There were some records tied or broken on Monday and a few spots reached the century mark; however, the peak of this current hot spell comes today with numerous 100-degree readings likely all along the DC-to-Boston corridor. In fact, it is possible that 100-degree readings are experienced later today in each state all the way from Maine-to-Florida. In Philadelphia on Monday, temperatures reached 99 degrees which broke the record for the date set just one year ago, and 100 degrees is certainly on the table for this afternoon which would be the first at “PHL” since July of 2012.
There is relief in sight for the Mid-Atlantic region and Northeast US and, in some cases, there can be a dramatic drop in temperatures following the passage of a back door cool front. The overall weather pattern becomes unsettled as well with the chance of showers and thunderstorms returning on Wednesday afternoon and then increasing on Thursday...any thunderstorm that forms on either day can be strong-to-severe. Looking ahead to next week, overall temperatures look quite reasonable for much of the eastern half of the nation as the calendar transitions from June to July.
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Yesterday featured high temperatures near the 100 degree mark in many locations along the DC-to-Philly-to-NYC corridor with a record-breaking 99 degrees recorded at Philly International Airport (PHL). The bad news with respect to this current hot spell is that the peak may actually come later today with numerous 100 degree readings on the table in the I-95 corridor compared to Monday. The good news is that much relief is in sight by the end of the work week on Friday and next week looks much closer-to-normal in terms of overall temperatures.
The last time Philadelphia officially reached 100 degrees at the International Airport (PHL) was on July 18th, 2012…and it could happen again later today. The very strong ridge of high pressure to our north will weaken later in the week and also shift southward. As a result, the heat will not be as intense here on Wednesday and there will be a chance of PM showers and thunderstorms. Temperatures drop even further on Thursday as a back door cool front approaches the region and the chance of showers and thunderstorms will increase. Any thunderstorm that forms on both Wednesday and Thursday can be strong-to-severe. This back door cool front could actually bring much relief by Friday as an ocean flow of air could develop and end the work week on a cool note.
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High heat and humidity will be the rule for the next few days in the Mid-Atlantic region with very strong high pressure ridging in control. Temperatures will climb right through the 90’s on Monday and Tuesday and flirt with the 100-degree mark in some locations. The last time Philadelphia officially reached 100 degrees at the International Airport (PHL) was on July 18th, 2012. The strong ridge tends to weaken later in the weak - beginning on its northern perimeter - and this should lead to afternoon and evening showers and thunderstorms around here beginning at mid-week and that threat of PM rain likely lasts right through the weekend. There will be a reduction in temperatures later in the week as the ridge breaks down such that we’ll likely be back in the lower 80’s for highs by week’s end.
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Powerful thunderstorms barreled through the DC-to-Philly-to-NYC corridor late yesterday causing widespread damaging wind reports and power outages (e.g., ~250,000 customers without power in SE PA). The passage of the surface cold front has lead the way to noticeably lower humidity today in the Mid-Atlantic region and there will be plenty of sunshine to go along with warm conditions.
The moderate humidity of today will give way to an extended stretch of high heat and humidity from later this weekend into at least the middle of next week. A very strong ridge of high pressure that has been stuck out west in recent days will move into the eastern states by later this weekend. This repositioning of the strong upper-level ridge will lead to high temperatures well up in the 90’s for multiple days all along the DC-to-Philly-to-NYC corridor...perhaps some spots can reach the 100-degree mark during this stretch. One final note, there is a good chance for a complex of thunderstorms to drop southeastward across New York State and New England later this weekend and there is a slight chance it could produce a shower or thunderstorm in the Philly metro region on Sunday.
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Many ingredients are coming together to raise the chance of severe weather later this afternoon and evening in the Mid-Atlantic region. A strong surface cold front, high heat and humidity, and an impressive upper-level disturbance will help to destabilize the atmosphere this afternoon and there are likely to be strong-to-severe thunderstorms impacting the I-95 corridor somewhere between 2pm and 8pm. The cold front clears the coast by late tonight and Friday will turn out to be a less humid day featuring plenty of sunshine and warm conditions.
The moderate humidity expected on Friday will give way to an extended stretch of high heat and humidity in the Mid-Atlantic region from later this weekend into at least the middle of next week. A very strong ridge of high pressure will build into the eastern states, and this will lead to high temperatures well up in the 90’s for multiple days all along the DC-to-Philly-to-NYC corridor.
