Our recent stretch of nice weather with generally rain-free conditions and comfortable temperatures and humidity levels is coming to an end. High pressure that has been to our north in recent days has shifted off the east coast and this new positioning has opened the door for more humid air to push into the region. In addition, an upper-level disturbance that has been spinning over the Carolinas in recent days is now making a move to the north and this combined with the higher humidity has increased our chances for showers and thunderstorms. Indeed, this threat of rain will stick around not only for the rest of the work week, but also for the weekend and at least the first half of next week. The rain chances over the next several days will be highest during the afternoon and evening hours as it will tend to be “diurnally-driven” with daytime heating playing an important catalyst type of role. Another strong upper-level low pressure system may impact our region by the latter part of next week.
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There is a surface low pressure system this morning near the Outer Banks of North Carolina and satellite imagery clearly shows an upper-level low spinning over the central part of the same state. This upper-level has resulted in substantial rainfall in recent days across the Carolinas and westward to West Virginia and southwestern Virginia and it is about to finally make a move to the next. As a result of this movement, showers will move into the DC metro region later today and likely edge into Philly later tonight or early Thursday and once the threat of rain arrives, it’ll likely stick around all the way into next week. In fact, another significant upper-level trough of low pressure is likely to push into the Great Lakes/Mid-Atlantic/NE US by the middle of next week and this will more than likely continue the wet pattern that is unfolding for this part of the nation.
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High pressure that has been to our north in recent days will shift off the east coast over the next 24 hours and this shift in location will open the door for warmer and more humid air to push in our direction for the latter part of the week. In addition, there will be a renewed threat of showers here by the end of the work week and that threat of rain is likely to last into next week and thunderstorms can mix into the picture as well.
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High pressure to our north continues to control the weather around here and it’ll produce another couple of comfortable days in the region. This system will push off the coast on Wednesday and this shift in location will open the door for warmer, more humid air for the latter part of the week and an increased chance of showers and thunderstorms. The threat for rain looks like it’ll return here in earnest by the late week and it could last through the upcoming weekend on the backside of the soon-to-depart high pressure system.
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High pressure to our north will control the weather around here through mid-week and it’ll stay quite comfortable for a couple more days. The high pressure system will shift off the coast at mid-week and this will begin a warm up for the second half of the week. Temperatures should hold in the 70’s for highs for the next couple of days, but then reach 80 degrees at mid-week and well up into the 80’s by late in the week.
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A cooler-than-normal air mass will push into the region early this weekend resulting in very comfortable temperatures for the weekend and also for the first half of next week. While there will be plenty of sunshine during the weekend and the early part of next week, the atmosphere will become somewhat unsettled given the unusually cool air aloft and this can result in a shower from time-to-time. High pressure to our north will be the main player this weekend and early next week and there will be an upper-level trough slowly dropping southward into the Carolinas.
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A slow-moving cool front will bring us occasional showers today and there can be a strong thunderstorm mixed in as well. A cooler-than-normal air mass will push into the region early this weekend resulting in comfortable temperatures for the weekend and the first half of next week. The atmosphere will become increasingly unsettled, however, with the combination of cool air aloft and a slow-moving upper-level trough moving in overhead. Showers cannot be ruled out later Saturday and there is a likelihood for showers on Sunday, Monday and perhaps Tuesday as well.
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Low pressure over the Great Lakes region will intensify today and a trailing cold front will approach our area from the northwest. The approach of the front will increase the chance of showers and thunderstorms around here by tonight and it'll keep it unsettled on Thursday as it drags very slowly through the region. A cooler-than-normal air mass will push into the region early this weekend resulting in more comfortable weather conditions on Saturday and Sunday and the cooler-than-normal weather will stick around into the early part of next week. With cooler air aloft, the weekend and early part of next week will become somewhat unsettled and showers will likely be a threat on Saturday, Sunday and Monday.
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High pressure will push off the coast today and this will allow for much warmer air to move into the Mid-Atlantic region from the southern states. A frontal system will approach the area late Wednesday and increase the chance of showers and thunderstorms and then this same front will stall out in the area and weaken later in the week. Another frontal system will follow early this weekend and it can bring us a chance of showers and thunderstorms on either weekend day.
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A “derecho” is defined as a widespread, long-lived wind storm associated with bands of quickly moving showers and thunderstorms. Although a “derecho” can produce destruction similar to that of a tornado, the damage typically occurs in one direction along a relatively straight path. By definition, if the extent of wind damage is for more than 250 miles, includes wind gusts of at least 58 mph along its path, and also includes several, well-separated wind gusts of 75 mph or greater, then the event may be classified as a “derecho”. One such event took place last Wednesday, June 3rd, across much of Pennsylvania and New Jersey - and some are still feeling the impact.
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