Labor Day is still two weeks away and that puts this outlook in the “speculation” phase; however, there are interesting and somewhat consistent signs of an “omega” blocking pattern in the upper atmosphere over North America which is more typical of winter or spring seasons. An “omega” blocking pattern typically features an upper-level ridge sandwiched in between two upper-level troughs and these systems tend to linger for several days. If indeed this pattern unfolds with an upper-level trough centered over the Northeast US, then any chance for sustained heat for summer’s unofficial end would be quite low in that part of the nation. However, if the ridge sets up over the Northeast US then 90+ degree heat would certainly remain on the table in those urban areas along the I-95 corridor.
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Following the passage of a cold front, a more comfortable air mass has pushed into the Mid-Atlantic region, but it doesn’t come completely on the dry side. There is a band of showers currently sweeping across northern MD and southern PA which could result in an isolated shower across some of the far northern suburbs of DC early in the day. Temperatures should peak later today in the upper 70’s and climb to the low-to-mid 80’s at mid-week with relatively comfortable humidity levels. The combination of a warm and cold front later this week will bring more unsettled weather back to the Mid-Atlantic.
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The overall unsettled weather pattern in the Mid-Atlantic region did not end with yesterday’s showers and thunderstorms. After a pleasant Friday, yet another wave of energy aloft will push south and east into the Mid-Atlantic region on Saturday raising the chance of showers and thunderstorms from late tonight through Saturday and some of the rain can be heavy. As far temperatures are concerned, it looks like there will be no sustained high heat as we wind down the month of August and some comfortable days in the Mid-Atlantic region.
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Our active weather pattern in the Mid-Atlantic region continues for the next several days with multiple chances of heavy showers and severe thunderstorms that can produce damaging wind gusts and even isolated tornadoes. In a similar pattern to recent severe weather outbreaks, a strong wave of energy will drop southeastward into the Mid-Atlantic region later today riding along a northwesterly flow of air on the peripheral of strong high pressure centered over the western states.
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A cold front will approach the region later today and it’ll help to increase the chance of afternoon and evening showers and thunderstorms…some of the rain later today can be heavy at times and some of the thunderstorms can be severe with damaging wind gusts. It’ll continue to be unsettled from later Friday into Saturday with additional chances of showers and thunderstorms for the Mid-Atlantic region.
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High pressure will remain in control of the weather around here today, but then it becomes unsettled again later tomorrow with the arrival of another cold frontal system This next cold front should produce an increasing chance of showers and thunderstorms for Thursday afternoon and evening and it’ll likely remain somewhat unsettled for Friday and Saturday as well.
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A weak cold front will inch its way across the region today and there can be an isolated PM shower or thunderstorm before high pressure takes control for the mid-week time frame. Another frontal system approaches the area on Thursday and it will produce a good chance of afternoon and evening showers and thunderstorms…stays somewhat unsettled for the late week and upcoming weekend.
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Low pressure over the Great Lakes will push to the northeast today and drag a cold front through the area leading to somewhat unsettled weather conditions. High pressure will take control of our weather by tomorrow and it looks relatively quiet on Tuesday and Wednesday with plenty of sunshine each day and moderately warm conditions. Another frontal system will return unsettled weather conditions to the region later in the week and there will be a renewed chance of showers and thunderstorms.
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A cold front will push just to the south of here later today leading to improving weather conditions and the weekend should start off on a comfortable note with moderate humidity levels. The low-level wind flow will change on Sunday allowing for more moisture to push back into the area and the next upper-level system will head in this direction. The combination of the increasing moisture and approaching wave of energy will create an increasing chance of showers and thunderstorms on Sunday and the threat of rain can carry into Monday as well.
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A cold front will gradually sag to the south of here during the next 24 hours or so leading to improving weather conditions on Friday and a comfortable day on Saturday with moderate humidity levels. The second half of the weekend starts off rather comfortable; however, the low-level wind pattern will change allowing for more moisture to move into the Mid-Atlantic region and there will be an increasing chance of showers and thunderstorms.
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