Temperatures will rebound some for the next few days, but it’ll then turn cooler and unsettled for the upcoming weekend. A weak system can bring occasional showers to the area today and then high pressure builds in on Thursday producing comfortable, dry conditions. Low pressure will likely bring a widespread rainfall to the Mid-Atlantic region on Saturday and temperatures will be on the cool side doing no better than the lower 50’s for afternoon highs.
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After a frosty start to the day, temperatures will climb into the low-to-mid 50’s later today boosted by copious amounts of sunshine with high pressure sitting overhead. As is often the case this time of year, chilly air masses won’t stick around for too long and we’ll warm to the lower 60’s on Wednesday and to near 70 degrees for afternoon highs on Thursday. Looking ahead, the weekend appears to be cooler and quite unsettled with an area of low pressure likely impacting the Mid-Atlantic region...there is even the chance for a period of steady rainfall.
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Not quite done yet with the chilly air outbreaks in the Mid-Atlantic region and temperatures late tonight will drop to the upper 20’s with a widespread frost/freeze on the table…protect sensitive plants. Radiational cooling conditions will be excellent tonight allowing temperatures to drop sharply with clear skies and light winds under a dome of high pressure. As is often the case this time of year, chilly air masses won’t stick around for too long…much milder conditions coming for the mid and late week.
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It’ll remain warm today in the Philly metro region, but not quite the extreme of the past couple of days as changes get underway in the overall weather pattern across the eastern states. The big change will take place later this weekend as a strong cold front arrives and this front will likely produce some much-needed rainfall here from later Saturday night into Sunday. In addition, it’ll turn much cooler for Sunday and Monday and temperatures late Monday night/early Tuesday could drop into the lower 30’s...potentially prompting frost and/or freeze advisories to be issued. A quick rebound in temperatures is likely by mid-week, but cooler-than-normal air could return to the northeastern states by the end of next week.
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The unseasonably warm conditions in the Mid-Atlantic region will continue for one more day and many spots today will challenge their daily high temperature record. It’ll remain on the warm side on Friday and Saturday, but not quite the record-challenging warmth experienced here during the past couple of days. The warmer weather pattern breaks down over the weekend as a strong surface cold front heads toward the eastern states at the same time intense high pressure ridging along the coast slides to the east.
The front will bring with it a good chance of much-needed shower activity late Saturday night and Sunday morning and it’ll usher in a much cooler air mass to close out the weekend and start the new work week. In fact, temperatures late Monday night/early Tuesday are likely to drop way down to freezing or below in much of the Mid-Atlantic region which could prompt widespread frost and freeze warnings. Temperatures rebound noticeably by mid-week, but an overall pattern change will bring additional colder-than-normal air masses to the central and eastern states during late April/early May.
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The significant warmup in the Philly metro region will continue for another day with temperatures soaring today to well up into the 80’s and there can be record highs observed in some spots. The unseasonably warm weather pattern will breakdown this weekend with the arrival of a strong cold front on Saturday night. This frontal system will bring with it a good chance of much-needed shower activity in the Mid-Atlantic region on Saturday night and Sunday and it’ll turn much cooler for the early part of next week. In fact, temperatures late Monday night/early Tuesday could drop into the lower 30’s across the area and frost/freeze advisories may be required…a quick rebound in temperatures for the mid-week.
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Our significant warmup continues for the next two days and there can be daily high temperature records set in some areas along the I-95 corridor. A band of showers and thunderstorms developed late yesterday and impacted parts of the area last evening and a repeat performance can take place late today/early tonight. The unseasonably warm weather pattern will begin to breakdown this weekend and a strong cold front will approach the area by Saturday night/Sunday bringing with it a threat of showers. Much cooler air pushes into the northeastern states for the early part of next week and temperatures could drop into the low-to-mid 30’s late Monday night/early Tuesday morning.
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A significant warmup began in the eastern states on Monday and the next few days will feature unseasonably warm conditions in the Mid-Atlantic region with record high temperatures a possibility in some areas. The warmup will last through the work week, but then a strong cold front will approach the east coast by Sunday paving the way for a colder-than-normal air mass to reach the northeastern states by the early part of next week. This may not be the end of the chillier air masses as signs point to additional outbreaks from Canada as we progress to the last week of April.
In terms of (much needed) rainfall, a complex of showers and thunderstorms developed in the overnight hours over the Great Lakes and some of this activity can re-develop later today in the Mid-Atlantic region; primarily, on the north side of the PA/MD border.
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Most have been waiting for this kind of warmup in the eastern states following several false starts this season, but this may end up being a little too much on the extreme side. Not only are daily high temperature records in jeopardy this week in the Mid-Atlantic region with 90+ degrees on the table, but a few spots could experience their highest April temperatures ever recorded although it will be tough to beat the heat wave of April 1976. This warmup should last well into the upcoming weekend, but there are strong signs that another chilly air outbreak is destined to reach the northeastern part of the country by early next week. In fact, there are signs that additional colder-than-normal air masses will impact the central and eastern states during the last week of April at the same time a teleconnection index known as the Madden-Julian Oscillation or MJO shifts into a colder-than-normal phase for this time of year.
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Record breaking warmth possible this week…
A significant warmup is coming to the eastern states this week with temperatures climbing to near 80 degrees around here today and then well up in the 80’s on Tuesday, Wednesday, and Thursday…even 90 degrees is on the table. The weather pattern has been quite dry in recent days across the eastern US and that trend looks to continue this week with minimal chances of any decent rainfall and just the chance of a shower from time-to-time.
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