The 850 temps sampled on the 18z special RAOB ahead of the line occurred only 5 times before in recorded history at the IAD site. You could tell early in the day on the 12z ILN site that something big was about to happen because the EML was evident so early in the morning. That airmass advected ahead of the complex and sustained it over the mountain. Reanalysis of the event showed that every meso model that correctly modeled the EML successfully predicted the derecho making it to the coastline. If there's on big takeaway from that event, it was that correctly sampling, identifying and modeling EMLs in the Mid Atlantic will significantly increase the ability of forecasters to anticipate these events and provide timely IDSS to the appropriate officials.
It seems that for today, we need to look to northern WV and far western MD. Most of the meso models are targeting this spot around 3:00 pm. That seems to be the benchmark.
Perhaps I'm being a bit too pessimistic (there's a first), but it seems like temps on MOS are trending down below 80 after tomorrow and the POPs are more in the 50% - 70% chance now instead of the 30% to 50% they were a few days ago.
Starting to think this might be the theme of the summer and we don't see any big heat. We're almost in June and it's been really cold and gloomy overall.
Over performed on temps today. Grids had 78 for Reisterstown and I'm sitting at 82. Farmers are really behind though with cold soil, so we need this warm weather. Corn, squash, pumpkins and melons aren't even planted yet.