The very strong upper-level ridge of high pressure that has been parked overhead during the past few days is now weakening and shifting to the south. At the same time, surface high pressure has built into southeastern Canada and this combination has resulted in the formation of a back door cool front across northern New England which will push southwestward during the next 24 hours to a position in the southern Mid-Atlantic by late Friday. As a result, temperatures will be remain hot here, but then it’ll turn cooler on Friday as a low-level ocean flow of air develops behind the front (i.e., east-to-northeast winds).
There can be showers and thunderstorms from today into tomorrow during this temperature transition period and any storm that forms can be strong-to-severe. The back door cool front will then turn around on Saturday and push back to the north as a warm front resulting in quite warm and humid conditions on both Saturday and Sunday. There will be the chance of showers and thunderstorms on both weekend days, but neither should be a total washout.
Read More
The very strong upper-level ridge of high pressure that has been parked overhead during the past few days is now weakening and shifting to the south. At the same time, surface high pressure has built into southeastern Canada and this combination has resulted in the formation of a back door cool front across northern New England which will push southwestward during the next 24 hours to a position in the southern Mid-Atlantic by late Friday. As a result, temperatures will be much reduced here today compared to the recent high heat and then it’ll turn even cooler on Friday as a low-level ocean flow of air develops behind the front (i.e., east-to-northeast winds).
There can be showers and thunderstorms from today into tomorrow during this temperature transition period and any storm that forms can be strong-to-severe. The back door cool front will then turn around on Saturday and push back to the north as a warm front resulting in quite warm and humid conditions on both Saturday and Sunday. There will be the chance of showers and thunderstorms on both weekend days, but neither should be a total washout.
Read More
The very strong upper-level ridge of high pressure that has been parked overhead during the past few days is now weakening and shifting to the south. At the same time, surface high pressure has built into southeastern Canada and this combination has resulted in the formation of a back door cool front across northern New England which will push southwestward during the next 24 hours to a position in the southern Mid-Atlantic by late Friday. As a result, temperatures will be reduced here today compared to the recent high heat and then it’ll turn even cooler on Friday as a low-level ocean flow of air develops behind the front (i.e., east-to-northeast winds).
There can be showers and thunderstorms from today into tomorrow during this temperature transition period and any storm that forms can be strong-to-severe. The back door cool front will then turn around on Saturday and push back to the north as a warm front resulting in quite warm and humid conditions on both Saturday and Sunday. There will be the chance of showers and thunderstorms on both weekend days, but neither should be a total washout.
Read More
The pattern turns warmer and drier for the Thursday to Sunday time period and afternoon highs are likely to be back into the lower 90’s for Friday and Saturday. In terms of precipitation, any shower or thunderstorm activity during the next few days should be limited to late day and only isolated in the region.
Read More
Today will feature high heat and humidity once again in the Mid-Atlantic region and high temperature records for the date are likely to be set in many locations. There is relief on the way, however, thanks to a back door cool front that will push southwestward from northern New England during the next couple of days. Temperatures will be much reduced in the Mid-Atlantic region by Friday afternoon as an ocean flow of air (east-to-northwest winds) develops following the passage of the back door cool front. The transition from today’s high heat and humidity to the cool down at the end of the week will come with scattered showers and thunderstorms and some of the storms can be strong-to-severe.
Read More
The official high temperature yesterday recorded at Reagan National Airport (DCA) was 99 degrees which was just short of the record for the date. The very strong upper-level ridge of high pressure parked overhead during the past couple of days will begin to break down later today and also shift slowly to the south. At the same time, surface high pressure will build across southeastern Canada and the combination of these two systems will allow for the formation of a back door cool front that will push southwestward from northern New England over the next couple of days. As a result, relief is in sight here in terms of temperatures and precipitation chances will be on the rise. There can be isolated shower and thunderstorm activity later today and early tonight and that threat of rain should increase on Thursday. Any storm that forms either late today or on Thursday in the Mid-Atlantic region can reach strong-to-severe levels. Unsettled weather conditions will continue on Friday, Saturday, and Sunday and a look ahead to next week suggests temperatures could be quite reasonable as the calendar shifts from June to July.
Read More
The official high temperature yesterday recorded at Philly International Airport (PHL) was 101 degrees which broke a record for the date and was the first triple-digit reading since July 2012. The very strong upper-level ridge of high pressure parked overhead during the past couple of days will begin to break down later today and also shift slowly to the south. At the same time, surface high pressure will build across southeastern Canada and the combination of these two systems will allow for the formation of a back door cool front that will push southwestward from northern New England over the next couple of days. As a result, relief is in sight here in terms of temperatures (70’s on Friday) and precipitation chances will be on the rise. There can be scattered shower and thunderstorm activity later today and early tonight and that threat of rain should increase some on Thursday. Any storm that forms either late today or on Thursday in the Mid-Atlantic region can reach strong-to-severe levels. Unsettled weather conditions will continue on Friday, Saturday, and Sunday and a look ahead to next week suggests temperatures could be quite reasonable as the calendar shifts from June to July.
Read More
The official high temperature recorded yesterday in Central Park was 99 degrees which was indeed a record for the date. The very strong upper-level ridge of high pressure parked overhead during the past couple of days will begin to break down later today and also shift slowly to the south. At the same time, surface high pressure will build across southeastern Canada and the combination of these two systems will allow for the formation of a back door cool front that will push southwestward from northern New England over the next couple of days. As a result, relief is in sight here in terms of temperatures and precipitation chances will be on the rise. There can be scattered shower and thunderstorm activity later today and early tonight and that threat of rain should increase on Thursday. Any storm that forms either late today or on Thursday in the Mid-Atlantic region can reach strong-to-severe levels. Unsettled weather conditions will continue on Friday, Saturday, and Sunday and a look ahead to next week suggests temperatures could be quite reasonable as the calendar shifts from June to July.
Read More
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.
Read More
Very strong upper-level high pressure ridging remains in place today over the Mid-Atlantic region leading to the high heat and humidity across the southeastern states. This system will gradually as we get to the latter part of the week and the result here will be less extreme heat and the chance for PM showers and thunderstorms will be on the increase.
Read More
