A cold front crossed the region late yesterday and its passage has ushered into the Mid-Atlantic region a much more comfortable air mass that’ll feature daytime highs in the 70’s during the next few days and overnight lows in the low-to-mid 50’s. This early taste of fall will be sponsored by Canadian-born strong high pressure that will be stationed over the northeastern part of the nation during the remainder of the work week.
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A taste of fall is coming to the Mid-Atlantic region for the Tuesday, Wednesday, and Thursday time period following the passage of a cold front later today. That frontal system will produce scattered showers and thunderstorms this afternoon and evening and some of the storms can be on the strong side. Temperatures for the next few days should peak in the 70’s for afternoon highs all along the DC-to-Philly-to-NYC corridor which is well below-normal for this time of year. Temperatures in the overnight hours will bottom in the lower 50’s in much of the I-95 corridor – coolest so far this season – and some spots could bottom out in the upper 40’s well to the northwest of the big cities.
Elsewhere, Ernesto has intensified slightly during the morning hours over the North Atlantic with latest observations showing 90 mph maximum sustained winds. This classifies Ernesto as a strong category 1 hurricane which is somewhat unusual in that it weakened to tropical storm status on Sunday after passing by the island of Bermuda. Ernesto will rush past Newfoundland later tonight and then it can very well impact Ireland/United Kingdom later in the week as an extratropical storm.
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A cold front crosses the region later today and can bring with it more in the way of scattered shower and thunderstorm activity. Some of the afternoon and evening storms can be strong, but much of the time today will be rain-free. Following the passage of the cold front, a cooler and crisp air mass arrives for Tuesday, Wednesday, and Thursday bringing a touch of fall to the area. Daytime highs during this stretch will be generally confined to the 70’s - well below-normal for this time of year - and overnight lows well down in the 50’s.
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High pressure that has been in control of our weather for much of this week has now shifted off the coast and this repositioning will open the door to more humid air and the return of shower and thunderstorm activity. The shower and thunderstorm activity can begin late tonight and should continue on an occasional basis on both weekend days and some of the rain can be heavy at times. Temperatures will climb to quite warm levels later this afternoon with highs in the upper 80's, but they should be confined to the lower 80’s on Saturday and Sunday largely as a result of the expected copious amounts of clouds. A cold front that will be trailing low pressure to our north this weekend will push through here later Monday and it’ll usher in a beautiful air mass for Tuesday and Wednesday of next week with comfortable temperatures and humidity levels.
Elsewhere, Hurricane Ernesto will impact Bermuda on Saturday and then likely maintain hurricane strength for awhile later in the weekend as it pushes towards the Atlantic Canada. While the center of Ernesto will be well to the east this weekend, there can be rough surf and rip tides up and down the east coast on both weekend days.
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High pressure will shift offshore from later tonight into Friday and this repositioning will open the door to influence here this weekend by a low pressure system and its associated frontal systems. As a result, the chance of showers and thunderstorms will increase late tomorrow night and rain will be a threat on both weekend days…some of the weekend rain can be heavy at times. The cold front trailing from the low pressure system will push across the region from Sunday night into Monday likely resulting in additional showers and thunderstorms and, at the same time, Hurricane Ernesto will pass by well to our east producing rough surf/rip tides in the Atlantic. A very comfortable air mass arrives in the Mid-Atlantic region in time for Tuesday and Wednesday of next week.
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High pressure is to remain in control of the weather around here for the next couple of days with relatively comfortable temperatures and humidity levels and also plenty of sunshine on a daily basis. The weather becomes much more unsettled by the end of the week as low pressure and its associated frontal systems raise the chance here for showers and thunderstorms on Friday night, Saturday, and Sunday.
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High pressure is to remain in control of the weather around here for the next few days with overall comfortable conditions and plenty of sunshine on a daily basis. The weather becomes much more unsettled by the weekend as low pressure and its associated frontal systems raise the chances for showers and thunderstorms to return to the Mid-Atlantic region.
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The weekend just past in the Mid-Atlantic region was quite comfortable with plenty of sunshine on both days and the remainder of the week ahead looks quite comfortable as well for the middle of August. In fact, the rest of August may very well turn out to be quite comfortable across the Mid-Atlantic region with no signs of sustained extreme heat pretty much anywhere in the eastern half of the nation.
While the weather is quiet in the Mid-Atlantic region for much of this week, the tropical scene in the Atlantic Basin is active and it is likely to stay quite active during the remainder of August. A strong tropical wave that is currently closing in on the Leeward Islands is very likely to become a named tropical storm (Ernesto) during the next 24 hours and then it’ll impact Puerto Rico by mid-week – perhaps as a category 1 hurricane – and then likely move towards the island of Bermuda as an even stronger hurricane. A second tropical wave follows close behind and is currently located over the central tropical Atlantic and a third can be seen on satellite imagery near the west coast of Africa.
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After a nice weekend in the Mid-Atlantic region, the weather for much of the upcoming week will remain on the quiet, comfortably warm side with high pressure to our northwest staying in control. Temperatures can peak this afternoon in the low-to-mid 80’s and then climb a bit to the middle 80’s for highs for the mid and late week time periods.
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A tropical depression will pass well to the west of here around mid-day bringing additional heavy showers, embedded thunderstorms, more flooding potential, and strong winds through the evening hours…isolated tornadoes are also on the table. Scattered power outages are possible given the combination of saturated grounds and wind gusts potentially up to 45 mph or so. The tropical system will continue its acceleration to the north-northeast that began late yesterday and, as such, will clear out of here by late tonight leading to big improvement on Saturday and also nice weather on Sunday. In fact, the nice weather that begins here early this weekend should continue right into the middle part of next week.
On another note, the annual Perseid meteor shower will peak late this Sunday night and early Monday morning and weather conditions should be quite favorable for viewing. For more details on the meteor shower, check out the blog here.
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