorrow night from a northwesterly direction. Winds will remain an important factor on Sunday as the overall pressure gradient field tightens across the northeastern states as the remnants of Tropical Storm Philippe invigorates this incoming upper-level trough system. Temperatures on Sunday are likely to be confined to near 60 degrees for afternoon highs and the stiff NW wind will make it feel even colder than the actual air temperature. Cooler-than-normal weather is likely to persist for much of next week in the Mid-Atlantic region.
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Tropical systems in both the Atlantic and Pacific Oceans may impact the weather across the US in coming days in somewhat unusual manners. Tropical Storm Philippe has been meandering over the southwestern Atlantic Ocean recently and it will soon accelerate to the north and impact Maine/Nova Scotia with rain and wind later this weekend. After that, the remnants of TS Philippe will get “absorbed” into an incoming upper-level trough over the southeastern part of Canada. This influx of tropical moisture into the upper-level trough will act to energize the system and it will become a big contributor to a temperature pattern change in the eastern states with much cooler weather from this weekend and well into next week. Meanwhile, the eastern Pacific Ocean is now featuring multiple tropical systems and one of these is likely hit the west coast of Mexico by the middle of next week. After that, this tropical system that originated in the Pacific Ocean is likely to cross over Mexico and help to spawn tropical activity over the Gulf of Mexico which potentially can result in rain across the southeastern states.
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While high pressure shifts off the coast today, it’ll remain close enough to generate another decent day in the Mid-Atlantic region with afternoon high temperatures here well up in the 70’s. A strong cold front will approach the area later tomorrow and there will be an increasing chance of showers as we end the work week. The strong cold front should pass through the region on Saturday and winds will pick up noticeably at night with the influx of the coldest air mass of the fall season so far. Winds will remain an important factor on Sunday as the overall pressure gradient field tightens across the northeastern states as Tropical Storm Philippe merges with this incoming upper-level trough system. Temperatures on Sunday are liable to be confined to near 60 degrees for highs and the stiff NW wind will make it feel even colder than the actual air temperature. Cooler-than-normal weather is likely to persist for much of next week in the Mid-Atlantic region.
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Temperatures are some 10+ degrees above-normal today in the Mid-Atlantic region, but big changes are on the way this weekend and the change to noticeably cooler conditions may not be just an “in-and-out” affair. Strong upper-level ridging across the eastern US and Canada will give way to an upper-level trough of low pressure this weekend that will tend to hang around through much of October ensuring additional cold air outbreaks. This initial blast of much cooler air into the east will follow an early weekend strong cold frontal passage and Sunday promises to be the coolest day so far this fall season in the DC-to-Philly-to-NYC corridor. In addition to the cool down, winds will become an important factor by Sunday as the overall pressure gradient tightens across the northeastern states as Tropical Storm Philippe merges with the initial incoming upper-level trough system.
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High pressure remains in control around here for the next couple of days resulting in additional warmer-than-normal weather and featuring plenty of sunshine. A strong cold front arrives early this weekend and it’ll result in a much cooler air mass moving into the Mid-Atlantic region with Sunday very likely to be the coolest day so far this fall season. Temperatures will climb to the low-to-mid 80’s later today and well up in the 70’s on Thursday, but likely will be confined to near 60 degrees for highs by the time we get to the second half of the weekend and the early part of next week.
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High pressure remains in control for the next few days in the Mid-Atlantic region generating above-normal temperatures and plenty of sunshine each day. A strong cold front arrives at the end of the week and it’ll result in a much cooler weekend and early part of next week. Temperatures will climb to the 80’s over the next few days, but may be confined to near 60 degrees for highs by the time we get to the second half of the weekend.
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High pressure builds across southeastern Canada over the next couple of days and an upper-level trough drifts in this direction from the Great Lakes. The combination of these two systems will keep it on the cool side during the remainder of the week with the continuation of onshore (NE) winds. There should be the return of a bit of sunshine today as the high pressure edges into the region, but the upper-level trough can make it unsettled again here later in the week before potential clearing for some of the weekend.
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High pressure builds across southeastern Canada over the next couple of days and an upper-level trough drifts southeast from the Great Lakes. The combination of these two systems will keep it on the cool side during the remainder of the week with the continuation of onshore (NE) winds. There should be the return of a bit of sunshine on Wednesday as the high pressure edges into the region, but the upper-level trough can make it unsettled again here later in the week before potential clearing for the weekend.
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The weakened remains of Tropical Storm Ophelia will drift only slowly away from the area during the next couple of days and we’ll continue to experience cool, damp conditions with occasional light rain or drizzle. High pressure builds across southeastern Canada at mid-week and this will result in the return of some sunshine along with continued cool weather conditions, but another upper-level trough makes it somewhat unsettled here late in the week.
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An intensifying storm system over the southwestern Atlantic Ocean will be quite impactful during the next couple of days all the way from the Carolinas to Long Island. Heavy rain, powerful winds, beach erosion and coastal flooding are all on the table from this storm as it pushes in a general north-to-northwest direction during the next couple of days and even isolated tornadoes cannot be ruled out. This system will take on tropical characteristics as it heads towards an early Saturday landfall in eastern North Carolina - potentially intensifying into a category 1 hurricane. Later this weekend, as the storm reaches the Chesapeake Bay region, it will slow down and begin a turn from the general northward direction to northeast. It’ll likely then cross the Delaware Bay and heads toward southern New Jersey in a weakened state and its slow pace will result in rainfall across the Mid-Atlantic region all the way into later Sunday.
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