There is a very slight chance of a pop-up thunderstorm between 8 p.m. and 3 a.m. with the passage of a cold front in our region. On Saturday, I mentioned how we would probably be sandwiched in between most of the energy for Tuesday with this front. This looks to remain the case. I’d probably focus in on the eastern half of the region for any sign of a pop-up cell. Temperatures aloft aren’t much different than the surface and thus that is limiting the unstable parcels of air. Westerly winds this afternoon will also put a cap on the convective development through tonight.
For Wednesday, the cold front will be south of the Delmarva region. A wave of low pressure now appears to develop along the boundary. Depending on the exact location of the front as this wave passes by, it may just be close enough to spread a few thunderstorms and showers across Cape May, Dover, and Georgetown. Meanwhile, a secondary cold front is expected to approach the region as well later Wednesday. This too could bring a shower or thunderstorm threat to the remainder of the region, but the greatest moisture plume there is with the front is going to lie in New England. But should there be any interaction with the low passing by on what will be the former front, there could be just enough organized lift to pop a cell. With all of these disturbances expected, I am expecting more in the way of clouds then sunshine.
Behind the secondary front, it looks like several days of sunshine are in store. High pressure will be in control of our weather. Less humid and more seasonable temperatures will overspread the area making for some gorgeous, good weather days. The high will begin to push away from the area on Saturday or Sunday and allow a southerly flow to begin to draw up more heat and moisture by the end of the extended forecast period. It might be possible that showers and thunderstorms ride up on the western edge of the high, impacting Baltimore….Washington….Lancaster…and Reading areas by Saturday. That will be fine-tuned in later forecasts!
As you may know, there were numerous reports of wall clouds & funnel clouds in Winslow and Hammonton Townships on Friday. Two pictures were received as these rotating clouds in this area. Doppler radar indicated a well-defined hook echo. However, the track of the funnel cloud remained over farmland and forests. There were no reports of any damage. Today, I took part in a helicopter mission with to see if there was any damage hidden in the inaccessible by vehicle… woods or farmland. None was seen from the air.
The thunderstorm developed in Salem and Cumberland Counties, around Route 49. In the early development…a possible funnel cloud was reported to have developed just southwest of Route 49 around Shiloh by a few people. A picture did surface of this funnel cloud. Interestingly enough, the velocities on the radar did not show much rotation at the time of the first funnel cloud. The storm then weakened some….but became more indicative of a rotating thunderstorm as it approached Northwestern Atlantic, Eastern Camden, and Southern Burlington Counties.
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