The weather has been rather tranquil during the past few days in the Mid-Atlantic region and Northeast US following a very active extended stretch that included numerous heavy rain and strong thunderstorm events. The calm may be just about to wind down for the northeastern quadrant of the nation. A cold front will push through the Northeast US on Friday and it is likely to increase the chances of showers and thunderstorms. Some of the rain later Friday can be heavy at times and some of the storms can reach strong-to-severe levels. An even more impressive system will cross the Great Lakes from late Sunday into late Monday and it could produce another batch of heavy showers and severe thunderstorms in the Mid-Atlantic/Northeast US.
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High pressure will move offshore today and a couple of frontal systems will affect us over the next couple of days. A warm front will push through from the south later today and then a cold front approaches from the west later tomorrow. As a result, the overall humidity and the chance for showers and thunderstorms will increase by tonight and there can be some rain on Friday as well. Looking ahead, the potential exists for a dry weekend in the Mid-Atlantic region with warm conditions and lowering humidity following the passage of the cold front. The weather likely turns unsettled once again early next week as a potent system heads this way on Monday.
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High pressure that had its origins up in Canada will continue to influence the weather around here providing us with another pleasant day featuring comfortable temperatures and low humidity. This high will move offshore on Thursday and a couple of disturbances will head this way from the middle of the country. As a result, the humidity and chance for showers and thunderstorms will increase later tomorrow and it looks like the threat for rain will continue on Friday as well. Looking ahead, the potential exists for a dry weekend in the Mid-Atlantic region with comfortable temperatures as another high pressure system expands into the region. The weather likely turns unsettled once again early next week.
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It looks like the month of August will feature multiple cooler-than-normal air masses dropping into the US from Canada which continues a trend that has encompassed much of the summer season so far and impacted large areas of the country. The one areal exception to this pattern has been the Southwest US where intense upper-level ridging has resulted in persistent excessive heat during the past several weeks. These intrusions of cooler-than-normal air this summer has balanced out the excessive heat in the Southwest US leaving the nation with nearly normal temperatures as we begin the month of August.
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A reinforcing comfortable air mass will push into the northeastern states today with its origins in southeastern Canada. This influx of air with below-normal temperatures will limit any chances of reaching the 90 degree mark around here during the remainder of the week. In terms of rainfall, chances will be very limited through tomorrow, but then should ramp up by later Thursday and Friday with a couple of disturbances coming our way.
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A much more comfortable air mass pushed into the Mid-Atlantic region on Sunday following the passage of an active and strong cool frontal system on Saturday night. This pleasant air mass will be reinforced by a second comfortable air mass on Tuesday limiting any chances of reaching the 90 degree mark this entire week in the DC metro area. In terms of rain, there can be isolated showers and thunderstorms around today, but the next more organized threats will come late Thursday and likely again on Friday.
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A big-time change is coming to the Mid-Atlantic region with much more comfortable conditions for Sunday, Monday, Tuesday and Wednesday. The transition from the brief stint of high heat and humidity to the cooler temperatures and lower humidity will come with another round of heavy showers and strong thunderstorms. A cool front drops southeast today across the eastern Great Lakes and passes through the Mid-Atlantic in the overnight hours paving the way for those big-time changes.
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Today is likely to turn out to be the worst day in this brief stretch of high heat and humidity with afternoon highs well up in the 90’s and dew points at 70+ degrees. It remains hot going into the weekend, but big changes are on the way. A cool front will approach the region later tomorrow likely accompanied by showers and thunderstorms. Some of the storms late today/early tonight and on Saturday can be strong-to-severe and some of the rain can be heavy. Following the passage of the front on Saturday night, big-time relief will push into the Mid-Atlantic region for Sunday, Monday, Tuesday and Wednesday. Temperatures on those days will be below-normal for late July and humidity will be noticeably lower than on Thursday or today.
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The next two days will feature high heat and humidity in the DC metro region with high temperatures up in the 90’s and dew points in the 70’s. The active weather pattern of late will continue as well over the next few days with the threat of heavy showers and strong thunderstorms later today and again on Saturday. The culprit today will be yet another wave of energy dropping southeast across the Great Lakes and the Saturday threat comes ahead of an incoming strong cool front. The passage of the cool front on Saturday night will bring us significant relief in the heat and humidity for Sunday, Monday and Tuesday.
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After another pounding late yesterday in some spots in terms of strong thunderstorm activity and heavy rainfall, today should feature rain-free and very warm conditions as high pressure pushes off the east coast. The repositioning of the high pressure to the east of here will allow for the advance to the north and east of a hotter air mass that will impact us tomorrow and Friday. In fact, the next two days are likely to feature high temperatures well up in the 90’s - the hottest weather so far this summer season. There is a chance that tomorrow and Friday indeed turn out to be the hottest days of the year…we’ll know more about that in coming days and weeks.
In addition to the heat on Thursday, there will be yet another wave of energy dropping to the south and east across the Great Lakes and, yes, this system will again enhance the chance for strong thunderstorms and heavy rainfall in the I-95 corridor…most probable during the afternoon/evening hours. Looking ahead, its stays hot on Saturday ahead of an incoming cool front and the passage of the front will usher in much more comfortable air to the Mid-Atlantic region for Sunday and Monday.
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