An area of showers and thunderstorms that developed late yesterday over the Upper Midwest dropped southeast across the Great Lakes in the overnight hours. This system will impact parts of the Mid-Atlantic region this morning, but likely stay just to our southwest. High pressure will build back into the area later today and it’ll stay warm into the latter part of the week. A cold front should push through the area by the end of the week paving the way for more comfortable temperatures this weekend.
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A strong ridge of high pressure in the upper part of the atmosphere has formed over the nation’s mid-section and the Mid-Atlantic region is on the outer periphery of this large-scale system. As such, winds aloft in this part of the nation are flowing from northwest-to-southeast and often times this time of year, the outer perimeter of strong high pressure ridging is an active zone with strong thunderstorm activity. Indeed, this “ring of fire” around the high pressure system is very active today with a complex of thunderstorms now exploding over the Upper Midwest. This “mesoscale convective system” (MCS) as it is referred to by meteorologists is likely to drop southeastward in the overnight hours and reach somewhere in the Mid-Atlantic region on Tuesday morning. Latest trends and observations suggest the worst of the MCS could focus on DC, Maryland, Virginia and the Delmarva Peninsula, but stay on guard in Philly.
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After an unsettled weekend featuring occasional showers and thunderstorms, it’ll turn warmer this week, but with continued unsettled conditions and chances of showers and thunderstorms. Strong high pressure ridging has set up from the middle of the nation to the southeastern states providing that part of the country with some very hot weather. The Northeast US is on the outer perimeter of this upper-level ridge and it is an active region to be in with the possibility of showers and storms moving from NW-to-SE in coming days to the northeastern states. Looking ahead, a cold front is destined to push through the region by the weekend bringing comfortable temperature temperatures back to the area.
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High pressure expanded into the Mid-Atlantic region on Thursday and it stays close enough today to provide us with more sunshine and comfortable temperatures. The weather, however, gets more unsettled as we get into the weekend as weak low pressure systems will push in this direction on each day. As a result, a few showers are possible on Saturday although the day will not be a washout and it’ll be a bit cooler. Sunday should turn a bit warmer and there is the threat of showers and maybe a couple of thunderstorms. High pressure resumes control across the NE US on Monday and there should be plenty of sunshine during the first half of next week with temperatures in the 80’s. At the same time, much of the southern US will undergo a big-time heat wave.
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Highs temperatures on Friday are likely to reach 100 degrees in Dallas, Texas and this could begin an impressive string of days at or above the century mark in that particular location. High pressure ridging has been quite strong recently in the region from California-to-Texas and it will intensify over the next few days and then build eastward next week all the way to the Southeast US coastline. It is not unprecedented to see this kind of June heat in Texas or other parts of the southern states and Dallas will have a tough time matching the sustained and extreme heat of the summer of 1980.
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High pressure builds into the region later today with an influx of drier air and gusty winds and then a comfortably cool night will be followed by a nice day on Friday. Another low pressure system will develop in the Mid-Atlantic region on Saturday and there will be a noticeably cooler air mass pushing into the area. Showers are likely to go along with the unusually cool conditions and temperatures will no better than the low-to-mid 70’s for afternoon highs. It’ll stay unsettled on Sunday given the chilly air aloft with the continuation of below-normal temperatures and a threat for showers.
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An active weather pattern continues across the nation with multiple upper-level disturbances moving along in a west-to-east fashion and this is resulting in numerous rain threats for the Mid-Atlantic region. One such upper-level disturbance will help set off the formation of a low pressure system today over the Upper Midwest and this system will intensify later tonight over the Mid-Atlantic region enhancing the chance here for some heavy rainfall, flash-flooding, and potentially strong-to-severe thunderstorm activity.
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Low pressure will form later today along a stalled-out frontal boundary zone near the east coast enhancing the chances here for showers and thunderstorms from later tonight into early Thursday. Some of the overnight rain can be heavy at times and some of the storms can be strong-to-severe. High pressure builds into the region later tomorrow and the work week will close out on a positive note with plenty of sunshine on Friday and comfortably warm conditions. Low pressure will form near the east coast on Saturday and the first half of the weekend could turn out to be unusually cool for this time of year and wet with occasional showers likely in the Mid-Atlantic region. It’ll stay unsettled on Sunday given the chilly air aloft with the continuation of below-normal temperatures and the threat of showers.
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A cool front will approach the region later today and it is a system that will be slowing down as it reaches the eastern seaboard. As a result, low pressure is likely to form later tomorrow along the stalling-out frontal boundary zone near the east coast. Showers are possible later today and tonight associated with the arrival of the frontal system and then more rain is likely later tomorrow and tomorrow night linked with the low pressure. Some of the rain later tomorrow and tomorrow night can be heavy at times. High pressure builds into the region for the latter part of the work week, but the early part of the weekend could feature another low pressure system in the Mid-Atlantic region. As a result, Saturday could actually turn out to be a rather cool and rainy day for this time of year with some improvement possible on Sunday, but still cooler-than-normal temperatures.
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June is now well underway and the good news in the weather department is that it looks like we can get through this first full week of the month without hitting the 90 degree mark. The bad news is that there will be at least a couple of chances for some significant rainfall. A cool front will approach the region on Tuesday and its slow movement will allow low pressure to develop at mid-week along its boundary zone. Consequently, the threat of rain will increase later tomorrow and continue into Wednesday night and some of it can be heavy at times. High pressure builds into the region for the latter part of the work week, but the early part of the weekend could feature another low pressure system in the Mid-Atlantic region. As a result, Saturday could be wet and cool for this time of year and some of that rainfall can be heavy at times.
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