An unsettled stretch of weather featuring scattered showers and thunderstorms is coming to the Mid-Atlantic region from later today through Tuesday night of next week and some of the rain can be heavy at times. A cold front will approach the Mid-Atlantic region later today and then grudgingly push across the area on Saturday and high pressure will then try to build in for the latter part of the upcoming weekend. The high pressure system will quickly retreat early next week and a couple more frontal systems will impact the region right through Tuesday night. Finally, a strong cool front will sweep through the area by early Wednesday and skies should become sunny at mid-week as high pressure edges into the area.
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An unsettled stretch of weather is coming to the Mid-Atlantic region beginning later tomorrow and likely lasting into the middle of next week…
High pressure is positioned well out to sea today and two low pressure systems will approach the Mid-Atlantic region during the next couple of days. One low is riding up along the Southeast US coastline and the other will approach our area from the west. The result here will be clouds and limited sun for today and an increasing chance of showers from later tomorrow into Saturday. Other systems will keep it unsettled around here from later Sunday into the middle of next week with the threat of occasional showers and thunderstorms.
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Strong high pressure has shifted to a position off the east coast and the result will be an influx of summer-like air in the Mid-Atlantic region and temperatures climbing well up into the 80’s during the next few days. While there will be some sunshine in the near-term, it will be dimmed at times from haze being caused by Canadian wildfires up north and this will make for redder-than-normal sunrises and sunsets as well. The weather turns more unsettled for the late week and early part of the weekend with an approaching frontal system and an increasing chance of showers and thunderstorms.
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Strong high pressure shifts offshore today and this will result in a warming trend for the area. Temperatures can climb into the lower 80’s today to go along with plenty of sunshine and then soar to the upper 80’s on Wednesday and Thursday...a few spots can top out at 90 degrees. The weather turns more unsettled again for the end of the week and the early part of the weekend with an approaching frontal system and an increasing chance of showers and thunderstorms.
One final note, the first official 90-degree day is possible on Wednesday or Thursday and should this take place, it would be about three weeks behind the average and the latest first 90-degree day since 2016.
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Strong high pressure builds just to the south of here today and it’ll be in control of the weather for the next few days. As it gradually slides to the south and east, a warming trend will get underway and temperatures will climb from a chilly start to the day this morning to near 90 degrees for afternoon highs on Wednesday and Thursday. The weather becomes somewhat unsettled late in the week with a weak upper-level trough forming in the eastern states.
One final note, while not a record, the low temperature of 48 degrees on Sunday morning at Washington’s Reagan National Airport (DCA) was the first June day below 50 since the 49 degrees on June 1, 1984, and the lowest June temperature since 47 degrees occurred on June 11, 1972 (which happened to be the month that featured Tropical Storm Agnes).
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A heavy rain event is headed to the Mid-Atlantic region with as much as 3 or 4 inches on the table in some spots...
A cold front will stall-out in close proximity later today and low pressure will form along its boundary zone. As a result, showers and thunderstorms are likely to impact the region from later today into later Saturday...some of the rain will be heavy at times and some of the thunderstorms can be strong-to-severe with damaging wind gusts and possible hail. Another cold front will cross the region late tomorrow sweeping away the unsettled weather and it’ll turn drier on Sunday with plenty of sunshine to go along with windy and cooler-than-normal conditions for the first day of June. The first half of next week looks dry as well with increasingly warm conditions leading to high temperatures well up in the 80’s by mid-week.
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The 2025 Atlantic Basin tropical season officially gets underway on Sunday, June 1st, and there are signs that the initial threat could come as early as ten days or so from now (i.e., June 8, 9, 10th time frame). A teleconnection index known as the Madden-Julian Oscillation or MJO appears to be foreshadowing the potential of tropical troubles in this time frame as it transitions into a “phase” that is generally quite favorable for activity in the Atlantic Basin. In addition, a second favorable sign may be the evolution of the upper-level pattern of highs and lows across North America which may feature strong ridging over southeastern Canada in about ten days or so. A strong ridge in this part of North America is often favorable this time of year for an “undercutting” tropical system in the southwestern Atlantic, Gulf of America, or Caribbean Sea where sea surface temperatures are generally warmer-than-normal.
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It’ll turn warmer today following the unseasonably cool weather conditions on Wednesday and this afternoon’s high temperatures should end up in the mid-to-upper 70’s. Skies will be mainly cloudy early this morning and then partly sunny for the mid-day and afternoon hours. A cold front will cross the region tonight with a few showers possible and then it’ll stall nearby on Friday. Low pressure will then ride up along the stalled-out frontal boundary zone bringing with it more rain and possible thunderstorms to the Mid-Atlantic region from later Friday into Saturday….some of the rain can be heavy and some of the storms can be strong. Another cold front arrives late Saturday sweeping the unsettled pattern away and the overall pattern turns drier and increasingly warm during the early part of next week (which is the beginning of the month of June).
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Low pressure is intensifying near the Mid-Atlantic coastline this morning and it will keep it breezy and quite cool around here through tonight with periods of rain. This system will push away on Thursday, but a cold front will approach and then stall in the area for the late week. There can be a few showers from Thursday into Friday and then a period of steadier (and more beneficial) rain is likely from later Friday into early Saturday as low pressure forms along the stalling-out frontal boundary zone. Temperatures will be well below-normal today with an ocean flow of air and will remain slightly below-normal right into the weekend. The pattern looks like it’ll turn warmer and drier as we transition to the beginning of June on Sunday and into early next week.
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Recent rain events in the Mid-Atlantic region have helped to alleviate drought conditions that began to develop last fall and more beneficial rainfall is on the way with two storm systems. Clouds will lower and thicken today as high pressure shifts off to the east of here and low pressure pushes into the Ohio Valley. A new low pressure system will form by early tomorrow near the Mid-Atlantic coastline and it will produce periods of rain for the mid-week and quite cool conditions as a low-level ocean flow of air forms in the DC-to-Philly-to-NYC corridor. In fact, temperatures may end up being some twenty degrees below-normal on Wednesday with the influence of the still chilly western Atlantic Ocean. A cold front then pushes through the region on Thursday night with a few showers and stalls in the area on Friday. Another low pressure system will likely ride up along that stalled-out boundary zone potentially bringing another round of soaking and beneficial rainfall to the Mid-Atlantic region from late Friday into Saturday.
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