The week starts off with high pressure off the east coast, but still in control of our weather and we’ll have plenty of sunshine today with humid and very warm conditions. After another sunny, hot and humid day on Tuesday, there can be a few showers and thunderstorms around tomorrow night, but an even better chances comes on Wednesday as a cold front arrives. That front will stall out in the general vicinity and we'll be quite unsettled and not as hot for much of the second half of the week.
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The Mid-Atlantic region will continue to experience good drying conditions for the next few days as high pressure dominates the scene in the eastern third of the nation. Temperatures and humidity will remain quite comfortable today, but will creep up this weekend as a southwesterly flow of air develops in the region. There is no extreme heat and humidity in sight, however, like that which we experienced last weekend.
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The Mid-Atlantic region is finally getting an extended stretch of dry weather that should last at least into the early part of next week. Large high pressure is in control and will stay in the control through the weekend though it will shift off the coast on Saturday. Temperatures and humidity will remain quite comfortable into the weekend when they’ll begin to climb, but we’ll have nothing like the conditions of last weekend.
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The Mid-Atlantic region will finally get a break in the action with respect to the very wet weather pattern of recent weeks. Large high pressure will take control of the weather today and it looks like it can stay close enough to give us rain-free conditions right through the upcoming weekend. Temperatures and humidity levels will continue to be quite comfortable for late July as we progress to the weekend. The weekend promises to be quite warm and humidity will creep up, but not at all like the excessive heat and humidity conditions of last weekend.
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A cold front will slowly work its way through the region today and there will be additional shower activity throughout the I-95 corridor. Temperatures will be well below-normal today for late July and much cooler than recent days with highs confined to the 70’s in most spots. High pressure will build into the area for Wednesday and likely stay in control for the rest of the week with generally comfortable conditions.
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The hot weekend weather will transition to below-normal temperatures by tomorrow in the Mid-Atlantic and the adjustment will lead to showers and thunderstorms as a cold front approaches from the Great Lakes. Some of the storms later today and tonight can be strong-to-severe and there can be torrential rainfall with flash flooding. Following the frontal passage, highs on Tuesday and Wednesday will likely be confined to the lower 80’s which is actually below-normal for late July and some 15-20 degrees cooler than the extreme heat of the past weekend. The much more reasonable weather pattern in terms of temperatures will likely last through the remainder of the month of July in the Mid-Atlantic region.
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The next three days will likely be the hottest stretch all summer long in the Mid-Atlantic region with urban areas along Route I-95 likely to make a run at the 100 degree mark (e.g., DCA, PHL, NYC) over the weekend. (Philly Airport hasn’t reached the 100 degree mark in the last 7 years). There is significant relief coming to the Midwest, NE US and Mid-Atlantic region next week and temperatures are quite likely going to be below-normal on Tuesday and Wednesday. The transition from the extreme heat and humidity expected this weekend to the cooler-than-normal conditions next week may very well come with strong-to-severe thunderstorm activity in the Sunday night to early Tuesday time period with more torrential rainfall and potential damaging winds.
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A true summer heat wave will take place over the next three days from the Midwest to the east coast, but significant relief is on the way for next week. The atmospheric blow torch will cause temperatures to soar well up into the 90’s today and then make a run at 100 degrees on Saturday afternoon. Philly Airport hasn't reached the 100 degree mark in 7 years. The end of the 3-day heat wave may come with some strong-to-severe thunderstorm activity on Sunday night and/or Monday. By next Tuesday, temperatures will be below-normal and the overall temperature pattern looks pretty favorable going into at least early August with additional comfortable air masses on the way for the central and eastern US.
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There will be additional showers and thunderstorms today associated with entrenched tropical moisture and some of this rain will be heavy at times. Once this large moisture field pushes away later tonight, an atmospheric blow torch will set up for the Mid-Atlantic region. Temperatures will be somewhat reduced today due to extensive cloud cover, but will soar tomorrow and it’ll stay excessively hot and humid this weekend with a run to 100 degrees possible during this stretch; especially, on Saturday. There can be scattered showers and storms again later Sunday with a weak frontal system and then more showers and storms are likely later Monday as a stronger front arrives. That stronger front will usher in cooler air by next Tuesday when highs are likely to be confined to the 80’s and the remainder of July is looking anywhere from normal to slightly below normal in terms of temperatures.
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There are two big weather stories unfolding for the Mid-Atlantic region for the next few days with the potential of severe thunderstorms and torrential rainfall later today and tonight as the remains of Barry pass through the region and then the hottest weather of the summer so far in the Friday through Sunday time frame. An already very warm and moist atmosphere will get even more unstable later today and tonight as a trough of low pressure associated with what was once tropical cyclone Barry passes through leading to numerous showers and thunderstorms.
Once this large tropical moisture field pushes away from the area, an atmospheric blow torch will setup and cause temperatures to soar on Friday in the I-95 corridor and it’ll stay excessively hot and humid this weekend with a run to 100 degrees possible during this stretch. There can be scattered showers and storms late Sunday with a weak frontal system and then more showers and storms on Monday associated with an even stronger frontal system which will usher in cooler air by next Tuesday. In fact, the remainder of July looks much more pleasant across the eastern half of the nation with normal-to-below normal temperatures and we could very well look back on this Friday-to-Sunday heat wave as the worst of the summer in the Mid-Atlantic region.
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