It'll turn quite hot around here for Wednesday, Thursday and Friday and the potential exists for some hot weather this weekend as well. High pressure has pushed off the east coast and a trough has expanded in the upper atmosphere just to our west. As a result, very warm and moist air will flow northward into the Mid-Atlantic region over the next several days and our temperatures for the second half of the week will climb into the 90’s. While there can be late day or evening showers and thunderstorms over the next couple of days, most of the time will be rain-free.
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High pressure will push away today and an upper-level trough of low pressure will approach from the west and stall out nearby. As a result, the chance for scattered showers and thunderstorms will increase some for the next couple of days and it is looking like the second half of the week will be quite hot and humid.
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There are two big weather concerns for the Mid-Atlantic region this afternoon and evening and they revolve around the potential for flash flooding and the possible formation of severe thunderstorms. The greatest chance for flash flooding appears to be in areas near and north of the PA/MD border where copious amounts of rain has already fallen and the greatest chance for severe thunderstorms is likely to take place near and south of the PA/MD border where sunshine has boosted temperatures into the lower 90’s at mid-day in some spots. Two systems will play a role later today in the potential additional heavy rainfall and severe thunderstorm activity in the I-95 corridor. First, a surface cold frontal system is moving slowly southeastward from the Ohio Valley towards the Mid-Atlantic and second, an upper-level wave of energy is pushing eastward across the Great Lakes. The combination of these two systems will generate upward motion in the I-95 corridor during the afternoon and evening hours and the radar will likely explode as a result.
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An upper-level wave of energy will combine with a slow-moving surface cold front to enhance our shower and thunderstorm activity later today and this can include some heavy rainfall and strong-to-severe storms. The heat peaked on Thursday, but the high humidity levels will remain for another day and this moisture content will contribute to the potential for some downpours later today into tonight. Weak high pressure will build in for the weekend bringing us some improvement in the overall weather pattern.
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The atmosphere is hot and excessively humid in the Mid-Atlantic region and all it will take to “squeeze out” that moisture is some lifting action that can be provided by a surface frontal system or an upper-level wave of energy. While there will be some heavy showers and strong thunderstorms later today and tonight in parts of the I-95 corridor, the best chance of heavy rain and strong-to-severe thunderstorm activity for all areas appears to be unfolding for the Friday afternoon and evening hours. A surface cold frontal system and an upper-level wave of energy will cross the Great Lakes over the next 24 hours and likely provide enough lifting around here later tomorrow for some heavy rainfall and possible strong-to-severe thunderstorms.
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Oppressive heat and humidity will persist today as high pressure continues to influence our weather. A weakening frontal system will approach the region tonight and then a secondary frontal system will follow late tomorrow. Each of these two fronts can generate showers and thunderstorms for the Mid-Atlantic region from later today into tomorrow night with some heavy downpours and possible strong-to-severe thunderstorms. Weak high pressure will build in for the weekend bringing us some improvement in the overall weather pattern
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Over the next three days, there will be oppressive heat and humidity for the I-95 corridor, heavy rainfall at times, and possible strong-to-severe thunderstorm activity. High pressure will continue to influence our weather today and Thursday and it’ll produce some sunshine each day along with high heat and humidity. In fact, some locations could reach record high levels on Thursday afternoon. There will be enough instability in the atmosphere later today for some scattered showers and thunderstorms and any storm that forms can be on the strong side. As a frontal system slowly approaches the region later tomorrow night, our chances for showers and thunderstorms will increase and we are likely to see some heavy rainfall at times from later tomorrow into Friday night. In addition, there can be some strong-to-severe thunderstorms to deal with from later tomorrow into Friday night. Looking ahead, the weekend will feature much improvement with sunshine and more comfortable conditions.
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A cold frontal system will approach the region today and likely generate showers and thunderstorms - some of the storms can reach strong-to-severe levels. This front will stall out in the general vicinity over the next 24 hours keeping us unsettled at mid-week and we’ll stay rather hot. By early Thursday, this front will push northward, but then high pressure should build across southeastern Canada and the Great Lakes region by Friday which will force this same frontal system back to the south and it should finally clear the I-95 corridor by the weekend. There is the chance for some heavy rainfall on Thursday night and Friday as this frontal system finally passes through the region.
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An unsettled week with a very warm stretch is headed our way after a decent weekend that featured a spectacular finish on Sunday with comfortable humidity levels. A frontal system will approach on Tuesday and the threat for showers and storms will increase and some of the storms late tomorrow/early tomorrow night can be on the strong-to-severe side. This same front will meander around the area during the mid-week and we could deal with another round of strong-to-severe thunderstorms later Thursday and Thursday night. Temperatures from Tuesday through Thursday should climb close to the 90 degree mark for afternoon highs.
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Our soaking rain event will wind down late today and an evening frontal passage will usher in a more comfortable air mass for the weekend. Temperatures later today will become warmer than yesterday following the advance of a warm front and it will remain on the humid side. While still in the 80’s this weekend, the air mass will feel more comfortable as overall humidity levels will be lower.
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