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The atmosphere will become quite unstable later today with the approach of a surface cold frontal system combined with a disturbance in the upper part of the atmosphere. As a result, the chance for afternoon and evening showers and thunderstorms will be high and any thunderstorm that forms can be severe with heavy rain and damaging wind gusts. There is also that chance in this expected thunderstorm activity for large hail and isolated tornadoes cannot be ruled out. Temperatures today will climb to uncomfortably warm levels near 90 degrees and the humidity will be a very noticeable factor as well.
After a sunny and warm day to end the work week, very strong high pressure ridging in the upper part of the atmosphere will push eastward this weekend. This system will end up directly overhead in the Mid-Atlantic/Northeast US by the early part of next week and likely stay put until at least the middle of next week. As a result, high heat and humidity is on the way for an extended period of time from later this weekend into at least the middle of next week.
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It has become uncomfortably humid and warm today across much of the Mid-Atlantic region following the progression of a warm frontal system that is pushing slowly to the north. This change in atmospheric conditions comes following a cool stretch of weather that featured high temperatures on Sunday, Monday, and Tuesday that were well below-normal for the middle of June. The atmosphere will quickly destabilize this afternoon and there are likely to be downpours and strong-to-severe thunderstorms impacting the I-95 corridor somewhere between 1pm and 8pm.
A surface cold frontal system will approach the Mid-Atlantic region from the northwest on Thursday, and this will combine with an upper-air disturbance to bring another threat of severe weather threat to the DC-to-Philly-to-NYC corridor. The likely timetable for severe thunderstorm activity on Thursday will again be 1pm-8pm, and there can be damaging wind gusts, hail, and even isolated tornadoes in any spot along the I-95 corridor. The cold front clears the coast by later tomorrow night and Friday will turn out to be a rather decent day featuring warm and dry conditions to end the work week.
Looking ahead, a very strong ridge of high pressure will build into the Mid-Atlantic region by the early part of next week and this will lead to high heat and humidity in the DC-to-Philly-to-NYC corridor from later this weekend into at least the middle of next week. After a very warm day on Saturday, temperatures are likely to soar into the 90’s on Sunday and then the first half of next week will feature high heat and humidity and 100 degrees will be a possibility in the DC-to-Philly-to-NYC corridor.
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After a cool start to the week, it’ll turn much warmer for today and Thursday in the Mid-Atlantic region and humidity will be a noticeable factor as well. The warm-up comes ahead of a strong frontal system which can produce strong-to-severe thunderstorms around here this afternoon and then additional strong-to-severe thunderstorms are likely later tomorrow.
After a sunny and warm day to end the work week, very strong high pressure ridging in the upper part of the atmosphere will push eastward this weekend. This system will end up directly overhead in the Mid-Atlantic/Northeast US by the early part of next week and likely stay put until at least the middle of next week. As a result, high heat and humidity is on the way for the northeastern states in the period from later this weekend into the middle of next week and 100-degrees is on the table.
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There is a lot going on in the world of weather across the nation with severe weather threats each of the next few days and scorching heat is on the horizon for the Great Lakes, Mid-Atlantic, and Northeast US. In the near-term, severe weather will be a major concern today in the nation’s mid-section (Kansas, Oklahoma, Nebraska) and then that threat zone will shift eastward on Wednesday to the Mississippi and Ohio Valleys, and then to the eastern states on Thursday.
In terms of temperatures, there has been unusually cool weather across the northeastern part of the nation during the past few days and it continues today…this will be just a fond memory in a week’s time as sweltering heat is on the way. Actually, temperatures will surge to much warmer levels on Wednesday and Thursday, but the intense and more sustained heat is coming for the period from later this weekend into at least the middle of next week and 100-degree highs are possible all along the DC-to-Boston corridor.
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After a cool start to the week, it’ll turn slightly warmer today and then uncomfortably warm and humid for Wednesday and Thursday with highs in the 90’s on the table by Thursday afternoon. The warm-up at mid-week comes ahead of a strong cold front and both Wednesday and Thursday can feature strong-to-severe thunderstorms during the PM hours.
After backing off a tad on Friday, temperatures will surge around here from later this weekend through the middle of next week with a run to 100 degrees possible in the big cities all along the DC-to-Boston corridor. Very strong upper-level ridging which has been largely confined to the western states in recent days will push to a position centered over the eastern states by early next week and temperatures will respond in a dramatic fashion.
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