A cold front passed through the region last night, but will linger off the coast for awhile and create some unsettled conditions across the Mid-Atlantic for the next few days. As a result, clouds will be rather plentiful on Friday, Saturday and Sunday and a few showers cannot be ruled out on each day. Strong high pressure will build into southeastern Canada early next week and we’ll have to monitor the movement of tropical systems over the western Atlantic for potential impact along the east coast.
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The Atlantic Basin is quite active with three tropical systems of note as we head towards the end of September. There is a newly named Tropical Storm Humberto situated to the northeast of the Northern Leeward Islands, a likely-to-be named Imelda which is now located near the Dominican Republic, and a weakening Hurricane Gabrielle in the far eastern Atlantic Ocean. It is the likely-to-be named Imelda that may be of most concern at this point as it could threaten the Bahamas this weekend and potentially has a chance of impacting the Southeast US.
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Low pressure has developed in the Ohio Valley and it will push northeastward to New England during the next 24 hours or so riding along a stalled-out frontal boundary zone. The combination of the low pressure system and front will bring numerous showers and thunderstorms to the Mid-Atlantic region through tonight…some of the rain will be heavy and some of the storms can be strong-to-severe. The weather remains somewhat unsettled for Friday and the upcoming weekend with the chance of a few showers on each day.
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The Atlantic Basin is quite active as we head towards the end of September with three tropical systems currently on the playing field including a “major” Hurricane Gabrielle which is now racing off to the east-northeast and is no threat to the US. In fact, Hurricane Gabrielle could impact the Azores Islands and Portugal down the road in a weakened state after crossing over the cooler waters of the North Atlantic.
Meanwhile, the other two tropical systems pose more of a challenge in terms of forecasting their eventual paths and magnitudes. It appears quite likely that both systems will reach named tropical storm classification and potentially, both may climb to hurricane status. It also appears quite likely that these two systems will end up doing some sort of a dance around each other for awhile (“Fujiwhara effect”) and at least one may come uncomfortably close to the US east coast and we may not know the end of the story until we get ten or so days out from now.
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A cold frontal system will inch its way across the region today and stall out just to our south before pushing back to the north later tomorrow as a warm front. Low pressure will develop in the Ohio Valley on Thursday and push towards the northeastern states riding along the frontal boundary zone. Another cold front slides through at week’s end to be followed by high pressure which will gradually build back into the region during the upcoming weekend.
As a result of this combination of fronts and low pressure systems, more rain is coming to the DC-to-Philly-to-NYC corridor and this looks like a soaking rain event with an inch or more on the table. Scattered showers and thunderstorms are likely later today and then numerous showers and thunderstorms are on the way for later tonight, tomorrow and tomorrow night. There can be a few lingering showers on Friday and Saturday with plenty of clouds around and it should be generally dry on Sunday and Monday (one caveat on the expected generally dry conditions on Sunday and Monday…we will need to keep our eyes on a couple of tropical systems that should be over the western Atlantic this weekend).
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A cold frontal system will inch its way across the region today and stall out just to our south before pushing back to the north later tomorrow as a warm front. Low pressure will develop in the Ohio Valley on Thursday and push towards the northeastern states riding along the frontal boundary zone. Another cold front slides through at week’s end to be followed by high pressure which will gradually build back into the region during the upcoming weekend.
As a result of this combination of fronts and low pressure systems, more rain is coming to the DC-to-Philly-to-NYC corridor and this looks like a soaking rain event with an inch or more on the table. Scattered showers and thunderstorms are likely later today and then numerous showers and thunderstorms are on the way for later tonight, tomorrow and tomorrow night. There can be a few lingering showers on Friday and Saturday with plenty of clouds around and it should be dry on Sunday and Monday (one caveat on the expected dry conditions on Sunday and Monday…we will need to keep our eyes on a couple of tropical systems that should be over the western Atlantic this weekend).
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After a dry weekend with high pressure in control, the weather turns much more unsettled this week with multiple chances for rain. A warm front will advance northward through the area later tonight and then a cold front approaches later tomorrow. This combination will increase the chances for some afternoon and evening shower activity on Tuesday and a couple of thunderstorms can mix into the picture. The cold front slides just to the south of here at mid-week and stalls out with low pressure likely to form along its boundary zone. As a result, additional showers are likely here from Wednesday night into Friday with embedded thunderstorms possible as well. The rainfall during the second half of the week could turn out to be a beneficial soaking event.
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A cold front will cross the area tonight and pave the way for a dry, comfortably cool weekend in the Mid-Atlantic region. The big player on the field this weekend on the heels of the frontal passage will be a strong high pressure system located over southeastern Canada. This system will produce an onshore flow of air in the Mid-Atlantic region keeping a lid on temperatures as we progress through the weekend. This high pressure will push off the coast early next week opening the door for the chance of showers by Tuesday.
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Low pressure that has been near the Mid-Atlantic coastline during the past couple of days will weaken today and push off to our northeast. A cold frontal system will cross the area on Friday and strong high pressure will build into southeastern Canada as we head into the weekend. This high will control the weather in the Mid-Atlantic region for the weekend with comfortably cool conditions and plenty of sunshine on both days.
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Coastal low pressure will continue to produce cool, breezy conditions in the region today along with occasional showers and a possible thunderstorm. This system weakens substantially by later tonight and pulls off to the northeast of here allowing for high pressure to our north to resume control of the weather again for the late week and upcoming weekend. After a warm end to the work week on Friday, temperatures will become quite comfortable again on Saturday and Sunday with strong high pressure centered over the southeastern part of Canada.
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