Some staggering rainfall amounts in the Mid-Atlantic region from late yesterday through the overnight hours with more than seven inches estimated by satellite in some spots. The hardest hit areas for rainfall included southern Chester County in southeastern Pennsylvania and northern Delaware where more than seven inches fell causing some serious flash flooding issues. Just to the east of DC, a possible tornado hit Kent Island, Maryland during the wee hours of the morning with damage now being investigated. A radar map of the thunderstorm cell showed rotation early this morning (red and green couplet) just to the south of Bowie and just before its arrival over Kent Island. Meanwhile, a cold front will work its way through the region today and there can be another round of late day or evening showers and thunderstorms and some of the storms can be strong-to-severe. High pressure will take control on Tuesday and the air mass will become noticeably more comfortable. Another front will bring back some unsettled weather here towards the end of the work week.
Read More
The work week will close out with more uncomfortable heat and humidity in the DC metro region, but there is some relief in sight. Temperatures today will climb to the mid 90’s and the humidity will make it feel closer to 100 degrees (i.e., the heat index). There can be scattered showers and thunderstorms this afternoon and evening and any storm that forms can be on the strong side. As a front stalls out nearby this weekend, our chances of showers and thunderstorms will tend to increase and some of the storms this weekend can be on the strong side. On Monday, a cold front will approach from the west and showers and thunderstorms are quite likely and some of these storms can be on the strong side as well. Following this early week frontal passage, genuine relief will push into the area for Tuesday and Wednesday of next week.
Read More
This latest stretch of heat and humidity looks like it will peak in intensity during the next couple of days with highs in the mid-to-upper 90's and heat indices closer to 100 degrees (i.e., how it feels given the high humidity). It'll stay hot this weekend as well, but likely not quite as bad as today and Friday with more clouds and multiple chances of showers and storms. In terms of potential relief, one cold front will approach the region today; however, it’ll tend to weaken and stall out and not provide any relief to the I-95 corridor. Another cold front is likely to drop through the area early next week and it looks like that one should bring noticeable relief to the region by Tuesday.
Read More
The remainder of the work week looks uncomfortably hot and humid and it won't get any better this weekend. Weak high pressure will be in control today and temperatures should climb to the low 90's for afternoon highs and then likely to the mid 90's on Thursday and Friday. A weak cool front will move across the area late tomorrow and then stall out near the Delmarva Peninsula - ultimately returning here as a warm front by later in the weekend. The weekend may feature some cloudy spells, still hot and humid conditions, and showers and thunderstorms cannot be ruled out on either day.
Read More
It'll turn quite hot around here for Wednesday, Thursday and Friday and the potential exists for some very 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 well 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.
Read More
Here we go again…the atmosphere is very unstable in the I-95 corridor region between DC and Philly and storms are exploding in and around the area. Strong thunderstorms threaten the DC and Philly metro regions between now and mid-evening and any storm can produce the full works…i.e., heavy rain, hail, damaging wind gusts and frequent lightning. In addition, the grounds are still pretty saturated in many areas so downpours can cause flash flooding with any one of these individual thunderstorm cells.
Read More
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 for the next couple of days and it is looking like the second half of the week will become quite hot and humid.
Read More
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.
Read More
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 extreme 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.
Read More
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.
Read More
