The shortened work week will begin with very nice weather in the Mid-Atlantic region as high pressure remains in control and results in plenty of sunshine and comfortable conditions. The best chance for showers and thunderstorms over the next few days will come later tomorrow into tomorrow night when a cold front arrives and it could generate some strong storms and brief downpours. Behind the front, the weather will turn out quite nice once again for the latter part of the week and likely during the upcoming weekend as well.
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A stretch of nice weather will continue into next week as high pressure builds into the Mid-Atlantic region. Temperatures will remain in the comfortable zone for the early part of September and slightly below-normal for this time of year. After a dry day on Saturday, a shower or two cannot be ruled out on Sunday with the approach of a weak front.
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In the wake of yesterday's high impact weather event, a stretch of nice weather is in store for the Mid-Atlantic region. Drier and cool air for this time of year has pushed into the Mid-Atlantic region following the movement of “Ida” to the New England coastline. High pressure will build into the area by later tonight and this system will result in nice weather around here right through the upcoming weekend with temperatures staying quite comfortable for early September.
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A significant rain event continues at this time across much of the Mid-Atlantic region associated with the remains of Ida. Flooding has already occurred in some areas as a result of heavy rainfall, strong thunderstorms and already well-saturated grounds. The threat of tornadoes will increase markedly later in the day generally in areas along and to the southeast of the DC-to-Philly-to-Atlantic City corridor. Ida is still classified as a tropical depression and it will likely strengthen some later today as it encounters an upper-level jet streak that is located over the northeastern states.
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*A high impact weather event today and tonight in the Mid-Atlantic region with heavy rainfall, the potential for widespread flooding, and a tornado threat as well*. The remnants of Ida will get “re-invigorated” today as this tropical depression encounters a stalled-out frontal boundary zone and interacts with a strong upper-level jet streak. Flooding is a serious concern for the next 24 hours or so given the already well-saturated grounds and the prospects of several inches of rainfall. Cool air for early September will follow the storm for Thursday, Friday and Saturday confining afternoon highs to the 70’s in most spots.
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Ida has been downgraded to a tropical depression, but its impact is far from over. A heavy rain and flooding event is coming to the Mid-Atlantic region on Wednesday and Wednesday night and there is a severe weather threat as well to include the possibility of tornadoes. The axis of heaviest rainfall may set up just to the north and west of the I-95 corridor and the greatest chance of severe weather may be just to the south and east of there. The remnants of Ida will get “re-invigorated” later tomorrow as it encounters a stalled-out frontal boundary zone and interacts with a strong upper-level jet streak.
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A heavy rain and flooding event is likely for the region from Wednesday into early Thursday. The remnants of Ida will push into the Mid-Atlantic region on Wednesday and its associated rainfall shield will actually tend to become “re-invigorated” and broaden out as it encounters a stalled-out frontal boundary zone and an upper-level jet streak. A general 2-4 inch rainfall is likely in the NYC metro region from later tomorrow into early Thursday and isolated higher amounts of up to 6 inches are even possible. Thunderstorms can mix into the picture and - as is somewhat customary with tropical systems in the middle latitudes - isolated tornadoes will be a threat to the east of the storm track. The greatest threat for severe weather during this storm will take place across southern and central New Jersey. Cool air for the beginning of September will follow the departure of the tropical storm with highs in the late week and early this weekend confined to the 70’s in much of the NYC metro region.
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Hurricane Ida came ashore on Sunday in southern Louisiana as a strong category 4 storm following rapid intensification in the prior 24 hour period. Substantial rain fell yesterday and last night in the Gulf coastal region and damaging wind gusts knocked out power for over a million people as of earlier today including all of New Orleans. Ida has been downgraded to a tropical storm, but its impact is far from over.
A major rain event associated with the remnants of Ida is coming first to the Tennessee and Ohio Valleys and then to the Mid-Atlantic region and Northeast US from later Wednesday into early Thursday. In fact, there will be a tendency for the tropical system to be “re-invigorated” in the Mid-Atlantic region as it interacts with an upper-level jet and a stalled-out frontal boundary zone. A swath of significant rainfall amounts of up to several inches will take place during the next 72 hours all along the post-landfall track of Ida extending from the southern states to the Northeast US and flooding will be a big concern all along the path. In addition to the heavy rain threat, severe weather will be on the table including the possibility of tornadic activity on the eastern side of the storm track.
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“Major” Hurricane Ida slammed into Louisiana on Sunday as a category 4 storm and the remnants will move slowly to the north today and then to the northeast over the next couple of days. A stalling frontal system will generate scattered showers and thunderstorms later today and tonight in the Mid-Atlantic region and then will act as a pathway for Ida’s tremendous levels of moisture to push in here at mid-week. Significant rainfall will push into the Tennessee Valley over the next 24 hours and then reach the Mid-Atlantic region and Northeast US from later Wednesday to early Thursday. Rainfall amounts of up to several inches is possible in the Mid-Atlantic region and given the already well saturated grounds, flash flooding is a strong likelihood in many areas. Cooler, drier air pushes in for the late week on the heels of the mid-week tropical rainfall event with highs generally confined to the 70’s.
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Hurricane Ida is making a run at Category 5 status in the remaining few hours before landfall along the southeastern Louisiana coastline. The latest observations of Ida include a well-defined eye, max sustained winds at 150 mph after rapid intensification of this system in the past 24 hours, and a northwest movement towards the Louisiana coastline. After landfall later today, Hurricane Ida will remain quite strong as it moves inland and it will gradually turn to the north in the nighttime hours and then take a turn to the northeast by mid-week. The post-landfall track will bring significant rainfall to the Tennessee Valley and then to the Mid-Atlantic region/Northeast US in the Wednesday/Thursday time period.
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